Display panel, display method thereof, and display device

Abstract

A display panel and its display method and device are disclosed. The display panel includes a plurality of pixel units (P), each pixel unit (P) including a plurality of sub-pixels (P1, P2, P3, P4). Each sub-pixel (P1, P2, P3, P4) includes a pixel driving circuit, a detection compensation circuit, and a driven element. The display panel further includes a detection unit and a compensator. The pixel driving circuit is configured to drive the driven element during an effective display time. The detection compensation circuit is configured to detect the electrical characteristics of the driven element during a blank time. The detection unit is configured to detect whether the currently displayed image is a static image. When it is a static image, it sends a first notification to the compensator. When it is a non-static image, it sends a second notification to the compensator. The compensator is configured to, upon receiving the first notification, compensate the currently displayed image based on the detection result of the detection compensation circuit during the blank time of the currently displayed image. Upon receiving the second notification, it does not compensate the currently displayed image based on the detection result of the detection compensation circuit during the blank time.

Description

Technical Field

[0001] This disclosure relates to, but is not limited to, the field of display technology, and in particular to a display panel, a display method thereon, and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) are active-matrix display devices with advantages such as light emission, ultra-thinness, wide viewing angle, high brightness, high contrast, low power consumption, and extremely fast response speed. Based on the driving method, OLEDs can be divided into two types: passive matrix (PM) and active matrix (AM). AMOLEDs are current-driven devices that use independent thin-film transistors (TFTs) to control each sub-pixel, allowing each sub-pixel to emit light continuously and independently. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0004] This disclosure provides a display panel including a plurality of pixel units, at least one pixel unit including a plurality of sub-pixels, and at least one sub-pixel including a pixel driving circuit, a detection compensation circuit and a driven element. The display panel further includes a detection unit and a compensator.

[0005] The pixel driving circuit is configured to drive the driven element to emit light during the effective display time;

[0006] The detection compensation circuit is configured to detect the electrical characteristics of the element to be driven during idle time.

[0007] The detection unit is configured to detect whether the currently displayed screen is a static screen. When the currently displayed screen is a static screen, it sends a first notification to the compensator; when the currently displayed screen is a non-static screen, it sends a second notification to the compensator.

[0008] The compensator is configured to, upon receiving a first notification, compensate the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen; and upon receiving a second notification, not compensate the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen.

[0009] This disclosure also provides a display device, including a display panel as described in any embodiment of this disclosure.

[0010] This disclosure also provides a display method for a display panel, the display panel including a plurality of pixel units, at least one pixel unit including a plurality of sub-pixels, at least one sub-pixel including a pixel driving circuit, a detection compensation circuit and a driven element, the display panel further including: a detection unit and a compensator, the display method including:

[0011] The detection unit detects whether the currently displayed screen is a static screen. When the currently displayed screen is a static screen, it sends a first notification to the compensator; when the currently displayed screen is a non-static screen, it sends a second notification to the compensator.

[0012] When the compensator receives the first notification, it compensates the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen.

[0013] When the compensator receives the second notification, it does not compensate the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen.

[0014] After reading and understanding the accompanying diagrams and detailed descriptions, other aspects can be understood. Attached Figure Description

[0015] The accompanying drawings are used to provide an understanding of the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure.

[0016] Figure 1 This is a schematic diagram of the structure of a display device;

[0017] Figure 2 This is a schematic diagram of a planar structure of a display panel;

[0018] Figure 3 This is a schematic diagram of an equivalent circuit for a pixel driving circuit.

[0019] Figure 4 This is a schematic diagram of real-time voltage output detection in a static image.

[0020] Figure 5 This is a schematic diagram of real-time voltage output detection under a non-static image.

[0021] Figure 6 This is a schematic diagram of the structure of a display panel as an exemplary embodiment of the present disclosure;

[0022] Figure 7 This is a schematic diagram illustrating the connection relationship between a pixel driving circuit and a detection compensation circuit, which is an exemplary embodiment of this disclosure.

[0023] Figure 8 A flowchart illustrating the display process of a display panel as an exemplary embodiment of this disclosure;

[0024] Figure 9 for Figure 8 The diagram shown is the GOA clock timing waveform corresponding to the display process.

[0025] Figure 10 This is a flowchart illustrating the display process of another display panel as an exemplary embodiment of the present disclosure;

[0026] Figure 11 This is a flowchart illustrating the display process of another display panel as an exemplary embodiment of the present disclosure.

[0027] Figure 12 This is a schematic diagram illustrating a display panel display method as an exemplary embodiment of the present disclosure. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The implementation can be carried out in many different forms. Those skilled in the art will readily understand that the methods and content can be varied in various forms without departing from the spirit and scope of this disclosure. Therefore, this disclosure should not be construed as limited to the contents described in the following embodiments. Without conflict, the embodiments and features in the embodiments of this disclosure can be arbitrarily combined with each other.

[0029] The scale of the accompanying drawings in this disclosure can be used as a reference in actual manufacturing processes, but is not limited thereto. For example, the aspect ratio of the channel, the thickness and spacing of each film layer, and the width and spacing of each signal line can be adjusted according to actual needs. The number of pixels in the display panel and the number of sub-pixels in each pixel are not limited to the quantities shown in the figures. The accompanying drawings described in this disclosure are merely structural schematic diagrams, and one aspect of this disclosure is not limited to the shapes or values ​​shown in the figures.

[0030] The ordinal numbers “first,” “second,” and “third” used in this specification are used to avoid confusion among the constituent elements, not to limit their quantity.

[0031] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately varied depending on the orientation of each constituent element being described. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0032] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the specific meaning of these terms in this disclosure based on the specific circumstances.

