CN111081187B - Flexible display panel, curling detection method and device and display equipment - Google Patents
Flexible display panel, curling detection method and device and display equipment Download PDFInfo
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- CN111081187B CN111081187B CN202010010823.8A CN202010010823A CN111081187B CN 111081187 B CN111081187 B CN 111081187B CN 202010010823 A CN202010010823 A CN 202010010823A CN 111081187 B CN111081187 B CN 111081187B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
Abstract
The embodiment of the application provides a flexible display panel, a curling detection method and device and display equipment, and relates to the technical field of display panels. The flexible display panel includes: the display device comprises a display area, a plurality of GOA circuits positioned at the periphery of the display area and a plurality of switching devices positioned at least one side of the display area; the control end of each switching device is electrically connected with the shift register signal input end of one GOA circuit; the first end of each switching device is electrically connected with the first voltage end; the second end of each switching element outputs a signal to be detected; the display signal output end of each GOA circuit is electrically connected with the shift register signal input end of the next GOA circuit, and the shift register signal input end of the first GOA circuit is used for receiving the first electric signal. The technical problems that in the prior art, the curling detection structure is not arranged on a display panel, so that the process and the structure are complex, or the curling length is not accurate are solved.
Description
Technical Field
The application relates to the technical field of display panels, in particular to a flexible display panel, a curling detection method and device and display equipment.
Background
The flexible display panel, especially the flexible OLED (Organic Light-Emitting Diode), has a wide application prospect in the fields of mobile intelligent devices, wearable devices, vehicle-mounted devices, etc., and the flexible display panel also has the characteristics of being foldable, rollable and stretchable. Especially, the display panel capable of displaying in a curled mode can effectively contain large-size display, effectively save space and determine the display area according to requirements. Therefore, the curling length of the rollable display panel is monitored in real time, so that the unfolding length can be determined according to the curling length, information of the unfolding length is fed back to an Integrated Circuit (IC), the adjustment of the display section according to the unfolding length range is of great importance, incomplete information display and waste of power consumption caused by curling can be avoided, and on the other hand, the ohmic drop of different display ranges can be adjusted by adjusting the display signal voltage or VDD/VSS according to the detected curling length.
At present, strain caused by curling is mainly detected by adopting a method of a strain resistance wire, and a bridge consisting of the strain resistance wire and a resistor outside a display panel is used for sensing deformation to detect the curling length range by voltage change caused by resistance change.
However, the method using the strain resistance wire requires that the strain resistance wire is connected with an external resistor not participating in strain to form a bridge, and the strain resistance wire cannot be completely integrated on the display panel, so that the process and the structure are complex. On the other hand, the resistance of the strain resistance wire is affected by temperature, and because other resistances of the bridge are outside the display panel, resistance fluctuation caused by temperature may cause misreading of the device, resulting in inaccurate curl length detection.
Disclosure of Invention
The flexible display panel, the curling detection method and device and the display equipment are provided aiming at the defects of the existing mode, and the technical problems that in the prior art, the curling detection structure is not arranged on the display panel, so that the process and the structure are complex, or the curling length is inaccurate are solved.
In a first aspect, an embodiment of the present application provides a flexible display panel, including: the display device comprises a display area, a plurality of GOA circuits positioned at the periphery of the display area and a plurality of switching devices positioned at least one side of the display area;
the control end of each switching device is electrically connected with the shift register signal input end of one GOA circuit;
the first end of each switching device is electrically connected with the first voltage end;
the second end of each switching element outputs a signal to be detected;
the display signal output end of each GOA circuit is electrically connected with the shift register signal input end of the next GOA circuit, and the shift register signal input end of the first GOA circuit is used for receiving the first electric signal.
Optionally, the first clock signal input terminal and the second clock signal input terminal of each GOA circuit are respectively configured to receive the second electrical signal and the third electrical signal, and the second electrical signal and the third electrical signal are inverted timing signals.
Optionally, the second terminal of each switching device is electrically connected to the same signal output terminal, and is configured to output a signal to be detected.
Optionally, the number of the GOA circuits is twice that of the switching devices;
the control end of each switching device is electrically connected with the shift register signal input end of one GOA circuit and the display signal output end of the other GOA circuit;
one GOA circuit is a previous GOA circuit of another GOA circuit.
