Display control circuit, display panel, and display device

Abstract

The application discloses a display control circuit, a display panel and a display device. The display control circuit comprises a control unit and a plurality of cascaded scan driving circuits corresponding to each subarea; the scan driving circuits corresponding to N subareas are independent of each other; the control unit is configured to output a frame start signal and a clock signal to the scan driving circuit corresponding to the lighted subarea, and stop outputting the frame start signal and the clock signal to the scan driving circuit corresponding to the non-lighted subarea; or, the scan driving circuits corresponding to the N subareas are sequentially cascaded; the control unit is configured to output the frame start signal to the scan driving circuit corresponding to the target subarea through one port of an N-way selector, output the clock signal to the scan driving circuit corresponding to the target subarea and the lighted subarea after the target subarea, and stop outputting the clock signal to the non-lighted subarea after the target subarea. The circuit can reduce the power consumption of the display screen.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display control circuit, a display panel and a display device. BACKGROUND

[0002] With the demand of portability of display devices and the demand of increasing size of display panels, display devices with foldable screens appear, such as double-folded screen from top to bottom, double-folded screen from left to right, three-folded screen and the like.

[0003] When the display device displays, a row of pixel units is driven by a scan driving circuit (Gate Driver On Array, GOA) to display. For the foldable screen device, when the foldable screen device is in a folded use state, the display screen has a non-display area, i.e. a region where pixels are not lit.

[0004] At present, for the non-display area of the foldable screen, the non-display area is usually controlled to display black to show a non-display state, or the output of the GOA of the non-display area is directly controlled to control the pixel units not to emit light. However, in the above control mode, the scan driving circuit corresponding to the non-display area is still in operation, resulting in high power consumption of the display screen. SUMMARY

[0005] In view of the above defects or deficiencies in the prior art, it is desirable to provide a display control circuit, a display panel and a display device, which can reduce the power consumption of the display screen.

[0006] In a first aspect, the present application provides a display control circuit. The display control circuit is applied to a display screen with N partitions, and includes a control unit and a plurality of cascaded scan driving circuits corresponding to each partition. The scan driving circuits corresponding to the N partitions are respectively connected with N groups of signal terminals of the control unit, and the scan driving circuits corresponding to the N partitions are independent of each other. The control unit is configured to output a frame start signal and a clock signal to the scan driving circuit corresponding to the lit partition, and stop outputting the frame start signal and the clock signal to the scan driving circuit corresponding to the non-lit partition. Alternatively, one group of signal terminals of the control unit is connected with the scan driving circuit corresponding to a target partition in the N partitions through one port of an N-way selector, and the scan driving circuits corresponding to the N partitions are cascaded in turn. The control unit is configured to output the frame start signal to the scan driving circuit corresponding to the target partition through one port of the N-way selector, output the clock signal to the scan driving circuit corresponding to the target partition and the lit partition after the target partition, and stop outputting the clock signal to the non-lit partition after the target partition.

[0007] With reference to the first aspect, in a possible implementation manner, the N scanning driving circuits corresponding to the N sub-regions are connected with N groups of signal terminals of the control unit, and in the case that the lighted sub-region comprises a plurality of sub-regions, the control unit is configured to determine a time delay corresponding to each lighted sub-region relative to a previous lighted sub-region, and sequentially output a frame start signal and a clock signal to the scanning driving circuit corresponding to each lighted sub-region according to the time delay corresponding to each lighted sub-region; the time delay corresponding to the lighted sub-region is related to the number of rows of pixel units of the previous lighted sub-region of the lighted sub-region.

[0008] With reference to the first aspect, in a possible implementation manner, in the case that the target sub-region is a non-starting sub-region, the sub-region before the target sub-region is in a non-lighted state.

[0009] With reference to the first aspect, in a possible implementation manner, in the case that the N scanning driving circuits corresponding to the N sub-regions are connected with N groups of signal terminals of the control unit, the refresh rate corresponding to each lighted sub-region is different.

[0010] With reference to the first aspect, in a possible implementation manner, the scanning driving circuit comprises a gate driving unit, and the control unit is configured to reduce the frequency of the frame start signal of the gate driving unit corresponding to the lighted sub-region, so as to reduce the refresh rate of the lighted sub-region.

[0011] With reference to the first aspect, in a possible implementation manner, the scanning driving circuit comprises a light emitting control unit, in the case that the N scanning driving circuits corresponding to the N sub-regions are connected with N groups of signal terminals of the control unit, a target group of signal terminals in the N groups of signal terminals comprises a target signal terminal corresponding to the light emitting control unit of the scanning driving circuit, the light emitting control unit in the scanning driving circuit corresponding to different sub-regions is connected with the target signal terminal of the control unit, the frame start signal corresponding to the light emitting control unit is a periodic signal, and the number of periods of the frame start signal corresponding to the light emitting control unit within a frame is related to the time delay corresponding to the lighted sub-region.

[0012] With reference to the first aspect, in a possible implementation manner, the number of periods of the frame start signal corresponding to the light emitting control unit within a frame is an integer multiple of a proportional parameter corresponding to the time delay; the proportional parameter is a quotient value of the time of a frame and the time delay.

[0013] With reference to the first aspect, in a possible implementation manner, the N selectors comprise N switches, the control terminals of the switches are connected with the enable terminals of the control unit, the input terminals of the switches are connected with the signal terminals of the control unit, and the output terminals of the switches are respectively connected with the input terminals of the scanning driving circuit corresponding to the starting row pixels of each sub-region.

[0014] With reference to the first aspect, in a possible implementation manner, the control unit is further configured to adjust the voltage of the data signal of the lighted sub-region according to the size of the lighted sub-region; the voltage of the data signal is negatively related to the size of the lighted sub-region.

[0015] In a second aspect, the present application provides a display panel comprising the display control circuit of the first aspect and any one of the first aspect.

[0016] In a third aspect, the present application provides a display device comprising the display panel of the second aspect.

