Display device and driving method thereof

Abstract

A display device and a driving method thereof are provided, the display device including a scan driver configured to sequentially supply a scan signal having an on level to a first scan line and a second scan line during a first period and concurrently supply the scan signal having the on level to the first scan line and the second scan line during a second period after the first period, wherein: a masking period corresponds to a difference between a start point of the second period in a current frame period and a start point of a first period in a next frame period, a first frame period and a second frame period have different masking periods, a third frame period between the first frame period and the second frame period has a masking period that is the same as a masking period of the first frame period, and a fourth frame period between the first frame period and the second frame period has a masking period that is the same as a masking period of the second frame period.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2020-0023897, filed on February 26, 2020, the entire disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Aspects of some example embodiments of the present disclosure relate to a display apparatus and a driving method thereof. BACKGROUND

[0003] With the development of information technology, display apparatuses providing a medium for connecting information and users have become increasingly important. Accordingly, the use of display apparatuses such as liquid crystal display apparatuses, organic light emitting display apparatuses, plasma display apparatuses, etc. is increasing.

[0004] A display apparatus can display a moving or video image by continuously displaying a plurality of frames. Here, each frame can include an image display period during which an image is displayed and a mask period during which an image is not displayed.

[0005] It can be required to increase or decrease the mask period according to a situation. Due to a hardware / time constraint, it can not be possible to freely determine a change (i.e., an increment or a decrement) of the mask period. Accordingly, there can be a problem in which a change in luminance is perceived by a user based on the change of the mask period.

[0006] The above information disclosed in this Background section is only for enhancing the understanding of the background of the disclosure, therefore, it can not necessarily be construed as the prior art that is already known to those skilled in the art. SUMMARY

[0007] Aspects of some example embodiments of the present disclosure relate to a display apparatus configured to subdivide a change in a mask period, and a driving method thereof, thereby preventing or reducing a situation in which a change in luminance perceptible by a user even when the mask period is changed.

[0008] Aspects of some example embodiments of this disclosure include a display apparatus including: a first pixel coupled to a first scan line and a data line; a second pixel coupled to a second scan line and the data line; and a scan driver configured to sequentially supply a scan signal having an on level to the first scan line and the second scan line during a first period, and to simultaneously or concurrently supply the scan signal having the on level to the first scan line and the second scan line during a second period after the first period. A masking period can correspond to a difference between a start point of the second period in a current frame period and a start point of a first period in a next frame period, the first frame period and the second frame period can have different masking periods, a third frame period between the first frame period and the second frame period can have a same masking period as a masking period of the first frame period, a fourth frame period between the first frame period and the second frame period can have a same masking period as a masking period of the second frame period.

[0009] According to some example embodiments, each frame period can include an image display period and a masking period, the image display period can correspond to a difference between a start point of a first period and a start point of a second period in one frame period.

[0010] According to some example embodiments, the display apparatus can further include a data driver configured to apply a data voltage corresponding to a masking gray level to the data line during the second period.

[0011] According to some example embodiments, the display apparatus can further include a scan start signal generator configured to supply a first scan start pulse and a second scan start pulse to the scan driver, the first scan start pulse corresponding to a start point of the first period, the second scan start pulse corresponding to a start point of the second period.

[0012] According to some example embodiments, a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the first frame period can be different from a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the second frame period, a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in a third frame period can be the same as a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the first frame period, a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in a fourth frame period can be the same as a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the second frame period.

[0013] According to some example embodiments, the display apparatus can further include a third pixel coupled to a third scan line and a data line, and a fourth pixel coupled to a fourth scan line and the data line. The scan driver can supply a scan signal having an on level to the third scan line during a third period, and supply a scan signal having an on level to the fourth scan line during a fourth period, the first period, the third period, the second period, and the fourth period can sequentially be located in one frame period.

[0014] According to some example embodiments, the first period can be longer than each of the second period, the third period, and the fourth period.

[0015] According to some example embodiments, the second period, the third period, and the fourth period can have the same length.

[0016] According to some example embodiments, a number of scan signals having an on level and output from the scan driver during the second period in the first frame period can be the same as a number of scan signals having an on level and output from the scan driver during the second period in the second frame period.

[0017] Aspects according to some example embodiments of the present disclosure can include a method of driving a display apparatus including a scan driver, a first pixel coupled to a first scan line and a data line, and a second pixel coupled to a second scan line and the data line. The method can include sequentially supplying, by the scan driver, a scan signal having an on level to the first scan line and the second scan line during a first period in each frame period, and simultaneously or concurrently supplying, by the scan driver, a scan signal having an on level to the first scan line and the second scan line during a second period in each frame period. A masking period can correspond to a difference between a start point of the second period in a current frame period and a start point of the first period in a next frame period, the first frame period and the second frame period can have different masking periods, a third frame period between the first frame period and the second frame period can have the same masking period as the masking period of the first frame period, and a fourth frame period between the first frame period and the second frame period can have the same masking period as the masking period of the second frame period.

[0018] According to some example embodiments, the method can further include applying a data voltage corresponding to a masking gray level to the data line during the second period.

[0019] According to some example embodiments, the method can further include supplying a first scan start pulse and a second scan start pulse to the scan driver, the first scan start pulse corresponding to a start point of the first period, and the second scan start pulse corresponding to a start point of the second period.

[0020] According to some example embodiments, a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the first frame period can be different from a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the second frame period, a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the third frame period can be the same as the spacing between the time at which the first scan start pulse is generated and the time at which the second scan start pulse is generated in the first frame period, and a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the fourth frame period can be the same as the spacing between the time at which the first scan start pulse is generated and the time at which the second scan start pulse is generated in the second frame period.

[0021] According to some example embodiments, the display apparatus can further include a third pixel coupled to a third scan line and a data line, and a fourth pixel coupled to a fourth scan line and the data line. The scan driver can supply a scan signal having an on level to the third scan line during a third period, and supply a scan signal having an on level to the fourth scan line during a fourth period, the first period, the third period, the second period, and the fourth period can be sequentially located in one frame period.

[0022] According to some example embodiments, the first period can be longer than each of the second period, the third period, and the fourth period.

[0023] According to some example embodiments, the second period, the third period, and the fourth period can have the same length.

[0024] According to some example embodiments, a number of scan signals having an on level and output from the scan driver during the second period in the first frame period can be the same as a number of scan signals having an on level and output from the scan driver during the second period in the second frame period.

