Touch screen display device and control method therefor

Abstract

The present invention relates to a touch screen display device, and more particularly, to a touch screen device for implementing a hover touch function by means of a touch and display driver integration (TDDI) system in which a touch IC and a display driver IC are integrated. The present invention comprises: a touch sensor for sensing touch data; a touch IC configured to control the touch sensor; a display driver IC configured to control a display panel; and a touch display integrated driver (TDDI) in which the touch IC and the display driver IC are integrated, wherein the touch IC processes the touch data on the basis of display information received from the display driver IC.

Description

Touchscreen display device and control method thereof

[0001] The present invention relates to a touchscreen display device and a method for controlling the same.

[0002] Hover Touch technology detects the proximity of input devices, such as fingers or styluses, to the screen without the user physically touching the display. This technology operates based on changes in capacitance and is being widely researched and developed in touch panels and TDDI (Touch and Display Driver Integration) systems.

[0003] However, conventional hover touch technology has the following problems.

[0004] First, if the sensor gain value is set high to detect minute touch sensitivities, such as hover touches, a problem arises where noise is amplified along with the increased sensitivity of the touch signal. This lowers the reliability of the touch data and increases the likelihood of detection errors.

[0005] Second, when the display driving signal and the touch detection signal operate at the same time, the touch signal data fluctuates significantly depending on changes in the display color or brightness. This fluctuation is caused by interference from the display signal, making it difficult to distinguish between the touch signal and the display signal.

[0006] Third, increasing the driving voltage level of the Touch Tx signal to improve touch signal sensitivity may increase electromagnetic interference in the display, causing flickering on the screen. This phenomenon not only degrades the user experience but also undermines the stability of the display and touch performance.

[0007] Therefore, a technical solution is needed to resolve the aforementioned problems and improve the stability of hover touch detection.

[0008] The present invention aims to provide a technical solution that minimizes interference between a display driving signal and a touch signal and reliably detects hover touches.

[0009] The technical problems to be solved by the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

[0010] A touchscreen display device according to one embodiment of the present invention includes a touch sensor for detecting touch data, a touch IC configured to control the touch sensor, a display driver IC configured to control a display panel, and a touch and display driver integration (hereinafter TDDI) in which the touch IC and the display driver IC are integrated, and the touch IC may include processing the touch data based on display information received from the display driver IC.

[0011] In a touchscreen display device according to at least one embodiment of the present invention, the touch sensor may include detecting a change in capacitance and transmitting data to the touch IC.

[0012] In a touchscreen display device according to at least one embodiment of the present invention, the touch IC can process hover touch data in a blank section and normal touch data in a display active section.

[0013] In a touchscreen display device according to at least one embodiment of the present invention, the hover touch data includes data detected without directly contacting the touch sensor, and the normal touch data may include data detected by directly contacting the touch sensor.

[0014] In a touchscreen display device according to at least one embodiment of the present invention, the blank section may be a section in which pixel data is not transmitted to the display panel.

[0015] In a touchscreen display device according to at least one embodiment of the present invention, the display information may include refresh rate information.

[0016] In a touchscreen display device according to at least one embodiment of the present invention, the display driver IC can vary the blank interval based on the refresh rate information.

[0017] In a touchscreen display device according to at least one embodiment of the present invention, the display blank section can be varied by adjusting the vertical front section (VFP) and / or vertical back section (VBP) of the vertical synchronization signal (Vsync) in a variable refresh rate (VRR) mode.

[0018] Meanwhile, a control method for a touchscreen display device according to one embodiment of the present invention may include the steps of detecting touch data, receiving and processing the detected touch data, and processing the touch data based on display information received from a display driver IC.

[0019] In the method of at least one embodiment of the present invention, the step of detecting touch data may include detecting a change in capacitance and transmitting data to a touch IC.

[0020] In the method of at least one embodiment of the present invention, the step of processing hover touch data in a blank section and processing normal touch data in a display active section may be further included.

[0021] In the method of at least one embodiment of the present invention, the hover touch data includes data detected without direct contact with the touch sensor, and the normal touch data may include data detected by direct contact with the touch sensor.

[0022] In the method of at least one embodiment of the present invention, the blank section may be a section in which pixel data is not transmitted to a display panel.

