Stretchable touch display device

Abstract

Disclosed is a stretchable touch display device which improves touch performance by eliminating a ghosting touch caused by a change in a shape of a touch panel. A stretchable touch display device includes: a display panel; a touch sensor configured to detect a touch on the display panel; a strain sensor configured to detect a change in a shape of the display panel; and a controller configured to: determine whether there is a change in the shape of the display panel based on a detection signal from the strain sensor; and when it is determined that there is a change in the shape of the display panel, compensating for a change in touch raw data of the touch sensor based on the change in the shape of the display panel.

Description

Technical Field

[0001] The present disclosure relates to a stretchable touch display device. Background Art

[0002] Nowadays, various display devices are used in different fields, including computer monitors, TVs, mobile phones, etc. Types of display devices currently used include organic light emitting display devices (OLEDs) that emit light by themselves, liquid crystal display devices (LCDs) that require a separate light source, etc.

[0003] However, the application range of display devices has become increasingly diverse, and there is a great demand for small personal portable devices. Therefore, a lot of research is being conducted on display devices with a relatively large display area size and reduced volume and weight.

[0004] Stretchable displays have recently attracted attention as next-generation display devices for use in a variety of fields. These devices can be fabricated by forming display cells and wiring on a flexible substrate, making them stretchable and retractable in specific directions and capable of being transformed into a variety of shapes. Such devices could significantly improve the portability and practicality of displays in a variety of settings. Summary of the Invention

[0005] Stretchable display devices can be built into wearable devices. In order to provide such stretchable display devices with a touch-based input solution, it is necessary to determine whether the user inputs a touch and accurately detect the touch coordinates.

[0006] However, in stretchable touch display devices, the shape of the touch panel can change according to the movement of the wearable device. This can cause ghost touches and degrade touch performance.

[0007] An object that the present disclosure aims to achieve is to provide a stretchable touch display device that can eliminate ghost touch caused by changes in the shape of a touch panel to improve touch performance.

[0008] The objects of the present disclosure are not limited to the above-mentioned objects. Other objects and advantages of the present disclosure that are not mentioned can be understood based on the following description and can be more clearly understood based on the embodiments of the present disclosure. In addition, it will be easily understood that the objects and advantages of the present disclosure can be achieved using the devices shown in the claims or their combinations.

[0009] One aspect of the present disclosure provides a stretchable touch display device, comprising: a display panel; a touch sensor configured to detect a touch on the display panel; a strain sensor configured to detect a change in the shape of the display panel; and a controller configured to: determine whether there is a change in the shape of the display panel based on a detection signal from the strain sensor; and when it is determined that there is a change in the shape of the display panel, compensate for a change in touch raw data of the touch sensor based on the change in the shape of the display panel.

[0010] Another aspect of the present disclosure provides a stretchable touch display device, comprising: a display panel, the display panel including a touch sensor for detecting a touch on the display panel and a strain sensor for detecting a change in the shape of the display panel, wherein the display panel operates in a time-sharing manner into a display period for image display and a touch period for touch sensing; and a touch driving circuit, the touch driving circuit being configured to: control the operation of each of the touch sensor and the strain sensor; determine whether there is a change in the shape of the display panel based on a detection signal from the strain sensor; and when it is determined that there is a change in the shape of the display panel, compensate for a change in touch raw data of the touch sensor based on the change in the shape of the display panel.

[0011] According to aspects of a stretchable touch display device, touch performance may be improved by eliminating a ghost touch caused by a change in the shape of a touch panel.

[0012] Furthermore, ghost touches can be eliminated by compensating touch raw data based on changes in the shape of the stretchable touch panel based on detection signals from the strain sensors.

[0013] Furthermore, touch coordinates can be accurately detected by eliminating ghost touches caused by changes in the shape of the stretchable touch panel.

[0014] Effects of the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

[0015] In addition to the above-described effects, specific effects of the present disclosure are described, and specific details for implementing the present disclosure are also described. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a block diagram of a stretchable touch display device according to an embodiment of the present disclosure.

[0017] Figure 2 is an example of a wearable device having a stretchable touch display device built therein according to an embodiment of the present disclosure.

[0018] Figure 3 It shows that according to Figure 2 A graph showing changes in touch raw data as the shape of the display panel changes.

[0019] Figure 4 is a schematic cross-sectional view of a display panel including a strain sensor in a stretchable touch display device according to an embodiment of the present disclosure.

[0020] Figure 5 is a block diagram illustrating an operation of a stretchable touch display device according to an embodiment of the present disclosure.

[0021] Figure 6 is a block diagram illustrating the operation of a stretchable touch display device according to another embodiment of the present disclosure.

[0022] Figure 7 is a timing diagram illustrating a driving method according to the first embodiment in a stretchable touch display device according to an embodiment of the present disclosure.

[0023] Figure 8 is a timing diagram illustrating a driving method according to a second embodiment in a stretchable touch display device according to an embodiment of the present disclosure.

[0024] Figure 9 is a timing diagram illustrating a driving method according to a third embodiment in a stretchable touch display device according to an embodiment of the present disclosure.

[0025] Figure 10 It shows that due to Figure 2 A diagram illustrating compensation for changes in touch raw data caused by changes in the shape of a display panel.

[0026] Figure 11 is a flowchart illustrating an operation of a stretchable touch display device according to an embodiment of the present disclosure.

[0027] Figure 12A yes Figure 11 Timing diagram when the shape of the display panel changes.

