Display driving circuit, control method thereof, and display panel

Abstract

The application relates to a display driving circuit, a control method thereof and a display panel. The display driving circuit is applied to a display panel, the display panel comprises a bending area and a non-bending area, and the display driving circuit comprises: a gate driving circuit comprising i-stage cascaded gate driving units, i >= 3; a detection circuit connected with output ends of a plurality of reference gate driving units respectively, wherein each reference gate driving unit is a gate driving unit selected in each non-bending area; and a control circuit connected with the detection circuit, used for determining a working mode of the display panel according to output signals of each reference gate driving unit, wherein different working modes correspond to different display areas. The display driving circuit can display complete content in a local area of the display panel, so that complete content can still be displayed after the GIP circuit in the bending area is damaged, and emergency use of the display product is ensured.

Description

TECHNICAL FIELD

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

[0002] The GIP (Gate in panel) circuit of the existing folding product is located on the left and right sides of the bending area of the folding product. In order to reduce the bending crease, regardless of the existing U-shaped or water drop-shaped hinge, the folding needs the hinge to be stored to form a cavity, and the unfolding needs the hinge to be lifted to be flat, and the bending area is in a movable state, so the protection capability is weak.

[0003] In addition, the left and right sides of the bending area also need to cope with the external force impact of the edge and the internal stress difference when bending. Therefore, the GIP circuit in this area is prone to damage, which will cause the product to have a whole screen or half screen different display (only the upper part of the scanning direction can display), and further cause the content to be unable to be displayed completely, thereby affecting the emergency use of the product. SUMMARY

[0004] Therefore, it is necessary to provide a display driving circuit, a control method thereof and a display panel capable of displaying complete content in an emergency in view of the above technical problems.

[0005] In a first aspect, the present application provides a display driving circuit applied to a display panel, the display panel comprising a bending area and a non-bending area, any two adjacent non-bending areas being provided with a bending area, and the display driving circuit comprising:

[0006] a gate driving circuit comprising i-stage cascaded gate driving units, i≥3;

[0007] a detection circuit connected with output ends of a plurality of reference gate driving units, wherein each reference gate driving unit is a gate driving unit selected in each non-bending area, and the output end of each reference gate driving unit is connected with a reference pixel circuit located in each non-bending area;

[0008] a control circuit connected with the detection circuit, configured to determine a working mode of the display panel according to output signals of the reference gate driving units, wherein different working modes correspond to different display areas.

[0009] In one of the embodiments, the display area comprises n bending areas and n+1 non-bending areas, n>1.

[0010] The detection circuit is connected with output ends of at least n+1 reference gate driving units.

[0011] In one of the embodiments, the control circuit is further configured to acquire position information of each of the reference gate driving units with abnormal output signals, and determine the operation mode of the display panel according to the position information.

[0012] In one of the embodiments, the control circuit is further configured to determine the operation mode of the display panel as a first emergency mode when the output signals of the reference gate driving units in the yth non-bending area are normal and the output signals of the reference gate driving units in the y+1th non-bending area are abnormal, wherein the display area corresponding to the first emergency mode is the continuous display area in the 1st non-bending area to the yth non-bending area, the number of display rows of the display panel is less than or equal to the number of stages of the highest-stage reference gate driving unit with normal output signals, and n>y>1.

[0013] In one of the embodiments, the gate driving circuit further comprises n switch units, and the control circuit is further connected to the control terminals of the switch units; wherein the switch units are connected to the cascaded lines of two adjacent gate driving units to control the downward transmission of the scanning signals, and the yth switch unit is located between two reference gate driving units adjacent to the yth bending area, and n>y>1.

[0014] The control circuit controls the on-off states of the switch units according to the output signals of the reference gate driving units.

[0015] In one of the embodiments, the first-stage gate driving unit is configured to receive a first-stage frame scanning start signal.

[0016] When n=1, the switch unit is located between the reference gate driving unit in the first non-bending area and the reference gate driving unit in the second non-bending area, and the reference gate driving unit in the second non-bending area is configured to receive a second-stage frame scanning start signal.

[0017] When n>1, the second to the n+1th non-bending areas are each provided with a first reference gate driving unit, and the second to the nth non-bending areas are each further provided with a second reference gate driving unit, and the first reference gate driving units in the second to the n+1th non-bending areas are respectively configured to correspondingly receive the second to the n+1th stage frame scanning start signals.

[0018] In one of the embodiments, in the normal mode, the first-stage frame scanning start signal is normally output, the remaining stage frame scanning start signals are interrupted, each of the switch units is turned on, and the number of display rows is kept as a preset normal number of rows.

[0019] In one of the embodiments, the control circuit is further configured to determine the working mode of the display panel as a second emergency mode when the output signal of the reference gate drive unit in the yth non-bending area is normal and the output signal of the reference gate drive unit in the y+1th non-bending area is abnormal, wherein in the second emergency mode, the first level and the y+1th level frame scanning start signals are normally output, the remaining level frame scanning start signals are interrupted, and the yth switch unit is turned off and the remaining switch units are turned on, the display area corresponding to the first emergency mode is a display area other than a failure display area, and the failure display area is a continuous display area between the two adjacent reference gate drive units in the yth non-bending area and the y+1th non-bending area, n≥y≥1.

[0020] In one of the embodiments, the control circuit is further configured to determine the working mode of the display panel as a third emergency mode when the output signal of the reference gate drive unit in the yth non-bending area is normal and the output signal of the reference gate drive unit in the y+1th non-bending area is abnormal, wherein in the third emergency mode, the y+1th level frame scanning start signal is normally output, the remaining level frame scanning start signals are interrupted, and the yth switch unit is turned off and the remaining switch units are turned on, the display area corresponding to the third emergency mode is a continuous display area in the y+1th non-bending area to the n+1th non-bending area, and the number of display rows of the display panel is less than or equal to the difference between i+1 and the number of the lowest level reference gate drive unit in the y+1th non-bending area, n≥y≥1.

[0021] In one of the embodiments, the control circuit is further configured to determine the working mode of the display panel as a fourth emergency mode when the output signal of the reference gate drive unit in the first non-bending area is abnormal, wherein in the fourth emergency mode, the second level frame scanning start signal is normally output, the remaining level frame scanning start signals are interrupted, the first switch unit is turned off and the remaining switch units are turned on, and the display area corresponding to the working mode of the display panel is a continuous display area in the second non-bending area to the n+1th non-bending area, and the number of display rows of the display panel is less than or equal to the difference between i+1 and the number of the lowest level reference gate drive unit in the second non-bending area.

[0022] In one of the embodiments, each level of the gate drive unit is configured to output a first scanning signal, a second scanning signal and a light-emitting control signal.

[0023] The detection circuit is configured to determine that the output signal of the reference gate drive unit is abnormal when at least one of the three signals output by the reference gate drive unit is missing.

[0024] In one of the embodiments, the detection circuit is further configured to, in a case where it is detected that the output signal of the reference gate driving unit in the yth non-bending area is normal, take the reference gate driving unit in the yth non-bending area as a standard gate driving unit, take the reference gate driving unit in the y+1th non-bending area as a to-be-detected gate driving unit, obtain a difference value between a level of the to-be-detected gate driving unit and a level of the standard gate driving unit, determine an interval scanning time according to the difference value, and in a case where the output signal of the standard gate driving unit reaches the interval scanning time and the three signals output by the to-be-detected gate driving unit are not received, determine that the output signal of the to-be-detected gate driving unit is abnormal.

[0025] In a second aspect, the present application provides a display panel, comprising the display driving circuit as described above, wherein the display panel has a display area and a non-display area, the display area is provided with a pixel circuit, and the non-display area is provided with the gate driving circuit.

[0026] In a third aspect, the present application provides a control method of a display driving circuit, applied to a display driving circuit of a display panel, the display panel comprising a bending area and a non-bending area, one bending area being arranged between any two adjacent non-bending areas, the display driving circuit comprising a gate driving circuit, the gate driving circuit comprising i levels of gate driving units, i≥3; the control method comprising:

[0027] obtaining output signals of multiple reference gate driving units, wherein each reference gate driving unit is a gate driving unit selected in each non-bending area, and the output end of each reference gate driving unit is connected to a reference pixel circuit located in each non-bending area;

[0028] determining a working mode of the display panel according to the output signals of the reference gate driving units, wherein different working modes correspond to different display areas.