[0017] The display control circuit, the display panel and the display device provided by the embodiments of the present application are described below in detail. BRIEF DESCRIPTION OF DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof, read in conjunction with the accompanying drawings:

[0019] Figure 1 FIG. 8 is a signal timing diagram corresponding to the 8T1C pixel circuit;

[0020] Figure 2 FIG. 9 is a structural schematic diagram of the 8T1C pixel circuit;

[0021] Figure 3 FIG. 10 is a structural schematic diagram of the display control circuit in an embodiment;

[0022] Figure 4 FIG. 11 is a structural schematic diagram of the scan driving circuit in an embodiment;

[0023] Figure 5 Connection diagram of scan driving circuit and control unit corresponding to one partition in one embodiment;

[0024] Figure 6 Arrangement diagram of pixel units in one embodiment;

[0025] Figure 7 Another signal timing diagram corresponding to scan driving circuit in one embodiment;

[0026] Figure 8 Another signal timing diagram corresponding to scan driving circuit in one embodiment;

[0027] Figure 9 Another signal timing diagram corresponding to scan driving circuit in one embodiment;

[0028] Figure 10 Another signal timing diagram corresponding to scan driving circuit in one embodiment;

[0029] Figure 11 Another structure diagram of display control circuit in one embodiment;

[0030] Figure 12 Partition diagram of display screen in one embodiment;

[0031] Figure 13 Another signal timing diagram corresponding to scan driving circuit in one embodiment;

[0032] Figure 14 Another signal timing diagram corresponding to scan driving circuit in one embodiment;

[0033] Figure 15 Another signal timing diagram corresponding to scan driving circuit in one embodiment;

[0034] Figure 16 Structure diagram of N-way selector in one embodiment;

[0035] Figure 17 Another signal timing diagram corresponding to scan driving circuit in one embodiment;

[0036] Figure 18 Another structure diagram of display control circuit in one embodiment;

[0037] Figure 19 Brightness compensation diagram of display control circuit in one embodiment. DETAILED DESCRIPTION

[0038] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0039] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. In addition, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The terms "first" and "second" in the description and claims of the embodiments of this application are used to distinguish different objects, rather than to describe a specific order of objects.

[0040] With the increasing demand for portability of display devices and the increase in the size of display panels, display devices with foldable screens have emerged, such as double-folding screens up and down, double-folding screens left and right, and triple-folding screens. When the display device is displaying, a row of pixel units is driven by a scanning driver circuit (Gate Driver On Array, GOA) to display. The GOA circuit includes reset units P-Reset and H-Reset, gate driver units Gate-N and Gate-P, and a light-emitting control unit EM, which are respectively used to provide reset signals, gate drive signals, and light-emitting control signals to the pixel circuit to control the signal reset, data writing, and light-emitting time of the pixel circuit. For example, the output signals of each unit of the GOA circuit can be as follows: Figure 1 The timing control shown is as follows Figure 2 The 8T1C pixel circuit shown in the figure. Among them, Vsync is the vertical synchronization signal, V data is the data voltage, V init1 、V init2 and V init3 are the reset voltages of the pixel circuits respectively.

[0041] For foldable screen devices, when the device is folded and in use, there are non-display areas on the display screen, that is, areas where the pixels are not lit. Currently, the non-display areas of foldable screens are often controlled to appear black to indicate a non-display state, or the output of the GOA in the non-display area is directly controlled to prevent the pixel units from emitting light. However, under the above control method, the scan drive circuit corresponding to the non-display area is still in operation, resulting in higher energy consumption of the display screen.

[0042] In one embodiment, Figure 3As shown, a display control circuit is provided for a display screen having N partitions. The display control circuit includes a control unit 10 and a plurality of cascaded scan drive circuits 20 corresponding to each partition. The scan drive circuits 20 corresponding to the N partitions are respectively connected to N groups of signal terminals of the control unit 10. The scan drive circuits corresponding to the N partitions are independent of each other. The control unit 10 is configured to output a frame start signal and a clock signal to the scan drive circuit 20 corresponding to the illuminated partition, and to stop outputting the frame start signal and clock signal to the scan drive circuit 20 corresponding to the unilluminated partition. Alternatively, a group of signal terminals of the control unit 10 is connected to the scan drive circuit 20 corresponding to a target partition among the N partitions via a port of an N-way selector 30. The scan drive circuits 20 corresponding to the N partitions are sequentially cascaded. The control unit 10 is configured to output a frame start signal to the scan drive circuit 20 corresponding to the target partition via a port of the N-way selector 30, output a clock signal to the scan drive circuit 20 corresponding to the target partition and the illuminated partitions following the target partition, and stop outputting the clock signal to the unilluminated partitions following the target partition.

[0043] In an embodiment of the present application, a display control circuit is provided, which includes a control unit 10 and a plurality of cascaded scan driving circuits 20 corresponding to each partition. The control unit may be a display driver integrated circuit (DDIC).

[0044] like Figure 3 As shown, the scanning driving circuits corresponding to each partition are independent of each other and have no electrical connection relationship. The dotted box in the figure is a plurality of cascaded scanning driving circuits 20 corresponding to one partition. Figure 4 As shown, a scan drive circuit 20 includes five units, namely, reset units P-Reset and H-Reset (i.e., RP and RH in the figure), gate drive units Gate-N and Gate-P (i.e., GN and GP in the figure), and light-emitting control unit EM. For the scan drive circuit 20 corresponding to the starting row of pixel units in a partition, the control unit 10 needs to provide a frame start signal (Start Vertical, STV) to each of the five units of the scan drive circuit 20, so as to drive the pixel units of each row of the partition for display through the cascaded scan drive circuit. Among them, ROW_1 is the starting row of pixel units in a partition, and ROW_2 is the second row of pixel units in the partition.