[0028] Figure 12B yes Figure 11 This is a timing diagram when the shape of the display panel does not change. DETAILED DESCRIPTION

[0029] The advantages and features of the present disclosure, as well as methods for achieving these advantages and features, will become apparent with reference to the embodiments described in detail later in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but can be implemented in a variety of different forms. Therefore, these embodiments are set forth only to make the present disclosure complete and to fully inform those skilled in the art of the present disclosure of its scope, and the present disclosure is limited only by the scope of the claims.

[0030] For simplicity and clarity of illustration, the elements in the accompanying drawings are not necessarily drawn to scale. The same reference numerals in different figures represent the same or similar elements and therefore perform similar functions. In addition, in order to simplify the description, descriptions and details of well-known steps and elements are omitted. In addition, in the following specific embodiments of the present disclosure, many specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it should be understood that the present disclosure can be practiced without these specific details. In other cases, well-known methods, processes, components and circuits are not described in detail so as not to unnecessarily obscure the various aspects of the present disclosure. Examples of various embodiments are further shown and described below. It should be understood that the description herein is not intended to limit the claims to the specific embodiments described. On the contrary, it is intended to cover alternatives, modifications and equivalents that may be included in the spirit and scope of the present disclosure as defined by the appended claims.

[0031] The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for illustrating the embodiments of the present disclosure are illustrative, and the present disclosure is not limited thereto.

[0032] The terms used herein are only intended to describe the purpose of specific embodiments and are not intended to limit the present disclosure. As used herein, the singular formation "one" and "an" are intended to also include plural formations, unless the context clearly states otherwise. It will be further understood that, when used in this specification, the terms "comprise (comprise)", "comprising (comprising)", "include (include)" and "including (including)" specify the presence of the features, integers, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, operations, elements, parts and / or parts thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. When after an element list, an expression such as "at least one of ... " can modify the entire element list, and may not modify the individual elements of the list. In the interpretation of numerical value, even without its clear description, errors or tolerances therein may also occur.

[0033] Furthermore, it should be understood that when a first element or layer is referred to as being "on" a second element or layer, the first element can be directly disposed on the second element, or can be indirectly disposed on the second element with a third element or layer disposed between the first and second elements or layers. It should be understood that when an element or layer is referred to as being "connected to" or "connected to" another element or layer, it can be directly on, connected to, or connected to the other element or layer, or one or more intervening elements or layers can exist. It should also be understood that when an element or layer is referred to as being "between" two elements or layers, it can be the only element or layer between the two elements or layers, or one or more intervening elements or layers can exist.

[0034] Furthermore, as used herein, when a layer, film, region, plate, etc. is disposed “on” or “on top” of another layer, film, region, plate, etc., the former may be in direct contact with the latter, or yet another layer, film, region, plate, etc. may be disposed between the former and the latter. As used herein, when a layer, film, region, plate, etc. is disposed directly “on” or “on top” of another layer, film, region, plate, etc., the former may be in direct contact with the latter, and yet another layer, film, region, plate, etc. may not be disposed between the former and the latter. Furthermore, as used herein, when a layer, film, region, plate, etc. is disposed “below” or “beneath” another layer, film, region, plate, etc., the former may be in direct contact with the latter, or yet another layer, film, region, plate, etc. may be disposed between the former and the latter. As used herein, when a layer, film, region, plate, etc. is disposed directly “below” or “beneath” another layer, film, region, plate, etc., the former may be in direct contact with the latter, and yet another layer, film, region, plate, etc. may not be disposed between the former and the latter.

[0035] In a description of a temporal relationship, for example, a temporal precedent relationship between two events, such as "after," "after," "before," etc., unless "directly after," "directly after," or "directly before" is not indicated, another event may occur between them.

[0036] When the specific embodiment can be implemented differently, the functions or operations specified in a particular block may occur in an order different from the order specified in the flow chart. For example, two consecutive blocks may actually be executed substantially simultaneously, or the two blocks may be executed in reverse order depending on the functions or operations involved.

[0037] It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, a first element, component, region, layer, or part described below may be referred to as a second element, component, region, layer, or part without departing from the spirit and scope of the present disclosure.

[0038] When the embodiment can be implemented differently, the functions or operations specified in a particular block can be performed in an order different from the order specified in the flow chart. For example, two consecutive blocks can actually be performed substantially at the same time, or the blocks can be performed in a reverse order according to the related functions or operations.

[0039] The features of the various embodiments of the present disclosure may be partially or completely combined with each other, and may be technically related to each other or operate with each other. The embodiments may be implemented independently of each other, and may be implemented together in an associated relationship.

[0040] When interpreting numerical values, the values are interpreted as including the error range unless there is no separate explicit description thereof.

[0041] It will be understood that when an element or layer is referred to as being “connected to” or “connected to” another element or layer, it can be directly on, connected to, or connected to the other element or layer, or one or more intervening elements or layers may be present. Additionally, it will be understood that when an element or layer is referred to as being “between” two elements or layers, it can be the only element or layer between the two elements or layers, or one or more intervening elements or layers may also be present.

[0042] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. It will be further understood that 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 art and will not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0043] As used herein, "embodiment," "example," "aspect," etc. should not be construed to render any aspect or design described preferred or advantageous over other aspects or designs.

[0044] Furthermore, the term "or" means an inclusive or rather than an exclusive or. That is, unless specified otherwise or clear from the context, the expression "x employs a or b" means any of the natural inclusive permutations.

[0045] The terms used in the following description have been selected to be commonly used in the relevant technical fields. However, other terms may exist in accordance with the development and / or changes in technology, conventions, preferences of technicians, etc. Therefore, the terms used in the following description should not be understood as limiting the technical concept, but should be understood as examples of terms used to illustrate the embodiments.