[0023] In the method of at least one embodiment of the present invention, the display information may include refresh rate information.

[0024] In the method of at least one embodiment of the present invention, the step of processing the touch data based on display information received from the display driver IC may include the step of varying the blank interval based on the refresh rate information.

[0025] In the method of at least one embodiment of the present invention, the display blank section may be varied by adjusting the vertical front section (VFP) and / or vertical back section (VBP) of the vertical synchronization signal (Vsync) in a variable refresh rate (VRR) mode.

[0026] According to at least one embodiment of the present invention, interference between a touch signal and a display driving signal is minimized, thereby improving touch sensitivity and ensuring the accuracy of touch signal processing. Accordingly, the performance of the touchscreen is improved, and in particular, the flickering phenomenon of the display screen is reduced, thereby increasing screen stability.

[0027] The effects obtainable from the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below.

[0028] FIG. 1 is a configuration diagram of a touchscreen display device according to an embodiment of the present invention.

[0029] Figure 2 is a diagram of the driving timing of a touchscreen display device operating with a conventional single-piece touch IC.

[0030] FIG. 3 is a diagram of the driving timing of a display touch device with a fixed display fresh time mode applied according to an embodiment of the present invention.

[0031] FIG. 4 is a diagram of the driving timing of a display touch device with a Variable Refresh Rate (VRR) mode applied according to an embodiment of the present invention.

[0032] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0033] The suffixes "module" and "part" used in this specification are used merely for nominal distinction between components and should not be interpreted as presupposing that they are physically or chemically distinguished or separated, or that they can be distinguished or separated in this way.

[0034] Terms containing ordinal numbers, such as “first,” “second,” etc., may be used to describe various components, but said components are not limited by said terms. These terms may be used solely in a nominal sense to distinguish one component from another, and their sequential meaning is determined not by such nomenclature but by the context of the description.

[0035] The term “and / or” is used to include any combination of the multiple items in question. For example, “A and / or B” means including all three cases, such as “A,” “B,” and “A and B.”

[0036] When it is stated that one component is "connected" or "joined" to another component, it should be understood that while it may be directly connected or joined to that other component, there may also be other components in between.

[0037] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0038] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0039] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0040] FIG. 1 is a configuration diagram of a touchscreen display device according to an embodiment of the present invention.

[0041] Of course, each component shown in FIG. 1 represents only the components related to the embodiment, and it goes without saying that in actual implementation, more components than this may be included in the touchscreen display device.

[0042] Referring to FIG. 1, the touchscreen display device includes a TDDI (100), a HOST (200), a display panel (300), and a touch sensor (400).

[0043] TDDI (Touch and Display Driver Integration, 100) includes a display driver IC (Display Driver IC, 110) and a touch IC (Touch IC, 120).

[0044] TDDI (100) is a device that integrates a touch IC (120) and a display driver IC (DDI, 110) into a single chipset and can perform the function of synchronizing a display driving signal and a touch signal.

[0045] In the TDDI (100), the touch IC (120) and the display driver IC (110) are integrated into a single chip, which reduces the number of components and simplifies the design, thereby saving internal space in the device and contributing to a reduction in manufacturing costs. Additionally, since the TDDI (100) handles both touch and display driving on a single chip, power consumption can be reduced. Furthermore, by optimizing the interaction between the display and the touch system, interference between the touch and display signals can be minimized, and overall screen quality can be improved. Additionally, since touch sensing is dynamically adjusted according to the display state, stable touch performance can be provided while maintaining high sensitivity.

[0046] The display driver IC (110) can control the display panel (300). It manages various information such as the refresh rate, brightness, and timing of the display panel (300), and can provide relevant information so that the touch IC (120) can accurately process touch signals.

[0047] The touch IC (120) converts a signal transmitted from the touch sensor (400) into a digital signal and analyzes the touch data to process the accurate input location and operation. According to one embodiment of the present invention, the touch IC (120) of the TDDI (100) receives display status information from the display driver IC (110) every frame and reflects it in the touch signal processing, thereby providing optimal touch performance suitable for the display status.

