Display panel, display device including the same, and method of driving the display device

Abstract

This disclosure relates to a display panel, a display device including the display panel, and a method for driving the display device. More specifically, it relates to a display panel, a display device including the display panel, and a method for driving the display device, wherein the display panel reflects the characteristics of adjacent pixels in a correction value and drives multiple reference voltage lines respectively. To this end, according to the display panel of this disclosure, by arranging switching units connected to a first reference voltage line and a second reference voltage line, the characteristics of a sub-pixel of a first pixel and a second pixel located adjacent to the first pixel are selectively sensed, and the path along which the reference voltage is transmitted to one of the first and second reference voltage lines is switched in a non-display area to drive the first and second reference voltage lines respectively, allowing for the sharing of a source driver IC and reducing costs.

Description

Technical Field

[0001] This disclosure relates to a display device, and more specifically, to a display panel, a display device including the display panel, and a driving method for the display device, wherein the display panel reflects the characteristics of adjacent pixels in a compensation value and drives multiple reference voltage lines respectively. Background Technology

[0002] Display devices used in computer monitors, televisions, mobile phones, etc., include self-emissive organic light-emitting diode (OLED) displays and liquid crystal display (LCD) devices that require a separate light source.

[0003] Among various display devices, OLED display devices include a display panel comprising multiple pixels and a driving unit for driving the display panel. The driving unit includes a gating driver that provides gating signals to the display panel and a data driver that provides data voltages. When signals such as gating signals and data voltages are provided to the sub-pixels included in each pixel of the OLED display device, the selected sub-pixels emit light to display an image.

[0004] The descriptions provided in the discussion of the related art section should not be considered prior art solely because they are mentioned in or associated with that section. The discussion of the related art section may include information describing one or more aspects of the subject art, and the descriptions in that section do not limit this disclosure. Summary of the Invention

[0005] In traditional display devices, when operating using single-rate driving (SRD) or dual-rate driving (DRD) methods, there are problems such as different drive sensing ratios and the inability to share source driver ICs due to compensation of the driving transistors and increased visibility of the light-emitting elements.

[0006] Furthermore, in conventional display devices, when the reference voltage line has a bundle structure during SRD or DRD driving, the compensation time increases, and image quality deteriorates due to defects in the reference voltage line.

[0007] Furthermore, in conventional display devices, during SRD or DRD driving, there is a possibility that the bezel of the data pad portion may increase due to data linking.

[0008] Therefore, the inventors of this disclosure have invented a display panel that can share a source driver IC by arranging switches in the non-pad portion to switch sensing channels, thereby making the ratio of drive lines and sensing lines the same during DRD driving, and improving image quality by driving the reference voltage lines separately.

[0009] Furthermore, this disclosure aims to provide a display panel and a display device including the display panel, wherein at least one switch is provided on the display panel to selectively sense the characteristics of one of a first pixel and a second pixel.

[0010] Furthermore, this disclosure aims to provide a display panel and a display device including the display panel, wherein at least one switch is provided on the display panel, which switches the path along which a reference voltage is transmitted to one of the first reference voltage lines and the second reference voltage line, so as to drive the first reference voltage line and the second reference voltage line respectively.

[0011] Furthermore, this disclosure aims to provide a display panel and a display device including the display panel, wherein at least one switch is arranged in the non-pad portion to prevent the bezel of the data pad portion from increasing.

[0012] Furthermore, this disclosure aims to provide a display panel and a display device including the display panel, the display panel including a switching portion, which includes a sensing switch for selectively sensing the characteristics of one of the first pixel and the second pixel, and a driving switch for driving the first reference voltage line and the second reference voltage line respectively.

[0013] Furthermore, this disclosure aims to provide a display panel, a display device including the display panel, and a driving method for the display device. The display panel includes a switch that switches to an off state to apply the characteristics of a first pixel as a compensation value for a second pixel, and switches to an on state to transmit a reference voltage to a first reference voltage line and a second reference voltage line.

[0014] The purpose of this disclosure is not limited to the above-described purposes, and other purposes and advantages not mentioned in this disclosure can be understood through the following description and will become clearer through embodiments of this disclosure. Furthermore, it will be readily apparent that the purposes and advantages of this disclosure can be achieved through the means and combinations thereof described in the claims.

[0015] A display panel according to an example embodiment of the present disclosure includes a switching unit comprising at least one switch connected to a first reference voltage line and a second reference voltage line and selectively sensing characteristics of one of the first and second pixels.

[0016] Furthermore, a display panel according to an example embodiment of the present disclosure includes a switching unit comprising a sensing switch that selectively senses the characteristics of adjacent pixels and a driving switch that performs switching to drive a reference voltage line respectively.

[0017] Furthermore, a display panel according to an example embodiment of this disclosure includes a sensing switch that remains in an off state, thereby applying the characteristics of a first pixel to a compensation value of a second pixel located in an adjacent position.

[0018] Furthermore, a display panel according to an example embodiment of the present disclosure includes a sensing switch that switches on when a characteristic of a first pixel is defective, thereby transmitting a reference voltage to a first reference voltage line and a second reference voltage line.

[0019] Furthermore, a display panel according to an example embodiment of this disclosure includes a drive switch that switches from on to off when a sensing switch switches from off to on.

[0020] Furthermore, a display panel according to an example embodiment of this disclosure includes a switch unit disposed in a non-display area.

[0021] Furthermore, a display panel according to an example embodiment of the present disclosure includes: a sensing line that transmits a sensing signal for sensing characteristics of a first pixel to a sensing switch; and a driving line that transmits a driving signal for driving a first reference voltage line and a second reference voltage line to a driving switch, respectively.

[0022] Furthermore, a display device according to an example embodiment of the present disclosure includes a display panel that includes a switch that selectively senses the characteristics of one of the first and second pixels and drives the first and second reference voltage lines, respectively.

[0023] Furthermore, a driving method for a display device according to an example embodiment of the present disclosure includes the following process: performing a switching to selectively sense the characteristics of a sub-pixel of one of the first and second pixels of the display panel, and driving a first reference voltage line and a second reference voltage line respectively, thereby transmitting a reference voltage to one of the first and second reference voltage lines.

[0024] According to an exemplary embodiment of this disclosure, a source driver IC can be shared by selectively sensing the characteristics of one of the first pixel and the second pixel and providing at least one switch for driving a reference voltage line respectively.

[0025] Furthermore, according to an exemplary embodiment of this disclosure, by sensing the characteristics of a first sub-pixel of a first pixel via a sensing switch and reflecting the sensed characteristics in the compensation value of a first sub-pixel of a second pixel, the source driver IC can be shared and costs reduced while the number of sensing channels is reduced.

[0026] Furthermore, according to an exemplary embodiment of this disclosure, by designing the two reference voltage lines as a single bundle structure via a drive switch, and by switching the path along which the reference voltage is transmitted to one of the first reference voltage lines disposed in the first pixel and the second reference voltage line disposed in the second pixel, the compensation time can be shortened and the image quality improved.

[0027] Furthermore, according to an exemplary embodiment of this disclosure, by arranging a switch portion including at least one sensing switch and at least one driving switch in a non-display area (e.g., a border area or edge area), an increase in the border width of the data pad portion can be prevented.

[0028] Furthermore, according to an example embodiment of this disclosure, power consumption can be reduced by sensing the characteristics of a first sub-pixel of a first pixel and reflecting them in the compensation value of a first sub-pixel of a second pixel adjacent to the first pixel.

[0029] The effects of this disclosure are not limited to those described above, and those skilled in the art will be able to clearly understand other effects not described based on the following description.

[0030] It should be understood that the foregoing general description and the following detailed description of this disclosure are exemplary and illustrative, and are intended to provide further explanation of the claimed disclosure. Attached Figure Description

[0031] The accompanying drawings are included to provide a further understanding of this disclosure and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings:

[0032] Figure 1 This is a schematic diagram of a display device according to an exemplary embodiment of the present disclosure.

[0033] Figure 2 This is a circuit diagram of a sub-pixel of a display device according to an example embodiment of the present disclosure.

[0034] Figure 3 A compensation circuit for a display device 100 according to an embodiment of the present disclosure is shown.

[0035] Figure 4 This is a first exemplary view illustrating a driving method for a display panel according to an example embodiment of the present disclosure.

[0036] Figure 5 This is a second exemplary view illustrating a driving method for a display panel according to an example embodiment of the present disclosure.

[0037] Figure 6 This is a third exemplary view illustrating a driving method for a display panel according to an example embodiment of the present disclosure.

[0038] Figure 7 Is shown as added Figure 5 A fourth exemplary view of the multiple switching elements M1 and M2 in the driving method of the display panel.

[0039] Figure 8 This is a fifth exemplary view illustrating a driving method for a display panel according to an example embodiment of the present disclosure.

[0040] Figure 9 This is a circuit diagram of a first sub-pixel and a second sub-pixel that compensate for the characteristics of a second sub-pixel by means of a first sub-pixel, according to an exemplary embodiment of the present disclosure.

[0041] Figure 10 It is used to describe Figure 9 Timing diagram driven by the sensor of the pixels.

[0042] Figure 11 This is a circuit diagram illustrating additional sensing of a second sub-pixel after the characteristics of the first sub-pixel have been compensated for by the characteristics of the second sub-pixel, according to an example embodiment of the present disclosure.

[0043] Figure 12 It is used for explanation Figure 11 Timing diagram driven by the sensor of the pixels.

[0044] Figure 13 This is a circuit diagram of an exemplary embodiment of the present disclosure for driving the first reference voltage line Ref.1(A) and the first reference voltage line Ref.1(B) respectively when the characteristics of the first sub-pixel are defective.

[0045] Figure 14 It is used to describe Figure 13 Timing diagram driven by the sensor of the pixels.

[0046] Figure 15 This is a flowchart illustrating a process of compensating for subpixel mobility and image quality by turning on a sensing switch after the display panel is powered on, according to an example embodiment of the present disclosure.

[0047] Figure 16 This is a flowchart illustrating a process of real-time compensation of mobility and image quality by turning on a sensing switch while driving a display panel, according to an example embodiment of the present disclosure.

[0048] Figure 17This is a flowchart illustrating a process for compensating for the threshold voltage of subpixels and image quality after a power outage of a display panel, according to an example embodiment of the present disclosure.

[0049] Figure 18 This is a flowchart illustrating a process for compensating for subpixel mobility and image quality by turning on a sensing switch of the display panel and turning off a driving switch of the display panel according to an exemplary embodiment of the present disclosure.

[0050] Figure 19 This is a flowchart illustrating a process of real-time compensation of mobility and image quality by turning on a sensing switch while driving a display panel, according to an example embodiment of the present disclosure.

[0051] Figure 20 This is a flowchart illustrating a process for compensating for the threshold voltage of subpixels and image quality after a power outage of a display panel, according to an example embodiment of the present disclosure.

[0052] Throughout the accompanying drawings and detailed description, unless otherwise stated, the same reference numerals should be understood to denote the same elements, features, and structures. For purposes of clarity, illustration, and convenience, the relative dimensions and descriptions of these elements may be exaggerated.

[0053] Explanation of reference numerals in the attached figures

[0054] 100: Display device; 110: Display panel

[0055] 120: Data driver; 130: Strobe driver

[0056] 140: Timing controller; 150: Light-emitting element

[0057] PX: Light-emitting element; SP: Subpixel

[0058] R: First subpixel W: Second subpixel

[0059] B: Third subpixel; G: Fourth subpixel

[0060] DL: Data cable; GL: Strobe cable

[0061] DA: Display area; NDA: Non-display area Detailed Implementation

[0062] Description of embodiments of the present disclosure will now be given in detail, examples of which are illustrated in the accompanying drawings. The progression of the described processing steps and / or operations is illustrative; however, the order of the steps and / or operations is not limited to the order set forth herein and can be varied as is known in the art, except for steps and / or operations that must occur in a specific order. The names of the various elements used in the following description may have been chosen merely for convenience in writing the specification and may therefore differ from the names used in actual products.

[0063] The advantages and features of this disclosure and its implementation methods will become clear from the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed below, but can be implemented in various different forms. These exemplary embodiments are only intended to complete the disclosure and fully inform those skilled in the art of its scope, and this disclosure is limited only by the scope of the appended claims.

[0064] In this disclosure, when adding reference numerals to components in each figure, care should be taken to ensure that the same components have the same reference numerals whenever possible, even if they are shown in different figures.

[0065] Since the shapes, dimensions, ratios, angles, quantities, etc., disclosed in the accompanying drawings for describing exemplary embodiments of this disclosure are illustrative, this disclosure is not limited to the items shown. Throughout the specification, the same reference numerals denote the same components. Furthermore, in describing this disclosure, detailed descriptions of relevant known technologies will be omitted or briefly given when it is determined that such detailed descriptions may unnecessarily obscure the essential points of this disclosure. When terms such as "comprising," "having," "consisting of," "including," "containing," "formed by," etc., are used in this disclosure, other components may be added unless "only" is used. When a component is expressed in the singular, unless otherwise specifically stated, this includes cases where the component is represented as multiple components.

[0066] When interpreting a component, it is assumed to include a range of error, even without a separate explicit description. Any implementation described herein as an "example" is not necessarily to be interpreted as superior to or advantageous to other implementations.

[0067] When describing positional relationships (e.g., when using "above," "on top of," "on," "above," "below," "beside," etc. to describe the positional relationship between two components), one or more other components may be located between the two components unless "directly" or "immediately adjacent" is used. For example, when one element or layer is placed on top of another element or layer, a third layer or element may be placed between the one element or layer and the other element or layer.

[0068] When describing temporal relationships (e.g., when using terms like "after", "following", "then", "before"), discontinuous situations may be included unless the terms "immediately" or "directly" are used.

[0069] When describing signal flow relationships, for example, in the case of "signal is transmitted from node A to node B", unless "immediately" or "directly" is used, it may include the case where the signal is transmitted from node A to node B via another node.

[0070] Although terms such as first, second, A, B, or (A) or (B) are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, within the technical spirit of this disclosure, the first component described below can be the second component, and similarly, the second component can be referred to as the first component.

[0071] The features of the various exemplary embodiments of this disclosure can be partially or fully linked or combined, can be interconnected and driven in various ways, and these exemplary embodiments can be implemented independently of each other or together in an associated relationship.

[0072] The term “at least one of” should be understood to include any and all combinations of one or more of the associated listed items. For example, “at least one of the first element, the second element and the third element” means all combinations of the three listed elements, combinations of any two of the three elements, and each individual element (i.e., the first element, the second element or the third element).

[0073] 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 example embodiments pertain. It should also be understood that terms (e.g., those defined in common dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant field and should not be interpreted in an idealized or overly formal sense unless expressly defined herein. For example, as one of ordinary skill in the art will understand, the terms “component” or “unit” can be applied to, for example, a single circuit or structure, an integrated circuit, a computational block of a circuit device, or any structure configured to perform the described functions.