In a second aspect, an embodiment of the present application provides a method for detecting curling of a flexible display panel, which is applied to the flexible display panel of the first aspect, and includes the following steps:
acquiring signals to be detected which are sequentially output by second ends of a plurality of switching devices;
when the current and the latter two adjacent signals to be detected jump, determining a switching device corresponding to the jump;
the curl length of the flexible display panel is determined according to the corresponding switching device.
Optionally, when two adjacent signals to be detected jump, determining the switching device corresponding to the jump, includes:
if the signal to be detected of the previous switch device is a first preset electrical signal when the previous switch device is in a curled state, and the signal to be detected of the next switch device is a second preset electrical signal when the next switch device is in an unfolded state, jumping of two adjacent signals to be detected in front and back is determined;
determining a corresponding switch device when the signal to be detected jumps according to the detected time when the signal to be detected jumps and preset information, wherein the preset information comprises: the interval duration of the signal to be detected of each switching device or the detected time corresponds to each switching device.
Optionally, determining a curl length of the flexible display panel according to the corresponding switching device includes:
determining the number of switching devices within the crimp length range according to the corresponding switching devices;
and determining the curling length of the flexible display panel according to the number of the switching devices and the preset distance between two adjacent switching devices.
In a third aspect, an embodiment of the present application provides a curl detection apparatus for a flexible display panel, which is applied to the flexible display panel of the first aspect, and includes:
the acquisition module is used for acquiring signals to be detected which are sequentially output by the second ends of the plurality of switching devices;
the first determining module is used for determining a switching device corresponding to the jump when the front and the back adjacent signals to be detected jump;
and the second determining module is used for determining the curling length of the flexible display panel according to the corresponding switching device.
In a fourth aspect, embodiments of the present application provide a rollable display device, including: a processor; and
a memory configured to store machine readable instructions which, when executed by the processor, implement a method of curl detection of a flexible display panel as in the second aspect.
In a fifth aspect, embodiments of the present application provide a computer storage medium for storing computer instructions, which when executed on a computer, implement the method for detecting curling of a flexible display panel according to the second aspect.
The technical scheme provided by the embodiment of the application has the following beneficial technical effects:
the plurality of switch devices of the embodiment of the application are arranged on at least one side of the display area of the display panel, and the plurality of GOA circuits are GOA circuits on the existing display panel, so that the whole curling detection structure is completely integrated on the display panel, and the process and the structure are relatively simple.
The utility model provides a plurality of switching devices utilize the aversion of current GOA circuit to register the signal and control a plurality of switching devices and open in proper order and switch on, then wait to detect the switching device who detects the signal and judge the last switching device that is in the crimp state according to detecting switching device output, can realize the real-time supervision to the crimp length of flexible display panel, a plurality of switching devices switch on under the control of the aversion of GOA circuit is registered the signal, the crimp length is judged to wait to detect the signal through switching device output, ambient temperature can not disturb and waits to detect the signal, it is more accurate to detect crimp length.
According to the embodiment of the application, the influence of stress and interlayer dislocation generated in the curling process on the electrical characteristics of the switch devices is utilized, and meanwhile, the shift register function of the GOA circuit based on the existing display panel is only needed to be arranged on the display panel, so that the space and the signal source of the display panel are saved. Moreover, with the development trend of light and thin integration of the flexible display panel, the curling detection is integrated on the panel by using the existing process, so that the device cost is reduced, and the light and thin requirements can be met.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a flexible display panel channel mobility variation in a rolled tensioned state;
fig. 2 is a schematic diagram of a threshold voltage variation of a switching device of a flexible display panel in a rolled tensioned state;
fig. 3 is a schematic layout diagram of a switching device of a flexible display panel in a rolled state according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a flexible display panel according to an embodiment of the present application;
FIG. 5 is a timing diagram of signals output by the CLK signal line and the CLB signal line of the flexible display panel according to an embodiment of the present invention;
fig. 6 is a timing diagram of shift register signals of a plurality of sequential GOA circuits of the flexible display panel according to the embodiment of the present disclosure;
fig. 7 is a timing diagram of signals to be detected of the flexible display panel according to the embodiment of the present application;
FIG. 8 is a flow chart of a method for curl detection of a flexible display panel according to an embodiment of the present application;
fig. 9 is a flowchart of a method for detecting curling of a flexible display panel according to another embodiment of the present application;
fig. 10 is a block diagram illustrating a structure of a curl detection apparatus for a flexible display panel according to an embodiment of the present application;
fig. 11 is a block diagram of a rollable display device according to an embodiment of the present application.