[0033] In this specification, a transistor is a device that includes at least three terminals: a gate electrode, a drain electrode, and a source electrode. A transistor has a channel region between the drain electrode (drain electrode terminal, drain region, or drain electrode) and the source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to the region through which current primarily flows.

[0034] In this specification, the first electrode can be the drain electrode and the second electrode can be the source electrode, or vice versa. In cases where transistors with opposite polarities are used or the current direction changes during circuit operation, the functions of the "source electrode" and "drain electrode" may sometimes be interchanged. Therefore, in this specification, the "source electrode" and "drain electrode" can be interchanged, and the "source terminal" and "drain terminal" can be interchanged.

[0035] In this specification, "electrical connection" includes the situation where components are connected together by elements that have a certain electrical function. There are no particular limitations on what constitutes an "electrical function," as long as it allows for the transmission and reception of electrical signals between the connected components. Examples of "electrical functions" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements with various functions.

[0036] In this specification, "parallel" refers to the state where the angle formed by two straight lines is greater than or equal to -10° and less than 10°, and therefore also includes the state where the angle is greater than or equal to -5° and less than 5°. Similarly, "perpendicular" refers to the state where the angle formed by two straight lines is greater than or equal to 80° and less than 100°, and therefore also includes the state where the angle is greater than or equal to 85° and less than 95°.

[0037] In this specification, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may sometimes be replaced with "conductive film." Similarly, "insulating film" may sometimes be replaced with "insulating layer."

[0038] In this specification, triangles, rectangles, trapezoids, pentagons, or hexagons are not strictly defined; they can be approximate triangles, rectangles, trapezoids, pentagons, or hexagons. Small deformations due to tolerances are possible, as are chamfers, curved edges, and other variations.

[0039] In this disclosure, “about” means a value that is not strictly limited and allows for process and measurement errors.

[0040] Figure 1 This is a schematic diagram of the structure of a display device. Figure 1As shown, the display device may include a timing controller, a data signal driver, a scan signal driver, and a pixel array. The timing controller is connected to both the data signal driver and the scan signal driver. The data signal driver is connected to multiple data signal lines (D1 to Dn), and the scan signal driver is connected to multiple scan signal lines (S1 to Sm). The pixel array may include multiple sub-pixels Pxij, where i and j can be natural numbers. At least one sub-pixel Pxij may include a circuit unit and a light-emitting device connected to the circuit unit. The circuit unit may include at least one scan signal line, at least one data signal line, and a pixel driving circuit. In an exemplary embodiment, the timing controller may provide grayscale values ​​and control signals of specifications suitable for the data signal driver to the data signal driver, and may provide clock signals, scan start signals, etc., of specifications suitable for the scan signal driver to the scan signal driver. The data signal driver may use the grayscale values ​​and control signals received from the timing controller to generate data voltages to be provided to the data signal lines D1, D2, D3, ..., Dn. For example, a data signal driver can sample grayscale values ​​using a clock signal and apply data voltages corresponding to the grayscale values ​​to data signal lines D1 to Dn, where n can be a natural number, on a pixel-by-pixel basis. A scan signal driver can generate scan signals to be provided to scan signal lines S1, S2, S3, ..., Sm by receiving clock signals, scan start signals, etc., from a timing controller. For example, a scan signal driver can sequentially provide scan signals with on-level pulses to scan signal lines S1 to Sm. For example, a scan signal driver can be configured as a shift register and can generate scan signals by sequentially transmitting scan start signals in the form of on-level pulses to the next stage circuit under the control of a clock signal, where m can be a natural number.

[0041] Figure 2 This is a schematic diagram of a planar structure of a display panel. (Example) Figure 2 As shown, the display panel may include multiple pixel units P arranged in a matrix. At least one of the multiple pixel units P includes a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, a third sub-pixel P3 emitting a third color light, and a fourth sub-pixel P4 emitting a fourth color light. Each of the four sub-pixels may include a circuit unit and a light-emitting device. The circuit unit may include a scan signal line, a data signal line, and a pixel driving circuit. The pixel driving circuit is electrically connected to the scan signal line and the data signal line, respectively. The pixel driving circuit is configured to receive the data voltage transmitted by the data signal line under the control of the scan signal line and output a corresponding current to the light-emitting device. The light-emitting device in each sub-pixel is connected to the pixel driving circuit of the sub-pixel, and the light-emitting device is configured to emit light of a corresponding brightness in response to the current output by the pixel driving circuit of the sub-pixel.

[0042] In an exemplary embodiment, the first sub-pixel P1 may be a red sub-pixel (R) that emits red light, the second sub-pixel P2 may be a green sub-pixel (G) that emits green light, the third sub-pixel P3 may be a white sub-pixel (W) that emits white light, and the fourth sub-pixel P4 may be a blue sub-pixel (B) that emits blue light.

[0043] In an exemplary embodiment, the shape of the sub-pixels can be rectangular, rhomboid, pentagonal, or hexagonal. In one exemplary embodiment, four sub-pixels can be arranged horizontally side-by-side to form an RWBG pixel arrangement. In another exemplary embodiment, the four sub-pixels can be arranged in a square, diamond, or vertically side-by-side arrangement, etc., which is not limited herein.

[0044] In an exemplary embodiment, multiple sub-pixels arranged sequentially in the horizontal direction are called pixel rows, and multiple sub-pixels arranged sequentially in the vertical direction are called pixel columns. Multiple pixel rows and multiple pixel columns constitute a pixel array arranged in an array.