[0074] In describing this embodiment, descriptions of components that are the same as or correspond to those in the previous embodiments will be omitted or given only briefly.

[0075] In the following description, the display panel and the display device including the display panel according to this embodiment will be described with reference to the above description.

[0076] The transistors used in the display device disclosed herein can be implemented as one or more of n-channel transistors (NMOS) and p-channel transistors (PMOS). The transistors can be implemented as oxide semiconductor transistors with oxide semiconductor as the active layer or as low-temperature polycrystalline silicon (LTPS) transistors with low-temperature polycrystalline silicon (LTPS) as the active layer. The transistors can include at least a gate, a source, and a drain. The transistors can be implemented as thin-film transistors (TFTs) on a display panel. In the transistor, charge carriers flow from the source to the drain. In the case of an n-channel transistor (NMOS), since the charge carriers are electrons, the source voltage is lower than the drain voltage, allowing electrons to flow from the source to the drain. In an n-channel transistor (NMOS), current flows from the drain to the source, and the source can be an output terminal. In the case of a p-channel transistor (PMOS), since the charge carriers are holes, the source voltage is higher than the drain voltage, allowing holes to flow from the source to the drain. In a p-channel transistor (PMOS), current flows from the source to the drain because holes flow from the source to the drain, and the drain can be the output terminal. Therefore, it should be noted that the source and drain of the transistor are not fixed, as they can change depending on the applied voltage. The source can be the drain, and the drain can be the source. Moreover, the source in any aspect of this disclosure can be the drain in another aspect of this disclosure, and the drain in any aspect of this disclosure can be the source in another aspect of this invention.

[0077] In this disclosure, it is assumed that the transistor is an n-channel transistor (NMOS), but the implementation of this disclosure is not limited to this, and a p-channel transistor can be used, and the circuit configuration can be changed accordingly.

[0078] The gating signal of a transistor used as a switching element oscillates between the gate on-state voltage and the gate off-state voltage. The gate on-state voltage is set above the transistor's threshold voltage (V). th The voltage of the gate is set below the threshold voltage of the transistor (V). th The gate voltage is the gate on-state voltage. A transistor turns on in response to a gate on-state voltage and turns off in response to a gate off-state voltage. In the case of an n-channel transistor (NMOS), the gate on-state voltage can be gate high (VGH), and the gate off-state voltage can be gate low (VGL). In the case of a p-channel transistor (PMOS), the gate on-state voltage can be gate low (VGL), and the gate off-state voltage can be gate high (VGH).

[0079] In the following, various embodiments of this disclosure will be described in detail with reference to the accompanying drawings.

[0080] Figure 1 This is a schematic diagram of a display device according to an exemplary embodiment of the present disclosure.

[0081] Reference Figure 1 A display device 100 according to an example embodiment of the present disclosure may include a display panel 110, a data driver 120, a strobe driver 130, a timing controller 140, and other circuit components.

[0082] Figure 1 The configuration of a display panel 110 according to an example embodiment is shown, and the components of the display panel 110 are not limited to those described above. Figure 1 The example implementation shown can be modified, or some components can be added, changed, or omitted as needed.

[0083] According to one example implementation, display panel 110 is a panel for displaying images. Display panel 110 may include various circuits, lines, and light-emitting elements disposed on a substrate. Display panel 110 may include a plurality of pixels PX, divided and connected to the plurality of data lines DL and the plurality of gate lines GL, which intersect each other.

[0084] The display panel 110 may include a display area DA defined by multiple pixels PX and a non-display area NDA formed with various signal lines, pads, etc.

[0085] The non-display area NDA can be the area outside the display area DA, and is also called the edge area or border area. All or part of the non-display area NDA can be an area visible from the front surface of the display device 100, or an area that is curved from the front surface of the display device 100 and not visible, or an area covered by the housing or casing (not shown) of the display device 100.

[0086] The display panel 110 can be implemented as a display panel 110 used in various display devices such as liquid crystal display devices, plasma display devices (PDP), electroluminescent display devices (FED), organic light-emitting diode display devices, and electrophoretic display devices.

[0087] In the following description, the display panel 110 is described as a panel used in an organic light-emitting diode display device, but is not limited thereto.

[0088] According to one example implementation, the timing controller 140 can receive timing signals (e.g., vertical synchronization signals, horizontal synchronization signals, data enable signals, point clocks, etc.) via a receiving circuit connected to the host system (e.g., a Low Voltage Differential Signaling (LVDS) interface or a Transmission Minimized Differential Signaling (TMDS) interface, etc.). Furthermore, the timing controller 140 can generate timing control signals for controlling the data driver 120 and the strobe driver 130 based on the input timing signals.

[0089] According to one example implementation, data driver 120 can provide data voltage DATA to a plurality of sub-pixels SP. Data driver 120 may include a plurality of source driver integrated circuits (ICs). The plurality of source driver ICs can receive digital video data and source timing control signals from timing controller 140.

[0090] Multiple source driver ICs can convert digital video data into gamma voltage in response to source timing control signals to generate data voltage DATA, and provide the data voltage DATA through the data line DL of the display panel 110. The multiple source driver ICs can be connected to the data line DL of the display panel 110 via chip-on-glass (COG) technology or tape-on-board (TAB) technology.

[0091] In addition, the source driver IC can be formed on the display panel 110, or formed on a separate printed circuit board (PCB) substrate and connected to the display panel 110.

[0092] According to one example implementation, the gating driver 130 can provide gating signals to a plurality of sub-pixels SP. The gating driver 130 may include a level shifter / converter and a shift register. The level shifter / converter can convert the level of a clock signal input from the timing controller 140 to a transistor-transistor-logic (TTL) level, and then provide the clock signal to the shift register. The shift register may be formed in the non-display area NDA of the display panel 110 in an in-board gate (GIP) manner, but is not limited thereto.

[0093] Furthermore, a shift register can consist of multiple stages that shift in response to clock and drive signals and output strobe signals. The multiple stages within the shift register can sequentially output strobe signals through multiple output terminals.

[0094] According to one example implementation, the gate driver 130 can be connected to the display panel 110 via a TAB, to a conductive pad (such as a bonding pad) of the display panel 110 via a COG or COP (Chip on Board) method, or to the display panel 110 via a COF (Chip on Film) method. Alternatively, the gate driver 130 can be formed in the non-display area NDA of the display panel 110 in a GIP type, but is not limited thereto. Alternatively, the gate driver 130 can be disposed in the display area DA of the display panel 110. The gate driver 130 can be disposed on a substrate or connected to a substrate. That is, in the case of a GIP type, the gate driver 130 can be disposed in the non-display area NDA of the substrate. In the case of COG type, COF type, etc., the gate driver 130 can be connected to the substrate.

[0095] According to one example implementation, the display panel 110 may include a plurality of subpixels SP. The plurality of subpixels SP may be subpixels SP emitting different colors. For example, the plurality of subpixels SP may be red subpixels, green subpixels, blue subpixels, and white subpixels, but are not limited thereto. The plurality of subpixels SP may constitute a pixel PX. In another exemplary implementation, each subpixel SP may display one of cyan, magenta, and yellow.

[0096] In other words, a red subpixel (R), a green subpixel (G), a blue subpixel (B), and a white subpixel (W) can constitute a pixel PX, and the display panel 110 can include multiple pixels PX.

[0097] According to one example implementation, the display panel 110 may include a plurality of subpixels SP disposed on a substrate for displaying images. For example, the plurality of subpixels SP may be disposed in a display area DA. In some cases, at least one subpixel SP may be disposed in a non-display area NDA. At least one subpixel SP disposed in a non-display area NDA is also referred to as a virtual or dummy subpixel.

[0098] In the following text, reference will be made to Figure 2 A more detailed description of the driving unit used to drive a subpixel SP is given together.

[0099] Figure 2 This is a circuit diagram of a sub-pixel of a display device according to an example embodiment of the present disclosure.

[0100] Figure 2 A circuit diagram of one of the multiple sub-pixels SP of the display device 100 is shown.

[0101] Reference Figure 2In the display device 100 according to an exemplary embodiment of the present disclosure, each sub-pixel SP may include a light-emitting element ED, a driving transistor DRT for providing a driving current to the light-emitting element ED to drive the light-emitting element ED, a scanning transistor SCT for transmitting a data voltage Vdata to the driving transistor DRT, a storage capacitor Cst for maintaining the voltage for a predetermined period of time, etc.

[0102] According to one example implementation, the scanning transistor SCT can control the voltage state of the first node N1 of the driving transistor DRT to control the driving state of the sub-pixel SP. Each sub-pixel SP may also include a sensing transistor SENT, which can control the voltage state of the second node N2 of the driving transistor DRT to control the driving state of the sub-pixel SP.

[0103] Figure 2 The sub-pixel SP shown has a 3T (transistor) 1C (capacitor) structure because it has three transistors DRT, SCT, and SENT, and one capacitor Cst to drive the light-emitting element ED. For example, 4T1C, 5T1C, 3T2C, 4T2C, 5T2C, 6T2C, 7T1C, 7T2C, 8T2C structures, and so on, can also be used. More or fewer transistors and capacitors can be included.

[0104] According to one example implementation, a light-emitting element (ED) may include a pixel electrode (PE), a common electrode (CE), and a light-emitting layer (EL) located between the pixel electrode (PE) and the common electrode (CE). The pixel electrode (PE) of the ED may be an anode or a cathode. The common electrode (CE) may be a cathode or an anode. A base voltage (EVSS) corresponding to a common voltage may be applied to the common electrode (CE) of the ED. Here, the base voltage (EVSS) may be, for example, a ground voltage or a voltage similar to a ground voltage. For example, the ED may be an organic light-emitting diode (OLED), an inorganic light-emitting diode (LED), a quantum dot light-emitting element, etc.

[0105] For example, the light-emitting layer EL may include one or more of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), but this disclosure is not limited thereto.

[0106] According to one example implementation, the driving transistor DRT is a transistor used to drive the light-emitting element ED, and may include a first node N1, a second node N2, a third node N3, etc. The first node N1 of the driving transistor DRT is a node corresponding to the gate node and may be electrically connected to the source or drain node of the scanning transistor SCT. The second node N2 of the driving transistor DRT is a source or drain node and may be electrically connected to the source or drain node of the sensing transistor SENT and electrically connected to the pixel electrode PE of the light-emitting element ED. The third node N3 of the driving transistor DRT may be a drain or source node and may be electrically connected to the driving voltage line DVL that provides the driving voltage EVDD. In the following description, for ease of description, an example will be described where the second node N2 of the driving transistor DRT may be a source node and the third node N3 may be a drain node, but this is not a limitation. For example, the second node N2 of the driving transistor DRT may be a drain node and the third node may be a source node.

[0107] According to one example implementation, a scan transistor SCT can be connected between a data line DL and a first node N1 of a drive transistor DRT. The scan transistor SCT can control the connection between the first node N1 of the drive transistor DRT and a corresponding data line DL among a plurality of scan signal lines SCL, which serve as a gating line GL, in response to a scan signal SCAN. For example, the scan transistor SCT can be turned on or off in response to the scan signal SCAN.

[0108] According to one example implementation, the drain or source node of the scan transistor SCT can be electrically connected to the corresponding data line DL. The source or drain node of the scan transistor SCT can be electrically connected to the first node N1 of the driving transistor DRT. The gate node of the scan transistor SCT can be electrically connected to the scan signal line SCL, which serves as a gating line GL, to receive the scan signal SCAN.

[0109] According to one example implementation, the scan transistor SCT can be turned on by a scan signal SCAN at an on-level voltage, and can transmit the data voltage Vdata provided from the corresponding data line DL to the first node N1 of the driving transistor DRT. The scan transistor SCT can be turned on by a scan signal SCAN at an on-level voltage, and turned off by a scan signal SCAN at a off-level voltage. For example, the scan transistor SCT can be turned off by a scan signal SCAN at an off-level voltage, and cannot provide the data voltage Vdata provided from the corresponding data line DL to the first node N1 of the driving transistor DRT.

[0110] Here, when the scanning transistor SCT is n-type, the on-state voltage can be a high-level voltage, and the off-state voltage can be a low-level voltage. When the scanning transistor SCT is p-type, the on-state voltage can be a low-level voltage, and the off-state voltage can be a high-level voltage.

[0111] According to one example implementation, a sensing transistor SENT can be connected between a second node N2 of the driving transistor DRT and a reference voltage line RVL. The sensing transistor SENT can control the connection between the second node N2 of the driving transistor DRT, which is electrically connected to the pixel electrode PE of the light-emitting element ED, and a corresponding reference voltage line RVL, among a plurality of sensing signal lines SENL acting as a gate line GL, in response to a sensing signal SENSE. For example, the sensing transistor SENT can be turned on or off in response to the sensing signal SENSE.

[0112] According to one example implementation, the drain or source node of the sensing transistor SENT can be electrically connected to the reference voltage line RVL. The source or drain node of the sensing transistor SENT can be electrically connected to the second node N2 of the driving transistor DRT and electrically connected to the pixel electrode PE of the light-emitting element ED. The gate node of the sensing transistor SENT can be electrically connected to the sensing signal line SENL, which serves as a gate line GL, to receive the sensing signal SENSE.

[0113] According to one example implementation, the sensing transistor SENT can be turned on to transmit the reference voltage V supplied from the reference voltage line RVL. ref The second node N2 of the driving transistor DRT is applied. The sensing transistor SENT is turned on by the sensing signal SENSE at the on-level voltage and turned off by the sensing signal SENSE at the off-level voltage. For example, the sensing transistor SENT can be turned off by the sensing signal SENSE at the off-level voltage and cannot be turned off by the reference voltage V provided from the reference voltage line RVL. ref The second node N2 is provided to the driving transistor DRT.

[0114] When the sensing transistor SENT is n-type, the on-state voltage can be high and the off-state voltage can be low. When the sensing transistor SENT is p-type, the on-state voltage can be low and the off-state voltage can be high.

[0115] According to one example implementation, the storage capacitor Cst can be electrically connected between the first node N1 and the second node N2 of the driving transistor DRT to maintain the data voltage Vdata corresponding to the image signal voltage or the voltage corresponding thereto within one frame.

[0116] According to one example implementation, the storage capacitor Cst can be an external capacitor intentionally designed outside the driving transistor DRT, rather than a parasitic capacitor (e.g., Cgs or Cgd) existing as an internal capacitor between the first node N1 and the second node N2 of the driving transistor DRT.