[0029] The display driving circuit, the display panel and the control method of the display driving circuit described above are connected to the reference GIP units in each non-bending area through the detection circuit, so as to detect the output signals of the reference GIP units through the detection circuit. When the detection circuit detects that the output signals of the reference GIP units are abnormal, the control circuit can determine the working mode of the display panel according to the output signals of the reference gate driving units, display complete content in a local area of the display panel, and thus display complete content even if the GIP circuit in the bending area is damaged, thereby ensuring the emergency use of the display product. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 A planar schematic view of a foldable display device in the related art;

[0032] Figure 2 A structural schematic view of a display driving circuit in an embodiment of the present application;

[0033] Figure 3 A structural schematic view of a display driving circuit in another embodiment of the present application;

[0034] Figure 4 A position schematic view of a switch unit in an embodiment of the present application;

[0035] Figure 5 A structural schematic view of a display driving circuit in still another embodiment of the present application;

[0036] Figure 6 A flow schematic view of a control method of a display driving circuit in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application can be more thoroughly and completely understood.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing specific embodiments of the present application, and is not intended to limit the present application.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are only for the purpose of illustration.

[0040] Hereinafter, although terms such as "first", "second", and the like can be used to describe various components, the components are not limited by the above terms. The above terms are used only to distinguish one component from another. It will also be understood that the expression including a plural form is encompassed by the expression in a singular form unless the expression in the singular form has a clearly different meaning from the expression in the plural form in the context.

[0041] When an expression such as "at least one of... " is used to follow a list of elements (elements), the expression is intended to include any one of the elements in the list, or any combination of the elements in the list. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. The term "includes" or "comprises" or "has" and the like means the stated feature, integer, step, operation, component, part, or the like is present, but does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or the like.

[0042] Electronic or electric devices and / or any other related devices or components (e.g., a display device including a display panel and a display panel driver, wherein the display panel driver further includes a driving controller, a gate driver, a gamma reference voltage generator, a data driver, and an emission driver) according to embodiments of the present application concepts described herein can be implemented with any appropriate hardware, firmware (e.g., an application specific integrated circuit), software, or a combination of software, firmware, and hardware. For example, various components of these devices can be formed on one integrated circuit (IC) chip or on separate IC chips. In addition, various components of these devices can be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on one substrate. In addition, various components of these devices can be processes or threads running on one or more processors in one or more computing devices, executing computer program instructions to perform various functions described herein and interacting with other system components for the performance of the various functions described herein. The computer program instructions are stored in a memory that can use standard memory devices, such as random access memory (RAM) implemented in the computing device. The computer program instructions can also be stored in other non-transitory computer-readable media, such as, for example, CD-ROMs, flash drives, etc. Also, those skilled in the art will recognize that the functions of the various computing devices can be combined or integrated into a single computing device, or the functions of a particular computing device can be distributed across one or more other computing devices without departing from the spirit and scope of the exemplary embodiments of the present application concepts.

[0043] While exemplary embodiments of the display module and the display device including the display module have been specifically described herein, many modifications and variations will be apparent to those skilled in the art. Therefore, it will be understood that the display module and the display device including the display module, constructed according to the principles of this application, may be implemented in ways other than those specifically described herein. This application is also defined in the claims and their equivalents.

[0044] As described in the background section, existing folding products suffer from stress concentration and weak protection on the left and right sides of the bending area due to their limited product form. Therefore, the left and right sides of the bending area are easily damaged by external forces.

[0045] like Figure 1 As shown, Figure 1 This is a common form factor for existing foldable tablets. To facilitate folding, the screen is used horizontally but vertically (specifically, the orientation of the displayed content and the actual scanning direction of the screen are inconsistent, the display driver chip cannot be folded, and the folding axis must be parallel to the display driver chip). If viewed from the folding axis as the horizontal direction (illustration rotated 90°), the GIP signal and GIP unit of the screen are located on the left and right sides of the screen. Damage to the GIP circuit in this area will cause the product to display abnormally with the entire screen or half screen, resulting in incomplete content display and affecting the emergency use of the product.

[0046] In practical applications, the GIP circuit in the bending region 12 is composed of several TFTs and capacitors formed by multiple layers of metal, insulating, and semiconductor films. It is easily susceptible to failure due to stress, resulting in abnormal display of the lower half of the screen. Signals are output step by step from the first-level GIP unit. When the signal reaches the bending region 12, it cannot output a signal due to the failure of the GIP unit in the bending region 12, and subsequent GIP units cannot work properly.

[0047] For the reasons mentioned above, this application provides a display driving circuit for use in a display panel, such as... Figure 1 and Figure 2 As shown, the display panel includes a bent area 12 and a non-bent area 11, with a bent area 12 between two adjacent non-bent areas 11. The display driving circuit includes a GIP circuit 23, a detection circuit 21, and a control circuit 22.

[0048] GIP circuit 23 includes i-level cascaded GIP units (e.g. Figure 2 (GIP_1 to GIP_2200), i≥3.

[0049] The detection circuit 21 is connected to the output terminals of multiple reference GIP units, wherein each reference GIP unit is a GIP unit selected in each non-bending region 11, and the output terminal of each reference GIP unit is connected to the reference pixel circuit located in each non-bending region 11 respectively.

[0050] The control circuit 22 is connected with the detection circuit 21, and is configured to determine the working mode of the display panel according to the output signals of the reference GIP units, wherein different working modes correspond to different display areas.

[0051] The detection circuit 21 can detect whether the output signals of the reference GIP units are abnormal, and the control circuit 22 determines the working mode of the display panel according to the abnormality of the output signals of the reference GIP units.

[0052] The following describes that the display panel includes n bending areas 12 and n+1 non-bending areas 11, and the detection circuit is connected with the output ends of n+1 reference GIP units. Taking n equal to 1 as an example, as shown in Figure 1 and Figure 2 It can be understood that the first non-bending area 11 and the second non-bending area 11 are located on both sides of the first bending area 12. In the case that the GIP circuit 23 of the first bending area 12 is damaged to cause the GIP units in this area to fail, the GIP circuit of the first bending area 12 cannot output normal signals to the GIP units in the second non-bending area 11, thereby causing the second non-bending area 11 to display abnormally. According to the output signals of the reference GIP units, the working mode of the display panel is determined, and then the display area corresponding to the current situation is determined, so that the complete content is displayed in the local area of the display panel, and the emergency use of the display product is ensured. For example, the display rows can be adjusted to display only in the first non-bending area 11. Since the GIP units in the first non-bending area 11 will not be affected by the damage of the GIP circuit 23 of the first bending area 12, they can work normally, and therefore the complete content can be displayed in the first non-bending area 11.

[0053] The display driving circuit described above is connected with the reference GIP units in each non-bending area 11 through the detection circuit 21, so as to detect the output signals of the reference GIP units through the detection circuit 21. When the detection circuit 21 detects that the output signals of the reference GIP units are abnormal, the control circuit 22 can determine the working mode of the display panel according to the output signals of the reference GIP units, and display the complete content in the local area of the display panel, so that the complete content can still be displayed after the GIP circuit 23 of the bending area 12 is damaged, and the emergency use of the display product is ensured.

[0054] In one embodiment, the control circuit 22 is further configured to obtain the position information of the reference GIP units with abnormal and normal output signals, and determine the working mode of the display panel according to the position information.

[0055] The detection circuit 21 can detect whether the output signals of the reference GIP units are abnormal, and the control circuit 22 determines the working mode of the display panel according to the abnormality of the output signals of the reference GIP units. Figure 2 and Figure 3As shown, the display panel includes a GIP signal line and a clock signal line, the GIP signal line is used to transmit a frame scanning start signal, the clock signal line is used to transmit a clock signal, the GIP unit receives the frame scanning start signal and the clock signal, and outputs a first scanning signal Scan1, a second scanning signal Scan2 and an emission control signal EM.