[0046] In addition, in certain cases, the terms may be arbitrarily selected by the applicant, in which case their detailed meanings will be described in the corresponding description section. Therefore, the terms used in the following description should be understood not only based on the names of the terms, but also based on the meanings of the terms and the content of the entire detailed description.

[0047] In the description of a signal flow, for example, when a signal is transmitted from node A to node B, this may include a case where the signal is transmitted from node A to node B via another node unless the phrase “immediately transmitted” or “directly transmitted” is used.

[0048] Throughout this disclosure, unless otherwise stated, "A and / or B" means A, B, or A and B, and unless otherwise stated, "C to D" means C (inclusive) to D (inclusive).

[0049] "At least one" should be understood to include any combination of one or more of the listed components. For example, at least one of the first, second, and third components refers not only to the first, second, or third component, but also to all combinations of two or more of the first, second, and third components.

[0050] Hereinafter, embodiments of the present disclosure will be described using the accompanying drawings. For ease of illustration, the proportions of each component shown in the accompanying drawings are different from their actual proportions, and therefore, the present disclosure is not limited to the proportions shown in the accompanying drawings.

[0051] Hereinafter, a stretchable touch display device according to some embodiments will be described.

[0052] Figure 1 is a block diagram of a stretchable touch display device according to an embodiment of the present disclosure. All components of each stretchable touch display device according to all embodiments of the present disclosure are operatively coupled and configured.

[0053] The stretchable touch display device may include a display panel 100 , a data driving circuit 230 , a gate driving circuit 240 , a power circuit 250 , and a touch driving circuit 300 .

[0054] The display panel 100 may include a touch panel in which touch sensors and / or touch wiring for touch sensing are provided. In this regard, the touch panel may refer to a portion of the display panel 100 including components required for touch sensing, or may refer to a collection of touch sensors and / or touch wiring provided in the display panel 100.

[0055] The display panel 100 may include a strain panel in which a strain sensor for sensing a change in the shape of the display panel 100 is provided. The strain panel may refer to a portion of the display panel 100 including components required to sense a change in the shape of the display panel, or may refer to a collection of strain sensors and / or strain wiring provided in the display panel 100.

[0056] The display panel 100 can be operated in a time-sharing manner, with a display period for image display and a touch period for touch sensing. During the display period, data of an input image can be written to the pixel array. During the touch period, the strain sensor and the touch sensor can be operated to detect the presence or absence of deformation of the display panel and to detect touch input.

[0057] The data driving circuit 230 may drive the data lines S1 to Sm provided in the display panel 100. For example, during a display period, the data driving circuit 230 may provide data voltages to the plurality of sub-pixels SP through the data lines.

[0058] The gate driving circuit 240 may drive the gate lines G1 to Gn provided in the display panel 100. For example, during a display period, the gate driving circuit 240 may provide a scan signal to the plurality of sub-pixels SP through the gate lines.

[0059] During the display period, the power circuit 250 may apply a high potential power voltage and a low potential power voltage to a high potential power terminal and a low potential power terminal of each sub-pixel SP through the power line, respectively.

[0060] During the touch period, the power circuit 250 may apply a strain driving signal and a touch driving signal, each having a specific cycle and a specific amplitude, to the strain sensor and the touch sensor, respectively.

[0061] In addition, the power supply circuit 250 can apply an AC signal having the same period and amplitude as the period and amplitude of the touch drive signal applied to the touch sensor to the high potential power terminal and the low potential power terminal of each sub-pixel through the power line during the touch period, so that the parasitic capacitance between the touch sensor and the power line can be minimized.

[0062] The touch driving circuit 300 may sense whether there is a change in the shape of the display panel 100 using a strain sensor and / or a strain wiring provided in the display panel 100 .

[0063] The touch driving circuit 300 may sense the presence or absence of a user's touch and / or a touch position using a touch sensor and / or a touch wiring provided in the display panel 100 .

[0064] The timing controller 220 can receive timing signals such as a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a data enable signal DE, and a main clock MCLK from the host system 210, and synchronize the operation timings of the data driving circuit 230 and the gate driving circuit 240 with each other based on the received timing signals.

[0065] The host system 210 may be a wearable device with a built-in application. The host system 210 may convert the image data RGB into a format suitable for the resolution of the display panel 100. The host system 210 transmits the timing signals Vsync, Hsync, DE, and MCLK along with the image data RGB to the timing controller 220. In addition, the host system 210 may execute an application related to the coordinate data TDATA of the touch input received from the touch drive circuit 300.

[0066] The timing controller 220 or the host system 210 may generate a synchronization signal Tsync to synchronize the operation timing of each of the data driving circuit 230 , the gate driving circuit 240 , the power supply circuit 250 , and the timing controller 220 with the operation timing of the touch driving circuit 300 .

[0067] The synchronization signal Tsync may be configured to repeat a first period having a first signal level and a second period having a second signal level. In this regard, the first signal level may be higher than the second signal level. In the synchronization signal Tsync, the first period may correspond to the display period Td, and the second period may correspond to the touch period Tt.

[0068] In addition, the synchronization signal Tsync may correspond to a vertical synchronization signal Vsync for display operation. In this case, the display period Td may correspond to an effective period in the vertical synchronization signal Vsync, and the touch period Tt may correspond to a blanking period in the vertical synchronization signal Vsync.

[0069] Figure 2 is an example of a wearable device having a stretchable touch display device built therein according to an embodiment of the present disclosure.

[0070] For workers in special fields (such as firefighters, soldiers and special personnel), using mobile phones or other touch input devices may be difficult. In addition, workers in special fields (such as firefighters, soldiers and special personnel) may need real-time information related to special fields such as fire, combat and other emergencies. In this case, the risks and other dangers they face may be very high. Therefore, workers in special fields may need wearable smart devices with built-in stretchable display devices as real-time information delivery and input devices.