[0117] According to one example implementation, each of the driving transistor DRT, the scanning transistor SCT, and the sensing transistor SENT can be an n-type transistor or a p-type transistor. The driving transistor DRT, the scanning transistor SCT, and the sensing transistor SENT can all be n-type transistors or p-type transistors, but are not limited thereto. At least one of the driving transistor DRT, the scanning transistor SCT, and the sensing transistor SENT can be an n-type transistor (or a p-type transistor), while the other transistors can be p-type transistors (or n-type transistors).

[0118] According to one example implementation, the scan signal line SCL and the sensing signal line SENL can be different gating lines GL. In this case, the scan signal SCAN and the sensing signal SENSE can be separate gating signals, and the turn-on / off timings of the scan transistor SCT and the sensing transistor SENT in a sub-pixel SP can be independent, but are not limited thereto. That is, the turn-on / off timings of the scan transistor SCT and the sensing transistor SENT in a sub-pixel SP can be the same or different.

[0119] Alternatively, the scan signal line SCL and the sensing signal line SENL can be the same gating line GL. That is, the gate node of the scan transistor SCT and the gate node of the sensing transistor SENT in a sub-pixel SP can be connected to a single gating line GL. In this case, the scan signal SCAN and the sensing signal SENSE can be the same gating signal, and the turn-on / off timing of the scan transistor SCT and the sensing transistor SENT in a sub-pixel SP can be the same, but are not limited to this. In other words, the turn-on / off timing of the scan transistor SCT and the sensing transistor SENT in a sub-pixel SP can be the same or different.

[0120] According to one example implementation, a reference voltage line RVL can be set in each sub-pixel column.

[0121] Alternatively, a reference voltage line RVL can be provided every two or more sub-pixel columns. When a reference voltage line RVL is provided every two or more sub-pixel columns, multiple sub-pixels SP can receive a reference voltage V from a single reference voltage line RVL. refFor example, a reference voltage line RVL can be set for every four sub-pixel columns, but it is not limited to this. That is, a reference voltage line RVL can be shared by sub-pixels SP included in four sub-pixel columns.

[0122] According to one example implementation, the driving voltage line (DVL) can be set in each sub-pixel column.

[0123] Alternatively, a driving voltage line (DVL) can be provided every two or more sub-pixel columns. When a driving voltage line (DVL) is provided every two or more sub-pixel columns, multiple sub-pixels (SPs) can receive the driving voltage (EVDD) from a single driving voltage line (DVL). For example, a driving voltage line (DVL) can be provided every four sub-pixel columns. That is, a single driving voltage line (DVL) can be shared by sub-pixels (SPs) included in four sub-pixel columns.

[0124] Figure 2 The 3T1C structure of the sub-pixel SP shown is merely an example for description and may include one or more transistors, or in some cases one or more capacitors. Alternatively, each of the multiple sub-pixels may have the same structure, or some of the multiple sub-pixels may have different structures.

[0125] Meanwhile, the display device 100 according to the exemplary embodiments of this disclosure may have a top-emitting structure or a bottom-emitting structure.

[0126] Furthermore, each of the multiple sub-pixels SP includes circuit elements such as light-emitting elements (EDs) and driving transistors (DRTs) that can have unique characteristics. For example, each ED can have unique characteristics such as a threshold voltage. Each DRT can have unique characteristics such as a threshold voltage and mobility.

[0127] According to one example implementation, the characteristics of the light-emitting element (ED) can vary with increasing driving time of the ED. Similarly, the characteristics of the driving transistor (DRT) can vary with increasing driving time of the driving transistor.

[0128] According to one example implementation, the driving times of the multiple sub-pixels SP can be different. Therefore, the characteristic variations of the light-emitting elements ED included in each of the multiple sub-pixels SP can be different. Thus, characteristic deviations may occur between the light-emitting elements ED. Furthermore, the characteristic variations of the driving transistors DRT included in each of the multiple sub-pixels SP can be different. Therefore, characteristic deviations may occur between the driving transistors DRT.

[0129] Characteristic deviations between light-emitting elements (EDs) or between driving transistors (DRTs) can lead to brightness deviations between sub-pixels (SPs). Therefore, the brightness uniformity of the display panel 110 may decrease, resulting in image quality degradation.

[0130] Therefore, the display device 100 according to the exemplary embodiment of this disclosure can provide a compensation function to reduce the characteristic deviation between light-emitting elements ED or the characteristic deviation between driving transistors DRT, and includes a compensation circuit for this compensation function. Hereinafter, reference will be made to... Figure 3 Describe the compensation function and compensation circuit.

[0131] Figure 3 The compensation circuit of the display device 100 according to an embodiment of the present disclosure is shown.

[0132] The compensation circuit of the display device 100 according to an exemplary embodiment of the present disclosure is a circuit capable of performing sensing and compensation processing on the characteristics of circuit elements in the sub-pixel SP.

[0133] Reference Figure 3 The compensation circuit can basically include the sub-pixel SP, and can include a power switch SPRE, a sampling switch SAM, an analog-to-digital converter ADC, a compensator 320, etc., to control the operation of the sub-pixel SP or sense and compensate for the characteristics of the sub-pixel SP (e.g., the threshold voltage of the light-emitting element ED, the threshold voltage of the driving transistor DRT, mobility, etc.).

[0134] The power switch SPRE can be connected to the reference voltage line RVL and the reference voltage application node N. ref Between. According to one example implementation, the power switch SPRE can control the reference voltage line RVL and the reference voltage application node N. ref The connection between them. The reference voltage V output from the power supply unit can be... ref It can provide the reference voltage to the application node N ref And the reference voltage applied to node N can be switched via power switch SPRE. ref Reference voltage V ref Apply to the reference voltage line RVL.

[0135] A sampling switch (SAM) can be connected between the analog-to-digital converter (ADC) and the reference voltage line RVL. According to one example implementation, the sampling switch SAM controls the connection between the ADC and the reference voltage line RVL. When the ADC is connected to the reference voltage line RVL via the sampling switch SAM, the ADC can convert the voltage (analog voltage) of the connected reference voltage line RVL into a sensed value corresponding to a digital value.

[0136] According to one example implementation, the line capacitor C rvl This can be formed between the reference voltage line RLV and ground GND. The voltage of the reference voltage line RVL can correspond to the line capacitor C. rvl The amount of charge.

[0137] According to one example implementation, the analog-to-digital converter (ADC) can provide sensing data, including sensing values, to the compensator 320. The compensator 320 can then determine the characteristics of the light-emitting element (ED) or driving transistor (DRT) included in the corresponding sub-pixel SP based on the sensing data, calculate a compensation value, and store the compensation value in the memory 310.

[0138] For example, compensation values ​​are information used to reduce characteristic deviations between light-emitting elements (EDs) or between driving transistors (DRTs), and may include offset and gain values ​​used to change the data.

[0139] According to one example implementation, the timing controller 140 can use compensation values ​​stored in the memory 310 to change image data and provide the changed image data to the data driver 120.

[0140] According to one example implementation, the data driver 120 may include a data signal supplier 300 for outputting data signals to multiple data lines DL. The data signal supplier 300 may include latch circuitry, a digital-to-analog converter (DAC), etc.

[0141] According to one example implementation, the data signal supplier 300 of the data driver 120 can convert image data that has changed based on a compensation value into an analog voltage data signal Vdata, and output the analog voltage data using a digital-to-analog converter (DAC). Therefore, compensation can be achieved.

[0142] Reference Figure 3 The analog-to-digital converter (ADC), power switch SPRE, and sampling switch SAM may be included in, but are not limited to, the data driver 120. For example, a data signal supplier 300 for outputting data signals to multiple data lines DL may be included in the data driver 120. Furthermore, the memory 310 and the compensator 320 may be included in the timing controller 140.

[0143] Figure 4 This is a first exemplary view illustrating a driving method for a display panel according to an example embodiment of the present disclosure.

[0144] Reference Figure 4 The data driver 120 can drive 16 data lines based on a single data line, but is not limited to this.

[0145] As an example, multiple sub-pixels may include multiple first sub-pixels of a first pixel sharing a first reference voltage line Ref.1, and multiple second sub-pixels of a second pixel sharing a second reference voltage line Ref.2. The first reference voltage line Ref.1 may provide a reference voltage to the first pixel, and the second reference voltage line Ref.2 may provide a reference voltage to the second pixel.

[0146] Reference Figure 4 Multiple sub-pixels may include the first sub-pixel R of the first pixel sharing the first reference voltage line Ref.1. 11 W 11 G 11 and B 11 And the second sub-pixel R of the second pixel sharing the second reference voltage line Ref.2 12 W 12 G 12 and B 12 However, this is not the only possibility. Similarly, multiple sub-pixels may include a third sub-pixel R of a third pixel sharing a third reference voltage line Ref.3. 13 W 13 G 13 and B 13 and the fourth sub-pixel R of the fourth pixel of the fourth pixel of the shared fourth reference voltage line Ref.4 14 W 14 G 14 and B 14 However, it is not limited to this.

[0147] Furthermore, the first reference voltage line Ref.1 is connected to the first sensing channel terminal SIO1, the second reference voltage line Ref.2 is connected to the second sensing channel terminal SIO2, the third reference voltage line Ref.3 is connected to the third sensing channel terminal SIO3, and the fourth reference voltage line Ref.4 is connected to the fourth sensing channel terminal SIO4. Additionally, the data driver 120 can obtain the sensing voltage of the corresponding sub-pixel through each sensing channel.

[0148] Figure 4 The diagram shows four pixels arranged along a single row, but it is clear that the display panel 110 according to this disclosure may have multiple pixels arranged along multiple rows.

[0149] For example, a first pixel may include multiple first sub-pixels (e.g., red sub-pixel R). 11 White sub-pixel W 11 Blue sub-pixel G 11 and green sub-pixel B 11 Furthermore, the second pixel may include multiple second sub-pixels (e.g., the red sub-pixel R). 12 White sub-pixel W 12Blue sub-pixel G 12 and green sub-pixel B 12 (but not limited to this).

[0150] Similarly, a third pixel can include multiple third sub-pixels (e.g., the red sub-pixel R). 13 White sub-pixel W 13 Blue sub-pixel G 13 and green sub-pixel B 13 The fourth pixel can include multiple fourth sub-pixels (e.g., the red sub-pixel R). 14 White sub-pixel W 14 Blue sub-pixel G 14 and green sub-pixel B 14 (but not limited to this).

[0151] According to one example implementation, each of the first reference voltage line Ref.1 to the fourth reference voltage line Ref.4 may have the following characteristics: Figure 3 The power switch SPRE and sampling switch SAM are shown.

[0152] According to one example implementation, each reference voltage line (e.g., Ref.1, Ref.2, Ref.3, or Ref.4) is associated with the reference voltage application node N. ref The electrical connections between them can be switched via SPRE at each power switch.

[0153] For example, the electrical connection between each reference voltage line and the analog-to-digital converter (ADC) can be switched using a sampling switch (SAM).

[0154] According to one example implementation, the power switch SPRE and the sampling switch SAM may be included in the data driver 120. In this case, the data driver 120 may include a sensing channel terminal ST to which each reference voltage line is connected.

[0155] First sub-pixel R 11 W 11 G 11 and B 11 It is described as sharing a first reference voltage line Ref.1. However, according to this disclosure, the second sub-pixel R 12 W 12 G 12 and B 12 The second reference voltage line Ref.2 and the third sub-pixel R can be shared. 13 W 13 G 13 and B 13 The third reference voltage line Ref.3 can be shared, and the fourth sub-pixel R 14 W 14 G14 and B 14 The fourth reference voltage line Ref.4 can be shared.

[0156] Furthermore, the power switch SPRE and the sampling switch SAM are present on each of the first reference voltage line Ref.1, the second reference voltage line Ref.2, the third reference voltage line Ref.3, and the fourth reference voltage line Ref.4, and each of the reference voltage lines (e.g., Ref.1, Ref.2, Ref.3, and Ref.4) is connected to the reference voltage application node N. ref The electrical connections between them can be switched using their respective power switches (SPRE).

[0157] According to one example implementation, each subpixel can be connected to each data line, but is not limited to this. For example, 16 subpixels can receive data signals through 16 data lines.

[0158] According to one example implementation, the data driver 120 can be connected to 16 data lines via 16 channel terminals. Furthermore, the data driver 120 can drive each data line individually and independently. Additionally, the 16 data channel terminals Ch1, Ch2, Ch3, Ch4, Ch5, Ch6, Ch7, Ch8, Ch9, Ch10, Ch11, Ch12, Ch13, Ch14, Ch15, and Ch16 can be connected to the data signal supplier 300 of the data driver 120.

[0159] Furthermore, a scan signal line Scan1 can be set in each sub-pixel row. That is, 16 sub-pixels can be connected to a single scan signal line Scan1. In addition, the 16 sub-pixels can collectively receive scan signals through a single scan signal line Scan1.

[0160] For example, the display device 100 cannot simultaneously perform sensing drive on each sub-pixel of each of the shared first reference voltage line Ref.1 and second reference voltage line Ref.2.

[0161] According to one example implementation, the display device 100 cannot simultaneously access the first sub-pixel R sharing the first reference voltage line Ref.1. 11 W 11 G 11 and B 11 The red sub-pixel R included 11 White sub-pixel W 11 Green subpixel G 11 and blue sub-pixel B 11 Each of the execution sense drivers.

[0162] Furthermore, the display device 100 cannot simultaneously access the second sub-pixel R that shares the second reference voltage line Ref.2. 12 W 12 G 12 and B 12 The red sub-pixel R included 12 White sub-pixel W 12 Green subpixel G 12 and blue sub-pixel B 12 Each of the execution sense drivers.

[0163] Similarly, the display device 100 cannot simultaneously perform sensing drive on each sub-pixel of each of the shared third reference voltage line Ref.3 and fourth reference voltage line Ref.4.

[0164] According to one example implementation, the 16 sub-pixels can be connected to 16 data lines respectively, but are not limited thereto. Therefore, the 16 sub-pixels can receive data signals through their respective data lines.

[0165] According to one example implementation, the data driver 120 can drive 16 data lines individually and independently.

[0166] The data driver 120 can provide different data signals to 16 data lines. For this purpose, the data driver 120 can include 16 data channel terminals, each connected to one of the 16 data lines. These 16 data channel terminals can be connected to the data signal supplier 300.

[0167] Reference Figure 4 The pixels of the display panel 110 operate using a single-rate drive (SRD) method, with a drive-sensor ratio of 16:4 (i.e., 4:1) for each sub-pixel, and a total of 4 reference compensation times in a scan line.

[0168] Figure 5 This is a second exemplary view illustrating a driving method for a display panel according to an example embodiment of the present disclosure.

[0169] Reference Figure 5 The data driver 120 can drive 16 data lines on top of 2 data lines, but is not limited to this.