[0056] As shown, the GIP circuit can be a first scanning circuit, a second scanning circuit or an emission control circuit, and correspondingly, each stage of GIP unit can include a first scanning circuit unit, a second scanning circuit unit or an emission control circuit unit, and the frame scanning start signal can be a first scanning start signal SIN1, a second scanning start signal SIN2 or an emission control start signal EIN1; the first scanning circuit is used to receive a first clock signal (Scan1_CLK1 and Scan1_CLK2) and the first scanning start signal SIN1, and output the first scanning signal Scan1; the second scanning circuit is used to receive a second clock signal (Scan2_CLK1 and Scan2_CLK2) and the second scanning start signal SIN2, and output the second scanning signal Scan2; and the emission control circuit is used to receive a third clock signal (ECK1 and ECK2) and the emission control start signal EIN1, and output the emission control signal EM. Figure 3 It can be understood that when the GIP circuit 23 in the bending area 12 is abnormal, the GIP unit in the last non-bending area 11 adjacent to the bending area 12 outputs a normal signal, the reference GIP unit in the non-bending area 11 outputs a normal signal, and the GIP unit in the next non-bending area 11 adjacent to the bending area 12 outputs an abnormal signal due to the inability to receive a complete first-stage frame scanning start signal, so the output signal of the reference GIP unit in the non-bending area 11 is abnormal. When the clock signal line and / or the GIP signal line are abnormal, the first-stage GIP unit cannot generate a normal output signal, all subsequent GIP units cannot receive a normal frame scanning driving signal, and the output signals of all GIP units are abnormal, so the output signals of the reference GIP units are abnormal. Based on this, the abnormal area of the GIP circuit 23 can be determined according to the position information of the reference GIP units whose output signals are abnormal, and then the corresponding working mode is adopted.

[0057] In applications, the detection circuit 21 can determine that the output signal of the reference GIP unit is abnormal when at least one of the three signals (Scan1, Scan2 and EM) output by the reference GIP unit is missing.

[0058]

[0059] ​The detection circuit 21 can also take the reference GIP unit in the yth non-bending area 11 as a standard GIP unit and the reference GIP unit in the y+1th non-bending area 11 as a to-be-detected GIP unit when the output signal of the reference GIP unit in the yth non-bending area 11 is normal, obtain a difference between the level of the to-be-detected GIP unit and the level of the standard GIP unit, determine an interval scanning time according to the difference, and determine that the output signal of the to-be-detected GIP unit is abnormal when the output signal of the standard GIP unit is received for the interval scanning time and the three signals output by the to-be-detected GIP unit are not received, where n≥y≥1.

[0060] For example, the detection circuit 21 detects that the output signal of the reference GIP unit in the first non-bending area 11 is normal, takes the reference GIP unit GIP_1000 (1000th GIP unit) in the first non-bending area 11 as a standard GIP unit, and takes the reference GIP unit GIP_1200 (1200th GIP unit) in the y+1th non-bending area 11 as a to-be-detected GIP unit. The difference between the level of the to-be-detected GIP unit and the level of the standard GIP unit is 200, the interval scanning time between the to-be-detected GIP unit and the standard GIP unit is 200 rows of scanning time, and the output signal of the to-be-detected GIP unit GIP_1200 is determined to be abnormal when the time after the output signal of the standard GIP unit is received reaches 200 rows of scanning time and the three signals output by the to-be-detected GIP unit GIP_1200 are not received.

[0061] Optionally, the control circuit 22 is further configured to determine that the working mode of the display panel is a first emergency mode when the output signal of the reference GIP unit in the yth non-bending area 11 is normal and the output signal of the reference GIP unit in the y+1th non-bending area 11 is abnormal, where the first emergency mode corresponds to a continuous display area in the first non-bending area 11 to the yth non-bending area 11, and the display panel has a display row number less than or equal to the level of the highest-level reference GIP unit with a normal output signal, where n≥y≥1.

[0062] For example, as shown in FIG. 1, the display panel 10 includes a first non-bending area 11, a second non-bending area 12, a third non-bending area 13, and a fourth non-bending area 14. Figure 1 and Figure 3As shown, n equals 1, i is 2200, the reference GIP unit in the first non-bend region 11 is the 1000th level GIP unit GIP_1000, and the reference GIP unit in the second non-bend region 11 is the 1200th level GIP unit GIP_1200. It can be understood that even with damage to the GIP circuit 23 in the first bend region 12, GIP_1000 can still output a signal normally (Scan1_1000, Scan2_1000, and EM_1000 are all normal), while GIP_ Since GIP_1200 did not fully receive the first-level frame scan start signal, it cannot function properly, and its output signal is abnormal (i.e., at least one of Scan1_1200 / Scan2_1200 / EM_1200 has no output or an abnormal output). Based on this, the highest-level reference GIP unit with a normal output signal is level 1000, and the complete content can be displayed in the display area before GIP_1000 within the first non-bend zone 11. Specifically, if the output signal of GIP_1000 is normal but the output signal of GIP_1200 is abnormal, the control circuit 22 can determine that the GIP circuit 23 in the first bend zone 12 is damaged, adjust the number of display lines to 1000, and reduce the effective number of clock signal cycles to 1000, thereby displaying the complete content in the display area of ​​lines 1-1000 (the display area between GIP_1 and GIP_1000).

[0063] In one embodiment, such as Figure 4 As shown, the GIP circuit 23 also includes n switching units T, and the control circuit 22 is connected to the control terminal of each switching unit T; wherein, the switching unit T is connected to the cascaded line of two adjacent GIP units to control the downward transmission of the scan signal. The y-th switching unit T is located between two reference GIP units adjacent to the y-th bend region 12, n≥y≥1, where... Figure 2 For example, Figure 2 In the circuit, there is only one bend region 12, and the first switching unit T is located between two reference GIP units (i.e., GIP_1000-GIP_1200) adjacent to the first bend region 12. The control circuit 22 controls the on / off state of the switching unit T according to the output signal of each reference GIP unit.

[0064] In this context, the switching unit T can be a switching transistor. The cascading circuit of two GIP units is the connection between the output of the previous GIP unit and the input of the current GIP unit, such as... Figure 4 As shown, taking GIP_1100 and GIP_1101 as examples, the cascaded line between GIP_1100 and GIP_1101 is the line from the output terminal of GIP_1100 to the input terminal of GIP_1101.

[0065] For example, n equals 1, i is 2200, the reference GIP unit in the first non-bending area 11 is the 1000th GIP unit GIP_1000, and the reference GIP unit in the second non-bending area 11 is the 1200th GIP unit GIP_1200. The first switch unit T can be connected to the cascade circuit between the output end of GIP_1100 and the input end of GIP_1101, so that when the first switch unit T is disconnected, the scanning signal output by GIP_1100 cannot be transmitted to GIP_1101, thereby controlling the downward transmission of the scanning signal.

[0066] Alternatively, as shown in Figure 4 and Figure 5 The first GIP unit is configured to receive a first level frame scanning start signal. When n = 1, the switch unit T is located between the reference GIP unit in the first non-bending area 11 and the reference GIP unit in the second non-bending area 11, and the reference GIP unit in the second non-bending area 11 is configured to receive a second level frame scanning start signal. When n > 1, the second to the n+1th non-bending area 11 is respectively provided with a first reference GIP unit and a second reference GIP unit, and the second to the nth non-bending area is respectively provided with a second reference gate drive unit. The first reference GIP unit in the second to the n+1th non-bending area 11 is respectively configured to receive a second to an n+1th level frame scanning start signal.

[0067] The number of levels of the first reference GIP unit in the same non-bending area 11 is less than the number of levels of the second reference GIP unit. The first reference GIP unit can be close to the upper bending area 12, and the second reference GIP unit can be close to the lower bending area 12.

[0068] The control circuit 22 can also control the output state of each level frame scanning start signal and the on-off state of each switch unit T to correspondingly adjust the working mode of the display panel.

[0069] In the related art, the GIP signal line is a single-layer metal trace. The GIP signal line is open-circuited when the substrate is cracked at the position of the bending area 12 due to external impact. If the GIP signal line fails, the entire screen will display abnormally (the GIP signal line is used to output the frame scanning start signal, the frame scanning start signal is input from the first GIP unit, the GIP signal line fails, and the entire GIP circuit 23 cannot work).

[0070] It should be noted that, in order to avoid mutual interference of frame scanning start signals at different levels, in the application, under normal circumstances, the first level frame scanning start signal is normally output, and the frame scanning start signals of the remaining levels are not output, and each switch unit T is turned on and the number of display rows is kept at a preset normal number. Among them, the control circuit 22 determines that the display panel is in a normal state when the output signals of each reference GIP unit are normal, and the target display parameter remains the display parameter under the above normal condition.