[0048] The HOST (200) can serve as a higher-level system that controls and manages the display driving and touch detection functions of the TDDI (100). The HOST (200) can function as a CPU or an AP (Application Processor), providing commands and data to enable the TDDI (100) to operate effectively, monitoring the system status, and coordinating the display and touch operations.

[0049] The display panel (300) is a component that controls the output and operation of the display screen in the TDDI (100) system. It outputs an image based on pixel data received from the display driver IC (110) and can be designed to minimize interference between the display driving signal and the touch signal. The pixel data is configured according to the screen resolution and refresh rate, and the display panel (300) accurately outputs it.

[0050] The display panel (300) periodically updates the screen based on timing signals (Vsync, Hsync) provided by the display driver IC (110). The display panel (300) can adjust the brightness and color of the screen according to commands received from the HOST (200) or the display driver IC (110).

[0051] The touch sensor (400) may include a touch panel of the display. It may detect changes in capacitance that occur when a user's finger or an object touches or approaches the screen through electrodes arranged on the surface of the display. It detects changes in capacitance and can transmit the detected touch data to the touch IC (120).

[0052] The touch sensor (400) can detect the touch of a user's finger or the hover state of a finger at a close distance using a capacitive method. Capacitive methods include mutual capacitive and self-capacitive methods.

[0053] Mutual capacitance is a method that detects changes in capacitance between two electrodes positioned along the X and Y axes at the bottom of the display; when a finger approaches these electrodes, the capacitance between them changes, and based on this, the position of the finger can be calculated.

[0054] Self-capacitive is a method in which each electrode independently detects changes in capacitance, and it is particularly advantageous for hover touch detection. When detecting a hover touch, as a finger approaches the display, the change in capacitance of individual electrodes increases, allowing the proximity of the finger to be detected even without physical contact.

[0055] Hover Touch is a technology on touchscreen devices that detects movement of a user's finger across the screen without the finger actually touching it. In other words, it is a feature that allows the device to recognize the location and respond simply by bringing a finger within a certain distance of the screen, without any physical contact.

[0056] Figure 2 is a diagram of the driving timing of a touchscreen display device operating with a conventional single-piece touch IC.

[0057] Referring to FIG. 2, the driving timing of a display touch device operating with a conventional single-piece touch IC includes a Display signal (S11), a Vsync signal (S12), and a Touch Tx (S13) signal.

[0058] Referring to the Display signal (S11), the Display signal (S11) can be divided into a Blanking Interval section (hereinafter, the first blank section, T1) and a Display Time section (hereinafter, the first display active section, T2).

[0059] The first blank period (T1) is the time during which the display is disabled at the time of frame transition. During this period, the display does not transmit or update pixel data, and the process of preparing for the next frame proceeds. The role of the first blank period (T1) is to prevent screen flickering or data transmission errors that may occur during frame transition and to help ensure that the frame transition proceeds smoothly.

[0060] The first display active period (T2) is the time during which the display actually displays an image or data on the screen. During this time, the display can activate pixel data and display an image on the screen. In other words, it is a period during which the pixels of the display are turned on so that the user can view the screen. The first display active period (T2) is the time for transmitting and processing the pixel data of a frame, and the time during which the frame is displayed on the screen varies depending on the display refresh rate. During the first display active period (T2), the display continuously processes pixel data, and the result appears to the user on the screen.

[0061] Referring to the Vsync signal (S12), the Vsync signal (S12) is activated during the first blank interval (T1) of the Display signal (S11). The Vsync signal (S12) is a vertical synchronization signal that indicates the frame switching time in the display. The Vsync signal (S12) occurs at the time when one frame ends and the next frame begins to display a new frame. Through this, the display driver IC (110) manages frame switching and resets pixel data on the screen. Since the standalone touch IC, which is not part of the TDDI (100) structure, operates independently, it can receive the Vsync signal (S12) to synchronize the touch signal in order to prevent a conflict between the display driving signal and the touch signal. By receiving the Vsync signal (S12), the standalone touch IC can recognize the timing when the display switches frames and determine the optimal time to transmit the touch signal.