[0170] As an example, the data driver 120 may include a common red data channel terminal Ch1, a common white data channel terminal Ch2, a common green data channel terminal Ch3, and a common blue data channel terminal Ch4.

[0171] According to one example implementation, the data driver 120 can simultaneously drive the red sub-pixel R included in the first sub-pixel. 11The data line and the connection to the red sub-pixel R included in the second sub-pixel 12 The data line. For this purpose, the data driver 120 may include a common red data channel terminal Ch1, connected to the red sub-pixel R included in the first sub-pixel. 11 The data line and the connection to the red sub-pixel R included in the second sub-pixel 12 The data lines are connected together to the common red data channel terminal Ch1.

[0172] Furthermore, the data driver 120 can simultaneously drive the white sub-pixel W included in the first sub-pixel. 11 The data line and the connection to the white sub-pixel W included in the second sub-pixel 12 The data lines. For this purpose, the data driver 120 may include a common white data channel terminal Ch2 to which these data lines are commonly connected. For example, connected to the white sub-pixel W included in the first sub-pixel. 11 The data line and the connection to the white sub-pixel W included in the second sub-pixel 12 The data cables can be connected together to the common white data channel terminal Ch2.

[0173] Furthermore, the data driver 120 can simultaneously drive the green sub-pixel G included in the first sub-pixel. 11 The data line and the connection to the green sub-pixel G included in the second sub-pixel 12 The data lines. For this purpose, the data driver 120 may include a common green data channel terminal Ch3 to which these data lines are commonly connected. For example, connected to the green sub-pixel G included in the first sub-pixel. 11 The data line and the connection to the green sub-pixel G included in the second sub-pixel 12 The data cables can be connected together to the common green data channel terminal Ch3.

[0174] Furthermore, the data driver 120 can simultaneously drive the blue sub-pixel B included in the first sub-pixel. 11 The data line and the connection to the blue sub-pixel B included in the second sub-pixel 12 The data lines. For this purpose, the data driver 120 may include a common blue data channel terminal Ch4 to which these data lines are commonly connected. For example, connected to the blue sub-pixel B included in the first sub-pixel. 11 The data line and the connection to the blue sub-pixel B included in the second sub-pixel 12 The data cables can be connected together to the common blue data channel terminal Ch4.

[0175] When the data driver 120 outputs a data signal to the common red data channel terminal Ch1, the data signal can be provided to the red sub-pixel R included in the first sub-pixel.11 The data line and the connection to the red sub-pixel R included in the second sub-pixel 12 Both data cables.

[0176] Data driver 120 can simultaneously drive the white sub-pixel W included in the first sub-pixel. 11 The data line and the connection to the white sub-pixel W included in the second sub-pixel 12 The data cable.

[0177] For this purpose, the data driver 120 may include a common white data channel terminal Ch2, connected to the white sub-pixel W included in the first sub-pixel. 11 The data line and the connection to the white sub-pixel W included in the second sub-pixel 12 The data cables are connected together to the common white data channel terminal Ch2.

[0178] When the data driver 120 outputs a data signal to the common white data channel terminal Ch2, the data signal can be provided to the white sub-pixel W included in the first sub-pixel. 11 The data line and the connection to the white sub-pixel W included in the second sub-pixel 12 Both data cables.

[0179] Data driver 120 can simultaneously drive the green sub-pixel G included in the first sub-pixel. 11 The data line and the connection to the green sub-pixel G included in the second sub-pixel 12 The data cable.

[0180] For this purpose, the data driver 120 may include a common green data channel terminal Ch3, connected to the green sub-pixel G included in the first sub-pixel. 11 The data line and the connection to the green sub-pixel G included in the second sub-pixel 12 The data cables are connected together to the public green data channel terminal Ch3.

[0181] When the data driver 120 outputs a data signal to the common green data channel terminal Ch3, the data signal can be provided to the green sub-pixel G included in the first sub-pixel. 11 The data line and the connection to the green sub-pixel G included in the second sub-pixel 12 Both data cables.

[0182] Data driver 120 can simultaneously drive the blue sub-pixel B included in the first sub-pixel. 11 The data line and the connection to the blue sub-pixel B included in the second sub-pixel 12 The data cable.

[0183] For this purpose, the data driver 120 may include a common blue data channel terminal Ch4, connected to the blue sub-pixel B included in the first sub-pixel. 11 The data line and the connection to the blue sub-pixel B included in the second sub-pixel 12 The data cables are connected together to the common blue data channel terminal Ch4.

[0184] When the data driver 120 outputs a data signal to the common blue data channel terminal Ch4, the data signal can be provided to the blue sub-pixel B included in the first sub-pixel. 11 The data line and the connection to the blue sub-pixel B included in the second sub-pixel 12 Both data cables.

[0185] As described above, the common red data channel terminal Ch1, the common white data channel terminal Ch2, the common green data channel terminal Ch3, and the common blue data channel terminal Ch4 can be connected to the data signal supply 300 of the data driver 120.

[0186] Furthermore, the first reference voltage line Ref.1 is connected to the first sensing channel terminal SIO1, the second reference voltage line Ref.2 is connected to the second sensing channel terminal SIO2, the third reference voltage line Ref.3 is connected to the third sensing channel terminal SIO3, and the fourth reference voltage line Ref.4 is connected to the fourth sensing channel terminal SIO4. Additionally, the data driver 120 can obtain the sensing voltage of the corresponding sub-pixel through each sensing channel.

[0187] Reference Figure 5 The pixels of the display panel 110 are operated by the dual-rate drive (DRD) method, with a drive-sensor ratio of 8:4 (i.e. 2:1) for each sub-pixel, and a total of 4 reference compensation times in a scan line.

[0188] Figure 6 This is a third exemplary view illustrating a driving method for a display panel according to an example embodiment of the present disclosure.

[0189] Figure 6 Structure and Figure 5 The difference is that the reference voltage lines are bundled together and connected to a sensing channel.

[0190] According to an example implementation, in the SRD and DRD methods, the first sub-pixel R of the first pixel is... 11 W 11 G 11 and B 11 Shared reference voltage line Ref.1 (A) and the second sub-pixel R of the second pixel 12 W12 G 12 and B 12 The shared reference voltage line Ref.1(B) is integrated to share the source driver IC and is connected to the first sensing channel terminal SIO1.

[0191] According to an example implementation, in the SRD and DRD methods, the third sub-pixel R of the third pixel... 13 W 13 G 13 and B 13 Shared reference voltage line Ref.2(A) and the fourth sub-pixel R of the fourth pixel 14 W 14 G 14 and B 14 The shared reference voltage line Ref.2(B) is integrated to share the source driver IC and is connected to the second sensing channel terminal SIO2.

[0192] However, due to the bundled structure of the reference voltage lines, when a defect occurs in one reference voltage line (e.g., Ref. 2 (B)), the same defect also occurs in the connected reference voltage lines (e.g., Ref. 2 (A)).

[0193] Reference Figure 6 The pixels of the display panel 110 are operated by the SRD and DRD methods. The drive sensing ratio in the IC block is 8:2 (i.e., 4:1), the drive sensing ratio in the pad portion is 8:2 (i.e., 4:1), and the total number of reference compensation times in a scan line is 8.

[0194] Figure 7 Is shown as added Figure 5 A fourth exemplary view of the multiple switching elements M1 and M2 in the driving method of the display panel.

[0195] Reference Figure 7 In the data driver 120, the first sensing channel terminal SIO1 can be connected to the reference voltage lines (Ref.1(A) and Ref.1(B)).

[0196] Figure 7 Multiplexers 710 and 720 are illustrated as 2:1 multiplexers to connect a sensing channel to two reference voltage lines in data driver 120, but the display panel 110 according to this disclosure is not limited thereto. For example, each of multiplexers 710 and 720 can be implemented as a 3:1 multiplexer to connect a sensing channel to three reference voltage lines in data driver 120. Multiplexers 710 and 720 can be formed directly on the substrate of display panel 110, or integrated with data driver 120 into a driver IC.

[0197] According to one example implementation, the first multiplexer 710 can use switching elements M1 and M2 to provide sensed values ​​transmitted from reference voltage lines Ref.1(A) and Ref.1(B) via the first sensing channel terminal SIO1 of the data driver 120.

[0198] In addition, the first switching element M1 is turned on in response to the high gate voltage VGH of the first multiplexed signal MUX1.

[0199] At this time, the sensed value transmitted from the reference voltage line Ref.1 (A) is transmitted to the first sense channel terminal SIO1, and the sensed value transmitted from the reference voltage line Ref.2 (A) is transmitted to the second sense channel terminal SIO2.

[0200] According to one example implementation, the second multiplexer 720 can use switching elements M1 and M2 to provide sensed values ​​transmitted from reference voltage lines Ref.2(A) and Ref.2(B) via the second sensing channel terminal SIO2 of the data driver 120.

[0201] In addition, the second switching element M2 is turned on in response to the high gate voltage VGH of the second multiplexed signal MUX2.

[0202] At this time, the sensed value transmitted from the reference voltage line Ref.1(B) is transmitted to the first sense channel terminal SIO1, and the sensed value transmitted from the reference voltage line Ref.2(B) is transmitted to the second sense channel terminal SIO2.

[0203] According to an example implementation, in the SRD and DRD methods, the first sub-pixel R of the first pixel is... 11 W 11 G 11 and B 11 Shared reference voltage line Ref.1 (A) and the second sub-pixel R of the second pixel 12 W 12 G 12 and B 12 The shared reference voltage line Ref.1(B) is integrated to share the source driver IC and is connected to the first sensing channel terminal SIO1 in a multiplexer structure.

[0204] According to an example implementation, in the SRD and DRD methods, the third sub-pixel R of the third pixel... 13 W 13 G 13 and B 13 Shared reference voltage line Ref.2(A) and the fourth sub-pixel R of the fourth pixel 14 W14 G 14 and B 14 The shared reference voltage line Ref.2(B) is integrated to share the source driver IC and is connected to the second sensing channel terminal SIO2 in a multiplexer structure.

[0205] Reference Figure 7 The pixels of the display panel 110 are operated by the SRD and DRD methods. The drive sensing ratio in the IC block is 8:2 (i.e., 4:1), the drive sensing ratio in the pad portion is 8:2 (i.e., 4:1), and the total number of reference compensation times in a scan line is 4.

[0206] Due to compensation and improved visibility Figure 4 and Figure 5 The SRD and DRD methods shown do not require sharing a source driver IC. That is, this is because the drive-sensor ratio is 4:1 in the SRD method and 2:1 in the DRD method.

[0207] In addition, due to Figure 6 The SRD and DRD methods shown integrate reference voltage lines Ref.1(A) and Ref.1(B) to share the source driver IC, thus doubling the compensation time and potentially degrading image quality due to defects in the reference voltage lines. In other words, integrating reference voltage lines Ref.1(A) and Ref.1(B) increases visibility.

[0208] also, Figure 7 The SRD and DRD methods shown have multiplexer structures for sharing source driver ICs, but the width of the bezel may increase.

[0209] As described above, when the display panel 110 is operated using the SRD and DRD methods, there are limitations on the shared source driver IC due to the different ratios of the driving lines and sensing lines of the sub-pixels. Furthermore, in order to share the source driver IC, the sensing channels can be configured as multiplexer switches, or the sensing channels can be integrated and used together. However, this increases the compensation time and image quality degradation due to the increased bezel of the data pad portion and the integration of the reference voltage lines (e.g., from 1 line to 2 lines).

[0210] Therefore, in order to share the source driver IC, switches must be configured to reduce sensing time and increase accuracy in non-pad areas, thereby preventing an increase in the bezel width of the data pad area in the DRD panel structure, and a separate driving reference voltage line to ensure that image quality degradation is at the same level in terms of performance as that in SRD. Furthermore, in the SRD approach, the cost of the source driver IC needs to be reduced by decreasing the number of sensing channels. This will be described below.

[0211] Figure 8 This is a fifth exemplary view illustrating a driving method for a display panel according to an example embodiment of the present disclosure.

[0212] Reference Figure 8 The data driver 120 can drive 16 data lines on top of 2 data lines.

[0213] As an example, the data driver 120 can simultaneously drive a data line connected to one subpixel among a plurality of subpixels included in a first pixel and a data line connected to a corresponding subpixel among a plurality of subpixels included in a second pixel. To this end, the data driver 120 may include a common data channel terminal, to which both the data line connected to one subpixel among the plurality of subpixels included in the first pixel and the data line connected to a corresponding subpixel among the plurality of subpixels included in the second pixel are connected.

[0214] According to one example implementation, the data driver 120 can simultaneously drive the red sub-pixel R included in the first sub-pixel. 11 The data line and the connection to the red sub-pixel R included in the second sub-pixel 12 The data line. For this purpose, the data driver 120 may include a common red data channel terminal Ch1, connected to the red sub-pixel R included in the first sub-pixel. 11 The data line and the connection to the red sub-pixel R included in the second sub-pixel 12 The data lines are connected together to the common red data channel terminal Ch1.

[0215] Furthermore, the data driver 120 can simultaneously drive the white sub-pixel W included in the first sub-pixel. 11 The data line and the connection to the white sub-pixel W included in the second sub-pixel 12 The data line. For this purpose, the data driver 120 may include a common white data channel terminal Ch2, connected to the white sub-pixel W included in the first sub-pixel. 11 The data line and the connection to the white sub-pixel W included in the second sub-pixel 12 The data cables are connected together to the common white data channel terminal Ch2.

[0216] Furthermore, the data driver 120 can simultaneously drive the green sub-pixel G included in the first sub-pixel. 11 The data line and the connection to the green sub-pixel G included in the second sub-pixel 12 The data line. For this purpose, the data driver 120 may include a common green data channel terminal Ch3, connected to the green sub-pixel G included in the first sub-pixel. 11The data line and the connection to the green sub-pixel G included in the second sub-pixel 12 The data cables are connected together to the public green data channel terminal Ch3.

[0217] Furthermore, the data driver 120 can simultaneously drive the blue sub-pixel B included in the first sub-pixel. 11 The data line and the connection to the blue sub-pixel B included in the second sub-pixel 12 The data line. For this purpose, the data driver 120 may include a common blue data channel terminal Ch4, connected to the blue sub-pixel B included in the first sub-pixel. 11 The data line and the blue sub-pixel included in the second sub-pixel. B12 The data cables are connected together to the common blue data channel terminal Ch4.

[0218] According to one example implementation, when the data driver 120 outputs a data signal to the common red data channel terminal Ch1, the output data signal can be provided to the red sub-pixel R included in the first sub-pixel. 11 The data line and the connection to the red sub-pixel R included in the second sub-pixel 12 Both data cables.

[0219] According to one example implementation, when the data driver 120 outputs a data signal to the common white data channel terminal Ch2, the data signal can be provided to the white sub-pixel W included in the first sub-pixel. 11 The data line and the connection to the white sub-pixel W included in the second sub-pixel 12 Both data cables.