[0045] Since the scan driving circuits 20 corresponding to the partitions are independent of each other, that is, the frame start signal corresponding to the partition that is lit in front will not be transmitted to the partition that is lit behind through the cascaded scan driving circuits 20, the scan driving circuit 20 corresponding to each partition needs to be connected to different groups of signal terminals of the control unit 10, so that the control unit 10 can realize independent control of different partitions. As shown in Figure 5 , a connection mode of the scan driving circuit 20 corresponding to one partition and the control unit 10 is provided, that is, the scan driving circuit 20 corresponding to the starting row pixel unit of one partition is connected to one group of signal terminals of the control unit 10. The scan driving circuits 20 corresponding to N partitions are respectively connected to N groups of signal terminals of the control unit 10. One group of signal terminals includes five signal terminals, which are used to respectively provide a PSTV signal, an HSTV signal, a GSTV signal, an NSTV signal, and an ESTV signal. Among them, the PSTV signal is a frame start signal corresponding to the P-Reset unit, the HSTV signal is a frame start signal corresponding to the H-Reset unit, the GSTV signal is a frame start signal corresponding to the Gate-P unit, the NSTV signal is a frame start signal corresponding to the Gate-N unit, and the ESTV signal is a frame start signal corresponding to the EM unit.

[0046] It can be understood that a row of pixel units refers to a plurality of pixel units arranged in the same direction as the extension direction of the control unit. The starting row pixel unit of one partition is the pixel unit in the first row of the partition that displays in the display mode of row scanning driving, and specifically refers to the row of pixel units in the partition that is farthest from the control unit. The starting partition of the display screen is the first partition that displays, and specifically refers to the partition that is farthest from the control unit among the plurality of partitions of the display screen. For example, as shown in Figure 6 , if the display screen includes two partitions, which are the first partition (that is, the A region in the figure) and the second partition (that is, the B region in the figure), and the control unit is arranged on one side of the B region, then the plurality of pixel units connected by a line in the figure is a row of pixel units, the starting partition of the display screen is the first partition, the starting row pixel unit of the first partition is a1 in the figure, and the starting row pixel unit of the second partition is b1 in the figure. In a possible implementation, the display screen can be driven by a single-side GOA or a double-side GOA as shown in the figure, and the present application does not limit this.

[0047] In the above circuit connection mode, the control unit 10 is configured to output frame start signals and clock signals to the scan driving circuit 20 corresponding to the partition that is lit, and stop outputting frame start signals and clock signals to the scan driving circuit 20 corresponding to the partition that is not lit. The following describes the operation of the control unit 10 in the case of Figure 6Taking the display screen shown in the figure as an example, the first sub-area is driven by the first frame start signal STV1 (including PSTV1, HSTV1, GSTV1, NSTV1, and ESTV1) and the clock signal CK / CB (including PCK / PCB, HCK / HCB, GCK / GCB, NCK / NCB, and ECK / ECB), and the second sub-area is driven by the second frame start signal STV2 (including PSTV2, HSTV2, GSTV2, NSTV2, and ESTV2) and the clock signal CK / CB (including PCK / PCB, HCK / HCB, GCK / GCB, NCK / NCB, and ECK / ECB). It will be understood that different units in a scan driver circuit have different clock signals, and different scan driver circuits or scan driver circuits in different sub-areas can be driven by the same clock signal. Therefore, the above description does not distinguish between the clock signals of the first and second sub-areas.

[0048] like Figure 7 As shown, when the first partition is displayed alone, the first partition is a lit partition and the second partition is a non-lit partition. The control unit 10 is used to output STV1 to the scan drive circuit corresponding to the starting row pixel unit of the first partition, and output the clock signal CK / CB to all the scan drive circuits corresponding to the first partition, so as to drive the scan drive circuit corresponding to the first partition to operate through STV1 and CK / CB, thereby lighting up the pixel units of the first partition row by row; at the same time, stop outputting STV2 to the scan drive circuit corresponding to the starting row pixel unit of the second partition, stop outputting the clock signal CK / CB to all the scan drive circuits corresponding to the second partition, avoid the scan drive circuit corresponding to the second partition from operating, and avoid lighting up the pixel units of the second partition. It should be noted that stopping outputting STV2 to the scan drive circuit corresponding to the starting row pixel unit of the second partition can specifically be outputting a constant voltage signal to the scan drive circuit corresponding to the starting row pixel unit of the second partition; similarly, stopping outputting the clock signal to all the scan drive circuits corresponding to the second partition can specifically be outputting a constant voltage signal to all the scan drive circuits corresponding to the second partition, so as to maintain the critical display state of the pixel units of the second partition.

[0049] like Figure 8As shown, in the case of displaying the second partition alone, the second partition is the lighting partition, and the first partition is the non-lighting partition. The control unit 10 is configured to output the STV2 to the scanning driving circuit corresponding to the starting row pixel unit of the second partition, output the clock signal CK / CB to all scanning driving circuits corresponding to the second partition, drive the scanning driving circuits corresponding to the second partition to operate through the STV2 and the CK / CB, and then light the pixel units of the second partition row by row; at the same time, stop outputting the STV1 to the scanning driving circuit corresponding to the starting row pixel unit of the first partition, stop outputting the clock signal CK / CB to all scanning driving circuits corresponding to the first partition, avoid the operation of the scanning driving circuits corresponding to the first partition, and avoid lighting the pixel units of the first partition. It should be noted that stopping outputting the STV1 to the scanning driving circuit corresponding to the starting row pixel unit of the first partition can specifically be outputting a constant voltage signal to the scanning driving circuit corresponding to the starting row pixel unit of the first partition; similarly, stopping outputting the clock signal to all scanning driving circuits corresponding to the first partition can also be outputting a constant voltage signal to all scanning driving circuits corresponding to the first partition, so as to maintain the critical display state of the pixel units of the first partition.