[0045] In an exemplary embodiment, the pixel driving circuit may be a 3T1C, 4T1C, 5T1C, 5T2C, 6T1C, 7T1C or 8T1C structure. Figure 3 This is a schematic diagram of an equivalent circuit for a pixel driving circuit. (Example) Figure 3 As shown, the pixel driving circuit is a 3T1C structure, which may include 3 transistors (first transistor T1, second transistor T2 and third transistor T3), 1 storage capacitor C and 6 signal lines (data signal line D, first scan signal line G1, second scan signal line G2, compensation signal line S, first power supply line VDD and second power supply line VSS).

[0046] In an exemplary embodiment, the first transistor T1 is a switching transistor, the second transistor T2 is a driving transistor, and the third transistor T3 is a compensation transistor. The first terminal of the storage capacitor C is coupled to the control terminal of the second transistor T2, and the second terminal of the storage capacitor C is coupled to the second terminal of the second transistor T2. The storage capacitor C is used to store the potential of the control terminal of the second transistor T2. The control terminal of the first transistor T1 is coupled to the first scan signal line G1, the first terminal of the first transistor T1 is coupled to the data signal line D, and the second terminal of the first transistor T1 is coupled to the control terminal of the second transistor T2. The first transistor T1, under the control of the first scan signal line G1, receives the data signal transmitted through the data signal line D, causing the control terminal of the second transistor T2 to receive the data signal. The control terminal of the second transistor T2 is coupled to the second terminal of the first transistor T1, the first terminal of the second transistor T2 is coupled to the first power supply line VDD, and the second terminal of the second transistor T2 is coupled to the first terminal (anode) of the light-emitting device. The second transistor T2, under the control of the data signal received at its control terminal, generates a corresponding current at its second terminal. The control electrode of the third transistor T3 is coupled to the second scan signal line G2, the first electrode of the third transistor T3 is coupled to the compensation signal line S, and the second electrode of the third transistor T3 is coupled to the second electrode of the second transistor T2. The third transistor T3 is used to extract the threshold voltage Vth and mobility of the second transistor T2 in response to the compensation timing, so as to compensate for the threshold voltage Vth. The second electrode (cathode) of the light-emitting device is connected to the second power supply line VSS.

[0047] In an exemplary embodiment, the light-emitting device may be an OLED, which includes a first electrode (anode), an organic light-emitting layer, and a second electrode (cathode) stacked together. The first electrode of the OLED is coupled to the second electrode of the second transistor T2, and the second electrode of the OLED is coupled to the second power line VSS. The OLED is used to emit light of corresponding brightness in response to the current of the second electrode of the second transistor T2.

[0048] In an exemplary embodiment, the first power line VDD continuously provides a high-level signal, while the second power line VSS provides a low-level signal. The first transistor T1 to the third transistor T3 can be either P-type or N-type transistors. Using the same type of transistor in the pixel driving circuit simplifies the manufacturing process, reduces the manufacturing difficulty of the display panel, and improves product yield.

[0049] In an exemplary embodiment, the first transistor T1 to the third transistor T3 can be a low-temperature polycrystalline silicon (LTPS) thin-film transistor, or an oxide thin-film transistor, or a combination of both. The active layer of the LTPS is made of low-temperature polycrystalline silicon, while the active layer of the oxide thin-film transistor is made of oxide. LTPS transistors have advantages such as high mobility and fast charging, while oxide thin-film transistors have advantages such as low leakage current. In an exemplary embodiment, LTPS and oxide thin-film transistors can be integrated onto a single display panel to form a low-temperature polycrystalline oxide (LTPO) display panel. This leverages the advantages of both, enabling high resolution (Pixels Per Inch, PPI), low-frequency driving, reduced power consumption, and improved display quality. In an exemplary embodiment, the light-emitting device can be an organic light-emitting diode (OLED), comprising a stacked first electrode (anode), an organic light-emitting layer, and a second electrode (cathode).

[0050] Each frame in an OLED display device is divided into active time and blank time. During the active time, the OLED display device uses the pixel driving circuit to output and display normal data. During the blank time, it uses a detection and compensation circuit for external real-time detection and compensation (Real TimeSense). The OLED display device performs real-time compensation during the blank time of each frame, detecting changes in the TFT characteristics of the panel devices, and then improving the display quality through external compensation. However, if the displayed content switches frequently, or if the data differences between adjacent frames are large, it will affect the stability of the charging voltage for real-time compensation during blank time, causing fluctuations in the detection results and resulting in visible fine horizontal lines on the compensated image.

[0051] like Figure 4 As shown, when the current display screen is a static screen (Still_flag = H), the display data of the nth frame, the (n+1)th frame, and the (n+2)th frame are the same. At this time, the detection voltage Vsense output by the blank time data signal line D is stable, and the compensation effect is also very good.

[0052] like Figure 5 As shown, when the currently displayed screen is a non-static screen (Still_flag = L), the display data for the nth frame, the (n+1)th frame, and the (n+2)th frame are V respectively. data_n Vdata_n+1 V data_n+2 At this time, although the blank time data signal line D is given the output detection voltage V sense However, due to the changes in displayed data between adjacent frames, the detected voltage V in each frame changes. sense There is jitter; the detected voltage V in frames n, n+1, and n+2 is... sense After being interfered with, they respectively become V sense1' V sense2' V sense3' This causes the detection results to deviate, resulting in visible horizontal fine lines appearing on the compensated image.

[0053] like Figure 6 As shown, this disclosure provides a display panel including a plurality of pixel units P, at least one pixel unit P including a plurality of sub-pixels, and at least one sub-pixel including a pixel driving circuit (not shown), a detection compensation circuit (not shown), and a driven element (not shown). The display panel further includes a detection unit and a compensator, wherein:

[0054] The pixel driving circuit is configured to drive the driven element to emit light during the effective display time.