[0071] A stretchable touch display device can be embedded in a wearable device. In such a smart wearable device with a built-in stretchable display device, the shape of the stretchable touch panel can change according to the movement of the wearer's body, such as the user's arm. However, the embodiments of the present disclosure are not limited thereto. For example, when the arm is folded or unfolded, the shape of the hyperbolic surface of the stretchable display panel may change, or the shape of the stretchable display panel may change in various directions. As a result, ghost touches may appear in the touch raw data, thereby reducing the touch performance of the stretchable touch display device.

[0072] refer to Figure 2 , a wearable device having a stretchable touch display device including a display panel 100 can be set on a piece of clothing or clothing, such as a uniform of a worker in a special field, or can be set as a device that can be attached or connected to a uniform, or can be attached or tied to the body of a worker. In various embodiments of the present disclosure, the shape of the wearable device can be elongated, so that the wearable device is longer in a first direction than in a second direction intersecting with the first direction. However, the shape of the wearable device is not limited to this, and other shapes, such as circular, rectangular or other shapes are also possible. In addition, at least a portion of the wearable device can be flexible, so that the wearable device can bend, bend or change shape according to the placement of the wearable device on the worker's clothing or body part. In various embodiments of the present disclosure, the entire wearable device including the stretchable touch display device (including the display panel 100) can be flexible, so that the wearable device can be used in special fields.

[0073] Furthermore, the stretchable touch display device can be used as an input device in conjunction with a separate keyboard or pen, whereby the keyboard or pen can be connected to the stretchable touch display device via a wireless connection such as Bluetooth or via a wired connection. When connected to such an input device, the stretchable touch display device can be used as a dedicated display. However, the embodiments of the present disclosure are not limited thereto.

[0074] Figure 3 It shows that according to Figure 2 A graph showing changes in touch raw data as the shape of the display panel changes.

[0075] The change in touch raw data indicates a change from touch data before the stretchable touch panel is bent to touch data after the stretchable touch panel has been bent.

[0076] Figure 3 The change of the touch raw data caused by the touch is shown, but the change of the touch raw data due to the change of the shape of the display panel is shown, which leads to a ghost phenomenon due to the increase of touch noise.

[0077] Regarding stretchable touch panels, the shape of the stretchable touch panel changes according to the movement of the arm. This change in its shape causes unexpected changes in touch data or touch raw data. Therefore, an object of the present disclosure is to provide a stretchable touch display device that prevents deterioration of touch performance, such as incorrect or unrecognized touch. In this regard, an object of the present disclosure is to provide a stretchable touch display device in which a strain sensor is added to the display panel, and the strain information sensed by the strain sensor is used to eliminate and minimize ghost touches, thereby improving touch performance.

[0078] refer to Figure 3 , the upper view shows a plurality of touch sensors detecting touch values in a non-touch state, wherein the baseline touch value may be within a predetermined range that is not recognized as a touch. Figure 3 As shown in the upper view of FIG, the baseline touch value can range from -5 to +5, so that some basic level noise will not be recognized as a touch. In various embodiments of the present disclosure, the baseline touch value can have a larger range from less than -5 to greater than +5 to provide a robust range for stretchable touch panels used in harsh environments and prevent false touches from being recognized as valid touches. However, the embodiments of the present disclosure are not limited thereto.

[0079] In addition, reference Figure 3 , the lower view shows that some of the multiple touch sensors detect actual touches due to values greater than the baseline touch value, but the touch is an unintended touch (e.g., a ghost touch) caused by bending, flexing, or shape change of the stretchable touch panel. Figure 3 As shown in the lower view of FIG, when the values detected by some of the multiple touch sensors differ from the baseline touch value by a certain amount, or are values outside the baseline touch value range, a touch is detected even if it is an accidental touch. In various embodiments of the present disclosure, an accidental touch is not necessarily caused by a change in the shape of the stretchable touch panel, but may be caused by external factors, such as pressure exerted by water, dirt, or vegetation, which may be inadvertently applied to the stretchable touch panel when workers are out on special sites.

[0080] Figure 4is a schematic cross-sectional view of a display panel including a strain sensor in a stretchable touch display device according to an embodiment of the present disclosure.

[0081] refer to Figure 4 , the display panel 100 may include a stretchable strain panel 110 , a stretchable display panel 120 and a stretchable touch panel 130 .

[0082] The stretchable strain panel 110 includes a plurality of strain sensors and may be formed on a substrate of the display panel 100. For example, the strain sensors may be implemented as strain sensors of various known schemes, but the embodiments of the present disclosure are not limited thereto.

[0083] The stretchable display panel 120 includes a plurality of sub-pixels and may be formed on the stretchable strain panel 110 .

[0084] The stretchable touch panel 130 includes a plurality of touch sensors and may be formed on the stretchable display panel 120. In this regard, each of the plurality of touch sensors may be implemented as a touch sensor of an in-cell scheme or a touch sensor of an add-on scheme.

[0085] Figure 4 The stretchable strain panel 110 is shown as being formed below the stretchable display panel 120. However, embodiments of the present disclosure are not limited thereto. The stretchable strain panel 110 may be formed on top of the stretchable display panel 120 or on top of the stretchable touch panel 130. Alternatively, the stretchable strain panel 110 may be built into the stretchable display panel 120 in the form of a sensor. However, embodiments of the present disclosure are not limited thereto.

[0086] refer to Figure 4 The arrangement and / or form of the stretchable strain panel 110, the stretchable display panel 120, and the stretchable touch panel 130 may vary. For example, the stretchable strain panel 110 may be located between the stretchable touch panel 130 and the stretchable display panel 120. In addition, the stretchable strain panel 110 may be built into the stretchable touch panel 130 in the form of a sensor. In addition, the stretchable touch panel 130 may be formed in the stretchable display panel 120.