Reference numerals:
1-display area, 2-GOA circuit, 3-switch device;
10-a curl detection device for a flexible display panel;
101-an obtaining module, 102-a first determining module, 103-a second determining module;
11-a rollable display device;
111-processor, 112-memory, 113-bus.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The inventors of the present application have conducted research to find that a neutral layer exists in the flexible display panel according to the film structure during the curling process, and the neutral layer has a stress of 0 and a strain of 0 during the curling process. The compressive stress on one side of the neutral layer generates compressive strain, the tensile stress on one side generates tensile strain, and the farther away from the neutral layer, the larger the stress. In the process of rolling, the edge of the flexible display panel is fixed and rolled from one side to the other side or rolled from two sides to the middle. Because the edges are fixed, the deformation caused by the curl is unidirectional to the film, and the curl may cause interlaminar dislocation between different films. For LTPS (Low Temperature polysilicon technology) transistors with the channel length along the curl direction, the strain caused by the curl affects the carrier mobility of the channel, i.e., the channel carrier mobility is affected by stress.
Further research by the inventors of the present application has found that the channel mobility is greatly affected by strain, while the threshold voltage Vth is less affected by deformation. Referring to fig. 1, the channel mobility is significantly affected by strain, μ/μ 0: is the ratio of the carrier mobility of the strained channel to the carrier mobility of the unstrained channel. And (3) Strain: and the strain refers to the local relative deformation of an object under the action of factors such as external force and a non-uniform temperature field. 0.6% and 0.6% represent strainsSmall, positive being the proportion of elongation and negative being the proportion of compression, see figure 2, S0Is the voltage swing, the TFT parameter that can be obtained from the TFT transfer characteristic curve, S/S0Is the ratio of the amplitude of the threshold swing before and after deformation, the threshold voltage Vth is less influenced by the deformation, Vth/VthoThe ratio of the threshold voltage before and after the strain is not changed much.
The inventor of the present application further studies and finds that, referring to fig. 3, the interlayer dislocation caused by the curl may cause the edge of the channel region not to be completely covered and controlled by the gate, and the channel may not be completely conducted. Therefore, the on characteristics of a TFT (Thin Film Transistor) in a rolled state are much inferior to those of a TFT in a developed region. The Strain is caused by the curling, in the curling process, except that the neutral layer (mechanical layer without thickness) does not generate Strain, each layer generates interlayer dislocation Offset due to the curling, the dislocation range is the dislocation region, the dislocation is the root cause of the Strain, the gate is the gate, the GI is the gate insulating layer, the S is the source, the D is the drain, the TFT in the curling state can bear the Strain (the mechanical structure design is usually compressive Strain, and the minority condition can be tensile Strain), when the TFT is in the Strain state, the carrier mobility of the TFT can correspondingly change, the mobility of the bearing the compressive Strain (negative Strain) is improved, and the conduction performance of the TFT is improved (the mobility is in positive correlation with the conduction performance of the TFT). On the contrary, the mobility of the TFT communication bearing the tensile strain is reduced, and the conduction performance is deteriorated. The TFT with curl and non-curl do not have the same electrical characteristics, so that current variations occur.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.
An embodiment of the present application provides a flexible display panel, as shown in fig. 4, the flexible display panel includes: a display area 1, a plurality of GOA circuits 2 located at the periphery of the display area 1, and a plurality of switching devices 3 located at least on one side of the display area 1.
The control terminal of each switching device 3 is electrically connected to a shift register signal input terminal of one GOA circuit 2.
A first terminal of each switching device 3 is electrically connected to a first voltage terminal.