[0055] The detection compensation circuit is configured to detect the electrical characteristics of the element to be driven during the blank time.

[0056] The detection unit is configured to detect whether the currently displayed screen is a static screen. When the currently displayed screen is a static screen, it sends a first notification to the compensator; when the currently displayed screen is a non-static screen, it sends a second notification to the compensator.

[0057] The compensator is configured to, upon receiving a first notification, compensate the currently displayed screen based on the detection results of the compensation circuit during the blank time of the currently displayed screen; and upon receiving a second notification, not compensate the currently displayed screen based on the detection results of the compensation circuit during the blank time of the currently displayed screen.

[0058] The display panel provided in this embodiment determines whether the displayed image is static during the display process. If it is static, real-time detection and compensation are performed; otherwise, real-time detection and compensation are not performed, or only real-time detection is performed without updating the compensation data, so as to maintain the accuracy of the real-time detection and compensation data. This can effectively shield the phenomenon of fine horizontal lines appearing on the compensated display image due to image changes.

[0059] Figure 7 This is a schematic diagram illustrating the connection relationship between a pixel driving circuit and a detection compensation circuit, which is an exemplary embodiment of this disclosure. Figure 7The pixel driving circuit in the present invention has a 3T1C structure, including three transistors (first transistor T1, second transistor T2, and third transistor T3) and one storage capacitor C. However, this embodiment is not limited to this, and the pixel driving circuit may also include other numbers of transistors and storage capacitors. The pixel driving circuit is configured to receive the data voltage transmitted by the data signal line under the control of the scan signal line and output a corresponding current to the element to be driven.

[0060] In some exemplary implementations, such as Figure 7 As shown, the detection compensation circuit is connected to the compensation signal line S to obtain the amount of charge flowing through the element to be driven within a preset detection time (i.e. blank time), so that the external compensator can calculate the compensation gain value of the element to be driven based on the obtained amount of charge.

[0061] In some exemplary embodiments, the compensator does not compensate for the currently displayed image based on the detection results of the compensation circuit during the blank time, including the following four cases:

[0062] The first type: The detection and compensation circuit does not detect the electrical characteristics of the driven element during the blank time of the currently displayed screen. At this time, the compensator can make compensation based on the unupdated compensation data.

[0063] The second type: The detection and compensation circuit does not detect the electrical characteristics of the driven element during the blank time of the currently displayed screen. In this case, the compensator does not need to perform compensation.

[0064] The third type: The detection compensation circuit detects the electrical characteristics of the driven element during the blank time of the currently displayed screen, but the compensator does not compensate the currently displayed screen based on the detection results of the detection compensation circuit during the blank time of the currently displayed screen. In this case, the compensator can compensate based on the unupdated compensation data.

[0065] The fourth type: The detection compensation circuit detects the electrical characteristics of the driven element during the blank time of the currently displayed screen, but the compensator does not compensate the currently displayed screen based on the detection results of the detection compensation circuit during the blank time of the currently displayed screen. In this case, the compensator may not perform compensation.

[0066] In this embodiment of the disclosure, the unupdated compensation data can be the detection results of the detection compensation circuit during the non-blank time before the current display screen.

[0067] Figure 8 This is a flowchart illustrating the display process of a display panel according to an embodiment of the present disclosure, as follows: Figure 8As shown, when displaying a screen, the display device determines whether the current image is static. If it is static, real-time detection is performed, and the compensation data is updated after detection. If it is not static, real-time detection is not performed, and the unupdated compensation data is used for compensation. This effectively prevents horizontal fine lines from appearing on the compensated display image due to deviations in real-time detection results caused by large differences in data between adjacent frames during the display process.

[0068] The corresponding GOA clock timing waveform for this technical solution is as follows: Figure 9 As shown, STU is the start flag for each frame, CLK1 to CLK4 are a set of clocks for GOA, and Still_flag is the static image judgment flag. Still_flag is "H" for static images and "L" otherwise. When the currently displayed image is static, the detection compensation circuit detects the electrical characteristics of the driven components during the blank time of the currently displayed image. The compensator compensates the currently displayed image based on the detection results of the detection compensation circuit during the blank time of the currently displayed image. When the currently displayed image is non-static, the detection compensation circuit does not detect the electrical characteristics of the driven components during the blank time of the currently displayed image, and the compensator uses the unupdated compensation data to compensate the currently displayed image.

[0069] Figure 10 This is a flowchart illustrating the display process of another display panel according to an embodiment of this disclosure, as follows: Figure 10 As shown, during display, the blank non-display time of each frame is detected in real time, and a static image determination is performed. If the displayed image is static, the compensation data is updated; if the displayed image is non-static, the compensation data is not updated, and the previous compensation data is still used. This embodiment can also prevent the appearance of horizontal fine lines in the compensated display image due to deviations in real-time detection results caused by large differences in data between adjacent frames during the display process.

[0070] In this embodiment, when using the first scenario, the detection unit can send a third notification to the timing controller. Upon receiving the third notification, the timing controller adjusts the timing of the clock signal output to the scan signal driver so that the detection compensation circuit does not perform detection during the blank time. When using the second scenario, the detection compensation circuit detects the electrical characteristics of the driven element during the blank time of the currently displayed screen, but the compensator does not compensate the currently displayed screen based on the detection results of the detection compensation circuit during the blank time of the currently displayed screen. In this case, the detection unit does not need to notify the timing controller to change the timing of the output clock signal; the timing controller still outputs the clock signal to the scan signal driver according to the originally set timing.