[0220] According to one example implementation, when the data driver 120 outputs a data signal to the common green data channel terminal Ch3, the data signal can be provided to the green sub-pixel G included in the first sub-pixel. 11 The data line and the connection to the green sub-pixel G included in the second sub-pixel 12 Both data cables.

[0221] According to one example implementation, when the data driver 120 outputs a data signal to the common blue data channel terminal Ch4, the data signal can be provided to the blue sub-pixel B included in the first sub-pixel. 11 The data line and the connection to the blue sub-pixel B included in the second sub-pixel 12 Both data cables.

[0222] As described above, the common red data channel terminal Ch1, the common white data channel terminal Ch2, the common green data channel terminal Ch3, and the common blue data channel terminal Ch4 can be connected to the data signal supply 300 of the data driver 120.

[0223] Furthermore, the first reference voltage line Ref.1 is connected to the first sensing channel terminal SIO1, the second reference voltage line Ref.2 is not connected to the second sensing channel terminal SIO2, the third reference voltage line Ref.3 is connected to the third sensing channel terminal SIO3, and the fourth reference voltage line Ref.4 is not connected to the fourth sensing channel terminal SIO4. Additionally, the data driver 120 can obtain the sensing voltage of the corresponding sub-pixel through each sensing channel.

[0224] According to an example implementation, reference voltage line Ref.1(A) is disposed in a sub-pixel of a first column, reference voltage line Ref.1(B) is disposed in a sub-pixel of a second column, reference voltage line Ref.2(A) is disposed in a sub-pixel of a third column, and reference voltage line Ref.2(B) is disposed in a sub-pixel of a fourth column.

[0225] According to one example implementation, a reference voltage line Ref.1(A) is provided in the sub-pixels of the first column to obtain the sensed values ​​of the sub-pixels of the first column, and the sensed values ​​are transmitted to the data driver 120 through the first sensing channel terminal SIO1. Furthermore, the characteristics of the sub-pixels of the first column are applied to compensate the sub-pixels of the second column where the reference voltage line Ref.1(B) is provided. Thus, since the characteristics of the sub-pixels of the first column are applied to the compensated values ​​of the sub-pixels of the second column, the reference voltage line Ref.1(B) does not need to be connected to the first sensing channel terminal SIO1.

[0226] For example, when the characteristics of the sub-pixels in the first column are defect-free, the characteristics of the sub-pixels in the first column are applied to the compensation values ​​of the sub-pixels in the second column.

[0227] According to one example implementation, a reference voltage line Ref.2(A) is provided in the sub-pixels of the third column to obtain the sensed values ​​of the sub-pixels in the third column, and the sensed values ​​are transmitted to the data driver 120 via the second sensing channel terminal SIO2. Furthermore, the characteristics of the sub-pixels in the third column are applied to compensate the sub-pixels in the fourth column where the reference voltage line Ref.2(B) is provided. Thus, since the characteristics of the sub-pixels in the third column are applied to the compensation values ​​of the sub-pixels in the fourth column, the reference voltage line Ref.2(B) does not need to be connected to the second sensing channel terminal SIO2.

[0228] For example, when the characteristics of the sub-pixels in the third column are defect-free, the characteristics of the sub-pixels in the third column are applied to the compensation value of the sub-pixels in the fourth column.

[0229] According to one example implementation, the display panel 110 may have a switching unit 810, which includes a plurality of switches disposed at the lower part of the display area DA (see [link to implementation details]). Figure 1 For example, the switch unit 810 may be located in a non-display area (e.g., the border area) of the display panel 110.

[0230] According to one example implementation, the switching unit 810 may include at least one sensing switch 820 and at least one driving switch 830.

[0231] For example, the switching unit 810 can be connected to the first reference voltage line Ref.1 and the second reference voltage line Ref.2, perform switching to selectively sense the characteristics of a sub-pixel of one of the first and second pixels, and switch the path along which the reference voltage is transmitted to one of the first and second reference voltage lines Ref.1 and Ref.2, so as to drive the first and second reference voltage lines Ref.1 and Ref.2 respectively.

[0232] According to one example implementation, the sensing switch 820 may include a first sensing switch 821 connected to a first sub-pixel R of the first pixel. 11 W 11 G 11 and B 11 The reference voltage line Ref.1(A) provides the reference voltage and the second sub-pixel R to the second pixel. 12 W 12 G 12 and B 12 A reference voltage line Ref.1(B) provides a reference voltage, and a switching is performed to selectively sense the first sub-pixel R. 11 W 11 G 11 and B 11 With the second sub-pixel R 12 W 12 G 12 and B 12 One of the characteristics.

[0233] As an example, the first sensing switch 821 can selectively sense the characteristics of a sub-pixel of one of the first and second pixels. For example, the first sensing switch 821 can selectively sense the characteristics of the first sub-pixel R. 11 W 11 G 11 and B 11 and the second sub-pixel R 12 W 12 G 12 and B 12 One of the characteristics of the middle.

[0234] Furthermore, the sensing switch 820 may include a second sensing switch 822, which is connected to the third sub-pixel R of the third pixel. 13 W 13 G 13 and B 13 The reference voltage line Ref.2(A) provides the reference voltage and the fourth sub-pixel R to the fourth pixel. 14 W 14 G 14 and B 14 A reference voltage line Ref.2(B) provides a reference voltage, and a switching is performed to selectively sense the third sub-pixel R. 13 W 13 G 13 and B 13 With the fourth sub-pixel R 14 W 14 G 14 and B 14 One of the characteristics.

[0235] As an example, the second sensing switch 822 can selectively sense the characteristics of a sub-pixel of one of the third and fourth pixels. For instance, the second sensing switch 822 can selectively sense the characteristics of the third sub-pixel R. 13 W 13 G 13 and B 13 and the fourth sub-pixel R 14 W 14 G 14 and B 14 One of the characteristics.

[0236] According to an example implementation, reference voltage line Ref.1(A) provides a reference voltage to the first sub-pixel R. 11 W 11 G 11 and B 11 And from the first sub-pixel R 11 W 11 G 11 and B 11 Each sensing characteristic is provided to the first sensing channel terminal SIO1.

[0237] Furthermore, from the first sub-pixel R 11 W 11 G 11 and B 11 Each sensed characteristic is transmitted via data driver 120 to timing controller 140 (see...). Figure 1 )(For example, Figure 3The compensator 320). The timing controller 140 (see...) Figure 1 )(For example, Figure 3 The compensator 320) identifies the first sub-pixel R 11 W 11 G 11 and B 11 Each sensed characteristic is used to calculate a compensation value, and the calculated compensation value is stored in memory 310 (see...). Figure 3 ).

[0238] Subsequently, the timing controller 140 (see Figure 1 The stored compensation value is reflected in the second sub-pixel R via the data driver 120. 12 W 12 G 12 and B 12 In the compensation value.

[0239] In this manner, the first sensing switch 821 is operated to select from the first sub-pixel R 11 W 11 G 11 and B 11 The characteristics of each sensed element are reflected in the second sub-pixel R. 12 W 12 G 12 and B 12 The compensation value is included, and the sensing signal is transmitted to the first sensing switch 821 through the sensing line 841.

[0240] For example, when the first sub-pixel R of the first pixel of the display panel 110 11 W 11 G 11 and B 11 When the characteristics are flawless, it will be based on the first sub-pixel R 11 W 11 G 11 and B 11 The compensation value of the characteristic is applied to the second sub-pixel R of the second pixel. 12 W 12 G 12 and B 12 The compensation value. The display panel 110 according to this disclosure can also apply compensation in the opposite case.

[0241] For example, when the first sub-pixel R of the first pixel of the display panel 110 11 W 11 G 11 and B 11When the characteristics of the device are defective, the reference voltage can be transferred to the first reference voltage line Ref.1 and the second reference voltage line Ref.2. For example, when the first sub-pixel R of the first pixel of the display panel 110 is defective... 11 W 11 G 11 and B 11 When the characteristics of the second pixel are defective, the second sub-pixel R of the second pixel can be... 12 W 12 G 12 and B 12 The characteristic is applied to the first sub-pixel R of the first pixel. 11 W 11 G 11 and B 11 The compensation value is, but not limited to, that.

[0242] According to an example implementation, reference voltage line Ref.2(A) provides a reference voltage to the third sub-pixel R. 13 W 13 G 13 and B 13 And from the third sub-pixel R 13 W 13 G 13 and B 13 The characteristics of each sensed feature are provided to the second sense channel terminal SIO2.

[0243] Furthermore, from the third sub-pixel R 13 W 13 G 13 and B 13 Each sensed characteristic is transmitted via data driver 120 to timing controller 140 (see...). Figure 3 )(For example, Figure 3 The compensator 320). The timing controller 140 (see...) Figure 1 )(For example, Figure 3 The compensator 320) identifies the third sub-pixel R 13 W 13 G 13 and B 13 Each sensed characteristic is used to calculate a compensation value, and the calculated compensation value is stored in memory 310 (see...). Figure 3 ).

[0244] Subsequently, the timing controller 140 (see Figure 1 The stored compensation value is reflected in the fourth sub-pixel R via the data driver 120. 14 W 14 G 14 and B 14 In the compensation value.

[0245] In this way, the second sensing switch 822 is operated to select from the third sub-pixel R 13 W 13 G 13 and B 13 Each sensed characteristic is reflected in the fourth sub-pixel R 14 W 14 G 14 and B 14 The compensation value is included, and the sensing signal is transmitted to the second sensing switch 822 through the sensing line 841.

[0246] For example, when the third sub-pixel R of the third pixel of the display panel 110 13 W 13 G 13 and B 13 When the characteristics are flawless, it will be based on the third sub-pixel R 13 W 13 G 13 and B 13 The compensation value of the characteristic is applied to the fourth sub-pixel R of the fourth pixel. 14 W 14 G 14 and B 14 The compensation value. The display panel 110 according to this disclosure can also apply compensation in the opposite case.

[0247] For example, when the third sub-pixel R of the third pixel of the display panel 110 13 W 13 G 13 and B 13 When the characteristics of the fourth pixel are defective, the fourth sub-pixel R of the fourth pixel can be... 14 W 14 G 14 and B 14 The characteristic is applied to the third sub-pixel R of the third pixel. 13 W 13 G 13 and B 13 The compensation value is, but not limited to, that.

[0248] According to one example implementation, the drive switch 830 may include a first drive switch 831 that switches the path along which a reference voltage line, either the first reference voltage line Ref.1(A) or the first reference voltage line Ref.1(B), is transmitted to drive the first reference voltage line Ref.1(A) and the first reference voltage line Ref.1(B) respectively, thereby selectively operating the first sub-pixel R of the first pixel. 11 W 11 G 11 and B 11And the second sub-pixel R of the second pixel 12 W 12 G 12 and B 12 .

[0249] In this manner, the first drive switch 831 drives the first reference voltage line Ref.1(A) and the first reference voltage line Ref.1(B) respectively, thereby selectively operating the first sub-pixel R. 11 W 11 G 11 and B 11 With the second sub-pixel R 12 W 12 G 12 and B 12 One of them, and transmits the drive signal to the first drive switch 831 through the drive line 842.

[0250] For example, the first drive switch 831 is based on the first sub-pixel R of the first pixel of the display panel 110. 11 W 11 G 11 and B 11 And the second sub-pixel R of the second pixel 12 W 12 G 12 and B 12 The characteristic of selectively operating the first sub-pixel R 11 W 11 G 11 and B 11 Or the second sub-pixel R 12 W 12 G 12 and B 12 However, it is not limited to this.

[0251] When the first sub-pixel R of the first pixel of the display panel 110 11 W 11 G 11 and B 11 When at least one of the characteristics is defective, the first sensing switch 821 is turned off, causing the first sub-pixel R of the first pixel to... 11 W 11 G 11 and B 11 No operation is performed, and the first drive switch 831 is turned on, causing the second sub-pixel R to... 12 W 12 G 12 and B 12 Perform the operation.

[0252] Furthermore, the drive switch 830 may include a second drive switch 832, which switches the path along which the reference voltage is transmitted to one of the second reference voltage lines Ref.2(A) and Ref.2(B) to drive the second reference voltage line Ref.2(A) and the second reference voltage line Ref.2(B) respectively, thereby selectively operating the third sub-pixel R of the third pixel. 13 W 13 G 13 and B 13 And the fourth sub-pixel R of the fourth pixel 14 W 14 G 14 and B 14 .

[0253] In this manner, the second drive switch 832 drives the second reference voltage line Ref.2(A) and the second reference voltage line Ref.2(B) respectively, thereby selectively operating the third sub-pixel R. 13 W 13 G 13 and B 13 With the fourth sub-pixel R 14 W 14 G 14 and B 14 One of them, and transmits the drive signal to the second drive switch 832 through the drive line 842.

[0254] For example, the second drive switch 832 is based on the third sub-pixel R of the third pixel of the display panel 110. 13 W 13 G 13 and B 13 And the fourth sub-pixel R of the fourth pixel 14 W 14 G 14 and B 14 The characteristic of selectively manipulating the third sub-pixel R 13 W 13 G 13 and B 13 Or the fourth sub-pixel R 14 W 14 G 14 and B 14 However, it is not limited to this.

[0255] When the third sub-pixel R of the third pixel of the display panel 110 13 W 13 G 13 and B 13 When at least one of the characteristics is defective, the second sensing switch 822 is turned off, causing the third sub-pixel R of the third pixel to... 13W 13 G 13 and B 13 No operation is performed, and the second drive switch 832 is turned on, causing the fourth sub-pixel R to... 14 W 14 G 14 and B 14 Perform the operation.

[0256] Figure 9 This is a circuit diagram of a first sub-pixel and a second sub-pixel that compensate for the characteristics of a second sub-pixel by means of a first sub-pixel, according to an exemplary embodiment of the present disclosure. Figure 10 It is used to describe Figure 9 Timing diagram driven by the sensor of the pixels.

[0257] Reference Figure 9 The driving operation of each sub-pixel is related to Figure 2 and Figure 3 The driving operations described herein are the same; therefore, for ease of description, the same technical descriptions will be omitted or given briefly.

[0258] According to one example implementation, the reference voltage V output from the power supply device can be... ref Provided to the reference voltage application node N ref And provide the reference voltage to the application node N ref Reference voltage V ref The reference voltage line Ref.1 (A) can be applied via the power switch SPRE.

[0259] According to one example implementation, the sampling switch SAM can control the connection between the analog-to-digital converter (ADC) and the reference voltage line Ref.1(A). When the ADC is connected to the reference voltage line Ref.1(A) via the sampling switch SAM, the ADC can convert the voltage (analog voltage) of the connected reference voltage line Ref.1(A) into a sensed value corresponding to a digital value.