[0062] Referring to the Touch Tx signal (S13), the Vsync signal (S12) and the Touch Tx signal (S13) are synchronized. The Touch Tx signal (S13) is a signal transmitted from a standalone touch IC to a touch sensor to detect changes in capacitance. When driving the standalone touch IC, the Vsync signal (S12) is received, and the Touch Tx signal (S13) is transmitted in a synchronized manner. This synchronization method minimizes interference between the touch signal and the display signal by transmitting the touch signal in accordance with the display frame switching time.

[0063] In conventional standalone touch ICs, display driving and touch detection are performed separately, so signal interference may occur if complete synchronization is not achieved. In particular, for high-resolution or high-frequency displays, the display driving speed is fast, so the possibility of interference increases when touch signals are processed asynchronously. To solve this problem, the touch signal and the display driving signal are synchronized using a Vsync signal (S12), but signal interference may still exist.

[0064] Furthermore, in the case of a touchscreen display device operating with a conventional standalone touch IC, if the gain of the Touch Tx signal (S13) is increased so that it can detect minute capacitance changes such as hover touch, not only the touch signal but also the noise generated by the display may be amplified. The noise generated at this time may include electromagnetic signals caused by changes in brightness or color output by the display on the screen. The display exchanges electrical signals to output an image on the screen, and this operates differently depending on brightness or color. Whenever the display becomes brighter or the color changes, the electromagnetic environment changes, causing interference with the touch signal, and in this case, it becomes difficult to distinguish between the touch signal caused by an actual finger and the signal generated by the display.

[0065] In addition, if the Touch Tx (S13) driving level is increased to increase the transmission strength of the touch signal, the touch sensitivity is improved, which may be advantageous for detecting fine signals, but due to the collision between the display active section (T2) and the touch signal, a flickering phenomenon called Flicker may occur on the screen.

[0066] FIG. 3 is a diagram of the driving timing of a display touch device with a fixed display fresh time mode applied according to an embodiment of the present invention.

[0067] Referring to FIG. 3, the driving timing of a display touch device with a fixed refresh rate mode of the present invention includes a Display signal (S21), a Vsync signal (S22), a VBlank signal (S23), a Touch Sync signal (S24), and a Touch Tx (S25) signal.

[0068] Referring to the Display signal (S21), the Display signal (S21) can be divided into a Blanking Interval section (hereinafter, the second blank section, T3) and a Display Time section (hereinafter, the second display active section, T4).

[0069] The display signal (S21) is a signal that drives one frame of the display and can update the frame at a constant period at a fixed refresh rate. Generally, since it is difficult to change the refresh rate for video playback, a fixed refresh rate mode can be applied.

[0070] The second blank period (T3) of the display signal (S21) is an inactive period during which the display does not transmit pixel data, and can provide time during the second blank period (T3) for touch detection to occur.

[0071] The second display active section (T4) of the display signal (S21) may be an active section where the display transmits pixel data and renders the screen. Since there may be a possibility of interference between the display and the touch during the display active section (T4), the touch detection may be restricted.

[0072] In an environment where a fixed refresh rate mode is applied, the display signal (S21) has a fixed refresh rate, and the lengths of the second blank interval (T3) and the second display active interval (T4) may also be constant. For example, in a 60Hz environment, one frame period is fixed at approximately 16.67ms.

[0073] The Vsync signal (S23) is a vertical synchronization signal indicating the start of a new frame of the display and includes a vertical front porch (VFP; hereinafter VFP) and a vertical back porch (VBP; hereinafter VBP). VFP is a waiting time from the end of a frame until the start of a new frame, and VBP may be a waiting time for stabilization before the start of a new frame.

[0074] The Vsync signal (S23) can be generated at a constant interval in a fixed refresh rate mode. The interval of the Vsync signal (S23) is fixed according to the refresh rate, and the display timing and touch timing can be synchronized based on this signal.

[0075] The VBlank signal (S23) is a signal indicating that the display output is stopped during the second blank period (T3).

[0076] The VBlank signal (S23) indicates a second blank period (T3), during which the display driving signal may be disabled. Hover touch detection may be performed while the VBlank signal (S23) is active. In a fixed refresh rate mode, the length of the VBlank signal (S23) is fixed and may be constant according to the refresh rate.