[0071] In some exemplary embodiments, the display panel further includes a timing controller, a scan signal driver, and a data signal driver, wherein:

[0072] The detection unit is also configured to send a third notification to the timing controller when the currently displayed screen is a non-static screen;

[0073] The timing controller is configured to output a clock signal and a scan start signal to the scan signal driver, and to output a first data signal to the data signal driver; it is also configured to, upon receiving a third notification, adjust the timing of the clock signal output to the scan signal driver so that the detection compensation circuit does not perform detection during the blank time of the currently displayed screen.

[0074] A data signal driver is configured to receive a first data signal output by a timing controller, convert the first data signal into a data voltage for pixel charging of a pixel unit, and output it to multiple data lines.

[0075] The scan signal driver is configured to receive the clock signal and scan start signal output by the timing controller, generate scan signals based on the received clock signal and scan start signal, and output them to multiple scan signal lines.

[0076] In some exemplary embodiments, the scan signal driver may include multiple cascaded GOA circuits.

[0077] In some exemplary implementations, such as Figure 7 As shown, the detection compensation circuit includes a current integrator, a sampling switch, and an analog-to-digital converter, wherein:

[0078] One end of the current integrator is connected to the compensation signal line S, and the other end of the current integrator is connected to the first path terminal of the sampling switch.

[0079] The second terminal of the sampling switch is connected to the first terminal of the analog-to-digital converter, and the control terminal of the sampling switch receives the sampling signal.

[0080] The second end of the analog-to-digital converter is connected to the compensator.

[0081] In some exemplary embodiments, the compensator compensates for the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen, including:

[0082] The compensator calculates the voltage difference corresponding to the amount of charge flowing through the driven element during a preset detection time (i.e., the blank time of the currently displayed screen);

[0083] The compensator obtains the compensation gain value of the driven element based on the calculated voltage difference.

[0084] In some exemplary implementations, such as Figure 6 As shown, the display panel also includes a memory configured to store a first detection result, which is the detection result of the detection compensation circuit during the non-blank time before the current display screen;

[0085] When the second notification is received, the compensator is also configured to: detect whether the memory stores the first detection result; when the memory stores the first detection result, use the first detection result to compensate the currently displayed screen.

[0086] In some other exemplary embodiments, when a second notification is received, the compensator is further configured to: detect whether the memory stores the first detection result; and when the memory does not store the first detection result, not to compensate the currently displayed screen.

[0087] In some exemplary embodiments, the first detection result may be the detection result at power-on, the detection result at power-off, or the detection result at a user-specified time.

[0088] In this embodiment of the present disclosure, during the power-on operation phase of the display device, the detection unit can determine whether it is necessary to perform power-on detection on the electrical compensation parameters of the display device; when it is necessary to perform power-on detection on the electrical compensation parameters of the display device, the following power-on operation is performed: the electrical compensation parameters of the display device are detected, new compensation parameter values ​​are obtained, and they are stored in the memory.

[0089] During the power-off operation phase of the display device, the detection unit can determine whether it is necessary to perform power-off detection on the electrical compensation parameters of the display device. When it is necessary to perform power-off detection on the electrical compensation parameters of the display device, the following power-off operation is performed: the electrical compensation parameters of the display device are detected during power-off, the updated compensation parameter values ​​are obtained, and they are stored in the memory.

[0090] During the operation of the display device, the detection unit can also detect the electrical compensation parameters of the display device according to the detection time specified by the user, obtain updated compensation parameter values, and store them in the memory.

[0091] In some exemplary embodiments, the electrical compensation parameters include the threshold voltage and / or mobility of the driving transistor of each pixel unit, and / or the threshold voltage of the light-emitting element of each pixel unit.

[0092] In some exemplary embodiments, the detection unit detects whether the currently displayed screen is a static screen, including:

[0093] The system detects whether there is a difference between the data of the currently displayed frame and the data of the first frame, or whether the difference between the data of the currently displayed frame and the data of the first frame is less than a preset value. The first frame is the x-th frame before the currently displayed frame or a preset reference frame, where x is a natural number greater than or equal to 1.

[0094] For example, when x = 1, the first frame is the first frame before the currently displayed frame. In this embodiment of the present disclosure, the detection unit can determine that the currently displayed frame is a static frame relative to the previous frame when it detects that there is no difference between the data of two adjacent frames, or it can determine that the currently displayed frame is a static frame relative to the previous frame when it detects that the difference between the data of two adjacent frames is less than a preset value.

[0095] In this embodiment of the present disclosure, the detection unit can sum up all the data of the currently displayed screen and all the data of the first screen respectively, and detect whether there is a difference between the data of the currently displayed screen and the data of the first screen based on whether the summation results are the same or different, or detect whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value. Using this method, the detection unit can detect whether the screen is a static screen before the screen is displayed. However, this embodiment of the present disclosure does not limit this.

[0096] In this embodiment of the disclosure, when the detection unit detects whether there is a difference between the data of the currently displayed screen and the data of the first screen, or detects whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value, the data of the currently displayed screen and the data of the first screen can be brightness data (or grayscale data). The size of the preset value can be set according to the range size of the brightness data. For example, the preset value can be 100.

[0097] In some exemplary embodiments, the detection unit detects whether the currently displayed screen is a static screen, including:

[0098] Within a preset display area, detect whether there is a difference between the data of the currently displayed screen and the data of the first screen, or within a preset display area, detect whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value.

[0099] For example, the preset display area can be row i1 to row j1, where i1 and j1 are both natural numbers, and j1 > i1.

[0100] In this embodiment of the disclosure, the size of the preset display area can be set as needed. For example, the preset display area can be the i2th column to the j2th column, or the preset display area can be the area enclosed by the i1th row to the j1st row and the i2th column to the j2nd column. This embodiment of the disclosure does not limit this.