[0087] When the stretchable touch panel 130 is formed in the stretchable strain panel 110 or the stretchable display panel 120, the multiple touch sensors of the stretchable touch panel 130 and the multiple strain sensors of the stretchable strain panel 110 may be coplanar. When coplanar, the multiple touch sensors and the multiple strain sensors may intersect with each other or be arranged in alternating rows and / or columns. However, the embodiments of the present disclosure are not limited thereto.

[0088] Furthermore, when the stretchable touch panel 130 is formed in the stretchable display panel 120, the plurality of touch sensors of the stretchable touch panel 130 and the plurality of sub-pixels of the stretchable display panel 120 may be coplanar. When coplanar, the plurality of touch sensors and the plurality of sub-pixels may intersect with each other or may be arranged in alternating rows and / or columns. However, the embodiments of the present disclosure are not limited thereto.

[0089] In other embodiments of the present disclosure, the stretchable strain panel 110 , the stretchable display panel 120 , and the stretchable touch panel 130 may be formed together, for example, in a coplanar structure.

[0090] In various embodiments of the present disclosure, the correspondence between the multiple strain sensors of the stretchable strain panel 110, the multiple sub-pixels on the stretchable display panel 120, and the multiple touch sensors of the stretchable touch panel 130 can vary. For example, the ratio of the multiple strain sensors, the multiple sub-pixels, and the multiple touch sensors can be defined as A:B:C, and A, B, and C can each be 1, so that their correspondence can be 1:1:1. However, the embodiments of the present disclosure are not limited to this. For example, the number of multiple sub-pixels can be greater than the number of multiple touch sensors and / or multiple strain sensors, so that the ratio is 1:4:1. Other ratios are also possible, for example, such as 1:2:3, 3:2:1, 2:4:2. In various embodiments of the present disclosure, each of A, B, and C can be a number from 1 to 100.

[0091] Figure 5 is a block diagram illustrating an operation of a stretchable touch display device according to an embodiment of the present disclosure.

[0092] The stretchable touch display device includes a display panel 100 and a touch driving circuit 300 .

[0093] The display panel 100 includes a strain sensor 112 for detecting a change in the shape of the display panel and a touch sensor 132 for detecting a touch on the display panel.

[0094] The touch driving circuit 300 may be configured to compensate for a change in touch raw data based on strain information sensed using the strain sensor 1120 , thereby eliminating a ghost touch.

[0095] In one example, the touch driving circuit 300 may be configured to include a main controller 310 and a slave controller 320. The main controller 310 is configured to drive the touch sensor 132 and generate an enable signal for enabling the strain sensor 112 in response to a synchronization signal Tsync indicating a display period or a touch period, and the slave controller 320 is configured to drive the strain sensor 112 in response to the enable signal provided from the main controller 310. In this regard, the synchronization signal Tsync may correspond to the vertical synchronization signal Vsync.

[0096] Figure 6 is a block diagram illustrating the operation of a stretchable touch display device according to another embodiment of the present disclosure.

[0097] In another example, the touch driving circuit 300 may include a controller 310 configured to drive the touch sensor 132 and the strain sensor 112 in response to a synchronization signal Tsync indicating a display period or a touch period.

[0098] The controller 310 may determine whether the shape of the display panel 100 has changed based on the detection signal from the strain sensor 112. When it is determined that the shape of the display panel 100 has changed, the controller 310 may compensate for the change in the touch raw data of the touch sensor 132 caused by the change in the shape of the display panel 100 based on the change in the shape of the display panel 100.

[0099] In addition, when there is a change in the shape of the display panel 100, the controller 310 may update the value of the strain baseline based on the detection signal of the strain sensor 112. In this regard, the value of the strain baseline may be used as reference data before a touch on the display panel 100 to determine the presence or absence of a touch and the touch coordinates.

[0100] Figure 7 is a timing diagram illustrating a driving method according to the first embodiment in a stretchable touch display device according to an embodiment of the present disclosure.

[0101] refer to Figure 7 , the stretchable touch display device may operate the display panel 100 in a time-division manner into a display period Td for image display and a touch period Tt for touch sensing based on the synchronization signal Vsync.

[0102] In response to the synchronization signal Vsync, the controller 310 may simultaneously enable the strain sensor 112 and the touch sensor 132 by setting the strain enable signal to a low logic level during the touch period Tt.

[0103] The controller 310 may simultaneously drive the strain sensor 112 and the touch sensor 132 by applying a strain driving signal and a touch driving signal, each having a specific cycle and a specific amplitude, to the strain sensor 112 and the touch sensor 132 , respectively, for a specific period of time.

[0104] Figure 8 is a timing diagram illustrating a driving method according to a second embodiment in a stretchable touch display device according to an embodiment of the present disclosure.

[0105] refer to Figure 8 , the stretchable touch display device may operate the display panel 100 in a time-division manner into a display period Td for image display and a touch period Tt for touch sensing based on the synchronization signal Vsync.

[0106] In response to the synchronization signal Vsync, the controller 310 may enable the touch sensor 132 during a first portion of the touch period Tt, and then enable the strain sensor 112 by setting the strain enable signal to a low logic level during a second portion of the touch period Tt.

[0107] During the touch period Tt, the controller 310 can be configured to first drive the touch sensor 132 by applying a touch drive signal having a specific period and a specific amplitude to the touch sensor 132, and then drive the strain sensor 112 by applying a strain drive signal having the same period and amplitude as the touch drive signal to the strain sensor 112.