The second terminal of each switching device 3 outputs a signal to be detected.
The display signal output end of each GOA circuit 2 is electrically connected to the shift register signal input end of the next GOA circuit 2, and the shift register signal input end of the first GOA circuit 2 is configured to receive the first electrical signal.
The plurality of switching devices 3 of the embodiment of the application are arranged on at least one side of the display area 1 of the display panel, and the plurality of GOA circuits 2 are GOA circuits 2 on the existing display panel, so that the whole curling detection structure is completely integrated on the display panel, and the process and the structure are relatively simple.
A plurality of switching device 3 of this application embodiment utilize current GOA circuit 2's the aversion to register signal to control a plurality of switching device 3 and open in proper order and switch on, then wait to detect that the signal judges last switching device 3 that is in the crimp state according to detecting switching device 3 output, can realize the real-time supervision to the crimp length of flexible display panel, a plurality of switching device 3 switch on under the control of GOA circuit 2's the aversion register signal, wait to detect that the signal judges crimp length through switching device 3 output, ambient temperature can not disturb and wait to detect the signal, it is more accurate to detect crimp length.
According to the embodiment of the application, the influence of stress and interlayer dislocation generated in the curling process on the electrical characteristics of the switch devices 3 is utilized, and meanwhile, based on the shift register function of the GOA circuit 2 of the existing display panel, a plurality of switch devices 3 and corresponding connecting signal lines are only required to be arranged on the display panel, so that the space and the signal source of the display panel are saved. Moreover, with the development trend of light and thin integration of the flexible display panel, the curling detection is integrated on the panel by using the existing process, so that the device cost is reduced, and the light and thin requirements can be met.
Alternatively, a plurality of switching devices 3 may be disposed on one side of the display area 1, and the curling length of one side is detected in real time through the switching devices 3 on one side, and the curling length of the other side is the same, that is, the curling length of the whole flexible display panel can be obtained. Meanwhile, a plurality of switching devices 3 may be disposed on both sides of the display region 1, so that the curling length of both sides may be detected in real time, and the curling length of the entire display panel may be detected more accurately.
Alternatively, a plurality of switching devices 3 are uniformly and parallel arranged at the side of the display area 1.
Alternatively, referring to fig. 5, timing signals of directions in which the CLK signal line and the CLB signal line are output. The first clock signal input terminal and the second clock signal input terminal of each GOA circuit 2 are respectively configured to receive the second electrical signal and the third electrical signal, where the second electrical signal and the third electrical signal are inverted timing signals. As shown in fig. 4, the first clock signal input terminal CLK and the second clock signal input terminal CLB of each GOA circuit 2 are electrically connected to the same CLK signal line and the same CLB signal line, respectively. The CLK signal line and the CLB signal line are used to transmit the second electrical signal and the third electrical signal.
Optionally, the second terminal of each switching device 3 is electrically connected to the same signal output terminal, and is used for outputting the signal to be detected. Because the switching devices 3 are sequentially conducted to send the signals to be detected, a plurality of switching devices 3 can be electrically connected with one signal output end, wiring areas are saved, and arrangement of signal lines is reduced.
Alternatively, the signal to be detected is a current signal, the second terminal of each switching device 3 may be electrically connected to a current detector, and the second terminal of each switching device 3 is connected to a constant voltage. And the current detector sends the acquired current signal to be detected to the curl detection device for carrying out curl detection on the flexible display panel. Meanwhile, the curl detection device may directly acquire the current signal of the switching device 3.
Alternatively, the number of the GOA circuits 2 is twice that of the switching devices 3; the control end of each switching device 3 is electrically connected with the shift register signal input end of one GOA circuit 2 and the display signal output end of the other GOA circuit 2; one GOA circuit 2 is a previous GOA circuit 2 of another GOA circuit 2. Each switching device 3 may correspond to two GOA circuits 2, and when a shift register signal is output from one GOA circuit 2 to the next GOA circuit 2, the corresponding switching device 3 is turned on, and a signal to be detected is transmitted. In practical applications, one switching device 3 may correspond to one or more GOA circuits 2, and may be set according to the requirement of the detection accuracy of the actual curl length.