[0071] It can be understood that when n=1, the reference GIP unit in the second non-bending area 11 is used to receive the second level frame scanning start signal, so that when the GIP circuit 23 in the first bending area 12 is abnormal or the GIP signal line transmitting the first level frame scanning start signal is abnormal, the GIP unit can be started by the second level frame scanning start signal, and the first switch unit T is controlled to be disconnected to avoid the output signal of the GIP unit before the first switch unit T affecting the GIP unit after the first switch unit T.

[0072] When n>1, the embodiment makes each first reference GIP unit in the second to (n+1)th non-bending area 11 correspondingly receive the second to (n+1)th level frame scanning start signal, and makes the switch unit T connected to the cascade circuit of the two adjacent GIP units, to control the downward transmission of the frame scanning start signal, and the yth switch unit T is located between the two reference GIP units adjacent to the yth bending area 12, so that when the frame scanning start signal of the previous level is abnormal, the GIP unit can be started by the frame scanning start signal of the subsequent level, and the influence of the false output of the GIP unit of the previous level on the GIP unit of the subsequent level can be avoided by controlling the on-off of the corresponding switch unit T. For example, when the GIP circuit 23 in the first bending area 12 is abnormal, the GIP unit can be started by the second level frame scanning start signal, and the first switch unit T is controlled to be disconnected to avoid the false output of the GIP unit before the first switch unit T affecting the GIP unit after the first switch unit T. For another example, when the GIP circuits 23 in the first and second bending areas 12 are abnormal, the GIP unit can be started by the third level frame scanning start signal, and the second switch unit T is controlled to be disconnected to avoid the false output of the GIP unit before the second switch unit T affecting the GIP unit after the second switch unit T.

[0073] In one embodiment, the control circuit 22 is further configured to determine the working mode of the display panel as the second emergency mode when the output signal of the reference GIP unit in the yth non-bending area 11 is normal and the output signal of the reference GIP unit in the (y+1)th non-bending area 11 is abnormal, wherein in the second emergency mode, the first and (y+1)th frame scanning start signals are normally output, the remaining frame scanning start signals are interrupted, the yth switch unit T is turned off, and the remaining switch units T are turned on, the display area corresponding to the first emergency mode is the display area other than the failure display area, and the failure display area is the continuous display area between the two reference GIP units adjacent to each other in the yth non-bending area 11 and the (y+1)th non-bending area 11, n≥y≥1.

[0074] It can be understood that if the output signal of the reference GIP unit in the yth non-bending area 11 is normal and the output signal of the reference GIP unit in the (y+1)th non-bending area 11 is abnormal, it can be determined that the GIP circuit 23 in the yth bending area 12 is abnormal. By controlling the first and (y+1)th frame scanning start signals to be normally output and the remaining frame scanning start signals to be interrupted, and controlling the yth switch unit T to be turned off and the remaining switch units T to be turned on, and the number of display rows to be kept as the preset normal number of rows, only the yth bending area 12 and the partial area adjacent to the yth bending area 12 are not displayed in this case, the display content is less missing, and the content integrity is basically ensured.

[0075] Exemplarily, as Figure 4 and Figure 5As shown, likewise, n equals 1, i is 2200, the reference GIP unit in the first non-bending area 11 is the 1000th GIP unit GIP_1000, the reference GIP unit in the second non-bending area 11 is the 1200th GIP unit GIP_1200, the detection circuit 21 detects that the GIP_1000 unit output signals (Scan1_1000, Scan2_1000 and EM_1000) are all normal, but detects that the signals (Scan1_1200, Scan2_1200 and EM_1200) output by the GIP_1200 unit have at least one of no output or abnormal output, indicating that the GIP signal line outputting the first-level frame scanning start signal and the clock signal line are normal, and the GIP circuit 23 of the first bending area 12 is abnormal. At this time, the emergency mode is started, the display parameter row number is maintained at 2200 rows, the control circuit 22 controls the output of the second-level frame start signal (SIN1_2, SIN2_2 and EIN1_2) in the emergency mode, the first switch unit T is connected to the cascade circuit between GIP_1100 and GIP_1101, the second-level frame start signal needs to be output after 1200 rows of time of the normal first-level frame start signal output, and the first switch unit T is in the off state. In this case, only the middle part of the bending area 12 and a small range of 1101-1199 rows have no display, and the relative content integrity is basically ensured.

[0076] In one embodiment, the control circuit 22 is further configured to determine the working mode of the display panel as a third emergency mode when the output signal of the reference GIP unit in the yth non-bending area 11 is normal and the output signal of the reference GIP unit in the y+1th non-bending area 11 is abnormal, in the third emergency mode, the y+1th-level frame scanning start signal is normally output, the remaining frame scanning start signals are interrupted, the yth switch unit T is off, and the remaining switch units T are on, the display area corresponding to the third emergency mode is the continuous display area in the y+1th non-bending area 11 to the n+1th non-bending area 11, the display row number of the display panel is less than or equal to the difference between i+1 and the lowest-level reference GIP unit, n≥y≥1.

[0077] It can be understood that, in the case that the output signal of the reference GIP unit in the yth non-bending area 11 is normal and the output signal of the reference GIP unit in the y+1th non-bending area 11 is abnormal, it can be determined that the GIP circuit 23 in the yth bending area 12 is abnormal, at this time, the display can be performed through the y+1th non-bending area 11 and the areas after the y+1th non-bending area 11. By controlling the y+1th level frame scanning start signal to normally output, the remaining level frame scanning start signals to interrupt output, controlling the yth switch unit T to be off and the remaining switch units T to be on, and switching the display line number to be less than or equal to the difference between i+1 and the lowest level reference GIP unit level in the y+2th non-bending area 11, the y+2th non-bending area 11 and the areas after the y+2th non-bending area 11 can be displayed.

[0078] Exemplarily, as shown in Figure 4 and Figure 5 , n is equal to 1, i is 2200, the reference GIP unit in the first non-bending area 11 is the 1000th GIP unit GIP_1000, and the reference GIP unit in the second non-bending area 11 is the 1200th GIP unit GIP_1200. In the case that the output signal of GIP_1000 is normal and the output signal of GIP_1200 is abnormal, the first level frame scanning start signal is controlled to interrupt output, the second level frame scanning start signal is controlled to normally output, the first switch unit T is controlled to be off, the display line number is switched to 1001, and the number of active periods of the clock signal is reduced to 1001, so that the complete content can be displayed in the 1200-2200th line area.

[0079] In the application, in the case that there are multiple bending areas 12, the GIP circuit 23 in multiple bending areas 12 can be abnormal, and the display area can be determined by repeating the above process. Exemplarily, after the control circuit 22 controls the y+1th level frame scanning start signal to normally output, the remaining level frame scanning start signals to interrupt output, the yth switch unit T to be off, the remaining switch units T to be on, and the display line number to be switched, if it is detected that the output signal of the reference GIP unit in the y+1th non-bending area 11 is normal and the output signal of the reference GIP unit in the y+2th non-bending area 11 is abnormal, the y+2th level frame scanning start signal can be controlled to normally output, the remaining level frame scanning start signals to interrupt output, the y+1th switch unit T to be off, the remaining switch units T to be on, and the display line number to be switched to be less than or equal to the difference between i+1 and the lowest level reference GIP unit level in the y+2th non-bending area 11, so that the y+2th non-bending area 11 and the areas after the y+2th non-bending area 11 can be displayed.

[0080] In one embodiment, the control circuit 22 is further configured to determine the working mode of the display panel as a fourth emergency mode in the case that the output signal of the reference GIP unit in the first non-bending area 11 is abnormal, in which the second level frame scanning start signal is normally output, the rest of the level frame scanning start signals are interrupted, the first switch unit T is turned off, the rest of the switch units T are turned on, and the display area corresponding to the working mode of the display panel is the continuous display area in the second non-bending area 11 to the (n+1)th non-bending area 11, and the display line number of the display panel is less than or equal to the difference between i+1 and the lowest level of the reference GIP unit in the second non-bending area 11.

[0081] It can be understood that in the case that the output signal of the reference GIP unit in the first non-bending area 11 is abnormal, it can be determined that the first level GIP unit does not receive the normal first level frame scanning start signal, and at least one of the GIP signal line and the clock signal line outputting the first level frame scanning start signal is abnormal. In this case, the second level frame scanning start signal is normally output, the rest of the level frame scanning start signals are interrupted, the first switch unit T is turned off, the rest of the switch units T are turned on, and the display line number is adjusted, so that the second level frame scanning start signal is used as a new start signal, so that complete content can be displayed in the second non-bending area 11 and the area thereafter.