[0025] Aspects of some example embodiments of this disclosure can include a display apparatus including: a first pixel coupled to a first scan line and a data line; a second pixel coupled to a second scan line and the data line; a scan driver configured to sequentially supply a scan signal having an on level to the first scan line and the second scan line in response to a first scan start pulse, and to simultaneously or concurrently supply the scan signal having the on level to the first scan line and the second scan line in response to a second scan start pulse after the first scan start pulse; a masking duty controller configured to determine a second masking period of at least two consecutive frame periods based on a single first masking period; and a scan start signal generator configured to supply the first scan start pulse and the second scan start pulse in each frame period, and to determine a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated based on the second masking period corresponding to each frame period.

[0026] According to some example embodiments, the first frame period and the second frame period can have different masking periods, a third frame period between the first frame period and the second frame period can have a masking period that is the same as the masking period of the first frame period, a fourth frame period between the first frame period and the second frame period can have a masking period that is the same as the masking period of the second frame period, a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the first frame period can be different from a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the second frame period, a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the third frame period can be the same as the spacing between the time at which the first scan start pulse is generated and the time at which the second scan start pulse is generated in the first frame period, and a spacing between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the fourth frame period can be the same as the spacing between the time at which the first scan start pulse is generated and the time at which the second scan start pulse is generated in the second frame period.

[0027] Aspects of some exemplary embodiments of this disclosure may include a display device comprising a plurality of pixels coupled to the same scan line. The plurality of pixels may display a monochrome image during a first masking period of q horizontal time segments and a moving or video image during a first image display period of r horizontal time segments, each of the consecutive first frame time segments being configured to have q+r horizontal time segments, where each of q and r is a positive integer; the plurality of pixels may also display a monochrome image during a second masking period of q+1u horizontal time segments and a moving or video image during a second image display period of s horizontal time segments, each of the consecutive second frame time segments being configured to have q+1u+s horizontal time segments, where each of u and s is a positive integer; the q+r horizontal time segments may be combined with q+1u+... The s horizontal time periods are identical; in at least one third frame time period, the plurality of pixels may display a monochrome image during a third masking period of q horizontal time periods and display a motion or video image during a third image display period of r horizontal time periods; in at least one fourth frame time period, the plurality of pixels may display a monochrome image during a fourth masking period of q+1u horizontal time periods and display a motion or video image during a fourth image display period of s horizontal time periods; the at least one third frame time period and the at least one fourth frame time period may be located between the end point of the consecutive first frame time period and the start point of the consecutive second frame time period, and the at least one third frame time period and the at least one fourth frame time period may alternate with each other at regular intervals. Attached Figure Description

[0028] Figure 1 This is a diagram illustrating a display device according to some example embodiments of the present disclosure.

[0029] Figure 2 This is a diagram illustrating pixels according to some example embodiments of the present disclosure.

[0030] Figure 3 It shows the driver Figure 2 The diagram shows the method for calculating pixels.

[0031] Figure 4 This is a diagram illustrating a scan driver according to some example embodiments of the present disclosure.

[0032] Figure 5 and Figure 6 This is a diagram illustrating image display periods and masking periods according to some example embodiments of the present disclosure.

[0033] Figure 7 It is a graph showing the difference in brightness perceived by a person in response to the same image, depending on the display mode.

[0034] Figure 8 This is a graph showing the change in brightness when the masking period is changed.

[0035] Figure 9 and Figure 10 This is a diagram illustrating the operation of a masking duty cycle controller and a scan start signal generator according to some example embodiments of the present disclosure.

[0036] Figure 11 and Figure 12 This is a diagram illustrating a method of driving a display device according to some example embodiments of the present disclosure.

[0037] Figure 13 and Figure 14 This is a diagram illustrating further operation of the masking duty cycle controller and scan start signal generator according to some example embodiments of the present disclosure.

[0038] Figure 15 This is a graph showing the changes in actual brightness and perceived brightness when the masking period is changed in an existing system.

[0039] Figure 16 This is a graph illustrating the changes in actual brightness and perceived brightness when the masking period is changed according to some example embodiments of the present disclosure.

[0040] Figure 17 This is a diagram illustrating a display device according to some example embodiments of the present disclosure. Detailed Implementation

[0041] In the following description, aspects of some exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings, enabling those skilled in the art to implement embodiments based on the present disclosure. Aspects of the embodiments according to the present disclosure can be implemented in various different forms, and are not limited to the exemplary embodiments described below. Aspects of the embodiments according to the present disclosure can be used in combination with each other, or can be used individually.

[0042] Furthermore, in the accompanying drawings, parts unrelated to this disclosure will be omitted to provide a clearer explanation of the disclosure. Reference should be made to the accompanying drawings, in which similar reference numerals are used in different drawings to denote similar components. Therefore, reference numerals described in the preceding drawings may be used in other drawings.

[0043] Because the size and thickness of various components are arbitrarily indicated in the accompanying drawings for ease of description, this disclosure is not limited to the drawings. The size, thickness, etc., of the components in the drawings may be exaggerated to clarify the description of multiple layers and regions.

[0044] Figure 1 This is a diagram illustrating a display device according to some example embodiments of the present disclosure.

[0045] The display device 10 according to some example embodiments of the present disclosure may include a timing controller 11, a data driver 12, a scan driver 13, a pixel assembly 14, a sensor 15, a mask duty cycle controller 16, and a scan start signal generator 17.

[0046] The timing controller 11 can receive grayscale values ​​and control signals for each image frame from an external processor. The control signals may include a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, etc. The vertical synchronization signal may include multiple pulses, each pulse being generated at a time that indicates the end of the previous frame period and the beginning of the current frame period. The spacing between adjacent pulses of the vertical synchronization signal may correspond to a frame period. The horizontal synchronization signal may include multiple pulses, each pulse being generated at a time that indicates the end of the previous horizontal period and the beginning of a new horizontal period. The spacing between adjacent pulses of the horizontal synchronization signal may correspond to a horizontal period. According to some example embodiments, a horizontal period may correspond to the minimum spacing between the starting points of scan signals with an on level. The data enable signal may have an enable level for a specific horizontal period and may have a disable level in periods other than the specific horizontal period. When the data enable signal has an enable level, this indicates that grayscale values ​​are supplied in the corresponding horizontal period. Grayscale values ​​can be supplied in pixel rows in each corresponding horizontal period.

[0047] The timing controller 11 can perform rendering of grayscale values ​​to correspond to the specifications of the display device 10. For example, an external processor can supply red, green, and blue grayscale values ​​for each unit point. However, for example, when the pixel assembly 14 has a pentile structure, because adjacent unit points share a pixel, each grayscale value may not be able to correspond to a pixel in a one-to-one manner. In this case, rendering of the grayscale values ​​is required. When each grayscale value corresponds to a pixel in a one-to-one manner, rendering of the grayscale values ​​is not required. Grayscale values ​​for which rendering has been performed or not can be supplied to the data driver 12. In addition, in order to display frames, the timing controller 11 can supply control signals suitable for their specifications to the data driver 12, scan driver 13, sensor 15, etc. In addition, the timing controller 11 can supply first masking duty cycle information BDY1.