Optionally, each switching device 3 is a thin film transistor, which may be an N-type TFT or a P-type TFT; the control end of the thin film transistor is a grid electrode of the thin film transistor; if the first end of the thin film transistor is the source electrode of the thin film transistor, the second end of the thin film transistor is the drain electrode of the thin film transistor. If the first end of the thin film transistor is the drain electrode of the thin film transistor, the second end of the thin film transistor is the source electrode of the thin film transistor. When each switching device 3 is an N-type TFT, the voltage of the drain is higher than that of the source; when each switching device 3 is a P-type TFT, the voltage of the source is higher than that of the drain.
In the curling process of the flexible display panel, the display area 1, namely the AA area and the pixel TFT are also affected by strain, so that the circuit performance is changed. However, on the one hand, the pixels in the area are curled and do not participate in display, so that even the abnormal condition of the TFT does not affect the display content. In addition, the TFTs of different pixel rows in the pixel circuit of the AA area are not connected in series, so that the TFT performance change of the curled area does not influence the TFT operation of the non-curled area. In addition, the edge curling detection TFT can effectively improve the signal-to-noise ratio of the detection of the flexible display panel by increasing the size of the TFT and setting the TFT to the layer height with larger strain through the cushion layer.
As an example, referring to fig. 4, taking one side of the display area, i.e. the AA area as an example, n GOA circuits 2 are disposed outside the display area 1, where n is an integer not less than 1. The display signal output end g (n) of the GOA circuit 2 is electrically connected to the display area 1 through a signal line, and is used for displaying in the display area 1. The shift register signal Input end, i.e. the IN end, of the GOA circuit 2 is configured to receive a shift register signal sent by the previous GOA circuit 2, and the IN end of the first GOA circuit 2 directly inputs the shift register signal Input. Referring to fig. 6, a timing chart of several GOA circuits 2 arranged in front inputting shift register signals in sequence for scanning is shown. The first terminal of each switching device 3 is connected to the first voltage terminal via the same signal line, and receives the input voltage VhighEach switching device 3 being secondThe terminals are electrically connected to a current detector for obtaining the current I at the second terminal of each switching device 3roll. Each switching device 3 is a P-type TFT, and the voltage of the source is higher than that of the drain.
It can be understood by those skilled in the art that when each of the transistors is a P-type TFT or the first terminal and the second terminal of each of the transistors are different poles of the TFT, the electrical connection manner of each element in the pixel driving circuit provided in the embodiments of the present application can be adaptively adjusted, and the adaptively adjusted electrical connection manner still belongs to the protection scope of the embodiments of the present application.
With reference to fig. 6 and 7, in the embodiment of the present application, the scanning function of the shift register signal of the GOA circuit 2 is used to drive the switching devices 3 to sequentially turn on, the curled TFT is scanned to have a degraded conduction effect, and the current is low, as shown in a timing diagram of the curled state of the TFT in the figure, there may be several lines of transition TFTs in the unfolded state, which is not shown in the figure, and the TFT is scanned to be normally conducted, i.e., the unfolded state of the TFT in the figure, so that the length ranges of the curled state and the unfolded state can be located according to the signal to be detected of the TFT, i.e., the current signal.
Based on the same inventive concept, an embodiment of the present application provides a method for detecting a curl of a flexible display panel, which is applied to the flexible display panel of the first aspect, and as shown in fig. 8, the method for detecting a curl of a flexible display panel includes the following steps:
and S801, acquiring signals to be detected sequentially output by the second ends of the plurality of switching devices 3.
Specifically, the switching devices 3 are sequentially turned on by using the shift register signal of the GOA circuit 2, so that the signals to be detected of the switching devices 3 can be sequentially obtained.
S802, when the current and the next two adjacent signals to be detected jump, the switching device 3 corresponding to the jump is determined.
Specifically, when the detection signal jumps, it is indicated that the position of the corresponding switching device 3 is the boundary between the curling state and the unfolding state, and the position of the boundary between the curling state and the unfolding state can be determined by determining the switching device 3 corresponding to the jump, so as to determine the curling length conveniently.