[0077] The Touch Sync signal (S24) can stably process touch data during the second blank period (T3) and the second display active period (T4) by synchronizing the touch signal detection timing with the display timing (Vsync, VBlank). In the second blank period (T3), the Touch Sync signal (S24) can perform hover touch detection by synchronizing with the VBlank signal (S23). Since the display driving signal is disabled in the second blank period (T3), touch detection interference can be minimized. In the second display active period (T4), the Touch Sync signal (S24) performs normal touch detection, but can adjust the signal strength considering the possibility of interference with the display driving signal or operate in a way that avoids interference. In a fixed refresh rate mode, the Touch Sync signal (S24) also operates within a fixed period and can maintain synchronization with the display timing.

[0078] The Touch Tx signal (S25) can induce a change in capacitance by applying voltage to the Tx electrode of the touch sensor (400) and detect this at the Rx electrode to generate touch data. In the second blank section (T3), the Touch Tx signal (S25) can operate with high sensitivity for hover touch detection, and during the second blank section (T3), the display driving signal is deactivated so that the change in capacitance can be stably detected without interference. In the second display active section (T4), the Touch Tx signal (S25) operates for normal touch detection, but can operate with low sensitivity or adjust the signal strength to avoid interference with the display driving signal.

[0079] FIG. 4 is a diagram of the driving timing of a display touch device with a Variable Refresh Rate (VRR) mode applied according to an embodiment of the present invention.

[0080] Referring to FIG. 4, the driving timing of a display touch device with a Variable Refresh Rate (VRR) mode applied includes a Display signal (S31), a Vsync signal (S32), a VBlank signal (S33), a Touch Sync signal (S34), and a Touch Tx (S35) signal.

[0081] The Display signal (S31) drives the display screen and can represent a frame cycle. The third blank interval (T5) is a Blanking Interval, which may be a period during which the display is deactivated without transmitting pixel data. The third display active interval (T6) is a Display Time, which may be a period during which pixel data is transmitted and the screen is rendered.

[0082] When the Variable Refresh Rate (VRR) mode is applied to the Display signal (S31), the Refresh Rate is dynamically adjusted, thereby increasing or decreasing the length of the third blank section (T5). If the Refresh Rate is lowered, the third blank section (T5) becomes longer, and if the Refresh Rate is higher, the third blank section (T5) becomes shorter. According to one embodiment of the present invention, in a situation where a hover touch is required, the Refresh Rate is lowered to extend the third blank section (T5), thereby increasing the time for detecting the hover touch.

[0083] The Vsync signal (S32) may be a vertical synchronization signal indicating the start of a new frame. It includes a vertical front porch (VFP; hereinafter VFP) and a vertical back porch (VBP; hereinafter VBP). VFP is a waiting time from the end of a frame until the start of a new frame, and VBP may be a waiting time for stabilization before the start of a new frame.

[0084] The Vsync signal (S32) dynamically adjusts the interval between frames when the refresh rate changes; at a low refresh rate, the interval between Vsync signals becomes longer, and at a high refresh rate, the interval becomes shorter.

[0085] The VBlank signal (S33) is a signal indicating a third blank period (T5) in the display, which can define a period in which the display does not transmit pixel data.

[0086] While the VBlank signal (S33) is active, the display stops outputting data, and the touch detection signal (Touch Sync, Touch Tx) can be activated. As the refresh rate changes, the length of the VBlank signal (S33) changes, and the third blank section (T5) capable of detecting touch data can be dynamically adjusted. According to one embodiment of the present invention, in a situation where a hover touch is required, the refresh rate is lowered so that the section of the VBlank signal (S33) and the third blank section (T5) are extended, thereby increasing the time available to detect the hover touch.

[0087] The VBlank signal (S33) can be extended by adjusting the timing parameter of the Vsync signal (S32) in variable refresh rate mode. The VBlank interval can be extended by increasing the VFP and / or VBP values.

[0088] The Touch Sync signal (S24) can synchronize the touch detection timing with the display signal to coordinate the touch signal in the third blank section (T5) and the third display active section (T6). During the third blank section (T5), a Touch Sync signal (S24) for hover touch detection can be generated, and during the third display active section (T6), a Touch Sync signal (S24) for normal touch detection can be generated. When the Variable Refresh Rate (VRR) mode is applied, the Touch Sync signal (S24) can be automatically synchronized according to the change in refresh rate and distributed to the third blank section (T5) and the third display active section (T6).