[0082] Exemplarily, as Figure 4 and Figure 5As shown, n is equal to 1, i is 2200, the reference GIP unit in the first non-bending area 11 is the 1000th GIP unit GIP_1000, and the reference GIP unit in the second non-bending area 11 is the 1200th GIP unit GIP_1200. It can be understood that if any one of the three output signals (Scan1_1000, Scan2_1000, EM_1000) of the GIP_1000 unit has no output or abnormal output, it indicates that the bending area 12 is abnormal, which causes at least one of the signal lines for transmitting the first-level frame scanning start signal (SIN1, SIN2, EIN1) and the clock signal (Scan1_CLK1, Scan1_CLK2, Scan2_CLK1, Scan2_CLK2, ECK1, ECK2) to be abnormal, so that the corresponding signal cannot be transmitted to the first GIP unit. In the case where the GIP signal line for providing the first-level frame scanning start signal and / or the clock signal line is damaged, the first GIP unit cannot work normally, and thus the GIP_1000 and GIP_1200 cannot receive the normal first-level frame scanning start signal. Therefore, the GIP_1000 and GIP_1200 cannot work normally, and the output signals of the GIP_1000 and GIP_1200 are abnormal. Based on the above principle, the control circuit 22 can determine that the GIP signal line for providing the first-level frame scanning start signal is damaged in the case where the output signal of the GIP_1000 is abnormal, control the first-level frame scanning start signal to be interrupted and output, the second-level frame scanning start signal to be normally output, the first switch unit T to be disconnected, and the number of display rows to be switched to 1001, so that the complete content can be displayed in the 1200-2200 row area.

[0083] In the application, when there are multiple levels of frame scanning start signals, multiple GIP signal lines may be damaged at the same time. Therefore, the above method can be used for step-by-step checking. Specifically, when detecting the GIP signal line for outputting the y+1th frame start signal, the y+1th frame scanning start signal is normally output, the remaining frame start signals are interrupted, the yth switch unit T is disconnected, and the remaining switch units T are turned on. Whether the corresponding signal line is normal can be determined by detecting the output signal of the reference GIP unit in the y+1th non-bending area 11. When the output signal of the reference GIP unit in the y+1th non-bending area 11 is abnormal, it can be determined that the GIP signal line for outputting the y+1th frame start signal is abnormal and / or the corresponding clock signal line is abnormal. The value of y is changed from 1 to n, and whether each GIP signal line is abnormal can be determined according to whether the output signal of the reference GIP unit in each non-bending area 11 is normal.

[0084] In the case that the GIP signal line outputting the (y+1)th frame start signal is abnormal, the (y+2)th frame scanning start signal can be controlled to be normally output, the rest of the frame scanning start signals can be controlled to be interrupted, the (y+1)th switch unit T can be controlled to be turned off, the rest of the switch units T can be controlled to be turned on, and the display line number is switched to a value less than or equal to the difference between i+1 and the lowest level of the reference GIP unit in the (y+2)th non-bending area 11.

[0085] For example, in the case that the output signal of the reference GIP unit in the first non-bending area 11 is abnormal, it can be determined that the GIP signal line providing the first frame scanning signal is abnormal, at this time, the control circuit 22 can control the second frame scanning start signal to be normally output, the rest of the frame scanning start signals to be interrupted, the first switch unit T to be turned off, the rest of the switch units T to be turned on, and the display line number to be switched to z_1 lines, at this time, z_1 is equal to the difference between i+1 and the lowest level of the reference GIP unit in the second non-bending area 11, so as to perform emergency display. After the above operation, it is detected that the output signal of the reference GIP unit in the second non-bending area 11 is abnormal, at this time, it is determined that the GIP signal line providing the second frame scanning signal is damaged, in order to perform emergency display, the control circuit 22 can control the second switch unit T to be turned off, the third frame scanning start signal to be normally output, the rest of the frame scanning start signals to be interrupted, and the display line number to be switched to z_2 lines, at this time, z_2 is equal to the difference between i+1 and the lowest level of the reference GIP unit in the third non-bending area 11. In this way, emergency display in the corresponding scene can be realized.

[0086] It should be noted that in the application, in the case that multiple emergency working modes are available in the emergency scene, a prompt information can be sent, and the emergency working mode in the emergency scene is determined based on the selection instruction input by the user.

[0087] Based on the same inventive concept, in one embodiment, as shown in Figure 6 The application further provides a control method of the GIP circuit 23, applied to a display driving circuit of a display panel, the display panel comprising n bending areas 12 and n+1 non-bending areas 11, one bending area 12 being arranged between any two adjacent non-bending areas 11, the display driving circuit comprising the GIP circuit 23, the GIP circuit 23 comprising i levels of GIP units, n≥1, i≥3; the control method comprising:

[0088] S601: acquiring output signals of at least n+1 reference GIP units, wherein each reference GIP unit is a GIP unit selected in each non-bending area 11, and the output end of each reference GIP unit is connected to a reference pixel circuit located in each non-bending area 11.

[0089] The display panel includes a GIP signal line and a clock signal line. The GIP signal line is used to transmit the frame scan start signal, and the clock signal line is used to transmit the clock signal. After receiving the frame scan start signal and the clock signal, the GIP unit outputs the first scan signal Scan1, the second scan signal Scan2, and the light emission control signal EM.

[0090] S602: Determine the operating mode of the display panel based on the output signals of each reference GIP unit, wherein different operating modes correspond to different display areas.

[0091] Taking n=1 as an example, such as Figure 1 and Figure 2 As shown, the first non-bending area 11 and the second non-bending area 11 are located on either side of the first bending area 12. If the GIP circuit 23 of the first bending area 12 is damaged, causing the GIP unit in this area to fail, the first-level frame scan start signal cannot be completely transmitted to the GIP unit of the second non-bending area 11, resulting in abnormal display in the second non-bending area 11. By determining the operating mode of the display panel based on the output signals of each reference GIP unit, the corresponding display area can be determined, allowing the complete content to be displayed in a localized area of ​​the display panel, ensuring emergency use of the display product. For example, the number of display lines can be adjusted so that display only occurs in the first non-bending area 11. Since the GIP unit of the first non-bending area 11 is not affected by the damage to the GIP circuit 23 of the first bending area 12 and can function normally, the complete content can be displayed in the first non-bending area 11.

[0092] The control method of the above-mentioned display driving circuit obtains the output signals of at least n+1 reference GIP units. When an abnormality is detected in the output signal of the reference GIP unit, the working mode of the display panel can be determined according to the output signal of each reference GIP unit. By displaying the complete content in a local area of ​​the display panel, the complete content can still be displayed even after the GIP circuit 23 in the bending area 12 is damaged, ensuring the emergency use of the display product.

[0093] In one embodiment, determining the operating mode of the display panel based on the output signal of each reference GIP unit includes the steps of: acquiring the position information of each reference GIP unit with abnormal output signal, and determining the operating mode of the display panel based on the position information.

[0094] In applications, such as Figure 3 As shown, if at least one of the three signals (Scan1_1000, Scan2_1000 and EM_1000) of the output of the reference GIP unit is missing, it can be determined that the output signal of the reference GIP unit is abnormal.

[0095] Optionally, in the case that the output signal of the reference GIP unit in the yth non-bending area 11 is detected to be normal, the reference GIP unit in the yth non-bending area 11 is taken as a standard GIP unit, the reference GIP unit in the y+1th non-bending area 11 is taken as a to-be-detected GIP unit, the difference between the level of the to-be-detected GIP unit and the level of the standard GIP unit is obtained, the interval scanning time is determined according to the difference, and in the case that the output signal of the standard GIP unit is received for the interval scanning time and the three signals output by the to-be-detected GIP unit are not received, it is determined that the output signal of the to-be-detected GIP unit is abnormal, n≥y≥1.

[0096] For example, in the case that the output signal of the reference GIP unit in the first non-bending area 11 is detected to be normal, the reference GIP unit GIP_1000 (1000th level GIP unit) in the first non-bending area 11 is taken as a standard GIP unit, and the reference GIP unit GIP_1200 (1200th level GIP unit) in the y+1th non-bending area 11 is taken as a to-be-detected GIP unit, the difference between the level of the to-be-detected GIP unit and the level of the standard GIP unit is 200, the interval scanning time between the to-be-detected GIP unit and the standard GIP unit is 200 rows of scanning time, and in the case that the time after the output signal of the standard GIP unit is received reaches 200 rows of scanning time and the three signals output by the to-be-detected GIP unit GIP_1200 are not received, it is determined that the output signal of the to-be-detected GIP unit GIP_1200 is abnormal.