[0048] The data driver 12 can use grayscale values ​​and control signals to generate data voltages to be supplied to data lines D1, D2, D3...Dm. For example, the data driver 12 can use a clock signal to sample grayscale values ​​and apply data voltages corresponding to the grayscale values ​​to data lines D1 to Dm on a pixel-by-pixel basis. Here, m can be an integer greater than 0.

[0049] The scan driver 13 can receive a clock signal from the timing controller 11 and output an enable signal. It can also generate scan signals to be supplied to scan lines S11, S21, S12, S22…S1n and S2n by receiving a scan start signal from the scan start signal generator 17. Here, n can be an integer greater than 0. In the first mode, the scan start signal can include at least two scan start pulses STP1 and STP2 within a frame period. In the second mode, the scan start signal can include only one scan start pulse STP1 within a frame period. (See below for further details.) Figure 4 A more detailed description of the example configuration and operation of scan drive 13 is provided.

[0050] Sensor 15 can supply initialization voltage to sensing lines I1, I2, I3...Ip by receiving control signals from timing controller 11, or it can receive sensing signals. For example, sensor 15 can supply initialization voltage to sensing lines I1, I2, I3...Ip for at least a portion of the display period. For example, sensor 15 can receive sensing signals through sensing lines I1, I2, I3...Ip for at least a portion of the sensing period. Sensor 15, timing controller 11, data driver 12, or any other controller can use the received sensing signals to calculate the characteristics of each pixel PXij. The characteristics of each pixel PXij can be the threshold voltage of the driving transistor, mobility, or the degree of degradation of the light-emitting diode. Here, p can be an integer greater than 0. Here, i can be a positive integer not greater than n, and j can be a positive integer not greater than n.

[0051] Pixel component 14 comprises multiple pixels. Each pixel PXij can be coupled to its corresponding data line, scan line, and sensor line. (See below for further details.) Figure 2 and Figure 3 A more detailed description of example configurations and operations for the pixel PXij.

[0052] The masking duty cycle controller 16 can receive first masking duty cycle information BDY1 and supply second masking duty cycle information BDY2 based on the first masking duty cycle information BDY1. The first masking duty cycle information BDY1 may include information about a first masking period, and the second masking duty cycle information BDY2 may include information about a second masking period. The masking duty cycle controller 16 can determine a second masking period of at least two consecutive frame periods based on a single first masking period.

[0053] The scan start signal generator 17 can receive the second masking duty cycle information BDY2, and supply a scan start signal including a first scan start pulse STP1 and a second scan start pulse STP2 based on the second masking duty cycle information BDY2. The second scan start pulse STP2 can be generated in the same frame time period as its corresponding first scan start pulse STP1.

[0054] The scan start signal generator 17 can supply a first scan start pulse STP1 and a second scan start pulse STP2 in each frame period, and can determine the interval between the time of generating the first scan start pulse STP1 and the time of generating the second scan start pulse STP2 based on the second masking period corresponding to each frame period.

[0055] Reference Figure 9 and Figure 10 The masking duty cycle controller 16 and the scan start signal generator 17 are described in more detail.

[0056] Figure 2 This is a diagram illustrating pixels according to some example embodiments of the present disclosure.

[0057] Reference Figure 2 According to some example embodiments of this disclosure, a pixel PXij may include transistors T1, T2 and T3, a storage capacitor Cst and a light-emitting diode LD.

[0058] Transistors T1, T2, and T3 can be configured as N-type transistors. According to some example embodiments, transistors T1, T2, and T3 can be configured as P-type transistors. According to some example embodiments, transistors T1, T2, and T3 can be configured as a combination of N-type and P-type transistors. A P-type transistor generally refers to a transistor configured such that the amount of applied current increases as the difference between the voltage at the gate electrode and the voltage at the source electrode increases in the negative direction. An N-type transistor generally refers to a transistor configured such that the amount of applied current increases as the difference between the voltage at the gate electrode and the voltage at the source electrode increases in the positive direction. The transistors can be configured in any of various forms such as thin-film transistors (TFTs), field-effect transistors (FETs), bipolar junction transistors (BJTs), etc.

[0059] The first transistor T1 can be configured such that its gate electrode is connected to a first node N1, its first electrode is connected to a first power supply ELVDD, and its second electrode is connected to a second node N2. The first transistor T1 can be referred to as a driving transistor.

[0060] The second transistor T2 can be configured such that its gate electrode is connected to the data scan line S1i, its first electrode is connected to the data line Dj, and its second electrode is connected to the first node N1. The second transistor T2 can be referred to as the scan transistor.

[0061] The third transistor T3 can be configured such that its gate electrode is coupled to the sensing scan line S2i, its first electrode is coupled to the second node N2, and its second electrode is coupled to the sensing line Ik. The third transistor T3 can be referred to as the sensing transistor.

[0062] The storage capacitor Cst can be configured such that its first electrode is coupled to a first node N1 and its second electrode is coupled to a second node N2.

[0063] A light-emitting diode (LD) can be configured such that its anode is connected to a second node N2 and its cathode is connected to a second power supply ELVSS. The LD can be configured as any of various forms, such as an organic light-emitting diode, an inorganic light-emitting diode, a quantum dot diode, a quantum well diode, etc. Furthermore, although the LD... Figure 2 The light-emitting diode (LED) is shown as a single LED, but embodiments of this disclosure are not limited thereto, and according to some example embodiments, the LED can be configured as a plurality of LEDs connected in parallel, in series, or in a series-parallel configuration.

[0064] Typically, the voltage of the first power supply ELVDD can be higher than the voltage of the second power supply ELVSS. However, in special cases where the light-emitting diode (LD) is prevented from emitting light (e.g., during a portion of the sensing period), the voltage of the second power supply ELVSS can be set to be higher than the voltage of the first power supply ELVDD.

[0065] Figure 3 It shows the driver Figure 2 The diagram shows the method for calculating pixels.

[0066] During the display period, the sensing line Ik can be connected to the initialization power supply VINT.

[0067] During the display period, data voltages DV(i-1), DVi, and DV(i+1) can be sequentially applied to data line Dj in horizontal time intervals. A scan signal with a conduction level (high level) can be applied to data scan line S1i in the corresponding horizontal time interval. Furthermore, a scan signal with a conduction level can also be applied to sensing scan line S2i in synchronization with data scan line S1i. According to some example embodiments, during the display period, sensing scan line S2i can be in a state in which a scan signal with a conduction level is always applied to sensing scan line S2i.