[0089] The Touch Tx signal (S25) can detect touch data by applying voltage to the Tx electrode of the touch sensor (400) to induce a change in capacitance. In the third blank section (T5), it can operate with high sensitivity to detect a hover touch, and in the third display active section (T6), it can operate to minimize display signal interference to detect a normal touch. Depending on the variable refresh rate (VRR) mode, the active section of the Touch Tx signal (S25) can be dynamically adjusted to the third blank section (T5). If the refresh rate is low and the third blank section (T5) becomes longer, the Touch Tx signal (S25) is activated for a longer period, making hover touch detection more stable.

[0090] It is obvious to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the invention. Accordingly, the foregoing detailed description should not be interpreted restrictively in all respects but should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

[0091] The method according to the above-described embodiment may be produced as a program to be executed on a computer, and the program may be stored on a computer-readable recording medium, examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc., and also includes being implemented in the form of a carrier wave (e.g., transmission over the Internet).

[0092] Computer-readable recording media are distributed across networked computer systems, allowing computer-readable code to be stored and executed in a distributed manner. Furthermore, functional programs, code, and code segments for implementing the above-described method can be easily inferred by programmers skilled in the art to which the embodiments belong.

[0093] It is obvious to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the invention.

[0094] Accordingly, the above detailed description should not be interpreted restrictively in all respects but should be considered exemplary. The scope of the invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

Claims

1. A touch sensor that detects touch data; A touch IC configured to control the above touch sensor; A display driver IC configured to control a display panel; and It includes a touch and display driver integration (hereinafter TDDI) in which the above-mentioned touch IC and the above-mentioned display driver IC are integrated, and A touchscreen display device comprising the touch IC processing the touch data based on display information received from the display driver IC.

2. In Paragraph 1, The above touch sensor is, A touchscreen display device comprising detecting a change in capacitance and transmitting data to the touch IC.

3. In Paragraph 1, The above touch IC is, A touchscreen display device that processes hover touch data in a blank section and normal touch data in a display active section.

4. In Paragraph 3, The above hover touch data is, It includes data detected without direct contact with the touch sensor, and The above normal touch data is, A touchscreen display device comprising data detected by direct contact with the touch sensor.

5. In Paragraph 3, The above blank section is, A touchscreen display device, which is a section where pixel data is not transmitted to the above-mentioned display panel.

6. In Paragraph 1, The above display information is, A touchscreen display device including refresh rate information.

7. In Paragraph 6, The above display driver IC is, A touchscreen display device that varies the blank section based on the above refresh rate information.

8. In Paragraph 7, Varying the above display blank section is, A touchscreen display device capable of varying the vertical front porch (VFP) and / or vertical back porch (VBP) of a vertical sync signal (Vsync) in variable refresh rate (VRR) mode.

9. Step of detecting touch data; A step of receiving and processing the above-mentioned detected touch data; and A method for controlling a touchscreen display device, comprising the step of processing touch data based on display information received from a display driver IC.

10. In Paragraph 9, The step of detecting the above touch data is, A control method for a touchscreen display device, comprising detecting a change in capacitance and transmitting data to a touch IC.

11. In Paragraph 9, A control method for a touchscreen display device, further comprising the step of processing hover touch data in a blank section and processing normal touch data in a display active section.

12. In Paragraph 11, The above hover touch data is, Includes data detected without direct contact with the touch sensor, The above normal touch data is, A method for controlling a touchscreen display device, comprising data detected by direct contact with the touch sensor.

13. In Paragraph 11, The above blank section is, A method for controlling a touchscreen display device, wherein pixel data is not transmitted to the display panel.

14. In Paragraph 9, The above display information is, A method for controlling a touchscreen display device including refresh rate information.

15. In Paragraph 14, The step of processing the touch data based on the display information received from the display driver IC is: A control method for a touchscreen display device comprising the step of varying the blank interval based on the above refresh rate information.

16. In Paragraph 15, Varying the above display blank section is, A control method for a touchscreen display device that can be varied by adjusting the vertical front porch (VFP) and / or vertical back porch (VBP) of a vertical synchronization signal (Vsync) in a variable refresh rate (VRR) mode.

Images