[0050] As shown in FIG. 1, the display screen 100 includes a control unit 10, a scanning driving circuit 20, and a pixel unit 30. The control unit 10 is connected to the scanning driving circuit 20 through N groups of signal terminals, and the scanning driving circuit 20 is connected to the pixel unit 30 through M groups of signal terminals. The pixel unit 30 is divided into N partitions, and each partition includes a plurality of pixel units. Figure 9 As shown, in the case of full-screen display of the display screen, the first partition and the second partition are both lighting partitions, the control unit 10 is configured to output the STV1 and the STV2 to the scanning driving circuit corresponding to the starting row pixel unit of the first partition and the scanning driving circuit corresponding to the starting row pixel unit of the second partition respectively, and output the clock signal CK / CB to all scanning driving circuits of the display screen, so as to drive all scanning driving circuits of the display screen to operate and light all pixel units of the display screen.

[0051] In a possible implementation, in the case that the scanning driving circuits corresponding to the N partitions are connected to the N groups of signal terminals of the control unit, and the lighting partitions include a plurality of partitions, in order to ensure the continuity of the display between the plurality of lighting partitions, the control unit 10 is configured to determine the time delay of each lighting partition relative to the previous lighting partition, and output the frame start signal and the clock signal to the scanning driving circuits corresponding to the lighting partitions in turn according to the time delay corresponding to each lighting partition.

[0052] In the embodiment of the present application, for each lighting partition, it needs to be displayed with a time delay relative to the previous lighting partition, that is, after the previous lighting partition is lighted row by row from the starting row pixel unit to the last row pixel unit, the first row pixel unit of the lighting partition is lighted. The previous lighting partition is the partition displayed before the lighting partition.

[0053] It can be understood that the time delay of the lighting partition relative to the previous lighting partition is the lighting time of the previous lighting partition. In the line scanning driving mode, the lighting time of a partition is related to the number of rows of pixel units of the partition in the case of a determined line scanning period. That is, the time delay corresponding to the lighting partition is related to the number of rows of pixel units of the previous lighting partition of the lighting partition. Specifically, the time delay corresponding to the lighting partition is the product of the number of rows of pixel units of the previous lighting partition and the line scanning period.

[0054] The display screen shown in the following Figure 6 is taken as an example for description. In the case of full-screen display, the first partition is the previous lighting partition of the second partition, and the time delay corresponding to the second partition is the lighting time of the first partition. In the actual driving process, as shown in the following Figure 10 , the control unit 10 first outputs a first frame start signal STV1 to the scanning driving circuit corresponding to the starting row pixel unit of the first partition, so as to sequentially light each row of pixel units of the first partition through the cascaded scanning driving circuit corresponding to the first partition. Then, after the lighting of the first partition is completed, a second frame start signal STV2 is output to the scanning driving circuit corresponding to the second partition, so as to sequentially light each row of pixel units of the second partition through the cascaded scanning driving circuit corresponding to the second partition, and finally complete the continuous lighting of the display screen in the case of full-screen display.

[0055] In a possible implementation manner, Figure 6 , the display screen shown in the following may be a three-fold display screen. At this time, the size of the first partition is 1 / 3 of the full-screen size, and the size of the second partition is 2 / 3 of the full-screen size. Therefore, the lighting time of the first partition is 1 / 3 of the time of one frame of the display screen. Therefore, in this case, the time delay corresponding to the second partition can be 1 / 3 of the time of one frame of the display screen. That is, the control unit 10 drives the second partition to display after an interval of 1 / 3 of the time of one frame.

[0056] The above embodiments illustrate the manner of independent control of the control unit on each partition, that is, the specific control manner of the control unit 10 in the case that the scanning driving circuits corresponding to each partition are independent of each other and the scanning driving circuits corresponding to each partition are driven by different group signal terminals of the control unit. In this control manner, for the lighting partition, the frame start signal and the clock signal output to the scanning driving circuit corresponding to the non-lighting partition can be stopped, so as to avoid the operation of the scanning driving circuit corresponding to the non-lighting partition, thereby achieving the effect of saving the power consumption of the display screen.

[0057] In an embodiment, as shown in the following Figure 11As shown, the display control circuit can further include an N-way selector 30, and the N partition scanning drive circuits 20 corresponding to the N partitions of the display screen can be cascaded in sequence. The control unit 10 can realize display control of the N partitions through a group of signal terminals and the N-way selector 30, i.e., the group of signal terminals of the control unit 10 is connected to the scanning drive circuit 20 corresponding to the target partition in the N partitions through a port of the N-way selector 30. In this circuit connection mode, the control unit 10 is configured to output a frame start signal to the scanning drive circuit 20 corresponding to the target partition through a port of the N-way selector 30, output a clock signal to the scanning drive circuit 20 corresponding to the target partition and the lighted partitions after the target partition, and stop outputting the clock signal to the non-lighted partitions after the target partition.

[0058] As shown, the target partition is the first lighted partition in all the lighted partitions of the display screen. For example, as shown in Figure 12 As shown, if the display screen includes a first partition, a second partition, a third partition, a fourth partition, and a fifth partition in sequence according to the driving order (the arrow direction in the figure). In some cases, the second partition, the fourth partition, and the fifth partition of the display screen need to be lighted, and the target partition is the second partition. The lighted partitions after the target partition are the fourth partition and the fifth partition, and the non-lighted partitions after the target partition are the third partition. It can be understood that, in the case where the target partition is a non-starting partition, the partitions before the target partition are in a non-lighted state, such as the first partition in the figure. In the case where the lighted partitions include a starting partition, the lighted partition is the starting partition.

[0059] In the actual driving control process, the control unit 10 is configured to output a frame start signal to the scanning drive circuit 20 corresponding to the target partition through a port of the N-way selector 30. The frame start signal can be transmitted through the scanning drive circuits cascaded in the partition and the scanning drive circuits cascaded between the partitions to sequentially drive the pixel units of the target partition and the partitions after the target partition to display. Meanwhile, the control unit 10 also needs to output a clock signal to the target partition and the lighted partitions after the target partition to enable the pixel units of the target partition and the lighted partitions after the target partition to normally light up under the driving of the frame start signal and the clock signal. Since the scanning drive circuits corresponding to the partitions are in a cascaded relationship, the frame start signal output to the target partition will be transmitted to the non-lighted partitions. In order to avoid display of the non-lighted partitions after the target partition, the control unit 10 can stop outputting the clock signal to the non-lighted partitions after the target partition to avoid operation of the driving control circuit corresponding to the non-lighted partitions after the target partition, thereby avoiding display of the non-lighted partitions.