[0108] Figure 9 is a timing diagram illustrating a driving method according to a third embodiment in a stretchable touch display device according to an embodiment of the present disclosure.

[0109] refer to Figure 9 , the stretchable touch display device may operate the display panel 100 in a time-division manner into a display period Td for image display and a touch period Tt for touch sensing based on the synchronization signal Vsync.

[0110] During the display period Td, the controller 310 may enable the strain sensor 112 in response to the synchronization signal Vsync by setting the strain enable signal to a low logic level for a portion of the duration within the display period Td. Then, during the touch period Tt, the controller 310 may enable the touch sensor 132 in response to the synchronization signal Vsync.

[0111] The controller 310 can drive the strain sensor 112 by applying a strain drive signal having a specific period and a specific amplitude to the strain sensor 112 during the display period Td, and then drive the touch sensor 132 by applying a touch drive signal having the same period and amplitude as the strain drive signal to the touch sensor 132 during the touch period Tt. However, the embodiments of the present disclosure are not limited thereto, and the period and amplitude of the touch drive signal and the strain drive signal do not need to be the same and can be different from each other. For example, the period and / or amplitude of the strain drive signal can be greater than the period and / or amplitude of the touch drive signal, and vice versa.

[0112] In such Figures 7 to 9 In the embodiment shown, the time-sharing scheme can be implemented as follows: the controller can set the strain enable signal to a low logic level during the touch period Tt, so that the controller can drive the touch sensor 132 and the strain sensor 112 at the same time; alternatively, the controller can first drive one of the touch sensor 132 or the strain sensor 112, and then drive the other of the touch sensor 132 or the strain sensor 112; alternatively, the controller can set the strain enable signal to a low logic level during the display period Td, so that the controller can drive the strain sensor 112; alternatively, the controller can enable the touch sensor 132 in response to the synchronization signal Vsync during the touch period Tt. In addition, the touch drive signal and the strain drive signal can be as shown in FIG. Figure 7 As shown, it is completely overlapped, or it can be Figure 8 and Figure 9 However, the embodiments of the present disclosure are not limited thereto. For example, the touch drive signal and the strain drive signal may partially overlap. In addition, the overlap of the strain enable signal with one or more of the touch drive signal and the strain drive signal may be completely overlapped, such as Figure 7 As shown. With respect to the overlap of the strain drive signal and the strain enable signal, the overlap can be exact (see Figure 8 ), or it can be complete (see Figure 7 and Figure 9 ), wherein the time period of the strain enable signal is greater than the time period of the strain drive signal.

[0113] Figure 10 It shows that due to Figure 2 A diagram illustrating compensation for changes in touch raw data caused by changes in the shape of a display panel.

[0114] To eliminate ghost touches that occur when a stretchable touch panel bends, the strain sensor's detection results can be used to compensate for changes in touch raw data caused by changes in the touch panel's shape. This stabilizes the touch raw data values and eliminates ghost touches caused by changes in panel shape. Figure 10 The values of touch raw data from which ghost touches have been eliminated by applying compensation thereto are shown.

[0115] Figure 11 is a flowchart illustrating an operation of a stretchable touch display device according to an embodiment of the present disclosure.

[0116] refer to Figure 11 The stretchable touch display device may be powered on at S31, and then enable the strain sensor at S32. Then, at S33, it may be determined whether the shape of the display panel 100 has changed based on a detection signal from the strain sensor.

[0117] When there is a change in the shape of the display panel 100 , the stretchable touch display device can compensate for a change in touch raw data of the touch sensor 132 caused by the change in the shape of the display panel 100 .

[0118] For example, at S34, the stretchable touch display device may drive the strain sensor when the shape of the display panel changes, and may receive a detection signal from the strain sensor according to the change in the shape of the display panel. Then, at S35, the stretchable touch display device may update the value of the strain baseline serving as reference data before the touch on the display panel 100 based on the detection signal from the strain sensor. However, embodiments of the present disclosure are not limited thereto.

[0119] When the shape of the display panel 100 changes, the stretchable touch display device may update the value of the strain baseline at S36 and then drive the touch sensor to perform touch sensing. Alternatively, when the shape of the display panel does not change, the stretchable touch display device may perform touch sensing by driving the touch sensor 132 without driving the strain sensor 112 at S36.

[0120] In other embodiments of the present disclosure, touch sensing at S36 may occur before strain sensing at S32 and / or strain sensing at S34. When touch sensing occurs before strain sensing, touch data may be stored or buffered in a memory or buffer until strain sensing is performed.

[0121] Then, at S37 , the stretchable touch display device may execute a preset touch algorithm, and at S38 , may calculate touch coordinates using the touch algorithm.

[0122] Figure 12A yes Figure 11 Timing diagram when the shape of the display panel changes.

[0123] refer to Figure 12A When there is a shape change in the display panel 100, the stretchable touch display device can drive the strain sensor 112 by applying a strain driving signal having a specific period and a specific amplitude to the strain sensor 112 in synchronization with setting the strain enable signal to a low logic level during the touch period Tt, and then, after driving the strain sensor 112, the touch sensor 132 can be driven by applying a touch driving signal having a specific period and a specific amplitude to the touch sensor 132 in synchronization with the touch enable signal during the touch period Tt.

[0124] Figure 12B yes Figure 11 This is a timing diagram when the shape of the display panel does not change.

[0125] refer to Figure 12B When the shape of the display panel 100 does not change, the stretchable touch display device can drive the touch sensor 132 by applying a touch driving signal having a specific period and a specific amplitude to the touch sensor 132 in synchronization with the synchronization signal Vsync during the touch period Tt, without driving the strain sensor 112.