[0097] In one embodiment, the control method of the display driving circuit further comprises: in the case that the output signal of the reference GIP unit in the yth non-bending area 11 is normal and the output signal of the reference GIP unit in the y+1th non-bending area 11 is abnormal, determining that the working mode of the display panel is a first emergency mode, wherein the display area corresponding to the first emergency mode is the continuous display area in the first non-bending area 11 to the yth non-bending area 11, and the display row number of the display panel is less than or equal to the level of the highest level reference GIP unit with a normal output signal, n≥y≥1.

[0098] Exemplarily, as Figure 3As shown, n is equal to 1, i is 2200, the reference GIP unit in the first non-bending area 11 is the 1000th GIP unit GIP_1000, and the reference GIP unit in the second non-bending area 11 is the 1200th GIP unit GIP_1200. It can be understood that, in the case that the GIP circuit 23 in the first bending area 12 is damaged, GIP_1000 can normally output signals (Scan1_1000, Scan2_1000 and EM_1000 are normal), while GIP_1200 cannot normally work due to the fact that it does not completely receive the first level frame scanning start signal, and the output signals of GIP_1200 are abnormal (that is, at least one of Scan1_1200 / Scan2_1200 / EM_1200 has no output or abnormal output). On this basis, the level of the highest reference GIP unit with normal output signals is 1000, and the display area before GIP_1000 in the first non-bending area 11 can be used to display complete content. Specifically, in the case that the output signals of GIP_1000 are normal and the output signals of GIP_1200 are abnormal, it is determined that the GIP circuit 23 in the first bending area 12 is damaged, the number of display lines is adjusted to 1001, and the number of effective periods of the clock signal is reduced to 1001, so that complete content can be displayed in the display area of 1-1000 lines (the display area between GIP_1 and GIP_1000).

[0099] In one embodiment, as shown in FIG. 1, the display driving circuit further comprises n switch units T, and n is an integer greater than or equal to 1. Figure 4 and Figure 5 As shown, the GIP circuit 23 further comprises n switch units T; when n = 1, the reference GIP unit in the second non-bending area 11 is used to receive the second level frame scanning start signal; when n > 1, the second to (n+1)th non-bending areas 11 are each provided with a first reference GIP unit and a second reference GIP unit, and the first reference GIP units in the second to (n+1)th non-bending areas 11 are respectively used to correspondingly receive the second to (n+1)th level frame scanning start signals; the control method of the display driving circuit further comprises the step of: in the case that the output signals of the reference GIP unit in the yth non-bending area 11 are normal and the output signals of the reference GIP unit in the (y+1)th non-bending area 11 are abnormal, determining that the working mode of the display panel is a second emergency mode, wherein, in the second emergency mode, the first level and the (y+1)th level frame scanning start signals are normally output, the remaining level frame scanning start signals are interrupted, the yth switch unit T is turned off, and the remaining switch units T are turned on, the display area corresponding to the first emergency mode is the display area except the fault display area, the fault display area is the continuous display area between the two reference GIP units adjacent to each other in the yth non-bending area 11 and the (y+1)th non-bending area 11, and n ≥ y ≥ 1.

[0100] It can be understood that if the output signal of the reference GIP unit in the yth non-bending area 11 is normal and the output signal of the reference GIP unit in the y+1th non-bending area 11 is abnormal, it can be determined that the GIP circuit 23 in the yth bending area 12 is abnormal. By controlling the normal output of the first and y+1th frame scanning start signals and the interruption of the output of the frame scanning start signals of the remaining levels, controlling the disconnection of the yth switch unit T and the conduction of the remaining switch units T, and keeping the number of display lines as the preset normal number of lines, only the yth bending area 12 and the adjacent partial area of the yth bending area 12 are not displayed, the missing of the display content is less, and the integrity of the content is basically ensured.

[0101] Exemplarily, as shown in Figure 4 and Figure 5 , similarly, n is equal to 1, i is 2200, the reference GIP unit in the first non-bending area 11 is the 1000th GIP unit GIP_1000, the reference GIP unit in the second non-bending area 11 is the 1200th GIP unit GIP_1200, it is detected that the output signals (Scan1_1000, Scan2_1000 and EM_1000) of the GIP_1000 unit are all normal, but it is detected that at least one of the output signals (Scan1_1200, Scan2_1200 and EM_1200) of the GIP_1200 unit is abnormal or has no output, which indicates that the GIP signal line and the clock signal line outputting the first level frame scanning start signal are normal, and the GIP circuit 23 of the first bending area 12 is abnormal. At this time, the emergency mode is started, the number of display parameters is maintained as 2200 lines, the second level frame start signal (SIN1_2, SIN2_2 and EIN1_2) in the emergency mode is controlled to be output, the first switch unit T is connected to the cascade circuit between GIP_1100 and GIP_1101, the second level frame start signal needs to be output after the normal first level frame start signal is output for 1200 lines, and the first switch unit T is in the disconnected state. In this case, only the middle part of the bending area 12 and a small range of 1101-1199 lines are not displayed, and the relative integrity of the content is basically ensured.

[0102] In one embodiment, the control method of the display driving circuit further includes: determining the operating mode of the display panel as a third emergency mode when the output signal of the reference GIP unit in the y-th non-bending region 11 is normal and the output signal of the reference GIP unit in the (y+1)-th non-bending region 11 is abnormal. In the third emergency mode, the frame scan start signal of the (y+1)-th level is output normally, the frame scan start signals of the remaining levels are interrupted, the y-th switch unit T is turned off, and the remaining switch units T are turned on. The display area corresponding to the third emergency mode is a continuous display area from the (y+1)-th non-bending region 11 to the (n+1)-th non-bending region 11. The number of display rows of the display panel is less than or equal to the difference between i and the lowest level reference GIP unit level where the output signal is abnormal, and n≥y≥1.

[0103] It is understandable that if the output signal of the reference GIP unit in the y-th non-bending region 11 is normal, but the output signal of the reference GIP unit in the (y+1)-th non-bending region 11 is abnormal, it can be determined that the GIP circuit 23 in the y-th bending region 12 is abnormal. At this time, it can be displayed through the (y+1)-th non-bending region 11 and the area thereafter. By controlling the normal output of the (y+1)-th level frame scan start signal and interrupting the output of the frame scan start signals of the other levels, controlling the y-th switch unit T to be open and the other switch units T to be open, and switching the number of display lines to be less than or equal to the difference between i+1 and the lowest level reference GIP unit level with abnormal output signal, it is possible to control the display of the (y+1)-th non-bending region 11 and the area thereafter.

[0104] For example, such as Figure 1 and Figure 5 As shown, n equals 1, i is 2200, the reference GIP unit in the first non-bend area 11 is the 1000th level GIP unit GIP_1000, and the reference GIP unit in the second non-bend area 11 is the 1200th level GIP unit GIP_1200. When the output signal of GIP_1000 is detected to be normal, but the output signal of GIP_1200 is abnormal, the first level frame scan start signal is interrupted, the second level frame scan start signal is output normally, the first switch unit T is turned off, the number of display lines is switched to 1001, and the effective number of clock signal cycles is reduced to 1001, so that the complete content can be displayed in the 1200-2200 line area.

[0105] In the application, in the case that there are multiple bending areas 12, if the GIP circuit 23 in multiple bending areas 12 is abnormal, the display area can be determined by repeating the above process. For example, after the y+1th frame scanning start signal is controlled to be normally output, the rest of the frame scanning start signals are controlled to be interrupted, the yth switch unit T is controlled to be off, the rest of the switch units T are controlled to be on, and the display line number is displayed, if it is detected that the output signal of the reference GIP unit in the y+1th non-bending area 11 is normal and the output signal of the reference GIP unit in the y+2th non-bending area 11 is abnormal, the y+2th frame scanning start signal can be controlled to be normally output, the rest of the frame scanning start signals are controlled to be interrupted, the y+1th switch unit T is controlled to be off, the rest of the switch units T are controlled to be on, and the display line number is switched to be less than or equal to the difference between i+1 and the level number of the lowest level reference GIP unit in the y+2th non-bending area 11, so that the y+2th non-bending area 11 and the areas after the y+2th non-bending area 11 are displayed.