[0060] The following is described by taking the display screen as shown in Figure 6 As shown, the target partition is the first lighted partition in all the lighted partitions of the display screen. For example, as shown in Figure 13As shown, when the first partition is displayed alone, the first partition is the target partition, and the second partition is the non-lit partition following the target partition. The control unit 10 outputs the first frame start signal STV1 and the clock signal to the first partition through the N-way selector 30, and stops outputting the clock signal to the second partition. Even if the first frame start signal STV1 is transmitted to the scan drive circuit corresponding to the second partition through the cascaded scan drive circuit, because the control unit 10 does not output the clock signal to the second partition, the scan drive circuit corresponding to the second partition will not operate, and the pixel units in the second partition will not light up.

[0061] like Figure 14 As shown, when the second partition is displayed alone, the second partition is the target partition and the first partition is in a non-lit state. The control unit 10 outputs the second frame start signal STV2 and the clock signal to the second partition through the N-way selector.

[0062] like Figure 15 As shown, when the display screen is in full screen mode, the first partition is the target partition, and the second partition is the illuminated partition after the target partition. The control unit 10 outputs the first frame start signal STV1 to the first partition through the N-way selector 30, and outputs the clock signal to the scan drive circuits corresponding to the first and second partitions. In this case, the first frame start signal STV1 can be transmitted to the scan drive circuit corresponding to the second partition through the cascaded scan drive circuits, so that the scan drive circuit corresponding to the second partition operates under the drive of the clock signal and the output signal of the last cascaded scan drive circuit of the first partition, thereby illuminating the pixel units of the second partition.

[0063] It should be noted that stopping outputting the clock signal to the scan driving circuit corresponding to the non-lit partition after the target partition may specifically be outputting a constant voltage signal to the scan driving circuit corresponding to the non-lit partition after the target partition, for example Figure 13 A constant voltage signal of a medium-low level Low or a high level High is used to maintain the critical display state of the pixel unit in the non-lit partition.

[0064] In one possible implementation, an N-way selector includes N switches, with the control terminal of each switch connected to the enable terminal of the control unit, the input terminal of each switch connected to the signal terminal of the control unit, and the output terminal of each switch connected to the input terminal of the scan drive circuit corresponding to the starting row of pixels in each partition. The control unit 10 can send different enable signals via the enable terminal to activate different switches, thereby activating the path between the signal terminal and the scan drive circuit corresponding to the starting row of pixels in the partition corresponding to the switch, outputting a frame start signal to the partition, and illuminating the partition. The switches can be thin film transistors (TFTs).

[0065] The following still takes the display screen shown in Figure 6 As an example, in the case where the display screen includes two partitions, the N-way selector is a two-way selector. As shown in Figure 16 The two-way selector can include a first transistor T11 and a second transistor T12, the control terminals of the first transistor T11 and the second transistor T12 are connected to the enable terminal of the control unit 10, for receiving the enable signal EN output by the control unit 10. The input terminals of the first transistor T11 and the second transistor T12 are connected to a group of signal terminals of the control unit, for receiving the first frame start signal or the second frame start signal (i.e. STV1 / 2) output by the control unit 10. The output terminal of the first transistor T11 is connected to the input terminal of the scan driving circuit corresponding to the starting row pixel unit of the first partition, for outputting the received first frame start signal STV1 to the scan driving circuit corresponding to the first partition in the case of being turned on; the output terminal of the second transistor T12 is connected to the input terminal of the scan driving circuit corresponding to the starting row pixel unit of the second partition, for outputting the received second frame start signal STV2 to the scan driving circuit corresponding to the second partition in the case of being turned on.

[0066] Among them, the first transistor T11 and the second transistor T12 are thin film transistors of different models. For example, the first transistor T11 is a P-type transistor, and the second transistor T12 is an N-type transistor.

[0067] In the case of displaying the first partition alone or displaying the full screen of the display screen, the control unit 10 outputs a first enable signal (which can be a low-level signal, for example) to the control terminals of the first transistor T11 and the second transistor T12 through the enable terminal, so as to turn on the first transistor T11, and turn on the path between the signal terminal of the control unit 10 and the scan driving circuit corresponding to the starting row pixel unit of the first partition, so as to output the first frame start signal STV1 to the scan driving circuit corresponding to the starting row pixel unit of the first partition.

[0068] In the case of displaying the second partition alone, the control unit 10 outputs a second enable signal (which can be a high-level signal, for example) to the control terminals of the first transistor T11 and the second transistor T12 through the enable terminal, so as to turn on the second transistor T12, and turn on the path between the signal terminal of the control unit 10 and the scan driving circuit corresponding to the starting row pixel unit of the second partition, so as to output the second frame start signal STV2 to the scan driving circuit corresponding to the starting row pixel unit of the second partition.

[0069] The display control circuit provided in the embodiments of the present application is applied to a display screen with N partitions, and the display control circuit comprises a control unit and a plurality of cascaded scan driving circuits corresponding to the partitions. The scan driving circuits corresponding to the N partitions are respectively connected with N groups of signal terminals of the control unit, and the scan driving circuits corresponding to the N partitions are independent of each other. The control unit is configured to output a frame start signal and a clock signal to the scan driving circuit corresponding to the lighted partition, and stop outputting the frame start signal and the clock signal to the scan driving circuit corresponding to the non-lighted partition. Alternatively, one port of an N-way selector is connected with the scan driving circuit corresponding to a target partition in the N partitions through one group of signal terminals of the control unit, and the scan driving circuits corresponding to the N partitions are cascaded in sequence. The control unit is configured to output the frame start signal to the scan driving circuit corresponding to the target partition through the one port of the N-way selector, output the clock signal to the scan driving circuit corresponding to the target partition and the lighted partition after the target partition, and stop outputting the clock signal to the non-lighted partition after the target partition. That is, the control unit in the present application realizes the display control of the display screen with N partitions by different control modes according to whether the scan driving circuits corresponding to the partitions are cascaded or not. In the display control process, the operation of the scan driving circuit corresponding to the non-lighted partition is avoided by stopping outputting the clock signal to the non-lighted partition or stopping outputting the frame start signal and the clock signal to the non-lighted partition, so that the power consumption of the display screen is saved.