[0068] For example, when a scan signal with an on-level is applied to the data scan line S1i and the sensing scan line S2i, the second transistor T2 and the third transistor T3 can be turned on. Therefore, the voltage corresponding to the difference between the data voltage DVi and the initialization power supply VINT can be written to the storage capacitor Cst of pixel PXij.

[0069] In pixel PXij, the amount of drive current flowing in the drive path that combines the first power supply ELVDD, the first transistor T1, and the second power supply ELVSS is determined based on the difference between the voltage of the gate electrode of the first transistor T1 and the voltage of the source electrode of the first transistor T1. The luminous intensity of the light-emitting diode (LD) can be determined based on the amount of drive current.

[0070] Then, when a scan signal with a cutoff level (low level) is applied to the data scan line S1i and the sensing scan line S2i, the second transistor T2 and the third transistor T3 can be turned off. Therefore, regardless of the change in the voltage of the data line Dj, the difference between the voltage of the gate electrode of the first transistor T1 and the voltage of the source electrode of the first transistor T1 is maintained by the storage capacitor Cst, and the luminous brightness of the light-emitting diode LD can be maintained.

[0071] Figure 4 This is a diagram illustrating a scan driver according to some example embodiments of the present disclosure.

[0072] Reference Figure 4 According to some example embodiments of this disclosure, the scan driver 13 may include a plurality of scan levels ST1, ST2 and ST3.

[0073] Each of scan levels ST1, ST2, and ST3 can be coupled to at least some clock lines CKS. The first scan level ST1 can be coupled to the scan start line STVL and the first carry line CR1. Each of the other scan levels ST2 and ST3 can be coupled to a carry line coupled to the previous scan level and a carry line coupled to the next scan level. For example, the second scan level ST2 can be coupled to the first carry line CR1 and the second carry line CR2. The third scan level ST3 can be coupled to the second carry line CR2 and the third carry line CR3.

[0074] Scan stages ST1, ST2, and ST3 can be combined in the form of shift registers to sequentially transmit carry signals. When the first scan stage ST1 receives the first scan start pulse STP1, the first output node ON1 is charged under the control of the clock signal, and the first carry signal can be output to the first carry line CR1. When the second scan stage ST2 receives the first carry signal, the second output node ON2 is charged under the control of the clock signal, and the second carry signal can be output to the second carry line CR2. When the third scan stage ST3 receives the second carry signal, the third output node ON3 is charged under the control of the clock signal, and the third carry signal can be output to the third carry line CR3.

[0075] Each scan level can be coupled to at least two buffers. For example, each buffer can be configured as a complementary metal-oxide-semiconductor (CMOS) transistor, or as two transistors connected in series. When each buffer receives an output enable signal while its output node is charged, each buffer can output a scan signal with an on level to its corresponding scan line. The voltage level of the output node in the charging state and the voltage level of the output enable signal can be configured in various ways depending on the buffer configuration.

[0076] For example, when buffer BF11 receives the output enable signal OE11 while its first output node ON1 is charging, buffer BF11 can output a scan signal with an on level to the first data scan line S11. For example, even if the first output node ON1 is charging, buffer BF11 can output a scan signal with a off level to the first data scan line S11 even if it does not receive the output enable signal OE11. Similarly, when buffer BF21 receives the output enable signal OE21 while its first output node ON1 is charging, buffer BF21 can output a scan signal with an on level to the first sensing scan line S21. For example, even if the first output node ON1 is charging, buffer BF21 can output a scan signal with a off level to the first sensing scan line S21 even if it does not receive the output enable signal OE21.

[0077] The above description can be applied in the same way to buffers BF12, BF22, BF13 and BF23 and output enable signals OE12, OE22, OE13 and OE23, therefore, repeated descriptions will be omitted.

[0078] In the following text, for ease of description, data scan lines will be described as scan lines corresponding to the scan level. This is because the timing of the scan signal with an on-state applied to the sensing scan line during the display period can be synchronized with the timing of the scan signal with an on-state applied to the data scan line (e.g., ...). Figure 3 (as shown in the image), so unless it is a special case, it will not be described.

[0079] Figure 5 and Figure 6 This is a diagram illustrating image display periods and masking periods according to some example embodiments of the present disclosure.

[0080] In the following text, the frame period, image display period, and masking period will be described based on the first scan line S11.

[0081] Reference Figure 5 The diagram illustrates three consecutive frame periods, FPN, FP(N+1), and FP(N+2). Each frame period can include a front porch period, an active period, and a back porch period. The front porch period is the time between the start of the frame period and the start of the active period. The active period is the time during which the grayscale values ​​corresponding to the frame are supplied. The back porch period is the time between the end of the active period and the end of the frame period. The blank period BP can be a period that includes consecutive front and back porch periods. In the blank period BP, no grayscale values ​​for pixels are supplied.

[0082] For example, the Nth frame time period FPN may include the leading edge period, the active period period APN, and the trailing edge period period BPPN. The (N+1)th frame time period FP (N+1) may include the leading edge period period FPP (N+1), the active period period AP (N+1), and the trailing edge period period BPP (N+1). The (N+2)th frame time period FP (N+2) may include the leading edge period period FPP (N+2), the active period AP (N+2), and the trailing edge period.

[0083] The leading edge period can begin at the moment the pulse generating the vertical synchronization signal Vsync is generated. The length of the leading edge period can correspond to an integer multiple of one horizontal period 1H. Each of the active period and the trailing edge period can also correspond to an integer multiple of one horizontal period 1H. One horizontal period 1H can correspond to the minimum interval between the starting points of sequentially supplied scan signals with on-level signals.

[0084] In each of the frame time intervals FPN, FP(N+1), and FP(N+2), the first scan start pulse STP1 and the second scan start pulse STP2 can be sequentially applied to the scan start line STVL (in the case of the first mode).

[0085] In the following text, reference will be made to Figure 5 and Figure 6 A more detailed description is provided of the image display period ODN and masking period BDN based on the Nth frame period FPN.

[0086] When the activity period begins, a first scan start pulse STP1 can be applied to the scan start line STVL. Here, the scan driver 13 can sequentially supply scan signals with an on level to the scan lines S11, S12, S13, S14, and S15 of the scan stage unit. For example, the scan driver 13 can sequentially supply scan signals with an on level to the first scan line S11 and the second scan line S12 during the first time period P1. For example, the scan driver 13 can supply scan signals with an on level to the (i-1)th scan line S1(i-1) during the third time period P3. Here, the data driver 12 can sequentially apply data voltages DV1, DV2, DV3, DV4, DV5, DV6...DV(i-2) and DV(i-1) corresponding to the grayscale values ​​of the frame to the data line Dj.