[0101] In some exemplary embodiments, the detection unit detects whether the currently displayed screen is a static screen, including:

[0102] For a sub-pixel of a preset color, detect whether there is a difference between the data of the currently displayed image and the data of the first image; or, for a sub-pixel of a preset color, detect whether the difference between the data of the currently displayed image and the data of the first image is less than a preset value.

[0103] For example, the sub-pixel of the preset color can be a sub-pixel of any color, such as a red sub-pixel, a green sub-pixel, a blue sub-pixel, or a white sub-pixel.

[0104] In some exemplary embodiments, the detection unit is specifically configured as follows:

[0105] The system detects whether the image displayed at the first display time is a static image relative to the first image, and whether the image displayed at the second display time is a static image relative to the second image. The first image is the x-th frame before the image displayed at the first display time or a preset reference image, and the second image is the x-th frame before the image displayed at the second display time or a preset reference image, where x is a natural number greater than or equal to 1.

[0106] When both the first display time and the second display time display static images, a first notification is sent to the compensator.

[0107] If either the first display time or the second display time displays a non-static image, a second notification is sent to the compensator.

[0108] In some exemplary embodiments, the compensator compensates the currently displayed screen based on the detection results of the detection compensation circuit during the blank time of the currently displayed screen, including: the compensator compensates the currently displayed screen (i.e. the screen displayed during the second display time) based on the detection results of the detection compensation circuit during the blank time between the first display time and the second display time.

[0109] Figure 11This is a flowchart illustrating the display process of another display panel according to an embodiment of the present disclosure. When displaying, the display device determines whether the current screen is a static screen and marks it as still_flag1. Real-time detection is performed during the blank non-display time of each frame. After detection, a static screen determination is performed again, marked as still_flag2. If both determinations indicate a static screen (still_flag1 & still_flag2 = H), compensation data is updated. If either determination indicates a non-static screen (still_flag1 = L or still_flag2 = L), the compensation data is not updated, and the previous compensation data is used. This embodiment performs dual static screen determination, which avoids the problem of horizontal fine lines appearing in the compensated display screen due to deviations in real-time detection results caused by sudden screen changes during the start and end of detection, resulting in large data differences between adjacent frames.

[0110] like Figure 12 As shown in the embodiments of this disclosure, a display panel display method is also provided. The display panel includes a plurality of pixel units, at least one pixel unit includes a plurality of sub-pixels, and at least one sub-pixel includes a pixel driving circuit, a detection compensation circuit, and a driven element. The display panel further includes a detection unit and a compensator. The display method includes:

[0111] Step 1201: The detection unit detects whether the currently displayed screen is a static screen. When the currently displayed screen is a static screen, it sends a first notification to the compensator; when the currently displayed screen is a non-static screen, it sends a second notification to the compensator.

[0112] Step 1202: When the compensator receives the first notification, it compensates the currently displayed screen based on the detection results of the compensation circuit during the blank time of the currently displayed screen.

[0113] Step 1203: When the compensator receives the second notification, it does not compensate the currently displayed screen based on the detection result of the compensation circuit during the blank time of the currently displayed screen.

[0114] In some exemplary embodiments, the display method further includes:

[0115] When the currently displayed screen is not a static screen, the detection unit sends a third notification to the timing controller;

[0116] Upon receiving the third notification, the timing controller adjusts the timing of the clock signal output to the scan signal driver so that the detection compensation circuit does not perform detection during the blank time of the current display screen.

[0117] In some other exemplary embodiments, when the currently displayed screen is a non-static screen, the detection unit may not send a third notification to the timing controller; the timing controller still outputs the clock signal to the scan signal driver according to the originally set clock signal timing, and the detection compensation circuit detects the electrical characteristics of the driven element during the blank time of the currently displayed screen, but the compensator does not compensate the currently displayed screen according to the detection result of the detection compensation circuit during the blank time of the currently displayed screen.

[0118] In some exemplary embodiments, in step 1203, when the compensator receives the second notification, the display method further includes: detecting whether the memory stores a first detection result, the first detection result being the detection result of the compensation circuit during the non-blank time before the current display screen; when the memory stores the first detection result, using the first detection result to compensate the currently displayed screen.

[0119] In some exemplary implementations, the non-blank time can be any of the following times: power-on, power-off, or user-specified time.

[0120] In some exemplary embodiments, the detection unit detects whether the currently displayed screen is a static screen, including:

[0121] The detection unit detects whether there is a difference between the data of the currently displayed screen and the data of the first screen, or detects whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value. The first screen is the x-th frame before the currently displayed screen or a preset reference screen, where x is a natural number greater than or equal to 1.

[0122] In some exemplary embodiments, the detection unit detects whether the currently displayed screen is a static screen, including:

[0123] Within a preset display area, the detection unit detects whether there is a difference between the data of the currently displayed screen and the data of the first screen, or within a preset display area, it detects whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value. The first screen is the x-th frame preceding the currently displayed screen or a preset reference screen, where x is a natural number greater than or equal to 1.

[0124] In some exemplary embodiments, the preset display area can be the i-th row to the j-th row, where i and j are both natural numbers, and j > i.

[0125] In some exemplary embodiments, the detection unit detects whether the currently displayed screen is a static screen, including:

[0126] For a sub-pixel of a preset color, the detection unit detects whether there is a difference between the data of the currently displayed image and the data of the first image, or for a sub-pixel of a preset color, it detects whether the difference between the data of the currently displayed image and the data of the first image is less than a preset value. The first image is the x-th frame before the currently displayed image or a preset reference image, where x is a natural number greater than or equal to 1.