[0070] In one embodiment, in the case that the scan driving circuits corresponding to the N partitions are connected with the N groups of signal terminals of the control unit, the refresh rates of the lighted partitions are different.

[0071] In the embodiments of the present application, the scan driving circuits corresponding to the N partitions are connected with the N groups of signal terminals of the control unit. In this case, the scan driving circuits corresponding to the N partitions are not cascaded, and the control unit 10 can realize the independent control of the partitions. Therefore, the control unit 10 can also realize the independent control of the refresh rates of the lighted partitions. That is, the refresh rates of the lighted partitions can be different.

[0072] For example, when the user uses a plurality of partitions in the N partitions of the display screen, the plurality of used partitions are the lighted partitions. In different application scenarios, the requirements of part of the lighted partitions on the refresh rate are not high, and therefore, the refresh rate of the part of the lighted partitions can be appropriately reduced to reduce the power consumption of the display screen.

[0073] In the specific implementation, the control of the refresh rate of the partition can be realized by the gate driving unit in the scan driving circuit. That is, the control unit is configured to reduce the frequency of the frame start signal of the gate driving unit corresponding to the lighted partition to reduce the refresh rate of the lighted partition.

[0074] In the specific implementation, the control of the refresh rate of the partition can be realized by the gate driving unit in the scan driving circuit. That is, the control unit is configured to reduce the frequency of the frame start signal of the gate driving unit corresponding to the lighted partition to reduce the refresh rate of the lighted partition. Figure 2The pixel circuit shown in the figure can be known that the gate drive signals Gate_P and Gate_N are the key signals for the pixel unit to light up, especially the Gate_N signal, which is Figure 2 The last signal required for the normal operation of the 8T1C pixel circuit shown in the figure. If there is an error in the gate drive signal, the pixel circuit cannot operate normally, and the pixel unit cannot light up. Therefore, the gate drive signals Gate_P and Gate_N are output by the gate drive unit in the driving circuit. Therefore, the control unit 10 can control the refresh rate of the light-up partition by controlling the frequency of the frame start signal of the gate drive unit in the scan driving circuit corresponding to the light-up partition, and the output frequency of the gate drive signal of the gate drive unit.

[0075] Therefore, in the case of reducing the refresh rate of the light-up partition, the control unit can reduce the refresh rate of the light-up partition by reducing the frequency of the frame start signal of the gate drive unit corresponding to the light-up partition. Taking the case of a display screen including a first partition and a second partition, and the second partition can reduce the refresh rate as an example. As shown in Figure 17 As shown, the frame start signal NSTV2 required by the gate drive signal unit of the scan driving circuit for the second partition, the control unit 10 can output only one frame start signal NSTV2 in two frames, so that the pixel circuit only receives one gate drive signal Gate_N in two frames, and the pixel unit only lights up once in two frames. The refresh rate of the second partition is reduced by one, for example, if the original refresh rate of the second partition is 120Hz, in the case that the control unit 10 only outputs one frame start signal NSTV2 in two frames, the refresh rate of the second partition becomes 60Hz.

[0076] In the circuit provided by the embodiment of the present application, in the case that the N partitions correspond to the scan driving circuit and the N groups of signal terminals of the control unit, the control unit can reduce the refresh rate of the light-up partition by reducing the frequency of the frame start signal of the gate drive unit corresponding to the light-up partition, so as to reduce the power consumption of the light-up partition, and further reduce the power consumption of the display screen.

[0077] In one embodiment, as shown in Figure 18 As shown, the scan driving circuit 20 includes a light-emitting control unit, in the case that the N partitions correspond to the scan driving circuit and the N groups of signal terminals of the control unit 10, the target group of signal terminals in the N groups of signal terminals includes the target signal terminal corresponding to the light-emitting control unit of the scan driving circuit 20, the light-emitting control units in the scan driving circuits corresponding to different partitions are connected to the target signal terminals of the control unit 10, and the frame start signal corresponding to the light-emitting control unit is a periodic signal. The number of periods of the frame start signal of the light-emitting control unit corresponding to the light-up partition in one frame is related to the time delay corresponding to the light-up partition.

[0078] In the embodiment of the present application, the scanning driving circuits corresponding to the N partitions are independent of each other and are respectively connected to the N groups of signal terminals of the control unit. Considering that the display screen has multiple lit partitions, each lit partition has a time delay relative to the previous lit partition, and Figure 10 As shown, the frame start signal ESTV corresponding to the light-emitting control unit EM in the scanning drive circuit 20 is a periodic signal. Therefore, by setting the number of periods of ESTV in a frame, the ESTV corresponding to the last lit partition can still coincide with the ESTV required for the current lit partition after a delay. That is, the last lit partition and the current lit partition can share one ESTV. As for the control unit 10, the control unit 10 can be connected to the light-emitting control unit in the scanning drive circuit corresponding to each partition through a signal terminal, and output ESTV to the light-emitting control unit in the scanning drive circuit corresponding to each lit partition, thereby reducing the occupancy of the signal terminal of the control unit 10. The control unit 10 reduces the control of one signal, which can also achieve the effect of reducing power consumption.