[0106] In one embodiment, the control method of the display driving circuit further comprises the step of determining the working mode of the display panel to be the fourth emergency mode in the case that the output signal of the reference GIP unit in the first non-bending area 11 is abnormal, in which the second frame scanning start signal is normally output, the rest of the frame scanning start signals are interrupted, the first switch unit T is off, the rest of the switch units T are on, and the display area corresponding to the working mode of the display panel is the continuous display area in the second non-bending area 11 to the n+1th non-bending area 11, and the display line number of the display panel is less than or equal to the difference between i+1 and the level number of the lowest level reference GIP unit in the second non-bending area 11.

[0107] It can be understood that in the case that the output signal of the reference GIP unit in the first non-bending area 11 is abnormal, it can be determined that the first level GIP unit does not receive the normal first level frame scanning start signal, and at least one of the GIP signal line and the clock signal line outputting the first level frame scanning start signal is abnormal. In this case, the second frame scanning start signal is normally output, the rest of the frame scanning start signals are interrupted, the first switch unit T is off, the rest of the switch units T are on, and the display line number is adjusted, so that the second frame scanning start signal is used as the new start signal, and the complete content can be displayed in the second non-bending area 11 and the areas after the second non-bending area 11.

[0108] For example, as Figure 5As shown, n is equal to 1, i is 2200, the reference GIP unit in the first non-bending area 11 is the 1000th GIP unit GIP_1000, and the reference GIP unit in the second non-bending area 11 is the 1200th GIP unit GIP_1200. It can be understood that if any one of the three output signals (Scan1_1000, Scan2_1000, EM_1000) of the GIP_1000 unit has no output or abnormal output, it indicates that the bending area 12 is abnormal, causing at least one of the signal lines outputting the first-stage frame scanning start signal (SIN1, SIN2, EIN1) and the clock signal (Scan1_CLK1, Scan1_CLK2, Scan2_CLK1, Scan2_CLK2, ECK1, ECK2) to be abnormal, causing the corresponding signal to be unable to be transmitted to the first GIP unit. In the case where the GIP signal line providing the first-stage frame scanning start signal and / or the clock signal line is damaged, the first-stage GIP unit cannot work normally, and thus the GIP_1000 and GIP_1200 cannot receive the normal first-stage frame scanning start signal. Therefore, the GIP_1000 and GIP_1200 cannot work normally, and the output signals of the GIP_1000 and GIP_1200 are abnormal. Based on the above principle, in the case where the output signal of the GIP_1000 is detected to be abnormal, it can be determined that the GIP signal line providing the first-stage frame scanning start signal is damaged, the first-stage frame scanning start signal is interrupted, the second-stage frame scanning start signal is normally output, the first switch unit T is disconnected, and the number of display rows is switched to 1001, so that the complete content in the 1200-2200 row area can be displayed.

[0109] In the application, when there are multiple-stage frame scanning start signals, multiple GIP signal lines can be damaged at the same time. Therefore, the above method can be used for step-by-step checking. Specifically, when the GIP signal line outputting the y+1th-stage frame start signal is detected, the y+1th-stage frame scanning start signal is normally output, the remaining stage frame start signals are interrupted, the yth switch unit T is disconnected, and the remaining switch units T are turned on. Whether the corresponding signal line is normal can be determined by detecting the output signal of the reference GIP unit in the y+1th non-bending area 11. When the output signal of the reference GIP unit in the y+1th non-bending area 11 is abnormal, it can be determined that the GIP signal line outputting the y+1th-stage frame start signal is abnormal and / or the corresponding clock signal line is abnormal. The value of y is changed from 1 to n, and whether each GIP signal line is abnormal can be detected according to whether the output signal of the reference GIP unit in each non-bending area 11 is normal.

[0110] When the GIP signal line outputting the (y+1)th frame start signal is abnormal, the (y+2)th frame scanning start signal can be controlled to be normally output, the rest of the frame scanning start signals can be controlled to be interrupted, the (y+1)th switch unit T can be controlled to be turned off, the rest of the switch units T can be controlled to be turned on, and the display line number can be switched to a value less than or equal to the difference between i+1 and the lowest level of the reference GIP unit in the (y+2)th non-bending area 11.

[0111] For example, when the output signal of the reference GIP unit in the first non-bending area 11 is abnormal, it can be determined that the GIP signal line providing the first frame scanning signal is abnormal, at this time, the second frame scanning start signal can be controlled to be normally output, the rest of the frame scanning start signals can be controlled to be interrupted, the first switch unit T can be controlled to be turned off, the rest of the switch units T can be controlled to be turned on, and the display line number can be switched to z_1 lines, at this time, z_1 is equal to the difference between i+1 and the lowest level of the reference GIP unit in the second non-bending area 11, so as to perform emergency display. After the above operation, when the output signal of the reference GIP unit in the second non-bending area 11 is abnormal, it is determined that the GIP signal line providing the second frame scanning signal is damaged, in order to perform emergency display, the control circuit 22 can control the second switch unit T to be turned off, the third frame scanning start signal to be normally output, the rest of the frame scanning start signals to be interrupted, and the display line number to be switched to z_2 lines, at this time, z_2 is equal to the difference between i+1 and the lowest level of the reference GIP unit in the third non-bending area 11. In this way, emergency display can be performed in the corresponding scene.

[0112] It should be understood that although each step in the flowchart of the accompanying drawings is shown in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the accompanying drawings can include multiple steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0113] In one embodiment, the present application also provides a computer storage medium, which stores a computer program, characterized in that the computer program is executed by a processor to realize the steps of the control method of the display driving circuit.

[0114] In one embodiment, the application further provides a display panel comprising the display driving circuit according to any one of the above embodiments, wherein the display panel has a display area and a non-display area, the display area is provided with a pixel circuit, and the non-display area is provided with the GIP circuit 23.

[0115] The display panel described above comprises the display driving circuit, the display driving circuit is connected with the reference GIP unit in each non-bending area 11 through the detection circuit 21, the output signal of the reference GIP unit is detected through the detection circuit 21, when the detection circuit 21 detects that the output signal of the reference GIP unit is abnormal, the control circuit 22 can determine the working mode of the display panel according to the output signal of each reference gate driving unit, and the complete content can be displayed in the local area of the display panel, so that the complete content can still be displayed after the GIP circuit 23 of the bending area 12 is damaged, and the emergency use of the display product is ensured.

[0116] In one embodiment, the application further provides a display device comprising the display driving panel described above.

[0117] It can be understood that the display device in the embodiments of the application can be an OLED display device, a QLED display device, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a wearable device, an Internet of Things device, or any product or component having a display function, and the embodiments disclosed in the application do not limit this.

[0118] In the description of the present specification, the description of the terms "some embodiments", "other embodiments", "ideal embodiments", and the like means that the specific features, structures, materials, or characteristics described in combination with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0119] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not contradict each other, they should be considered as within the scope of the present specification.

[0120] The above-described embodiments only express several implementation manners of the application, the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the application, and these are within the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.