[0126] The timing at which the strain sensor 112 performs sensing and the timing at which the touch sensor 132 performs sensing may be allocated in a time-sharing manner or may be variable.

[0127] According to the above-described embodiments, touch performance can be improved by eliminating ghost touches caused by changes in the shape of a touch panel.

[0128] Furthermore, ghost touches can be eliminated by compensating touch raw data based on changes in the shape of the stretchable touch panel based on detection signals from the strain sensors.

[0129] Furthermore, touch coordinates can be accurately detected by eliminating ghost touches caused by changes in the shape of the stretchable touch panel.

[0130] The stretchable touch display device according to various aspects and embodiments of the present disclosure may be described as follows.

[0131] A first aspect of the present disclosure provides a stretchable touch display device, comprising: a display panel; a touch sensor configured to detect a touch on the display panel; a strain sensor configured to detect a change in the shape of the display panel; and a controller configured to: determine whether there is a change in the shape of the display panel based on a detection signal from the strain sensor; and when it is determined that there is a change in the shape of the display panel, compensate for a change in touch raw data of the touch sensor based on the change in the shape of the display panel.

[0132] According to some embodiments of the first aspect of the stretchable touch display device, when power is supplied to the device, the controller is configured to enable the strain sensor to detect whether there is a change in the shape of the display panel.

[0133] According to some embodiments of the first aspect of the stretchable touch display device, when it is determined that there is a change in the shape of the display panel, the controller is configured to update the value of the strain baseline based on the detection signal from the strain sensor, wherein the value of the strain baseline is used as reference data as a reference value before the touch on the display panel.

[0134] According to some embodiments of the first aspect of the stretchable touch display device, when it is determined that there is a change in the shape of the display panel, the controller is configured to update the value of the strain baseline and then drive the touch sensor.

[0135] According to some embodiments of the first aspect of the stretchable touch display device, when it is determined that the shape of the display panel has not changed, the controller is configured to drive the touch sensor instead of driving the strain sensor.

[0136] According to some embodiments of the first aspect of the stretchable touch display device, the display panel operates in a time-sharing manner into a display period for image display and a touch period for touch sensing, wherein the controller is configured to simultaneously enable both the strain sensor and the touch sensor during the touch period.

[0137] According to some embodiments of the first aspect of the stretchable touch display device, the display panel operates in a time-sharing manner into a display period for image display and a touch period for touch sensing, wherein, during the touch period, the controller is configured to enable the touch sensor in a first part of the touch period and then enable the strain sensor in a latter part of the contact period.

[0138] According to some embodiments of the first aspect of the stretchable touch display device, the display panel operates in a time-sharing manner into a display period for image display and a touch period for touch sensing, wherein the controller is configured to enable the strain sensor during a partial duration of the display period and to enable the touch sensor during the touch period.

[0139] According to some embodiments of the first aspect of the stretchable touch display device, the display panel includes: a stretchable strain panel, the stretchable strain panel including a strain sensor; a stretchable display panel, the stretchable display panel formed on the stretchable strain panel; and a stretchable touch panel, the stretchable touch panel formed on the stretchable display panel and including the touch sensor.

[0140] A second aspect of the present disclosure provides a stretchable touch display device, comprising: a display panel, the display panel including a touch sensor for detecting a touch on the display panel and a strain sensor for detecting a change in the shape of the display panel, wherein the display panel operates in a time-sharing manner into a display period for image display and a touch period for touch sensing; and a touch drive circuit, the touch drive circuit being configured to: control the operation of each of the touch sensor and the strain sensor; determine whether there is a change in the shape of the display panel based on a detection signal from the strain sensor; and when it is determined that there is a change in the shape of the display panel, compensate for a change in touch raw data of the touch sensor based on the change in the shape of the display panel.

[0141] According to some embodiments of the second aspect of the stretchable touch display device, the touch drive circuit includes: a main controller, which is configured to drive the touch sensor and generate an enable signal to enable the strain sensor in response to a synchronization signal indicating the display period or the touch period; and a slave controller, which is configured to drive the strain sensor in response to the enable signal.

[0142] According to some embodiments of the second aspect of the stretchable touch display device, the touch driving circuit includes a controller configured to drive the touch sensor and the strain sensor in response to a synchronization signal indicating the display period or the touch period.

[0143] According to some embodiments of the second aspect of the stretchable touch display device, when it is determined that there is a change in the shape of the display panel, the touch drive circuit is configured to update the value of the strain baseline based on the detection signal from the strain sensor, wherein the value of the strain baseline is used as reference data as a reference value before the touch on the display panel.

[0144] According to some embodiments of the second aspect of the stretchable touch display device, when it is determined that there is a change in the shape of the display panel, the touch driving circuit is configured to update the value of the strain baseline and then drive the touch sensor.

[0145] According to some embodiments of the second aspect of the stretchable touch display device, when it is determined that the shape of the display panel has not changed, the touch driving circuit is configured to drive the touch sensor instead of driving the strain sensor.

[0146] According to some embodiments of the second aspect of the stretchable touch display device, the touch driving circuit is configured to simultaneously enable both the strain sensor and the touch sensor during the touch period.

[0147] According to some embodiments of the second aspect of the stretchable touch display device, the touch driving circuit is configured to enable the touch sensor and the strain sensor in a time-sharing manner during the touch period.

[0148] According to some embodiments of the second aspect of the stretchable touch display device, the touch drive circuit is configured to enable the strain sensor during a partial duration of the display period and enable the touch sensor during the touch period.