[0079] To ensure that the ESTV corresponding to the currently lit partition coincides with the ESTV corresponding to the previously lit partition, the number of cycles of the frame start signal corresponding to the lighting control unit within one frame is an integer multiple of the proportional parameter corresponding to the delay. The proportional parameter is the quotient of the frame time and the delay.

[0080] For example, a display screen with two partitions, where the first partition is one-third the size of the display screen (e.g., a tri-fold display), is used. The scan drive circuits corresponding to the two partitions are connected to two sets of signal terminals of the control unit 10. The first set of signal terminals is used to output the frame start signal (PSTV1, HSTV1, GSTV1, NSTV1, and ESTV) for the scan drive circuit corresponding to the first partition, and the second set of signal terminals is used to output the frame start signal (PSTV2, HSTV2, GSTV2, NSTV2, and ESTV) for the scan drive circuit corresponding to the second partition. The first set of signal terminals is the target signal terminal, and the terminal in the first set of signal terminals that outputs the frame start signal ESTV corresponding to the light-emitting control unit of the scan drive circuit 20 is the target signal terminal. This target signal terminal is connected to the light-emitting control units in both the scan drive circuits corresponding to the first and second partitions.

[0081] The frame start signal corresponding to the light emitting control unit is a periodic signal, in the case of displaying in the first partition and the second partition, the frame start signal corresponding to the second partition has a time delay relative to the frame start signal corresponding to the first partition, and the time delay is 1 / 3 of a frame time. Then the proportion parameter of the time delay corresponding to the second partition is 3, and the number of periods of the frame start signal ESTV of the light emitting control unit in a frame should be set to an integer multiple of 3. Under this setting, the ESTV is delayed by 1 / 3 frame, and the frame start signal ESTV required by the light emitting control unit corresponding to the second partition is consistent, which can also drive the light emitting control unit corresponding to the second partition to operate normally. It can be understood that in this case, the occupied pins of the control unit 10 are reduced from 10 to 9, and the control unit 10 reduces the control of one ESTV signal, which can reduce the power consumption of the display screen.

[0082] The circuit provided by the embodiment of the present application can set the number of periods of the frame start signal of the light emitting control unit in a frame, so that the set frame start signal can normally drive the light emitting control units corresponding to each partition of the display screen, so that the control unit can drive the light emitting control units of each partition through only one signal terminal, reduce the occupied pins of the light emitting control unit to the control unit, reduce the number of signals required to be output by the control unit, and reduce the power consumption of the display screen.

[0083] In one embodiment, the control unit 10 is further configured to adjust the voltage of the data signal of the lighted partition according to the size of the lighted partition.

[0084] In the embodiment of the present application, since the display screen is set in the full-screen display state during the preparation process, when the display screen is displayed in the partition, the number of lighted pixel units is reduced, that is, the optical pixel rate (OPR) of the display screen is reduced, the load of the display screen is reduced, which will cause the brightness of the display screen to increase, that is, there is a problem of brightness mutation in the lighted partition switching process of the display screen. Therefore, it is necessary to perform IR drop compensation (IRC) on the display screen to avoid the brightness mutation problem in the lighted partition switching process of the display screen. For example, as shown in Figure 19 If the display screen is not compensated for IR drop, the brightness will increase when the OPR of the display screen decreases.

[0085] In a specific implementation, the brightness of the lighted partition can be adjusted by adjusting the voltage (i.e., Vdata) of the data signal of the lighted partition, so that the brightness remains unchanged when the overall size of the lighted partition changes. For example, a corresponding relationship between different sizes of the lighted partition and the voltage of the data signal can be preset in advance. The size of the lighted partition can represent the OPR of the display screen. During the display process of the display screen, the control unit 10 can determine the voltage of the data signal by the current size of the lighted partition and the preset corresponding relationship.

[0086] The voltage of the data signal is negatively correlated with the size of the lighted partition. That is, when the size of the lighted partition decreases, the load of the display screen decreases, and the brightness of the display screen increases, the voltage of the data signal needs to be increased to reduce the brightness of the display screen.

[0087] In a possible implementation, a corresponding relationship between different partition combinations of the display screen and the voltage of the data signal can also be preset in advance. During the display process of the display screen, the control unit 10 can determine the voltage of the data signal by the preset corresponding relationship and the currently lighted partition, and output the data signal to the lighted partition according to the determined voltage of the data signal. For example, for a display screen having a first partition and a second partition, the data voltage when the first partition is displayed alone, the data voltage when the second partition is displayed alone, and the data voltage when the full screen is displayed can be preset, so that the brightness of the display screen remains unchanged when the lighted partition is switched based on the above settings.

[0088] The control unit in the circuit provided by the embodiments of the present application can adjust the voltage of the data signal of the lighted partition by the size of the lighted partition to maintain the brightness of the display screen, thereby avoiding the problem of brightness mutation.

[0089] In one embodiment, a display panel is provided, which includes the display control circuit described in the above embodiments. The display control circuit is applied to a display screen with N partitions, and includes a control unit 10 and a plurality of cascaded scan driving circuits 20 corresponding to the partitions. The scan driving circuits 20 corresponding to the N partitions are respectively connected with N groups of signal terminals of the control unit 10, and are independent of each other. The control unit 10 is configured to output a frame start signal and a clock signal to the scan driving circuit 20 corresponding to the lit partition, and stop outputting the frame start signal and the clock signal to the scan driving circuit 20 corresponding to the non-lit partition. Alternatively, one group of signal terminals of the control unit 10 is connected with the scan driving circuit 20 corresponding to a target partition in the N partitions through one port of an N-way selector 30, and the scan driving circuits 20 corresponding to the N partitions are cascaded in sequence. The control unit 10 is configured to output the frame start signal to the scan driving circuit 20 corresponding to the target partition through the one port of the N-way selector 30, output the clock signal to the scan driving circuit 20 corresponding to the target partition and the lit partitions after the target partition, and stop outputting the clock signal to the non-lit partitions after the target partition.