[0087] When the second scan start pulse STP2 is applied to the scan start line STVL, the scan driver 13 can simultaneously or concurrently supply scan signals with an on level to a masked scan group BSG comprising two or more scan lines (e.g., scan lines S11, S12, S13, and S14). For example, the scan driver 13 can simultaneously or concurrently supply scan signals with an on level to the first scan line S11 and the second scan line S12 during a second time period P2 following the first time period P1. Here, the data driver 12 can supply a data voltage BV corresponding to the masked grayscale to the data line Dj. For example, the data driver 12 can apply the data voltage BV corresponding to the masked grayscale to the data line Dj. For example, the masked grayscale can be black grayscale (0 grayscale). For example, the masked grayscale can be a low grayscale (e.g., a set or predetermined low grayscale).

[0088] The scan signal with a conduction level and output in response to the second scan start pulse STP2 can be time-independent from the scan signal with a conduction level and output in response to the first scan start pulse STP1. That is, when the scan signal with a conduction level is supplied simultaneously or concurrently to the mask scan group BSG in response to the second scan start pulse STP2, the scan signal with a conduction level may not be supplied to the i-th scan line S1i. In other words, the scan signal with a conduction level is sequentially supplied to scan lines S11 to S1(i-1) at intervals of one horizontal time period 1H in response to the first scan start pulse STP1, and the scan signal with a conduction level can be supplied to the i-th scan line S1i at least two horizontal time periods 2H after the scan signal with a conduction level is supplied to the (i-1)-th scan line S1(i-1). Then, before the on-level scan signals are supplied simultaneously or concurrently to the next masked scan group (e.g., the fifth to eighth scan lines), the on-level scan signals can be sequentially supplied to scan lines S1(i+1) and S1(i+2) at intervals of one horizontal time period 1H. For example, the scan driver 13 can supply the on-level scan signal to the i-th scan line S1i during the fourth time period P4.

[0089] In a frame-time period (FPN), the first period (P1), the third period (P3), the second period (P2), and the fourth period (P4) can be positioned sequentially. The first period (P1) can be longer than each of the second, third, and fourth periods (P3 and P4). The second, third, and fourth periods (P2, P3, and P4) can have the same length.

[0090] The interval between the time when the first scan start pulse STP1 is generated and the time when the second scan start pulse STP2 is generated can be defined as the image display period of the corresponding frame period. Optionally, according to some example embodiments, for the same scan line, the interval between the time when a scan signal with a conduction level and corresponding to the first scan start pulse STP1 is generated and the time when a scan signal with a conduction level and corresponding to the second scan start pulse STP2 is generated can be defined as the image display period of the corresponding frame period.

[0091] Optionally, according to some example embodiments, the interval between the time when the pulse of the horizontal synchronization signal Hsync corresponding to the first scan start pulse STP1 is generated and the time when the pulse of the horizontal synchronization signal Hsync corresponding to the second scan start pulse STP2 is generated can be defined as the image display period of the corresponding frame period. For example, the image display period ODN can correspond to the difference between the start point of the first period P1 and the start point of the second period P2 in the frame period FPN. Various defined image display periods have the same duration, and those skilled in the art can define the image display period in different ways. Figure 5 As shown, frame time period FPN, frame time period FP(N+1) and frame time period FP(N+2) can include the corresponding image display time period ODN, image display time period OD(N+1) and image display time period OD(N+2).

[0092] The interval between the time when the second scan start pulse STP2 is generated and the time when the first scan start pulse STP1 is generated for the next frame period can be defined as the masking period for the corresponding frame period. Optionally, according to some example embodiments, for the same scan line, the interval between the time when a scan signal with a conduction level and corresponding to the second scan start pulse STP2 is generated and the time when a scan signal with a conduction level and corresponding to the first scan start pulse STP1 for the next frame period is generated can be defined as the masking period for the corresponding frame period.

[0093] Optionally, according to some example embodiments, the interval between the time when the pulse of the horizontal synchronization signal Hsync corresponding to the second scan start pulse STP2 is generated and the time when the pulse of the horizontal synchronization signal Hsync corresponding to the first scan start pulse STP1 of the next frame period is generated can be defined as the masking period of the corresponding frame period. For example, the masking period BDN can correspond to the difference between the start point of the second period P2 and the start point of the first period of the next frame period FP(N+1). Various defined masking periods have the same duration, and those skilled in the art can define the masking period in different ways. Figure 5 As shown, frame time period FPN, frame time period FP(N+1), and frame time period FP(N+2) can include corresponding masking time period BDN, masking time period BD(N+1), and masking time period BD(N+2) (for example, see...). Figure 8 ).

[0094] The number of scan lines included in the masked scan group BSG (e.g., Figure 6The four scan lines in the example can be a fixed number that is not easily changed due to hardware / time constraints. That is, when the number of scan lines included in the masked scan group BSG is forcibly changed, it will cause problems such as insufficient time to charge the pixel PXij with the data voltage, insufficient sensing time for the sensor 15, and unreliable clock phase difference, which will cause display quality problems of the display device 10.

[0095] For example, the number of scan signals with an on level and output from scan driver 13 during the second time period P2 of the first frame period can be the same as the number of scan signals with an on level and output from scan driver 13 during the second time period P2 of the second frame period. The second frame period and the first frame period can be consecutive frames. When a third frame period or a fourth frame period exists between the second frame period and the first frame period, the number of scan signals with an on level and output from scan driver 13 during the second time period P2 of the third or fourth frame period can be the same as the number of scan signals with an on level and output from scan driver 13 during the second time period P2 of the first or second frame period.

[0096] Furthermore, the interval between the timing of simultaneously or concurrently supplying scan signals with conduction levels to the current masked scan group BSG and the timing of simultaneously or concurrently supplying scan signals with conduction levels to the next masked scan group BSG is not easily altered. For example, when the masked scan group BSG comprises four scan lines, and when the data voltage BV corresponding to the masked grayscale is written to pixel PXij during a horizontal time period 1H, such as Figure 6 As shown, it is desired that the masked scan group (BSG) has a spacing of 5 horizontal time intervals. Here, for all masked scan groups (BSG), the same image display time interval and the same masking time interval can be maintained.

[0097] Figure 7 It is a graph showing the difference in brightness perceived by a person in response to the same image, depending on the display mode.

[0098] The first mode MODE1 is a drive mode in which each frame time period includes an image display time period and a masking time period. As described above, in the first mode MODE1, the scan driver 13 can supply a first scan start pulse STP1 and a second scan start pulse STP2 in each frame.

[0099] The second mode, MODE2, is a drive mode in which each frame time period includes only the image display time period. Here, the scan driver 13 can supply only the first scan start pulse STP1 in each frame.

[0100] In the graphs of the first mode (MODE1) and the second mode (MODE2), the horizontal axis represents time and the vertical axis represents brightness.