Claims

1. A display driving circuit applied to a display panel, the display panel comprising a bending area and a non-bending area, two adjacent non-bending areas being provided with one bending area, characterized in that, The display driving circuit comprises: The gate driving circuit comprises i-stage cascaded gate driving units, i≥3; The detection circuit is connected with the output terminals of the plurality of reference gate driving units respectively, wherein each of the reference gate driving units is the gate driving unit selected in each of the non-bending areas, and the output terminals of each of the reference gate driving units are connected with the reference pixel circuits located in each of the non-bending areas respectively; The control circuit is used for determining the working mode of the display panel according to the output signals of each of the reference gate driving units, wherein different working modes correspond to different display areas; The display area comprises n bending areas and n+1 non-bending areas, n>1; the detection circuit is connected with the output terminals of at least n+1 reference gate driving units respectively; The gate driving circuit further comprises n switch units, and the control circuit is connected with the control terminals of each of the switch units; wherein the switch unit is connected on the cascaded lines of two adjacent gate driving units to control the downward transmission of the scanning signal, and the yth switch unit is located between two reference gate driving units adjacent to the yth bending area, n≥y≥1; the control circuit controls the on-off state of the switch unit according to the output signal of each of the reference gate driving units; The first-stage gate driving unit is used for receiving a first-stage frame scanning start signal; when n=1, the switch unit is located between the reference gate driving unit in the first non-bending area and the reference gate driving unit in the second non-bending area, and the reference gate driving unit in the second non-bending area is used for receiving a second-stage frame scanning start signal; when n>1, each of the second to n+1 non-bending areas is provided with a first reference gate driving unit, and each of the second to n non-bending areas is further provided with a second reference gate driving unit, and each of the first reference gate driving units in the second to n+1 non-bending areas is used for correspondingly receiving a second to n+1 stage frame scanning start signal; The control circuit is further used for, when there are multiple-stage frame scanning start signals, when detecting the gate driving signal line outputting the y+1 stage frame start signal, normally outputting the y+1 stage frame scanning start signal, interrupting the output of the remaining stage frame start signals, and turning off the yth switch unit and turning on the remaining switch units, judging whether the corresponding signal line is normal by detecting the output signal of the reference gate driving unit in the y+1 non-bending area, when the output signal of the reference gate driving unit in the y+1 non-bending area is abnormal, determining that the gate driving signal line outputting the y+1 stage frame start signal and / or the corresponding clock signal line is abnormal; changing y from 1 to n in turn, and detecting whether each gate driving signal line is abnormal according to whether the output signal of the reference gate driving unit in each non-bending area is normal.

2. The display driving circuit according to claim 1, wherein The control circuit is further used for acquiring the position information of each of the reference gate driving units with abnormal output signals, and determining the working mode of the display panel according to the position information.

3. The display driving circuit according to claim 1, wherein The control circuit is further configured to determine the working mode of the display panel as a first emergency mode in a case that the output signal of the reference gate driving unit in the yth non-bending area is normal and the output signal of the reference gate driving unit in the y+1th non-bending area is abnormal, wherein the first emergency mode corresponds to a continuous display area from the 1st non-bending area to the yth non-bending area, and the display line number of the display panel is less than or equal to the stage number of the highest-stage reference gate driving unit with the normal output signal.

4. The display driving circuit according to claim 3, wherein In the normal mode, the first-stage frame scanning start signal is normally output, the frame scanning start signals of the remaining stages are interrupted, each of the switch units is turned on, and the display line number is kept as a preset normal line number.

5. The display driving circuit according to claim 1, wherein The control circuit is further configured to determine the working mode of the display panel as a second emergency mode in a case that the output signal of the reference gate driving unit in the yth non-bending area is normal and the output signal of the reference gate driving unit in the y+1th non-bending area is abnormal, wherein in the second emergency mode, the first-stage and y+1th-stage frame scanning start signals are normally output, the frame scanning start signals of the remaining stages are interrupted, the yth switch unit is turned off, and the remaining switch units are turned on, the second emergency mode corresponds to a display area except for a fault display area, the fault display area is a continuous display area between two adjacent reference gate driving units in the yth non-bending area and the y+1th non-bending area, and n≥y≥1.

6. The display driving circuit according to claim 1, wherein The control circuit is further configured to determine the working mode of the display panel as a third emergency mode in a case that the output signal of the reference gate driving unit in the yth non-bending area is normal and the output signal of the reference gate driving unit in the y+1th non-bending area is abnormal, wherein in the third emergency mode, the y+1th-stage frame scanning start signal is normally output, the frame scanning start signals of the remaining stages are interrupted, the yth switch unit is turned off, and the remaining switch units are turned on, the third emergency mode corresponds to a continuous display area from the y+1th non-bending area to the n+1th non-bending area, and the display line number of the display panel is less than or equal to the difference between i+1 and the stage number of the lowest-stage reference gate driving unit with the abnormal output signal.

7. The display driving circuit according to claim 1, wherein The control circuit is further configured to determine the working mode of the display panel as a fourth emergency mode in a case that the output signal of the reference gate driving unit in the first non-bending area is abnormal, wherein in the fourth emergency mode, the second-stage frame scanning start signal is normally output, the frame scanning start signals of the remaining stages are interrupted, the first switch unit is turned off, and the remaining switch units are turned on, the working mode of the display panel corresponds to a continuous display area from the second non-bending area to the n+1th non-bending area, and the display line number of the display panel is less than or equal to the difference between i+1 and the stage number of the lowest-stage reference gate driving unit in the second non-bending area.

8. The display driving circuit according to claim 1, wherein, Each of the gate driving units is configured to output a first scanning signal, a second scanning signal and a light-emitting control signal, respectively. The detection circuit is configured to determine that the output signal of the reference gate drive unit is abnormal when at least one of the three signals output by the reference gate drive unit is missing.

9. The display driving circuit according to claim 8, wherein, The detection circuit is further configured to, when it is detected that the output signal of the reference gate drive unit in the yth non-bending area is normal, take the reference gate drive unit in the yth non-bending area as a standard gate drive unit, take the reference gate drive unit in the y+1th non-bending area as a to-be-detected gate drive unit, obtain a difference between a level of the to-be-detected gate drive unit and a level of the standard gate drive unit, determine an interval scanning time according to the difference, and determine that the output signal of the to-be-detected gate drive unit is abnormal when the output signal of the standard gate drive unit reaches the interval scanning time and the three signals output by the to-be-detected gate drive unit are not received.

10. A display panel, characterized by, The display driving circuit includes the display driving circuit according to any one of claims 1 to 9, wherein the display panel has a display area and a non-display area, the display area is provided with a pixel circuit, and the non-display area is provided with the gate drive circuit. 11.A control method of a display driving circuit, applied to a display driving circuit of a display panel, characterized in that, The display panel includes bending areas and non-bending areas, any two adjacent non-bending areas are provided with a bending area therebetween, the display driving circuit includes a gate drive circuit, the gate drive circuit includes i-stage cascaded gate drive units, i is greater than or equal to 3, a display area includes n bending areas and n+1 non-bending areas, n is greater than 1, a detection circuit is connected to output ends of at least n+1 reference gate drive units, the gate drive circuit further includes n switch units, a control circuit is connected to control ends of the switch units, the switch units are connected to cascaded lines of two adjacent gate drive units to control downward transmission of a scanning signal, a yth switch unit is located between two reference gate drive units adjacent to a yth bending area, n is greater than or equal to y which is greater than or equal to 1, a first-stage gate drive unit is configured to receive a first-stage frame scanning start signal, when n is equal to 1, the switch unit is located between a reference gate drive unit in a first non-bending area and a reference gate drive unit in a second non-bending area, the reference gate drive unit in the second non-bending area is configured to receive a second-stage frame scanning start signal, when n is greater than 1, a first reference gate drive unit is arranged in each of the second to n+1 non-bending areas, a second reference gate drive unit is arranged in each of the second to n non-bending areas, and the first reference gate drive units in the second to n+1 non-bending areas are configured to correspondingly receive second to n+1 stage frame scanning start signals. The detection circuit is further configured to, when it is detected that the output signal of the reference gate drive unit in the yth non-bending area is normal, take the reference gate drive unit in the yth non-bending area as a standard gate drive unit, take the reference gate drive unit in the y+1th non-bending area as a to-be-detected gate drive unit, obtain a difference between a level of the to-be-detected gate drive unit and a level of the standard gate drive unit, determine an interval scanning time according to the difference, and determine that the output signal of the to-be-detected gate drive unit is abnormal when the output signal of the standard gate drive unit reaches the interval scanning time and the three signals output by the to-be-detected gate drive unit are not received. The working mode of the display panel is determined according to the output signals of the reference gate driving units, wherein different working modes correspond to different display areas; The on-off states of the switch units are controlled according to the output signals of the reference gate driving units; When there are multiple-stage frame scanning start signals, when a gate driving signal line outputting a y+1th-stage frame start signal is detected, the y+1th-stage frame scanning start signal is normally output, the rest of the stage frame start signals are interrupted, the yth switch unit is turned off, and the rest of the switch units are turned on. Whether the corresponding signal line is normal is determined by detecting the output signal of the reference gate driving unit in the y+1th non-bending area. When the output signal of the reference gate driving unit in the y+1th non-bending area is abnormal, it can be determined that the gate driving signal line outputting the y+1th-stage frame start signal is abnormal and / or the corresponding clock signal line is abnormal. The y is changed from 1 to n, and whether each gate driving signal line is abnormal can be detected according to whether the output signal of the reference gate driving unit in each non-bending area is normal.

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