[0090] In the embodiments of the present application, the control unit controls the display of the display screen with N partitions by different control modes according to whether the scan driving circuits corresponding to the partitions are cascaded or not. In the display control process, the clock signal is stopped from being output to the non-lit partition, or the frame start signal and the clock signal are stopped from being output to the non-lit partition, so as to avoid the operation of the scan driving circuit corresponding to the non-lit partition, thereby saving the power consumption of the display screen, and further saving the power consumption of the display panel.

[0091] In one embodiment, a display device is provided, which includes the display panel in the above embodiments, and the display panel includes a display control circuit. The display control circuit is applied to a display screen with N partitions, and the display control circuit includes a control unit 10 and a plurality of cascaded scan driving circuits 20 corresponding to the partitions. The scan driving circuits 20 corresponding to the N partitions are connected with N groups of signal terminals of the control unit 10 respectively, and the scan driving circuits corresponding to the N partitions are independent of each other. The control unit 10 is configured to output a frame start signal and a clock signal to the scan driving circuit 20 corresponding to the lighted partition, and stop outputting the frame start signal and the clock signal to the scan driving circuit 20 corresponding to the non-lighted partition. Alternatively, one group of signal terminals of the control unit 10 is connected with the scan driving circuit 20 corresponding to a target partition in the N partitions through one port of an N-way selector 30, and the scan driving circuits 20 corresponding to the N partitions are cascaded in sequence. The control unit 10 is configured to output the frame start signal to the scan driving circuit 20 corresponding to the target partition through the one port of the N-way selector 30, output the clock signal to the scan driving circuit 20 corresponding to the target partition and the lighted partitions after the target partition, and stop outputting the clock signal to the non-lighted partitions after the target partition.

[0092] In the embodiments of the present application, the control unit controls the display of the display screen with N partitions by different control modes according to whether the scan driving circuits corresponding to the partitions are cascaded or not. In the display control process, the clock signal is stopped from being output to the non-lighted partitions, or the frame start signal and the clock signal are stopped from being output to the non-lighted partitions, so as to avoid the operation of the scan driving circuit corresponding to the non-lighted partitions, thereby saving the power consumption of the display screen, and further saving the power consumption of the display panel. Furthermore, the power consumption of the display device can be reduced.

[0093] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. It should be understood by those skilled in the art that the scope of the application disclosed in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A display control circuit, characterized in that: Applicable to a display screen with N partitions, the display control circuit includes a control unit and multiple cascaded scan drive circuits corresponding to each partition. The scan drive circuits corresponding to the N partitions are respectively connected to N groups of signal terminals of the control unit, and the scan drive circuits corresponding to the N partitions are independent of each other; the control unit is used to output a frame start signal and a clock signal to the scan drive circuit corresponding to the lit partition, and stop outputting the frame start signal and the clock signal to the scan drive circuit corresponding to the non-lit partition; Alternatively, a group of signal terminals of the control unit are connected to a scan driving circuit corresponding to a target partition among the N partitions through a port of an N-way selector, and the scan driving circuits corresponding to the N partitions are cascaded in sequence; The control unit is used to output a frame start signal to the scanning drive circuit corresponding to the target partition through a port of the N-way selector, output a clock signal to the scanning drive circuit corresponding to the target partition and the lit partition after the target partition, and stop outputting the clock signal to the non-lit partition after the target partition.

2. The circuit according to claim 1, characterized in that The scanning driving circuits corresponding to the N partitions are connected to the N groups of signal terminals of the control unit, and when the lighting partition includes multiple partitions, The control unit is used to determine the delay corresponding to each of the lit partitions relative to the previous lit partition, and output a frame start signal and a clock signal to the scanning drive circuit corresponding to each of the lit partitions in sequence according to the delay corresponding to each of the lit partitions; the delay corresponding to the lit partition is related to the number of rows of pixel units of the previous lit partition of the lit partition.

3. The circuit according to claim 1, wherein: In the case that the target partition is not the initial partition, the partitions before the target partition are in a non-lit state.

4. The circuit according to claim 1, wherein: When the scan driving circuits corresponding to the N partitions are connected to the N groups of signal terminals of the control unit, the refresh rates corresponding to the illuminated partitions are different.

5. The circuit according to claim 4, characterized in that The scanning driving circuit includes a gate driving unit, The control unit is configured to reduce the frequency of a frame start signal of a gate driving unit corresponding to the illuminated partition, so as to reduce a refresh rate of the illuminated partition.

6. The circuit according to claim 1, wherein: The scanning driving circuit includes a light emitting control unit. When the scanning driving circuits corresponding to the N partitions are connected to N groups of signal terminals of the control unit, a target group signal terminal in the N groups of signal terminals includes a target signal terminal corresponding to the light emitting control unit of the scanning driving circuit, and the light emitting control units in the scanning driving circuits corresponding to different partitions are connected to the target signal terminal of the control unit. The frame start signal corresponding to the light emitting control unit is a periodic signal, and the number of periods of the frame start signal of the light emitting control unit corresponding to the lighting partition within one frame is related to the time delay corresponding to the lighting partition.

7. The circuit according to claim 6, characterized in that The number of cycles of the frame start signal corresponding to the light emitting control unit within one frame is an integer multiple of the proportional parameter corresponding to the time delay; the proportional parameter is the quotient of the time of one frame and the time delay.

8. The circuit according to claim 1, wherein: The N-way selector includes N switches, the control end of each switch is connected to the enable end of the control unit, the input end of each switch is connected to the signal end of the control unit, and the output end of each switch is respectively connected to the input end of the scan drive circuit corresponding to the starting row pixel of each partition.

9. The circuit according to claim 1, wherein: The control unit is further configured to adjust the voltage of the data signal of the illuminated partition according to the size of the illuminated partition; the voltage of the data signal is negatively correlated with the size of the illuminated partition.

10. A display panel, characterized in that: The display panel includes the display control circuit according to any one of claims 1 to 9.

11. A display device, characterized in that: The display device includes the display panel according to claim 10.

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