Optionally, if the signal to be detected of the previous switching device 3 is a first preset electrical signal that the previous switching device 3 is in a curled state, and the signal to be detected of the next switching device 3 is a second preset electrical signal that the next switching device 3 is in a spread state, it is determined that the two adjacent signals to be detected before and after jump; determining a corresponding switch device 3 when the signal to be detected jumps according to the detected time when the signal to be detected jumps and preset information, wherein the preset information comprises: the interval duration of the signal to be detected of each switching device 3 or the detected time corresponds to each switching device 3.
And S803, determining the curling length of the flexible display panel according to the corresponding switch device 3.
Optionally, if the signal to be detected of the previous switching device 3 is a first preset electrical signal of a preset first electrical signal that the previous switching device 3 is in a curled state, and the signal to be detected of the next switching device 3 is a second preset electrical signal that the next switching device 3 is in an unfolded state, the previous switching device 3 is used as the last switching device 3 in the curled state; the first preset electric signal is a signal to be detected in a curling state, and the second preset electric signal is a signal to be detected in a spreading state;
determining the number of the switching devices 3 in the range of the crimp length according to the last switching device 3 in the crimp state;
the curling length of the flexible display panel is determined according to the number of the switching devices 3 and the preset distance between two adjacent switching devices 3.
In practical applications, the curling length of the flexible display panel is determined, and the unfolding length of the flexible display panel can be determined according to the total length of the flexible display panel.
Optionally, referring to fig. 9, the method for detecting the curling of the flexible display panel includes the following steps:
and S901, acquiring signals to be detected which are sequentially output by the second ends of the plurality of switching devices 3.
Specifically, the specific method in this step is the same as the specific method in step S801, and is not described herein again.
And S902, if the signal to be detected of the previous switch device 3 is a first preset electrical signal when the previous switch device 3 is in a curled state, and the signal to be detected of the next switch device 3 is a second preset electrical signal when the next switch device 3 is in an unfolded state, determining that the front and the back adjacent signals to be detected jump.
In practical application, the first preset electrical signal is a signal to be detected in a curled state, and the second preset electrical signal is a signal to be detected in an unfolded state. That is, if the signal to be detected is the first preset electrical signal in the curled state, it indicates that the switching device 3 is in the curled state; if the signal to be detected is the second preset electrical signal in the unfolded state, it indicates that the switch device 3 is in the unfolded state.
Specifically, the first preset electrical signal may be an electrical signal value or an electrical signal range, and the first preset electrical signal may be an electrical signal value or an electrical signal range. When the detected signal of the front and rear switching devices 3 fluctuates, it indicates that the state of the switching device 3 changes in this part.
And S903, determining the corresponding switch device 3 when the signal to be detected jumps according to the detected time and preset information when the signal to be detected jumps. The preset information includes: the interval duration or the detected time of the signal to be detected of each switching device 3 corresponds to each switching device 3.
In practical applications, the detected time when the signal to be detected jumps can be determined by locating the time point of the first switching device 3 and the time point when the signal to be detected jumps.
Specifically, when the preset information is the interval duration of the signal to be detected of each switching device 3, the number of the switching devices 3 can be calculated according to the total detected time, and the switching device 3 is the last switching device 3 in the rolling state.
When the preset information is the correspondence between the detected time and each switching device 3, which switching device 3 is the last switching device 3 in the rolled state can be directly determined according to the detected time.
And S904, determining the number of the switching devices 3 in the crimp length range according to the corresponding switching devices 3.
In practical applications, each switching device 3 may be numbered sequentially, and after the last switching device 3 in the rolling state is determined, the number of the switching devices 3 is determined according to the number of the switching device 3.
And S905, determining the curling length of the flexible display panel according to the number of the switching devices 3 and the preset distance between two adjacent switching devices 3.
Specifically, the pitches of two adjacent switching devices 3 are the same, and the rolling length of the flexible display panel can be obtained directly by multiplying the number of the switching devices 3 by the unit pitch of the two adjacent switching devices 3.
Based on the same inventive concept, an embodiment of the present application provides a curl detection apparatus for a flexible display panel, which is applied to the flexible display panel of the first aspect, and referring to fig. 10, the curl detection apparatus 10 for a flexible display panel includes: an acquisition module 101, a first determination module 102 and a second determination module 103.