[0101] For example, suppose any pixel PXij emits light with gray level A in frame N (FPN), emits light with gray level B (lower than A) in frame N+1 (FP(N+1)), and emits light with gray level C (lower than B) in frame N+2 (FP(N+2)). In this case, as... Figure 7 As shown, the speed at which a person perceives a change in grayscale in the first mode MODE1 can be higher than the speed at which a person perceives a change in grayscale in the second mode MODE2.

[0102] In other words, when the display device 10 displays a moving or video image in the second mode MODE2, a person will recognize the image after the actual moment the image is displayed. This is called Motion Picture Response Time (MPRT), or "dynamic picture response time". To improve MPRT, it is desirable to drive the display device in the first mode MODE1.

[0103] Figure 8 This is a graph showing the change in brightness when the masking period is changed.

[0104] Reference Figure 8 The diagram illustrates a scenario where the Nth frame period to the N+2th frame period includes a masking period BDN, a masking period BD(N+1), and a masking period BD(N+2), each of which has q horizontal time intervals. Similarly, the N+3th frame period to the N+5th frame period includes a masking period BD(N+3), a masking period BD(N+4), and a masking period BD(N+5), each of which has q+1u horizontal time intervals. In other words, the length of the masking period increases starting from the N+3th frame period. For example, this could be a scenario where the display device 10 displays a still or static image and then displays a moving or video image. Furthermore, for example, this could be a scenario where the display device 10 displays a moving or video image with a small amount of variation and then displays a moving or video image with a large amount of variation. Here, q and u are integers, and each of q and u is greater than 0.

[0105] When the interval between the time of generating the first scan start pulse STP1 and the time of generating the second scan start pulse STP2 increases or decreases, the scan start signal generator 17 can increase or decrease this interval by an integer multiple of a unit (e.g., a set or predetermined unit) u. When the masked scan group BSG has such Figure 6 When the interval of the five horizontal time segments shown is given, the unit u can be an integer multiple of the five horizontal time segments. As mentioned above, this is due to the hardware or time constraints of the display device 10.

[0106] like Figure 8 As shown, when the masking period is increased by an integer multiple of unit u, there is a problem where users will perceive an unnecessary change in brightness due to the change in masking period.

[0107] Figure 9 and Figure 10 This is a diagram illustrating the operation of a masking duty cycle controller and a scan start signal generator according to some example embodiments of the present disclosure.

[0108] The masking duty cycle controller 16 can receive first masking duty cycle information BDY1 and supply second masking duty cycle information BDY2 based on the first masking duty cycle information BDY1. The first masking duty cycle information BDY1 may include information about a first masking period, and the second masking duty cycle information BDY2 may include information about a second masking period. The masking duty cycle controller 16 can determine a second masking period of at least two consecutive frame periods based on a single first masking period.

[0109] For example, when the first masking period included in the first masking duty cycle information BDY1 is q+(1 / 2)u horizontal time periods for the Nth frame time period FPN and the N+1th frame time period FP(N+1), the masking duty cycle controller 16 can determine the masking period BDN of the Nth frame time period FPN as q horizontal time periods and the masking period BD(N+1) of the N+1th frame time period FP(N+1) as q+1u horizontal time periods. That is, because the scan start signal generator 17 may not be able to generate the second scan start pulse STP2 with a spacing of q+(1 / 2)u horizontal time periods, the masking duty cycle controller 16 can supply a second masking period that enables the scan start signal generator 17 to operate.

[0110] In addition, with Figure 9 and Figure 10Unlike the previous example, the masking duty cycle controller 16 can determine the masking period BDN of the Nth frame time period FPN as q+1u horizontal time periods, and determine the masking period BD(N+1) of the N+1th frame time period FP(N+1) as q horizontal time periods. That is, the masking duty cycle controller 16 can determine the second masking period such that the average value of the second masking period is the same as the average value of the first masking period.

[0111] The scan start signal generator 17 can receive the second masking duty cycle information BDY2, and supply a scan start signal including a first scan start pulse STP1 and a second scan start pulse STP2 based on the second masking duty cycle information BDY2. The second scan start pulse STP2 can be generated in the same frame time period as its corresponding first scan start pulse STP1.

[0112] The scan start signal generator 17 can supply a first scan start pulse STP1 and a second scan start pulse STP2 in each frame period, and can determine the interval between the time of generating the first scan start pulse STP1 and the time of generating the second scan start pulse STP2 based on the second masking period corresponding to each frame period.

[0113] For example, the scan start signal generator 17 can generate a second scan start pulse STP2 q horizontal time intervals before the time when the first scan start pulse STP1 of the N+1 frame time interval FP(N+1) is generated. Therefore, a masking time interval BDN with a length of q horizontal time intervals can be implemented in the Nth frame time interval FPN.

[0114] Furthermore, the scan start signal generator 17 can generate a second scan start pulse STP2 q+1u horizontal time intervals before the moment when the first scan start pulse STP1 of the N+2 frame time interval FP(N+2) is generated. Therefore, a masking period BD(N+1) with a length of q+1u horizontal time intervals can be implemented in the N+1 frame time interval FP(N+1).

[0115] According to some example embodiments, a user of display device 10 can perceive a masking period of q+(1 / 2)u horizontal time periods in each of the Nth frame time period FPN and the N+1th frame time period FP(N+1). That is, according to some example embodiments, a time-division driving method can be used to implement a virtual masking period of q+(1 / 2)u horizontal time periods. In other words, a virtual masking period that is slightly increased by a fractional multiple of u based on the previous masking period is displayed, thereby preventing or reducing the perception of unnecessary or undesirable brightness changes by the user.

[0116] Figure 11 and Figure 12This is a diagram illustrating a method of driving a display device according to some example embodiments of the present disclosure.

[0117] Reference Figure 11 The diagram shows the first frame segment FRAME1, the third frame segment FRAME3, the fourth frame segment FRAME4, and the second frame segment FRAME2. The first frame segment FRAME1 has q horizontal masking segments, the third frame segment FRAME3 has q horizontal masking segments, the fourth frame segment FRAME4 has q+1u horizontal masking segments, and the second frame segment FRAME2 has q+1u horizontal masking segments.

[0118] Here, the first frame segment FRAME1 can have r horizontal image display segments. That is, the first frame segment FRAME1 can be configured to have q+r horizontal segments. Here, q and r can be integers, each of q and r being greater than 0. Similarly, the third frame segment FRAME3 can have r horizontal image display segments. That is, the third frame segment FRAME3 can be configured to have q+r horizontal segments.