[0260] According to one example implementation, the analog-to-digital converter (ADC) can direct the signal to the compensator 320 (see...). Figure 3 The compensator 320 provides sensing data, including the sensed values. Based on the sensing data, the compensator 320 identifies the first sub-pixel R of the first pixel. 11 The characteristics of the light-emitting element OLED1 or driving transistor DRT included in the memory are used to calculate a compensation value, which is then stored in the memory 310. Furthermore, the compensation value stored in the memory 310 reflects the characteristics of the first sub-pixel R of the second pixel. 12 In the compensation.

[0261] Therefore, the first sensing switch 821 of the switching unit 810 is turned off, so that the first sub-pixel R of the first pixel will be switched off.11 The sensing characteristics are reflected in the first sub-pixel R of the second pixel. 12 In the compensation value. In this case, the first drive switch 831 of the switching unit 810 can be turned on or off.

[0262] In this way, when the first sub-pixel R of the first pixel 11 When the characteristics are without defects, based on the first sub-pixel R 11 The compensation value for the characteristics can be applied to the first sub-pixel R of the second pixel. 12 The compensation value.

[0263] Reference Figure 10 In order to extract the first sub-pixel R from the first pixel 11 The sensing characteristics are reflected in the first sub-pixel R of the second pixel. 12 In the compensation value, the first drive switch 831 can be turned on or off (it doesn't matter), and the first sensing switch 821 is off.

[0264] In addition, the sensing drive period may include an initialization period T. init Tracking period T track and sampling time period T sam .

[0265] Initialization period of the sensing drive period Tinit This is the period during which the first node N1 and the second node N2 of the driving transistor DRT are initialized. During the initialization period T... init During this period, the voltage V1 of the first node N1 of the driving transistor DRT can be initialized by the data signal used for sensing drive, and the voltage V2 of the second node N2 of the driving transistor DRT can be initialized by the reference voltage V used for sensing drive. ref initialization.

[0266] The sensing drive data signal is a data signal with a specific voltage value used for sensing drive. Typically, the data signal used for sensing drive can have a constant voltage value during a sensing drive period.

[0267] In other words, when the first sensing switch 821 is open, during the initialization period T... init During this period, the first sub-pixel R of the first pixel 11 The scanning transistor SCT1 and sensing transistor SENT1 can be turned on, and the power switch SPRE can be turned on. Conversely, the first sub-pixel R of the second pixel... 12 The scanning transistor SCT2 and the sensing transistor SENT2 are turned off.

[0268] Reference Figure 10 Tracking period T during the sensing-driven period trackIt is a period of time during which the threshold voltage (V) reflecting the driving transistor DRT is tracked. th The voltage V2 of the second node N2 of the driving transistor DRT, or the threshold voltage change.

[0269] During the tracking period T track During this period, the power switch SPRE can be turned on, or the sensing transistor SENT can be turned on. Therefore, the second node N2 of the driving transistor DRT can be in a state where the reference voltage V is no longer applied. ref The state of the second node N2 of the driving transistor DRT can be electrically floated.

[0270] During the tracking period T track During this period, the voltage V2 at the second node N2 of the driving transistor DRT may increase, and after a certain amount of time, the voltage V2 may stop increasing and may saturate. That is, as the tracking period T... track As the process continues, the voltage increase range of the second node N2 of the driving transistor DRT may decrease, and eventually the voltage V2 of the second node N2 of the driving transistor DRT may saturate.

[0271] When the voltage V2 at the second node N2 of the driving transistor DRT saturates, the sampling period T can begin. sam When the sampling switch SAM is turned on, the sampling period T can begin. sam .

[0272] As an example, in order to extract the first sub-pixel R from the first pixel 11 The sensed characteristics are reflected in the first sub-pixel R of the second pixel. 12 In the compensation value, when the characteristics of the sub-pixels of the first pixel are defect-free, the first sensing switch 821 is turned off.

[0273] As described above, in order to extract the first sub-pixel R from the first pixel 11 The sensing characteristics are reflected in the first sub-pixel R of the second pixel. 12 In the compensation value, the first drive switch 831 of the switch unit 810 can be turned on or off, and the first sensing switch 821 is turned off.

[0274] In this way, since the first sensing switch 821 is always off regardless of the operating state of the first driving switch 831, during the sampling period T... sam The first sub-pixel R of the first pixel of the first pixel 11 Sensing voltage V SEN1 Generated as sensing voltage V' SEN1 To apply to the first sub-pixel R of the second pixel 12 The compensation value.

[0275] Figure 11 This is a circuit diagram illustrating additional sensing of a second sub-pixel after the characteristics of the first sub-pixel have been compensated for by the characteristics of the second sub-pixel, according to an example embodiment of the present disclosure. Figure 12 It is used to describe Figure 11 Timing diagram driven by the sensor of the pixels.

[0276] Reference Figure 11 and Figure 12 The driving operation of each sub-pixel is related to Figure 2 , Figure 3 and Figure 9 The driving operations described herein are the same, therefore, for ease of description, the same technical descriptions will be omitted or briefly given.

[0277] Since the first sensing switch 821 is always off regardless of the operating state of the first driving switch 831, the first sub-pixel R of the first pixel is... 11 Sensing voltage V SEN1 The first sub-pixel R applied to the second pixel 12 The compensation value.

[0278] In the first sub-pixel R of the first pixel 11 Sensing voltage V SEN1 The first sub-pixel R applied to the second pixel 12 After the compensation value, the first sub-pixel R of the second pixel is additionally sensed relative to the reference voltage line Ref.1(B). 12 To improve image quality.

[0279] For the first sub-pixel R of the second pixel 12 With this additional sensing, the first drive switch 831 is turned off and the first sensing switch 821 is turned on.

[0280] In addition, the first sub-pixel R of the first pixel 11 The scanning transistor SCT1 and the sensing transistor SENT1 are turned off. Conversely, the first sub-pixel R of the second pixel is turned off. 12 The scanning transistor SCT2 and the sensing transistor SENT2 are turned on, and the power switch SPRE is turned off.

[0281] In this way, since the first drive switch 831 is off and the first sensing switch 821 is on, the first sub-pixel R of the first pixel is... 11 Sensing voltage V SEN1 Applied to the first sub-pixel R based on the second pixel 12 Sensing voltage V' SEN2 The compensation value.

[0282] As a result, the first sub-pixel R of the first pixel is...11 Sensing voltage V SEN1 Updated to the first sub-pixel R of the second pixel 12 The compensation value.

[0283] Figure 13 This is a circuit diagram of an exemplary embodiment of the present disclosure for driving the first reference voltage line Ref.1(A) and the first reference voltage line Ref.1(B) respectively when the characteristics of the first sub-pixel are defective. Figure 14 It is used to describe Figure 13 Timing diagram driven by the sensor of the pixels.

[0284] Reference Figure 13 and Figure 14 The driving operation of each sub-pixel is related to Figure 2 , Figure 3 and Figure 9 The driving operations described herein are the same, therefore, for ease of description, the same technical descriptions will be omitted or briefly given.

[0285] According to an example implementation, when the first sub-pixel R of the first pixel is provided with the first reference voltage line Ref.1(A) 11 When image quality issues occur (e.g., when the first sub-pixel R...), 11 When the characteristics are defective, the display panel 110 can sense the first sub-pixel R of the second pixel through the first reference voltage line Ref.1 (B). 12 And compensate the first sub-pixel R of the first pixel. 11 For example, when the first sub-pixel R of the first pixel 11 When the feature is defective, the sensing switch switches to ON to sense the first sub-pixel R of the second pixel. 12 .

[0286] According to one example implementation, the first drive switch 831 can drive the first reference voltage line Ref.1(A) and the first reference voltage line Ref.1(B) respectively, thereby selectively operating the first sub-pixel R. 11 W 11 G 11 and B 11 With the second sub-pixel R 12 W 12 G 12 and B 12 One of them. For example, the first drive switch 831 can switch the path along which the reference voltage is transmitted to one of the first reference voltage lines Ref.1(A) and Ref.1(B) to drive the first reference voltage line Ref.1(A) and Ref.1(B) respectively.

[0287] For example, when a defect occurs in the first reference voltage line Ref.1(A), or when a short circuit occurs between the anode and cathode of a sub-pixel of the first pixel, the second sub-pixel R can be driven by turning on the drive switch 831 through the first reference voltage line Ref.1(B). 12 W 12 G 12 and B 12 .

[0288] In this way, based on the first sub-pixel R 11 W 11 G 11 and B 11 The compensation value of each acquired feature is applied to the second sub-pixel R. 12 W 12 G 12 and B 12 The compensation value for each of them.

[0289] A display panel 110 according to an example embodiment of the present disclosure may include: a first pixel including a plurality of sub-pixels; a second pixel disposed at a position adjacent to the first pixel and including a plurality of sub-pixels; a first reference voltage line providing a reference voltage to the first pixel; a second reference voltage line providing a reference voltage to the second pixel; and a switching unit.

[0290] According to one example embodiment, the display panel 110 may further include: a sensing line that transmits a sensing signal for sensing characteristics of a first pixel to a sensing switch; and a driving line that transmits a driving signal for driving a first reference voltage line and a second reference voltage line to a driving switch, respectively.

[0291] According to one example implementation, the switching unit may include: at least one sensing switch connected to a first reference voltage line and a second reference voltage line to selectively sense the characteristics of a sub-pixel of one of the first pixel and the second pixel; and at least one driving switch that switches the path along which a reference voltage is transmitted to one of the first reference voltage lines and the second reference voltage line to drive the first reference voltage line and the second reference voltage line, respectively.

[0292] According to one example implementation, the switch unit may be located in a non-display area (e.g., a border area) of the display panel 110.

[0293] According to one example implementation, the sensing switch can remain in an OFF state, thereby applying the characteristics of the sub-pixels of the first pixel to the compensation value of the sub-pixels of the second pixel.

[0294] According to one example implementation, when the characteristics of a sub-pixel of the first pixel are defective, a sensing switch can be turned on to transmit a reference voltage to a first reference voltage line and a second reference voltage line.

[0295] According to one example implementation, when the characteristics of a sub-pixel of the first pixel are defective, the sensing switch can remain in the ON state, so that the characteristics of the sub-pixel of the second pixel are reflected in the compensation value of the sub-pixel of the first pixel.

[0296] According to one example implementation, when the characteristics of a sub-pixel of the first pixel are defective and the sensing switch switches from off to on, the drive switch can switch from on to off.

[0297] According to one example implementation, when the drive switch is switched from on to off, the characteristics of the second pixel can be applied to the compensation value of the sub-pixels of the first pixel.

[0298] According to one example implementation, the display panel 110 turns on a sensing switch and then sequentially senses and compensates the mobility of each sub-pixel of the scan signal line to compensate for the sub-pixel mobility and image quality, and identifies the defect type based on the sensed values. Furthermore, the display panel 110 can be driven by applying an algorithm and compensation value to each type of defect. Similarly, during the driving of the display panel 110, the display panel 110 is driven by sensing and compensating the mobility of all sub-pixels of the random scan signal line, identifying the defect type based on the sensed values, applying an algorithm and compensation value to each type of defect. Subsequently, the threshold voltage of each sub-pixel of the scan signal line is sequentially sensed and compensated, and the defect type is determined based on the sensed values. Furthermore, the display panel 110 applies an algorithm to each type of defect and stores the compensation value in memory. However, when the reference voltage line is defective, image quality degradation occurs.

[0299] The following describes a method for driving a display panel, which prevents image quality degradation even when the reference voltage is defective.

[0300] Figure 15 This is a flowchart illustrating a process for compensating for subpixel mobility and image quality by turning on a sensing switch after the display panel is powered on, according to an example embodiment of the present disclosure.

[0301] In the following text, refer to Figure 15 The process of compensating for subpixel mobility and image quality by turning on the display panel and then turning on the sensing switch according to embodiments of the present disclosure will now be described in detail.

[0302] According to one example implementation, the display panel 110 can turn on the sensing switch and turn off the drive switch (S1510). The display panel 110 can turn on sensing switches 821 and 822 (see...). Figure 8 And disconnect the drive switch to identify sub-pixels with poor image quality, and compensate for the mobility and image quality of that sub-pixel.

[0303] According to one example implementation, the display panel 110 can select a predetermined number of scan signal lines and sense the mobility of sub-pixels on each of the first reference voltage line and the second reference voltage line (S1512). The display panel 110 can select random scan signal lines (e.g., 1 to 5 lines) from a plurality of scan signal lines disposed on the display panel 110, and sense the mobility of sub-pixels on each of the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)) for each scan line. For example, scan signal lines (e.g., 1 to 5 lines) can be randomly selected.

[0304] According to one example implementation, the display panel 110 can calculate a degradation deviation threshold Value based on the sensed value of each of the first and second reference voltage lines, and compare the calculated threshold Value with the threshold voltage V. TH_Mob The magnitudes are compared (S1514). The display panel 110 can calculate a degradation threshold Value A based on the sensed value of a first reference voltage line (e.g., Ref. (A)) and a degradation threshold Value B based on the sensed value of a second reference voltage line (e.g., Ref. (B)). Furthermore, the display panel 110 can calculate a degradation deviation threshold (Value = Value A - Value B) based on the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)). For example, the display panel 110 can calculate the degradation deviation threshold (Value = Value A - Value B) by subtracting the threshold Value B based on the second reference voltage line (e.g., Ref. (B)) from the threshold Value A of the first reference voltage line (e.g., Ref. (A)). Additionally, the display panel 110 can compare the magnitude of the calculated threshold Value with a threshold voltage V based on mobility. TH_Mob The sizes are compared.

[0305] According to one example implementation, when the threshold Value is lower than the threshold voltage V TH_Mob At this time, the display panel 110 can disconnect the sensing switch (S1516, S1518).

[0306] According to one example implementation, the display panel 110 can sequentially sense the mobility of sub-pixels on a first reference voltage line for a predetermined number of scan signal lines, and reflect the sensed mobility in the predicted value of sub-pixels on a second reference voltage line (S1520). After the sensing switch is turned off, the display panel 110 can sequentially sense the mobility of sub-pixels on each of a predetermined number (e.g., 1 to 5) of scan signal lines (e.g., Ref. (A)), and reflect the sensed mobility in the predicted value of sub-pixels on a second reference voltage line (e.g., Ref. (B)). For example, the display panel 110 can copy the mobility of sub-pixels on the first reference voltage line (e.g., Ref. (A)) to the sub-pixels on the second reference voltage line (e.g., Ref. (B)), or apply the aforementioned mobility as a weight.