The obtaining module 101 is configured to obtain signals to be detected sequentially output by the second ends of the multiple switching devices 3.
The first determining module 102 is configured to determine the switching device 3 corresponding to a jump when two adjacent signals to be detected jump.
The second determining module 103 is configured to determine a curl length of the flexible display panel according to the corresponding switching device 3.
Optionally, the first determining module 102 is specifically configured to: if the signal to be detected of the previous switching device 3 is a first preset electrical signal when the previous switching device 3 is in a curled state, and the signal to be detected of the next switching device 3 is a second preset electrical signal when the next switching device 3 is in a spread state, determining that the front and back adjacent signals to be detected jump; determining a corresponding switch device 3 when the signal to be detected jumps according to the detected time when the signal to be detected jumps and preset information, wherein the preset information comprises: the interval duration or the detected time of the signal to be detected of each switching device 3 corresponds to each switching device 3.
The second determining module 103 is specifically configured to: determining the number of switching devices 3 within the crimp length range according to the corresponding switching device 3; the curling length of the flexible display panel is determined according to the number of the switching devices 3 and the preset distance between two adjacent switching devices 3.
Based on the same inventive concept, the present application provides a rollable display device, as shown in fig. 11, the rollable display device 11 includes: a processor 111; and a memory 112 configured to store machine readable instructions, which when executed by the processor 111, implement the curl detection method of the flexible display panel of the embodiments of the present application.
Optionally, processor 111 and memory 112 are electrically coupled, such as by bus 113.
Alternatively, the structure of the rollable display device 11 does not constitute a limitation on the embodiments of the present application.
The Processor 111 may be a CPU (Central Processing Unit), a general-purpose Processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 2001 may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs and microprocessors, and the like.
The Memory 112 may be a ROM (Read-Only Memory) or other type of static storage device that can store static information and instructions, a RAM (random access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read-Only Memory), a CD-ROM (Compact Disc Read-Only Memory) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these.
Optionally, the memory 112 is used for storing application program codes for executing the embodiments of the present application, and is controlled by the processor 111 to execute. The processor 111 is configured to execute the application program codes stored in the memory 112 to implement any one of the curl detection methods for the flexible display panel provided by the embodiments of the present application.
It will be appreciated by those skilled in the art that the rollable display device 11 provided by the embodiments of the present application may be specially designed and manufactured for the required purposes, or may comprise a known device in a general purpose computer. These devices have stored therein computer programs that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., computer) readable medium or in any type of medium suitable for storing electronic instructions and respectively coupled to a bus.
It should be noted that the rollable display device 11 may be a mobile phone with a folding function, a tablet computer, a wearable device, an in-vehicle device, an Augmented Reality (AR)/Virtual Reality (VR) device, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), and other electronic devices, and the embodiment of the present application does not set any limitation to the specific type of the rollable display device.
Based on the same inventive concept, embodiments of the present application provide a computer storage medium for storing computer instructions, which when executed on a computer, implement the method for detecting curling of a flexible display panel according to the second aspect.
Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. A flexible display panel, comprising: the display device comprises a display area, a plurality of GOA circuits positioned at the periphery of the display area and a plurality of switching devices positioned at least one side of the display area;
the control end of each switching device is electrically connected with the shift register signal input end of one GOA circuit;
a first end of each switching device is electrically connected with a first voltage end;
the second end of each switching device outputs a signal to be detected;
and the display signal output end of each GOA circuit is electrically connected with the shift register signal input end of the next GOA circuit, and the shift register signal input end of the first GOA circuit is used for receiving a first electric signal.
2. The flexible display panel of claim 1, wherein the first clock input and the second clock input of each GOA circuit are configured to receive a second electrical signal and a third electrical signal, respectively, and wherein the second electrical signal and the third electrical signal are inverted timing signals.
3. The flexible display panel according to claim 1, wherein the second terminal of each of the switching devices is electrically connected to the same signal output terminal for outputting a signal to be detected.