[0119] Here, the second frame segment FRAME2 can have s horizontal image display segments. That is, the second frame segment FRAME2 can be configured to have q+1u+s horizontal segments. Here, u and s can be integers, each of u and s being greater than 0. Similarly, the fourth frame segment FRAME4 can have s horizontal image display segments. That is, the fourth frame segment FRAME4 can be configured to have q+1u+s horizontal segments. Here, q+r horizontal segments can be the same as q+1u+s horizontal segments. In other words, the first frame segment FRAME1 to the fourth frame segment FRAME4 can have the same length.

[0120] During the image display periods from the first frame segment FRAME1 to the fourth frame segment FRAME4, pixels can display moving or video images. During the masking periods from the first frame segment FRAME1 to the fourth frame segment FRAME4, pixels can display monochrome images (e.g., black and white images or low grayscale monochrome images). Here, the description is based on pixels associated with the same scan line. The first frame segment FRAME1 and the second frame segment FRAME2 can have different masking periods. The third frame segment FRAME3, between the first frame segment FRAME1 and the second frame segment FRAME2, can have the same masking period as the first frame segment FRAME1. The fourth frame segment FRAME4, between the first frame segment FRAME1 and the second frame segment FRAME2, can have the same masking period as the second frame segment FRAME2.

[0121] According to some example embodiments, two or more first frame segments FRAME1 can be arranged consecutively, and two or more second frame segments FRAME2 can be arranged consecutively. Third frame segments FRAME3 and fourth frame segments FRAME4 can be arranged alternately. The arrangement pattern of third frame segments FRAME3 and fourth frame segments FRAME4 can be repeated x times, and then arranged between first frame segments FRAME1 and second frame segments FRAME2. Here, x is an integer greater than 0.

[0122] In other words, at least one third frame segment FRAME3 and at least one fourth frame segment FRAME4 can be located between the end point of the consecutive first frame segment FRAME1 and the start point of the consecutive second frame segment FRAME2. Here, at least one third frame segment FRAME3 and at least one fourth frame segment FRAME4 can alternate with each other at regular intervals.

[0123] Because the user perceives the masking periods of q horizontal time intervals, the (virtual) masking periods of q+(1 / 2)u horizontal time intervals, and the masking periods of q+1u horizontal time intervals sequentially over time, the user will not perceive unnecessary changes in brightness. This can be used when the displayed image is changed from a still or static image to a moving or video image, or when the displayed image is changed from a moving or video image with minor changes to a moving or video image with significant changes. Figure 11 Examples of implementations.

[0124] Reference Figure 12 The diagram shows the first frame segment FRAME1, the third frame segment FRAME3, the fourth frame segment FRAME4, and the second frame segment FRAME2. The first frame segment FRAME1 has q+1u horizontal masking segments, the third frame segment FRAME3 has q horizontal masking segments, the fourth frame segment FRAME4 has q+1u horizontal masking segments, and the second frame segment FRAME2 has q horizontal masking segments.

[0125] In other words, the first frame segment FRAME1 and the second frame segment FRAME2 can have different masking periods. The third frame segment FRAME3, which is between the first frame segment FRAME1 and the second frame segment FRAME2, can have the same masking period as the second frame segment FRAME2. The fourth frame segment FRAME4, which is between the first frame segment FRAME1 and the second frame segment FRAME2, can have the same masking period as the first frame segment FRAME1.

[0126] According to some example embodiments, two or more first frame segments FRAME1 can be arranged consecutively, and two or more second frame segments FRAME2 can be arranged consecutively. Third frame segments FRAME3 and fourth frame segments FRAME4 can be arranged alternately. The arrangement pattern of third frame segments FRAME3 and fourth frame segments FRAME4 can be repeated x times, and then arranged between first frame segments FRAME1 and second frame segments FRAME2. Here, x is an integer greater than 0.

[0127] Because the user perceives the masking periods of q+1u horizontal time intervals, the (virtual) masking periods of q+(1 / 2)u horizontal time intervals, and the masking periods of q horizontal time intervals sequentially over time, the user will not perceive unnecessary changes in brightness. This can be used when the displayed image changes from a moving or video image to a still or static image, or when the displayed image changes from a moving or video image with a large amount of change to a moving or video image with a small amount of change. Figure 12 Examples of implementations.

[0128] Figure 13 and Figure 14 This is a diagram illustrating further operation of the masking duty cycle controller and scan start signal generator according to some example embodiments of the present disclosure.

[0129] The masking duty cycle controller 16 can receive first masking duty cycle information BDY1 and supply second masking duty cycle information BDY2 based on the first masking duty cycle information BDY1. The first masking duty cycle information BDY1 may include information about a first masking period, and the second masking duty cycle information BDY2 may include information about a second masking period. The masking duty cycle controller 16 can determine a second masking period of at least two consecutive frame periods based on a single first masking period.

[0130] For example, when the first masking period included in the first masking duty cycle information BDY1 is q+(1 / 3)u horizontal time periods for the Nth frame time period FPN, the N+1th frame time period FP(N+1), and the N+2th frame time period FP(N+2), the masking duty cycle controller 16 can determine the masking period BDN of the Nth frame time period FPN as q horizontal time periods, the masking period BD(N+1) of the N+1th frame time period FP(N+1) as q horizontal time periods, and the masking period BD(N+2) of the N+2th frame time period FP(N+2) as q+1u horizontal time periods. That is, because the scan start signal generator 17 may not be able to generate the second scan start pulse STP2 with a spacing of q+(1 / 3)u horizontal time periods, the masking duty cycle controller 16 can provide a second masking period that enables the scan start signal generator 17 to operate.

[0131] In addition, with Figure 13 and Figure 14 Unlike the previous example, the masking duty cycle controller 16 can determine the masking period BDN of the Nth frame time period FPN as q+1u horizontal time periods, the masking period BD(N+1) of the N+1th frame time period FP(N+1) as q horizontal time periods, and the masking period BD(N+2) of the N+2th frame time period FP(N+2) as q horizontal time periods. In other words, the masking duty cycle controller 16 can determine a second masking period such that the average value of the second masking period is the same as the average value of the first masking period.

[0132] The scan start signal generator 17 can receive the second masking duty cycle information BDY2, and supply a scan start signal including a first scan start pulse STP1 and a second scan start pulse STP2 based on the second masking duty cycle information BDY2. The second scan start pulse STP2 can be generated in the same frame time period as its corresponding first scan start pulse STP1.

[0133] The scan start signal generator 17 can supply a first scan start pulse STP1 and a second scan start pulse STP2 in each frame period, and can determine the interval between the time of generating the first scan start pulse STP1 and the time of generating the second scan start pulse STP2 based on the second masking period corresponding to each frame period.