[0127] In some exemplary embodiments, the preset color subpixel is a red subpixel, a green subpixel, a blue subpixel, or a white subpixel.

[0128] In some exemplary embodiments, step 1201 specifically includes:

[0129] The detection unit detects whether the image displayed at the first display time is a static image relative to the first image, and whether the image displayed at the second display time is a static image relative to the second image. The first image is the x-th frame before the image displayed at the first display time or a preset reference image, and the second image is the x-th frame before the image displayed at the second display time or a preset reference image, where x is a natural number greater than or equal to 1.

[0130] When both the first display time and the second display time display static images, a first notification is sent to the compensator.

[0131] If either the first display time or the second display time displays a non-static image, a second notification is sent to the compensator.

[0132] In some exemplary embodiments, in step 1202, the compensator compensates the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen, including: the compensator compensates the currently displayed screen (i.e. the display screen after the blank time, i.e. the screen displayed during the second display time) based on the detection result of the detection compensation circuit during the blank time between the first display time and the second display time.

[0133] This disclosure also provides an exemplary embodiment of a display device, including the display panel described in any of the foregoing embodiments. The display panel of this disclosure can be applied to display devices having pixel driving circuits and detection compensation circuits, such as OLED, quantum dot display (QLED), light-emitting diode display (Micro LED or Mini LED), or quantum dot light-emitting diode display (QDLED), etc., and is not limited thereto.

[0134] The display device of this disclosure improves the display effect by determining whether the currently displayed screen is a static screen during the display process and adjusting the real-time detection waveform or real-time detection result according to the determination result. This is done to shield the problem of horizontal fine lines in the display screen under non-static screen conditions caused by real-time detection.

[0135] While the embodiments disclosed herein are as described above, the content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit the invention. Any person skilled in the art may make any modifications and changes to the form and details of the implementation without departing from the spirit and scope of this disclosure; however, the patent protection scope of this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A display panel comprising a plurality of pixel units, at least one pixel unit comprising a plurality of sub-pixels, at least one sub-pixel comprising a pixel driving circuit, a detection compensation circuit, and a driven element, the display panel further comprising: Detection unit and compensator; The pixel driving circuit is configured to drive the driven element to emit light during the effective display time; The detection compensation circuit is configured to detect the electrical characteristics of the element to be driven during idle time. The detection unit is configured to detect whether the currently displayed screen is a static screen. When the currently displayed screen is a static screen, it sends a first notification to the compensator; when the currently displayed screen is a non-static screen, it sends a second notification to the compensator. The compensator is configured to, upon receiving a first notification, compensate the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen; and upon receiving a second notification, not compensate the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen.

2. The display panel according to claim 1, wherein, The statement that compensation is not made to the currently displayed image based on the detection results of the detection compensation circuit during the blank time includes any of the following situations: The detection and compensation circuit detects the electrical characteristics of the driven element during the blank time of the currently displayed screen, and the compensator does not compensate for the currently displayed screen. Alternatively, the detection and compensation circuit detects the electrical characteristics of the driven element during the blank time of the currently displayed screen, and the compensator compensates the currently displayed screen according to the first detection result, wherein the first detection result is the detection result of the detection and compensation circuit during the non-blank time before the currently displayed screen. Alternatively, the detection and compensation circuit does not detect the electrical characteristics of the driven element during the blank time of the currently displayed screen, and the compensator does not compensate for the currently displayed screen. Alternatively, the detection and compensation circuit may not detect the electrical characteristics of the driven element during the blank time of the currently displayed screen, and the compensator may compensate the currently displayed screen based on the first detection result.

3. The display panel according to claim 1 further includes a timing controller, a scan signal driver, and a data signal driver, wherein: The detection unit is also configured to send a third notification to the timing controller when the currently displayed screen is a non-static screen. The timing controller is configured to output a clock signal and a scan start signal to the scan signal driver, and to output a first data signal to the data signal driver; it is also configured to, upon receiving a third notification, adjust the timing of the clock signal output to the scan signal driver so that the detection compensation circuit does not perform detection during the blank time of the current display screen. The data signal driver is configured to receive a first data signal output by the timing controller, convert the first data signal into a data voltage for pixel unit pixel charging, and output it to multiple data lines; The scan signal driver is configured to receive the clock signal and scan start signal output by the timing controller, generate a scan signal based on the received clock signal and scan start signal, and output the scan signal to multiple scan signal lines.

4. The display panel according to claim 1, wherein, The detection compensation circuit includes a current integrator, a sampling switch, and an analog-to-digital converter, wherein: One end of the current integrator is connected to the compensation signal line in the pixel driving circuit, and the other end of the current integrator is connected to the first path terminal of the sampling switch. The second terminal of the sampling switch is connected to the first terminal of the analog-to-digital converter, and the control terminal of the sampling switch receives the sampling signal. The second end of the analog-to-digital converter is connected to the compensator.

5. The display panel according to claim 1, wherein, The compensator compensates the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen, including: The compensator calculates the voltage difference corresponding to the amount of charge flowing through the driven element, which is obtained by the detection and compensation circuit during the blank time of the current display screen. The compensator obtains the compensation gain value of the driven element based on the calculated voltage difference.

6. The display panel according to claim 1, further comprising a memory, wherein: The memory is configured to store a first detection result, which is the detection result of the detection compensation circuit during the non-blank time before the current display screen. When the second notification is received, the compensator is further configured to: detect whether the memory stores the first detection result; when the memory stores the first detection result, use the first detection result to compensate the currently displayed screen.

7. The display panel according to claim 6, wherein, The non-blank time is any one of the following times: when the device is powered on, when the device is powered off, or when the user specifies a time.