[0307] In addition, the display panel 110 can sequentially sense the mobility of sub-pixels on the first reference voltage line (e.g., Ref. (A)) for the remaining scan signal lines of the display panel, and copy the sensed mobility to the sub-pixels on the second reference voltage line (e.g., Ref. (B)), or apply the aforementioned mobility as a weight.

[0308] According to one example implementation, when the threshold Value is higher than or equal to the threshold voltage V TH_Mob At this time, the display panel 110 can sequentially sense the mobility of sub-pixels on each of the first and second reference voltage lines for a predetermined number of scan signal lines (S1516, S1522). When the threshold Value calculated in operation S1514 is higher than or equal to the threshold voltage V based on the mobility... TH_Mob At that time, the display panel 110 can sequentially sense the mobility of sub-pixels on a first reference voltage line (e.g., Ref. (A)) and a second reference voltage line (e.g., Ref. (B)) for each of a predetermined number (e.g., 1 to 5) of scan signal lines.

[0309] According to one example implementation, the display panel 110 may disconnect the sensing switches (S1524). The display panel 110 may sequentially sense the mobility of sub-pixels on a first reference voltage line (e.g., Ref. (A)) for each of a predetermined number (e.g., 1 to 5) of scan signal lines, and then disconnect the sensing switches 821 and 822.

[0310] According to one example implementation, the display panel 110 can identify the defect type based on the sensed value (S1526). The display panel 110 can identify the defect type of each sub-pixel in a predetermined number of scan signal lines based on the sensed value.

[0311] According to one example implementation, the display panel 110 can apply an algorithm for each type of defect (S1528). The display panel 110 can apply the algorithm according to the defect type of the image quality of the sub-pixel (e.g., bright lines, dark lines, dark spots, etc. in the image quality).

[0312] According to one example implementation, the display panel 110 may apply a mobility compensation value (S1530). The display panel 110 may reflect the compensation value based on the mobility of the sub-pixels on the first reference voltage line (e.g., Ref. (A)) in the compensation of the sub-pixels corresponding to the second reference voltage line (e.g., Ref. (B)).

[0313] According to one example implementation, when the drive switch flag is true, the display panel 110 can turn on the drive switch to drive the reference voltage line independently, and when the drive switch flag is false, the display panel 110 can turn off the drive switch to perform normal driving (S1532). When the drive switch flag is true, the display panel 110 can turn on drive switches 831 and 832 to drive the reference voltage line independently, and when the drive switch flag is false, the display panel 110 can turn off drive switches 831 and 832 to perform normal driving.

[0314] In this manner, the display panel 110 according to this disclosure can determine sub-pixels with poor image quality by turning on a sensing switch, and then use a driving switch to drive the reference voltage line individually, thereby ensuring that the image quality degradation is at the same level as the image quality degradation of SRD. For example, the display panel 110 can turn on a sensing switch to sense the mobility of sub-pixels on each of the first and second reference voltage lines.

[0315] Figure 16 This is a flowchart illustrating a process of real-time compensation of mobility and image quality by turning on a sensing switch while driving a display panel, according to an example embodiment of the present disclosure.

[0316] In the following text, refer to Figure 16 The process of real-time compensation of mobility and image quality by turning on a sensing switch while driving a display panel, according to an example embodiment of the present disclosure, will now be described in detail.

[0317] According to one example implementation, the display panel 110 can sense the mobility of all sub-pixels in the random scan signal line (S1610). The display panel 110 can sense the mobility of each of all sub-pixels corresponding to the random scan signal line.

[0318] According to one example implementation, the display panel 110 can identify the defect type based on the sensed values ​​(S1612). The display panel 110 can determine which sub-pixel has poor image quality and identify the defect type based on the mobility of each of all sensed sub-pixels.

[0319] According to one example implementation, the display panel 110 can apply an algorithm for each type of defect (S1614). The display panel 110 can apply the algorithm according to the type of image quality defect of the sub-pixel (e.g., bright lines, dark lines, dark spots, etc. in image quality).

[0320] According to one example implementation, the display panel 110 can be driven by applying a mobility compensation value (S1616). The display panel 110 can adjust the compensation value of sub-pixels with poor image quality in real time based on the mobility of all sensed sub-pixels. This compensation is performed in each of all sub-pixels according to each scan signal line of the display panel 110.

[0321] As described above, the display panel 110 according to this disclosure can drive the reference voltage line individually by sensing the sub-pixels and the data lines.

[0322] Figure 17 This is a flowchart illustrating a process for compensating for the threshold voltage of subpixels and image quality after a power outage of a display panel, according to an example embodiment of the present disclosure.

[0323] In the following text, the following references will be made. Figure 17 This disclosure describes in detail a process for compensating for the threshold voltage of subpixels and image quality after a power outage of a display panel, according to an example embodiment of the present disclosure.

[0324] According to one example implementation, the display panel 110 can turn on the sensing switch and turn off the drive switch (S1710). The display panel 110 can turn on sensing switches 821 and 822 (see...). Figure 8 And disconnect the drive switch to identify sub-pixels with poor image quality, and compensate the threshold voltage and image quality of the sub-pixel.

[0325] According to one example implementation, the display panel 110 can select a predetermined number of scan signal lines and sense the threshold voltage of a sub-pixel on each of the first reference voltage line and the second reference voltage line (S1712). The display panel 110 can select random scan signal lines (e.g., 1 to 5 lines) from a plurality of scan signal lines disposed on the display panel 110, and sense the threshold voltage (V) of a sub-pixel on each of the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)) for each scan line. THFor example, the scan signal lines can be randomly selected (e.g., 1 channel with 5 lines).

[0326] According to one example implementation, the display panel 110 can calculate a degradation deviation threshold Value based on the sensed value of each of the first and second reference voltage lines, and compare the calculated threshold Value with the threshold voltage V. TH_Phi The magnitudes are compared (S1714). The display panel 110 can calculate a degradation threshold Value A based on the sensed value of the first reference voltage line (e.g., Ref. (A)) and a degradation threshold Value B based on the sensed value of the second reference voltage line (e.g., Ref. (B)). Furthermore, the display panel 110 can calculate a threshold (Value = Value A - Value B) based on the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (Ref. (B)). For example, the display panel 110 can calculate a degradation deviation threshold (Value = Value A - Value B) obtained by subtracting the threshold Value B based on the second reference voltage line (e.g., Ref. (B)) from the threshold Value A of the first reference voltage line (e.g., Ref. (A)). Furthermore, the display panel 110 can compare the calculated threshold Value with a set threshold voltage V. TH_Phi The sizes are compared.

[0327] According to one example implementation, when the threshold Value is lower than the threshold voltage V TH_Phi At this time, the display panel 110 can disconnect the sensing switch (S1716, S1718).

[0328] According to one example implementation, the display panel 110 can sequentially sense the threshold voltage of a sub-pixel on a first reference voltage line for a predetermined number of scan signal lines, and reflect the sensed threshold voltage in the predicted value of the sub-pixel on a second reference voltage line (S1720). After the sensing switch is turned off, the display panel 110 can sequentially sense the threshold voltage of a sub-pixel on each of a predetermined number (e.g., 1 to 5) of scan lines, and reflect the sensed threshold voltage in the predicted value of the sub-pixel on a second reference voltage line (e.g., Ref. (B)). For example, the display panel 110 can copy the threshold voltage of the sub-pixel on the first reference voltage line (e.g., Ref. (A)) to the sub-pixel on the first reference voltage line (e.g., Ref. (A)), or apply the threshold voltage as a weight.

[0329] According to one example implementation, when the threshold Value is higher than or equal to the threshold voltage V TH_PhiAt this time, the display panel 110 can sequentially sense the threshold voltage of the sub-pixel on each of the first reference voltage line and the second reference voltage line for a predetermined number of scan signal lines (S1716, S1722). When the threshold Value calculated in operation S1714 is higher than or equal to the threshold voltage V TH_Phi At that time, the display panel 110 can sequentially sense the threshold voltage of the sub-pixel on the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)) for each of a predetermined number (e.g., 1 to 5) of the scan signal lines.

[0330] According to one example implementation, the display panel 110 can disconnect the sensing switches (S1724). The display panel 110 can sequentially sense the threshold voltage of the sub-pixel on the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)) for each of a predetermined number (e.g., 1 to 5) of scan signal lines, and then disconnect the sensing switches 821 and 822.

[0331] According to one example implementation, the display panel 110 can identify the defect type based on the sensed value (S1726). The display panel 110 can identify the defect type of a sub-pixel for each of a predetermined number of scan signal lines based on the sensed value.

[0332] According to one example implementation, the display panel 110 can determine whether a line or sub-pixel is defective, and set the flags of drive switches 831 and 832 to true when the line or sub-pixel is defective, or set the flags of drive switches 831 and 832 to false when the line or sub-pixel is not defective (S1728). When the line is defective (e.g., a defect, etc.) or the image quality of the sub-pixel is poor, the display panel 110 can set the flags of drive switches 831 and 832 to true. Alternatively, when the line is not defective (e.g., a defect, etc.) or the image quality of the sub-pixel is good, the display panel 110 can set the flags of drive switches 831 and 832 to false.

[0333] According to one example implementation, the display panel 110 can apply an algorithm for each type of defect (S1730). The display panel 110 can apply the algorithm according to the type of image quality defect of the sub-pixel (e.g., bright lines, dark lines, dark spots, etc. in image quality).

[0334] According to one example implementation, the display panel 110 can compensate for threshold voltage and store flag values ​​(S1732). The display panel 110 can compensate for the threshold voltage of sub-pixels and store flags (e.g., true or false) of the driving switches 831 and 832 in NAND memory (not shown).

[0335] As described above, the display panel 110 according to this disclosure can determine sub-pixels with poor image quality by turning on a sensing switch, and drive the display panel using a driving switch. Therefore, the image quality of the display panel 110 can be compensated.

[0336] Figure 18 This is a flowchart illustrating a process for compensating for subpixel mobility and image quality by turning on a sensing switch of the display panel and turning off a driving switch of the display panel according to an exemplary embodiment of the present disclosure.

[0337] In the following text, the following references will be made. Figure 18 This invention describes in detail a process for compensating for subpixel mobility and image quality after the sensing switch of the display panel is turned on and the driving switch of the display panel is turned off, according to an example embodiment of the present disclosure.

[0338] According to one example implementation, the display panel 110 can turn on the sensing switch and turn off the drive switch (S1810). The display panel 110 can turn on sensing switches 821 and 822 (see...). Figure 8 And disconnect the drive switch to identify sub-pixels with poor image quality, and compensate for the mobility and image quality of that sub-pixel.

[0339] According to one example implementation, the display panel 110 can select a predetermined number of scan signal lines and sense the mobility of sub-pixels on each of the first reference voltage line and the second reference voltage line (S1812). The display panel 110 can select random scan signal lines (e.g., 1 to 5 lines) from a plurality of scan signal lines disposed on the display panel 110, and sense the mobility of sub-pixels on each of the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)) for each scan line. For example, scan signal lines (e.g., 1 to 5 lines) can be randomly selected.

[0340] According to one example implementation, the display panel 110 can calculate a degradation deviation threshold Value based on the sensed value of each of the first and second reference voltage lines, and compare the calculated threshold Value with the threshold voltage V. TH_MobThe magnitudes are compared (S1814). The display panel 110 can calculate a degradation threshold Value A based on the sensed value of the first reference voltage line (e.g., Ref. (A)) and a degradation threshold Value B based on the sensed value of the second reference voltage line (e.g., Ref. (B)). Furthermore, the display panel 110 can calculate a degradation deviation threshold (Value = Value A - Value B) based on the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)). For example, the display panel 110 can calculate a degradation deviation threshold (Value = Value A - Value B) obtained by subtracting the threshold Value B based on the second reference voltage line (e.g., Ref. (B)) from the threshold Value A of the first reference voltage line (e.g., Ref. (A)). Furthermore, the display panel 110 can compare the calculated threshold Value with a threshold voltage V based on mobility. TH_Mob The sizes are compared.

[0341] According to one example implementation, when the threshold Value is lower than the threshold voltage V TH_Mob At this time, the display panel 110 can disconnect the sensing switch (S1816, S1818).

[0342] According to one example implementation, the display panel 110 can sequentially sense the mobility of sub-pixels on a first reference voltage line for a predetermined number of scan signal lines, and reflect the sensed mobility in the predicted value of sub-pixels on a second reference voltage line (S1820). After the sensing switch is turned off, the display panel 110 can sequentially sense the mobility of sub-pixels on each of a predetermined number (e.g., 1 to 5) of scan signal lines of the display panel, for example, and reflect the sensed mobility in the predicted value of sub-pixels on a second reference voltage line (e.g., Ref. (B)). For example, the display panel 110 can copy the mobility of sub-pixels on the first reference voltage line (e.g., Ref. (A)) to the sub-pixels on the second reference voltage line (e.g., Ref. (B)), or apply the aforementioned mobility as a weight.

[0343] In addition, the display panel 110 can sequentially sense the mobility of sub-pixels on the first reference voltage line (e.g., Ref. (A)) for the remaining scan signal lines of the display panel, and copy the sensed mobility to the sub-pixels on the second reference voltage line (e.g., Ref. (B)), or apply the aforementioned mobility as a weight.

[0344] According to one example implementation, when the threshold Value is higher than or equal to the threshold voltage V TH_MobAt this time, the display panel 110 can sequentially sense the mobility of sub-pixels on each of the first and second reference voltage lines for a predetermined number of scan signal lines (S1816, S1822). When the threshold Value calculated in operation S1514 is higher than or equal to the threshold voltage V based on the mobility... TH_Mob At that time, the display panel 110 can sequentially sense the mobility of sub-pixels on a first reference voltage line (e.g., Ref. (A)) and a second reference voltage line (e.g., Ref. (B)) for each of a predetermined number (e.g., 1 to 5) of scan signal lines.

[0345] According to one example implementation, the display panel 110 may disconnect the sensing switches (S1824). The display panel 110 may sequentially sense the mobility of sub-pixels on a first reference voltage line (e.g., Ref. (A)) for each of a predetermined number (e.g., 1 to 5) of scan signal lines, and then disconnect the sensing switches 821 and 822.

[0346] According to one example implementation, the display panel 110 can identify the defect type based on the sensed value (S1826). The display panel 110 can identify the defect type of each sub-pixel in a predetermined number of scan signal lines based on the sensed value.

[0347] According to one example implementation, the display panel 110 can apply an algorithm for each type of defect (S1828). The display panel 110 can apply the algorithm according to the type of image quality defect of the sub-pixel (e.g., bright lines, dark lines, dark spots, etc. in image quality).

[0348] According to one example implementation, the display panel 110 may apply a mobility compensation value (S1830). The display panel 110 may reflect the compensation value based on the mobility of the sub-pixels on the first reference voltage line (e.g., Ref. (A)) in the compensation of the sub-pixels corresponding to the second reference voltage line (e.g., Ref. (B)).