4. The flexible display panel according to claim 1, wherein the number of the GOA circuits is twice that of the switching devices;
the control end of each switching device is electrically connected with the shift register signal input end of one GOA circuit and the display signal output end of the other GOA circuit;
the one GOA circuit is a previous GOA circuit of the other GOA circuit.
5. A method for detecting the curl of a flexible display panel, applied to the flexible display panel according to any one of claims 1 to 4, comprising the steps of:
acquiring signals to be detected which are sequentially output by second ends of a plurality of switching devices;
when the current and the latter two adjacent signals to be detected jump, determining a switching device corresponding to the jump;
determining a curl length of the flexible display panel according to the corresponding switching device.
6. The method for detecting the curling of the flexible display panel according to claim 5, wherein the determining the switching device corresponding to the jump when the jump occurs in the two adjacent signals to be detected comprises:
if the signal to be detected of the previous switch device is a first preset electrical signal when the previous switch device is in a curled state, and the signal to be detected of the next switch device is a second preset electrical signal when the next switch device is in a spread state, determining that the front and back adjacent signals to be detected jump;
determining a switch device corresponding to the signal to be detected when the signal to be detected jumps according to the detected time when the signal to be detected jumps and preset information, wherein the preset information comprises: the interval duration of the signal to be detected of each switching device or the detected time corresponds to each switching device.
7. The method of claim 6, wherein the determining a curl length of the flexible display panel according to the corresponding switching device comprises:
determining the number of the switching devices in the crimp length range according to the corresponding switching devices;
and determining the curling length of the flexible display panel according to the number of the switching devices and the preset distance between two adjacent switching devices.
8. A curl detection device for a flexible display panel, applied to the flexible display panel according to any one of claims 1 to 4, comprising:
the acquisition module is used for acquiring signals to be detected which are sequentially output by the second ends of the plurality of switching devices;
the first determining module is used for determining a switching device corresponding to the jump when the front and the back adjacent signals to be detected jump;
and the second determining module is used for determining the curling length of the flexible display panel according to the corresponding switching device.
9. A rollable display device, comprising: a processor; and
a memory configured to store machine readable instructions which, when executed by the processor, implement a method of curl detection of a flexible display panel as claimed in any one of claims 5 to 7.
10. A computer storage medium for storing computer instructions for implementing a method of curl detection of a flexible display panel as claimed in any one of claims 5 to 7 when the computer instructions are run on a computer.
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| CN202010010823.8A CN111081187B (en) | 2020-01-06 | 2020-01-06 | Flexible display panel, curling detection method and device and display equipment |
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| TWI667644B (en) * | 2013-07-19 | 2019-08-01 | 日商半導體能源研究所股份有限公司 | Data processing device |
| KR101693088B1 (en) * | 2014-12-31 | 2017-01-04 | 엘지디스플레이 주식회사 | Display panel having a scan driver and method of operating the same |
| CN105448259B (en) * | 2015-12-25 | 2018-03-30 | 上海中航光电子有限公司 | Gate drivers and display panel |
| KR102536791B1 (en) * | 2016-07-29 | 2023-05-26 | 엘지디스플레이 주식회사 | Rollable flexible display device |
| TWI619103B (en) * | 2016-09-23 | 2018-03-21 | 友達光電股份有限公司 | Flexible Display |
| CN107248376B (en) * | 2017-06-28 | 2019-11-22 | 武汉天马微电子有限公司 | A kind of flexible display apparatus and its control method |
| KR102332710B1 (en) * | 2017-07-31 | 2021-11-29 | 엘지디스플레이 주식회사 | Rollable display device |
| CN107256692B (en) * | 2017-08-11 | 2019-08-02 | 京东方科技集团股份有限公司 | Resolution update device, shift register, flexible display panels, display equipment |
| CN107331304B (en) * | 2017-08-18 | 2019-11-22 | 深圳市华星光电半导体显示技术有限公司 | The ameliorative way and improvement device of flexible display and its bending display exception |
| CN108511494B (en) * | 2018-03-30 | 2020-08-25 | 京东方科技集团股份有限公司 | Flexible display panel and bending detection method thereof |
| CN110164340B (en) * | 2018-12-06 | 2021-01-26 | 京东方科技集团股份有限公司 | Compensation device, display screen, display device and compensation method |
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