8. The display panel according to claim 1, wherein, The detection unit detects whether the currently displayed screen is a static screen, including: The system detects whether there is a difference between the data of the currently displayed screen and the data of the first screen, or detects whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value. The first screen is the x-th frame before the currently displayed screen or a preset reference screen, where x is a natural number greater than or equal to 1.

9. The display panel according to claim 8, wherein, The detection unit sums up all the data of the currently displayed screen and all the data of the first screen respectively, and detects whether there is a difference between the data of the currently displayed screen and the data of the first screen based on whether the summation results are the same or different, or detects whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value.

10. The display panel according to claim 1, wherein, The detection unit detects whether the currently displayed screen is a static screen, including: Within a preset display area, it is detected whether there is a difference between the data of the currently displayed screen and the data of the first screen, or within a preset display area, it is detected whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value, wherein the first screen is the x-th frame screen preceding the currently displayed screen or a preset reference screen, where x is a natural number greater than or equal to 1.

11. The display panel according to claim 10, wherein, The preset display area is from row i to row j, where i and j are both natural numbers, and j > i.

12. The display panel according to claim 1, wherein, The detection unit detects whether the currently displayed screen is a static screen, including: For a sub-pixel of a preset color, detect whether there is a difference between the data of the currently displayed screen and the data of the first screen, or for a sub-pixel of a preset color, detect whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value, where the first screen is the x-th frame preceding the currently displayed screen or a preset reference screen, and x is a natural number greater than or equal to 1.

13. The display panel according to claim 12, wherein, The preset color sub-pixels are red sub-pixels, green sub-pixels, blue sub-pixels, or white sub-pixels.

14. The display panel according to claim 1, wherein, The detection unit is specifically configured as follows: The system detects whether the image displayed at the first display time is a static image relative to the first image, and whether the image displayed at the second display time is a static image relative to the second image. The first image is the x-th frame before the image displayed at the first display time or a preset reference image, and the second image is the x-th frame before the image displayed at the second display time or a preset reference image, where x is a natural number greater than or equal to 1. When both the first display time and the second display time display static images, a first notification is sent to the compensator. If either the first display time or the second display time displays a non-static image, a second notification is sent to the compensator.

15. The display panel according to claim 14, wherein, The compensator compensates the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen, including: the compensator compensates the currently displayed screen based on the detection result of the detection compensation circuit during the blank time between the first display time and the second display time.

16. A display device, comprising: The display panel as described in any one of claims 1 to 15.

17. A display panel method, the display panel comprising a plurality of pixel units, at least one pixel unit comprising a plurality of sub-pixels, at least one sub-pixel comprising a pixel driving circuit, a detection compensation circuit, and a driven element, the display panel further comprising: The detection unit and compensator, the display method includes: The detection unit detects whether the currently displayed screen is a static screen. When the currently displayed screen is a static screen, it sends a first notification to the compensator; when the currently displayed screen is a non-static screen, it sends a second notification to the compensator. When the compensator receives the first notification, the compensator compensates the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen. When the compensator receives the second notification, the compensator does not compensate the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen.

18. The display method according to claim 17, wherein, The compensator does not compensate the currently displayed screen based on the detection result of the detection compensation circuit during the blank time of the currently displayed screen, including any one of the following: The detection and compensation circuit detects the electrical characteristics of the driven element during the blank time of the currently displayed screen, and the compensator does not compensate for the currently displayed screen. Alternatively, the detection and compensation circuit detects the electrical characteristics of the driven element during the blank time of the currently displayed screen, and the compensator compensates the currently displayed screen according to the first detection result, wherein the first detection result is the detection result of the detection and compensation circuit during the non-blank time before the currently displayed screen. Alternatively, the detection and compensation circuit does not detect the electrical characteristics of the driven element during the blank time of the currently displayed screen, and the compensator does not compensate for the currently displayed screen. Alternatively, the detection and compensation circuit may not detect the electrical characteristics of the driven element during the blank time of the currently displayed screen, and the compensator may compensate the currently displayed screen based on the first detection result.

19. The display method according to claim 17, wherein, The detection unit detects whether the currently displayed screen is a static screen, including any one of the following: The system detects whether there is a difference between the data of the currently displayed screen and the data of the first screen, or detects whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value. The first screen is the x-th frame before the currently displayed screen or a preset reference screen, where x is a natural number greater than or equal to 1. Alternatively, within a preset display area, it can be detected whether there is a difference between the data of the currently displayed screen and the data of the first screen, or within a preset display area, it can be detected whether the difference between the data of the currently displayed screen and the data of the first screen is less than a preset value; Alternatively, for a sub-pixel of a preset color, detect whether there is a difference between the data of the currently displayed image and the data of the first image, or for a sub-pixel of a preset color, detect whether the difference between the data of the currently displayed image and the data of the first image is less than a preset value.

20. The display method according to claim 17, wherein, The detection unit detects whether the currently displayed screen is a static screen. When the currently displayed screen is a static screen, it sends a first notification to the compensator; when the currently displayed screen is a non-static screen, it sends a second notification to the compensator, including: The detection unit detects whether the image displayed at the first display time is a static image relative to the first image, and whether the image displayed at the second display time is a static image relative to the second image. The first image is the x-th frame before the image displayed at the first display time or a preset reference image, and the second image is the x-th frame before the image displayed at the second display time or a preset reference image, where x is a natural number greater than or equal to 1. When both the first display time and the second display time display static images, the detection unit sends a first notification to the compensator; When either the first display time or the second display time displays a non-static image, the detection unit sends a second notification to the compensator.

Images