[0349] According to one example implementation, the display panel 110 can turn on a drive switch and drive these reference voltage lines individually (S1832). The display panel 110 can turn on a drive switch to drive these reference voltage lines individually without detecting sub-pixels and identifying data lines.

[0350] In this way, the display panel 110 according to this disclosure can turn on the sensing switches 821 and 822, turn off the drive switches 831 and 832, identify sub-pixels with poor image quality, and turn off the sensing switches 821 and 822 to drive the reference voltage line separately without detecting the sub-pixels and data lines, thereby ensuring that the image quality is at the same level as the image quality of the SRD.

[0351] Figure 19 This is a flowchart illustrating a process of real-time compensation of mobility and image quality by turning on a sensing switch while driving a display panel, according to an example embodiment of the present disclosure.

[0352] In the following text, the following references will be made. Figure 19 This invention describes in detail a process for real-time compensation of mobility and image quality by turning on a sensing switch while driving a display panel, according to an example embodiment of the present disclosure.

[0353] According to one example implementation, the display panel 110 can sense the mobility of all sub-pixels on the random scan signal line (S1910). The display panel 110 can sense the mobility of each of all sub-pixels corresponding to the random scan signal line.

[0354] According to one example implementation, the display panel 110 can identify the defect type based on the sensed values ​​(S1912). The display panel 110 can determine which sub-pixel has poor image quality and identify the defect type based on the mobility of each of all sensed sub-pixels.

[0355] According to one example implementation, the display panel 110 can apply an algorithm for each type of defect (S1914). The display panel 110 can apply the algorithm according to the type of image quality defect of the sub-pixel (e.g., bright lines, dark lines, dark spots, etc. in image quality).

[0356] According to one example implementation, the display panel 110 can be driven by applying a mobility compensation value (S1916). The display panel 110 can adjust the compensation value of sub-pixels with poor image quality in real time based on the mobility of all sensed sub-pixels. This compensation is performed in each of all sub-pixels according to each scan signal line of the display panel 110.

[0357] As described above, the display panel 110 according to this disclosure can always drive the reference voltage line independently without needing to identify the sensing of sub-pixels and the sensing of data lines.

[0358] Figure 20 This is a flowchart illustrating a process for compensating for the threshold voltage of subpixels and image quality after a power outage of a display panel, according to an example embodiment of the present disclosure.

[0359] In the following text, the following references will be made. Figure 20 This disclosure describes in detail a process for compensating for the threshold voltage of subpixels and image quality after a power outage of a display panel, according to an example embodiment of the present disclosure.

[0360] According to one example implementation, the display panel 110 can turn on the sensing switch and turn off the drive switch (S2010). The display panel 110 can turn on sensing switches 821 and 822 (see...). Figure 8 And disconnect the drive switch to identify sub-pixels with poor image quality, and compensate the threshold voltage and image quality of the sub-pixel.

[0361] According to one example implementation, the display panel 110 can select a predetermined number of scan signal lines and sense the threshold voltage of a sub-pixel on each of the first reference voltage line and the second reference voltage line (S2012). The display panel 110 can select random scan signal lines (e.g., 1 to 5 lines) from a plurality of scan signal lines disposed on the display panel 110, and sense the threshold voltage (V) of the sub-pixel on the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)) for each scan line. TH ).

[0362] According to one example implementation, the display panel 110 can calculate a degradation deviation threshold Value based on the sensed value of each of the first and second reference voltage lines, and compare the calculated threshold Value with the threshold voltage V. TH_Phi The magnitudes are compared (S2014). The display panel 110 can calculate a degradation threshold Value A based on the sensed value of the first reference voltage line (e.g., Ref. (A)) and a degradation threshold Value B based on the sensed value of the second reference voltage line (e.g., Ref. (B)). Furthermore, the display panel 110 can calculate a degradation deviation threshold (Value = Value A - Value B) obtained by subtracting the threshold Value B based on the second reference voltage line (e.g., Ref. (B)) from the threshold Value A of the first reference voltage line (e.g., Ref. (A)). Additionally, the display panel 110 can compare the calculated threshold Value with a set threshold voltage V. TH_Phi The sizes are compared.

[0363] According to one example implementation, when the threshold Value is lower than the threshold voltage V TH_Phi At this time, the display panel 110 can disconnect the sensing switch (S2016, S2018).

[0364] According to one example implementation, the display panel 110 can sequentially sense the threshold voltage of a sub-pixel on a first reference voltage line for a predetermined number of scan signal lines, and reflect the sensed threshold voltage in the predicted value of the sub-pixel on a second reference voltage line (S2020). After the sensing switch is turned off, the display panel 110 can sequentially sense the threshold voltage of a sub-pixel on each of a predetermined number (e.g., 1 to 5) of scan signal lines, for example, and reflect the sensed threshold voltage in the predicted value of the sub-pixel on the second reference voltage line (e.g., Ref. (B)). For example, the display panel 110 can copy the threshold voltage of the sub-pixel on the first reference voltage line (e.g., Ref. (A)) to the sub-pixel on the first reference voltage line (e.g., Ref. (A)), or apply the threshold voltage as a weight.

[0365] According to one example implementation, when the threshold Value is higher than or equal to the threshold voltage V TH_Phi At this time, the display panel 110 can sequentially sense the threshold voltage of the sub-pixel on each of the first reference voltage line and the second reference voltage line for a predetermined number of scan signal lines (S2016, S2022). When the threshold Value calculated in operation S1714 is higher than or equal to the threshold voltage V TH_Phi At that time, the display panel 110 can sequentially sense the threshold voltage of the sub-pixel on the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)) for each of a predetermined number (e.g., 1 to 5) of the scan signal lines.

[0366] According to one example implementation, the display panel 110 may disconnect the sensing switches (S2024). The display panel 110 may sequentially sense the threshold voltage of the sub-pixel on the first reference voltage line (e.g., Ref. (A)) and the second reference voltage line (e.g., Ref. (B)) for each of a predetermined number (e.g., 1 to 5) of scan signal lines, and then disconnect the sensing switches 821 and 822.

[0367] According to one example implementation, the display panel 110 can identify the defect type based on the sensed values ​​(S2026). The display panel 110 can identify the defect type of a sub-pixel for each of a predetermined number of scan signal lines based on the sensed values.

[0368] According to one example implementation, the display panel 110 can apply an algorithm for each type of defect (S2028). The display panel 110 can apply the algorithm according to the type of image quality defect of the sub-pixel (e.g., bright lines, dark lines, dark spots, etc. in image quality).

[0369] According to one example implementation, the display panel 110 can store a compensation value for the threshold voltage (S2030). The display panel 110 can store the compensation value of the threshold voltage of the sub-pixel in a NAND memory (not shown).

[0370] As described above, the display panel 110 according to this disclosure can determine sub-pixels with poor image quality by turning on a sensing switch, and drive the display panel using a driving switch. Therefore, the image quality of the display panel 110 can be compensated.

[0371] According to one example embodiment, a method for driving a display device according to the present disclosure may include: a first process of performing a switching via a sensing switch to selectively sense the characteristics of a sub-pixel of one of a first pixel and a second pixel; and a second process of switching via a driving switch the path along which a reference voltage is transmitted to one of a first reference voltage line and a second reference voltage line to drive the first reference voltage line and the second reference voltage line of a plurality of reference voltage lines respectively.

[0372] According to one example implementation, the first process may include activating a sensing switch when a characteristic of a sub-pixel of the first pixel is defective, thereby transmitting a reference voltage to a first reference voltage line and a second reference voltage line.

[0373] According to one example implementation, the second process may include reflecting the characteristics of the sub-pixels of the second pixel in the compensation value of the sub-pixels of the first pixel while the sensing switch remains on, and separately driving the first reference voltage line and the second reference voltage line by switching the drive switch from on to off when the sensing switch switches from off to on.

[0374] As described above, since the display panel 110 according to this disclosure can sense the first sub-pixel of the first pixel (e.g., R) through the sensing switch 821, 11 The characteristics of the second pixel are reflected in the first sub-pixel of the second pixel (e.g., R). 12 In the compensation value, or in the first sub-pixel of the sensed second pixel (e.g., R), 12 The characteristics of the sensed feature are reflected in the first sub-pixel of the first pixel (e.g., R). 11 The compensation value can be shared with the source driver IC, and the cost can be reduced by reducing the number of sensing channels.

[0375] Furthermore, since the display panel 110 according to this disclosure can be designed as a single bundle structure for two reference voltage lines (e.g., Ref.1(A) and Ref.1(B)) by driving switch 831, and the path along which the reference voltage is transmitted to one of the first reference voltage lines disposed in the first pixel and the second reference voltage line disposed in the second pixel can be switched, the compensation time can be shortened and the image quality can be improved.

[0376] Furthermore, since the display panel 110 according to this disclosure arranges the switching unit, which includes at least one sensing switch and at least one driving switch, in the non-display area (e.g., the bezel area or edge area) of the display panel 110, the width of the bezel of the data pad portion can be prevented from increasing.

[0377] Although exemplary embodiments of the present disclosure have been described in more detail with reference to the accompanying drawings, the present disclosure is not necessarily limited to these embodiments, and various modifications can be made without departing from the technical spirit of the present disclosure. Therefore, the exemplary embodiments disclosed herein are not intended to limit the technical spirit of the present disclosure, but rather to describe it, and the scope of the technical spirit of the present disclosure is not limited by these embodiments. Therefore, it should be understood that the above embodiments are illustrative and not restrictive in all respects. The scope of the present disclosure should be interpreted in accordance with the appended claims, and all technical spirit within the equivalent scope should be interpreted as included within the scope of the present disclosure.

Claims

1. A display panel, the display panel comprising: The first pixel includes multiple sub-pixels; The second pixel is located adjacent to the first pixel and includes multiple sub-pixels; A first reference voltage line provides a reference voltage to the first pixel; A second reference voltage line provides a reference voltage to the second pixel; as well as A switching unit, connected to the first reference voltage line and the second reference voltage line, performs switching to selectively sense the characteristics of a sub-pixel of one of the first pixel and the second pixel, and switches the path along which the reference voltage is transmitted to one of the first reference voltage lines and the second reference voltage line to drive the first reference voltage line and the second reference voltage line respectively.

2. The display panel according to claim 1, wherein, The switching unit includes: A sensing switch that selectively senses characteristics of a sub-pixel of one of the first pixel and the second pixel; and A drive switch is provided, which drives the first reference voltage line and the second reference voltage line respectively.

3. The display panel according to claim 2, wherein, The sensing switch remains in the off state, thereby applying the characteristics of the sub-pixels of the first pixel to the compensation value of the sub-pixels of the second pixel.

4. The display panel according to claim 3, wherein, When the characteristics of the sub-pixels of the first pixel are defect-free, the sensing switch remains in the off state, thereby applying the characteristics of the sub-pixels of the first pixel to the compensation value of the sub-pixels of the second pixel.

5. The display panel according to claim 4, wherein, After applying the characteristics of the sub-pixels of the first pixel to the compensation value of the sub-pixels of the second pixel, the sensing switch is turned on and the driving switch is turned off to sense the characteristics of the sub-pixels of the second pixel.

6. The display panel according to claim 2, wherein, When the characteristics of a sub-pixel of the first pixel are defective, the sensing switch is switched on, thereby transmitting the reference voltage to the first reference voltage line and the second reference voltage line.

7. The display panel according to claim 6, wherein, When the characteristics of a sub-pixel of the first pixel are defective, the sensing switch remains on, thereby applying the characteristics of the sub-pixel of the second pixel to the compensation value of the sub-pixel of the first pixel.

8. The display panel according to claim 7, wherein, When the characteristics of a sub-pixel of the first pixel are defective and the sensing switch switches from off to on, the driving switch switches from on to off.

9. The display panel according to claim 8, wherein, When the drive switch is switched from on to off, the first reference voltage line and the second reference voltage line are driven respectively.

10. The display panel according to claim 9, wherein, When the drive switch switches from on to off, the characteristics of the sub-pixels of the second pixel are applied to the compensation value of the sub-pixels of the first pixel.

11. The display panel according to claim 1, wherein, The switch unit is located on the non-display area of ​​the display panel.

12. The display panel according to claim 2, further comprising: A sensing line that transmits a sensing signal that senses the characteristics of a sub-pixel of the first pixel to the sensing switch; as well as The drive line transmits the drive signals that drive the first reference voltage line and the second reference voltage line to the drive switch, respectively.

13. A display device, the display device comprising: The display panel includes the display panel according to any one of claims 1 to 12; A data driver that provides data voltage to the display panel via multiple data lines; and A gating driver that provides gating signals to the display panel via multiple gating lines.

14. The display device according to claim 13, further comprising a timing controller, the timing controller including a memory and a compensator. in, The data driver includes a power switch, a sampling switch, an analog-to-digital converter (ADC), and a digital-to-analog converter (DAC). The power switch, the sampling switch, the ADC, and the DAC reflect the characteristics of the sub-pixels of the first pixel in the sub-pixels of the second pixel and compensate for the sub-pixels of the second pixel.

15. The display device according to claim 14, wherein, The power switch is operated to apply a reference voltage to each reference voltage line. The sampling switch controls the connection between each reference voltage line and the analog-to-digital converter. The analog-to-digital converter outputs the voltage of each reference voltage line as a sensed value corresponding to a digital value. The compensator identifies the characteristics of each sub-pixel based on the sensed values ​​transmitted from the analog-to-digital converter and calculates a compensation value. The memory stores the calculated compensation value, and The digital-to-analog converter outputs the image data, which is changed based on the compensation value, as an analog data voltage.

16. A driving method for a display device, the display device comprising a display panel having a plurality of pixels, each comprising a plurality of sub-pixels, and a plurality of reference voltage lines, the plurality of reference voltage lines providing a reference voltage to each pixel, the method comprising: A first process involves performing a switching action via a sensing switch to selectively sense the characteristics of a sub-pixel of one of the first and second pixels among the plurality of pixels; as well as The path along which the reference voltage is transmitted to one of the first and second reference voltage lines among the plurality of reference voltage lines is switched by a drive switch to drive the second process of the first and second reference voltage lines respectively.

17. The method according to claim 16, wherein, The first process includes the following steps: when the characteristics of a sub-pixel of the first pixel are defective, the sensing switch is switched on, thereby transmitting the reference voltage to the first reference voltage line and the second reference voltage line.

18. The method according to claim 17, wherein, The second process includes the following steps: While the sensing switch remains on, the characteristics of the sub-pixels of the second pixel are reflected in the compensation value of the sub-pixels of the first pixel. as well as When the sensing switch switches from off to on, the driving switch switches from on to off, and drives the first reference voltage line and the second reference voltage line respectively.

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