[0149] A third aspect of the present invention provides a stretchable touch display device, comprising: a display panel; a touch sensor configured to detect a touch on the display panel; a strain sensor configured to detect a change in shape of the display panel; and a controller configured to: determine whether there is a change in the shape of the display panel based on a detection signal from the strain sensor; and update a baseline of the touch sensor when it is determined that there is a change in the shape of the display panel.

[0150] According to some embodiments of the second aspect of the stretchable touch display device, the baseline is reference data before the shape of the display panel is changed.

[0151] Although the embodiments of the present disclosure have been described with reference to the accompanying drawings, the present disclosure is not limited to the above-described embodiments, but can be implemented in various forms. It will be understood by those skilled in the art that the present disclosure can be practiced in other specific forms without changing the technical spirit or basic features of the present disclosure. Therefore, it should be understood that the embodiments described above are not restrictive in all aspects but illustrative.

Claims

1. A stretchable touch display device, comprising: Display panel; a touch sensor configured to detect a touch on the display panel; a strain sensor configured to detect a change in a shape of the display panel; as well as A controller configured to: determining whether a shape of the display panel has changed based on a detection signal from the strain sensor; as well as When it is determined that there is a change in the shape of the display panel, a change in touch raw data of the touch sensor is compensated based on the change in the shape of the display panel.

2. The stretchable touch display device according to claim 1, wherein: When power is supplied to the stretchable touch display device, the controller is configured to enable the strain sensor to detect whether there is a change in the shape of the display panel.

3. The stretchable touch display device according to claim 2, wherein: When it is determined that there is a change in the shape of the display panel, the controller is configured to update the value of the strain baseline based on the detection signal from the strain sensor. The value of the strain baseline is used as reference data before a touch on the display panel.

4. The stretchable touch display device according to claim 3, wherein: When it is determined that there is a change in the shape of the display panel, the controller is configured to update the value of the strain baseline and then drive the touch sensor.

5. The stretchable touch display device according to claim 3, wherein: When it is determined that the shape of the display panel has not changed, the controller is configured to drive the touch sensor instead of driving the strain sensor.

6. The stretchable touch display device according to claim 1, wherein: The display panel is operated in a time-division manner into a display period for image display and a touch period for touch sensing, and The controller is configured to enable both the strain sensor and the touch sensor during the touch period.

7. The stretchable touch display device according to claim 1, wherein: The display panel is operated in a time-division manner into a display period for image display and a touch period for touch sensing, and During the touch period, the controller is configured to enable the touch sensor in a first portion of the touch period and then enable the strain sensor in a second portion of the touch period.

8. The stretchable touch display device according to claim 1, wherein: The display panel is operated in a time-division manner into a display period for image display and a touch period for touch sensing, and The controller is configured to enable the strain sensor during a partial duration of the display period and enable the touch sensor during the touch period.

9. The stretchable touch display device according to claim 1, wherein: The display panel includes: a stretchable strain panel, the stretchable strain panel comprising a strain sensor; a stretchable display panel, the stretchable display panel being on the stretchable strain panel; and A stretchable touch panel is on the stretchable display panel and includes the touch sensor.

10. A stretchable touch display device, comprising: a display panel comprising a touch sensor configured to detect a touch on the display panel and a strain sensor configured to detect a change in shape of the display panel, wherein the display panel operates in a time-sharing manner into a display period for image display and a touch period for touch sensing; and A touch driving circuit, wherein the touch driving circuit is configured as follows: controlling operation of each of the touch sensor and the strain sensor; determining whether there is a change in the shape of the display panel based on a detection signal from the strain sensor; and When it is determined that there is a change in the shape of the display panel, a change in the touch raw data of the touch sensor is compensated based on the change in the shape of the display panel.

11. The stretchable touch display device according to claim 10, wherein: The touch driving circuit includes: a main controller configured to drive the touch sensor and generate an enable signal for enabling the strain sensor in response to a synchronization signal indicating the display period or the touch period; and A slave controller is configured to drive the strain sensor in response to the enable signal.

12. The stretchable touch display device according to claim 10, wherein: The touch driving circuit includes a controller configured to drive the touch sensor and the strain sensor in response to a synchronization signal indicating the display period or the touch period.

13. The stretchable touch display device according to claim 10, wherein: When it is determined that there is a change in the shape of the display panel, the touch driving circuit is configured to update the value of the strain baseline based on the detection signal from the strain sensor, and The value of the strain baseline is used as reference data before a touch on the display panel.

14. The stretchable touch display device according to claim 13, wherein: When it is determined that there is the change in the shape of the display panel, the touch driving circuit is configured to update the value of the strain baseline and then drive the touch sensor.

15. The stretchable touch display device according to claim 13, wherein: When it is determined that the shape of the display panel has not changed, the touch driving circuit is configured to drive the touch sensor instead of driving the strain sensor.

16. The stretchable touch display device according to claim 10, wherein: The touch drive circuit is configured to simultaneously enable both the strain sensor and the touch sensor during the touch period.

17. The stretchable touch display device according to claim 16, wherein: The touch driving circuit is configured to enable the touch sensor and the strain sensor in a time-sharing manner during the touch period.

18. The stretchable touch display device according to claim 10, wherein: The touch drive circuit is configured to enable the strain sensor during a portion of the display period and enable the touch sensor during the touch period.

19. A stretchable touch display device, comprising: Display panel; a touch sensor configured to detect a touch on the display panel; a strain sensor configured to detect a change in a shape of the display panel; as well as A controller configured to: determining whether a shape of the display panel has changed based on a detection signal from the strain sensor; as well as When it is determined that there is a change in the shape of the display panel, a baseline of the touch sensor is updated. 20 . The stretchable touch display device according to claim 19 , wherein the baseline is reference data before the change in the shape of the display panel.

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