[0134] For example, the scan start signal generator 17 can generate a second scan start pulse STP2 q horizontal time intervals before the time when the first scan start pulse STP1 of the N+1 frame time interval FP(N+1) is generated. Therefore, a masking time interval BDN with a length of q horizontal time intervals can be implemented in the Nth frame time interval FPN.

[0135] Furthermore, the scan start signal generator 17 can generate a second scan start pulse STP2 q horizontal time intervals before the time when the first scan start pulse STP1 of the N+2 frame time interval FP(N+2) is generated. Therefore, a masking time interval BD(N+1) with a length of q horizontal time intervals can be implemented in the N+1 frame time interval FP(N+1).

[0136] Furthermore, the scan start signal generator 17 can generate a second scan start pulse STP2 q+1u horizontal time intervals before the moment when the first scan start pulse STP1 of the N+3 frame time interval FP (N+3) is generated. Therefore, a masking time interval BD (N+2) with a length of q+1u horizontal time intervals can be implemented in the N+2 frame time interval FP (N+2).

[0137] According to some example embodiments, a user of display device 10 can perceive a masking period of q+(1 / 3)u horizontal time periods in each of the Nth frame time period FPN, the N+1th frame time period FP(N+1), and the N+2th frame time period FP(N+2). That is, according to some example embodiments, the virtual masking period of q+(1 / 3)u horizontal time periods can be implemented using a time-division driving method. In other words, a virtual masking period that is slightly increased by a fractional multiple of unit u based on the previous masking period is displayed, thereby preventing the user from perceiving unnecessary brightness changes.

[0138] Figure 15 This is a diagram showing the changes in actual brightness and perceived brightness when the masking period is changed in conventional techniques. Figure 16 This is a graph illustrating the changes in actual brightness and perceived brightness when the masking period is changed according to some example embodiments of the present disclosure.

[0139] Reference Figure 15 and Figure 16 This shows the situation where the cover time gradually decreases.

[0140] exist Figure 15 As shown in the example, the masking period gradually decreases in integer multiples of unit u, thus causing users to perceive unnecessary changes in brightness.

[0141] exist Figure 16 In the case shown, the masking period gradually decreases in fractions of a unit u, thereby preventing or reducing situations where users perceive unnecessary or undesirable changes in brightness.

[0142] Figure 17 This is a diagram illustrating a display device according to another embodiment of the present disclosure.

[0143] Reference Figure 17 The data driver 12 and sensor 15 of the display device 10' can be configured as a single component. For example, the data driver 12 and sensor 15 can be configured as a single integrated chip (IC) 125.

[0144] Figure 17 Other components of the display device 10' and Figure 1 The other components of the display device 10 are the same, therefore, repeated descriptions will be omitted.

[0145] The display device and driving method of the present disclosure subdivide the changes in the masking period, thereby preventing or reducing the user's perception of changes in brightness even when the masking period is changed.

[0146] The accompanying drawings and detailed description of this disclosure are exemplary and provided for illustrative purposes, not for limiting the scope of the disclosure as described in the claims. Therefore, it will be understood by those skilled in the art that various modifications can be made and other embodiments are available. Accordingly, the scope of this disclosure should be determined by the spirit and scope of the appended claims and their equivalents.

Claims

1. A display device, the display device comprising: The first pixel is combined with the first scan line and the data line; The second pixel is combined with the second scan line and the data line; as well as A scan driver is configured to sequentially supply scan signals with an on level to the first scan line and the second scan line during a first time period, and concurrently supply scan signals with an on level to the first scan line and the second scan line during a second time period after the first time period. in: The masking period corresponds to the difference between the start point of the second period in the current frame period and the start point of the first period in the next frame period. The first frame period and the second frame period have different masking periods. The third frame period between the first frame period and the second frame period has the same masking period as the first frame period. The fourth frame period between the first frame period and the second frame period has the same masking period as the second frame period, and The third frame time period and the fourth frame time period are arranged alternately between the first frame time period and the second frame time period.

2. The display device according to claim 1, wherein: Each frame period includes an image display period and the masking period, and The image display period corresponds to the difference between the start point of the first period and the start point of the second period within a frame period.

3. The display device according to claim 1, further comprising: A data driver is configured to apply a data voltage corresponding to the masking grayscale to the data line during the second time period.

4. The display device according to claim 1, further comprising: A scan start signal generator is configured to supply a first scan start pulse and a second scan start pulse to the scan driver, the first scan start pulse corresponding to the start point of the first time period and the second scan start pulse corresponding to the start point of the second time period.

5. The display device according to claim 4, wherein: The interval between the time when the first scan start pulse is generated and the time when the second scan start pulse is generated in the first frame time period is different from the interval between the time when the first scan start pulse is generated and the time when the second scan start pulse is generated in the second frame time period. The interval between the time when the first scan start pulse is generated and the time when the second scan start pulse is generated in the third frame period is equal to the interval between the time when the first scan start pulse is generated and the time when the second scan start pulse is generated in the first frame period, and The interval between the time when the first scan start pulse is generated and the time when the second scan start pulse is generated in the fourth frame period is equal to the interval between the time when the first scan start pulse is generated and the time when the second scan start pulse is generated in the second frame period.

6. The display device according to claim 1, further comprising: The third pixel is combined with the third scan line and the data line; as well as The fourth pixel, combined with the fourth scan line and the data line, in: The scan driver is further configured to supply a scan signal with an on level to the third scan line during a third time period, and to supply a scan signal with an on level to the fourth scan line during a fourth time period. The first time period, the third time period, the second time period, and the fourth time period are sequentially located within a single frame time period.

7. The display device according to claim 6, wherein, The first time period is longer than each of the second, third, and fourth time periods.

8. The display device according to claim 7, wherein, The second time period, the third time period, and the fourth time period have the same length.

9. The display device according to claim 1, wherein, The number of scan signals having a conduction level and output from the scan driver during the second time period in the first frame period is equal to the number of scan signals having a conduction level and output from the scan driver during the second time period in the second frame period.

10. A method of driving a display device, the display device comprising a scan driver, a first pixel coupled to a first scan line and a data line, and a second pixel coupled to a second scan line and the data line, the method comprising: During the first period of each frame time, the scan driver sequentially supplies scan signals with on level to the first scan line and the second scan line; as well as During the second time period of each frame period, the scan driver concurrently supplies scan signals with an on level to the first scan line and the second scan line. in: The masking period corresponds to the difference between the start point of the second period in the current frame period and the start point of the first period in the next frame period. The first frame period and the second frame period have different masking periods. The third frame period between the first frame period and the second frame period has the same masking period as the first frame period. The fourth frame period between the first frame period and the second frame period has the same masking period as the second frame period, and The third frame time period and the fourth frame time period are arranged alternately between the first frame time period and the second frame time period.

Images