CN113793565B - Display panel, display device and compensation control method of display device - Google Patents
Display panel, display device and compensation control method of display device Download PDFInfo
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- CN113793565B CN113793565B CN202111085208.4A CN202111085208A CN113793565B CN 113793565 B CN113793565 B CN 113793565B CN 202111085208 A CN202111085208 A CN 202111085208A CN 113793565 B CN113793565 B CN 113793565B
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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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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Abstract
The invention provides a display panel, a display device and a compensation control method of the display device. The display panel comprises a first signal wire, a second signal wire, a compensation resistor, a control switch tube and a controller; one of the first signal line and the second signal line is used for being connected with an input end of a direct current power supply, and the other one of the first signal line and the second signal line is used for being connected with a power supply voltage feedback path; the number of the compensation resistors is multiple, and the multiple compensation resistors are connected in series on the first signal line; the control switch tube corresponds to the compensation resistor and is used for controlling the access state of the corresponding compensation resistor; the controller is used for controlling the on and off of the control switch tube. Thus, the embodiment of the invention is beneficial to reducing the lateral stripes with uneven brightness which may appear and is beneficial to improving the display effect.
Description
Technical Field
The present invention relates to the field of display, and in particular, to a display panel, a display device, and a compensation control method for a display device.
Background
The power supply mode of the display panel comprises direct current power supply and alternating current power supply, wherein the display panel applied to the electronic equipment such as a mobile phone and a tablet computer is usually supplied with power through a direct current power supply, and horizontal stripes with uneven brightness can appear in certain application scenes through the display panel supplied with power through the direct current power supply, so that the display effect can be influenced by the phenomenon.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a compensation control method of the display device, and aims to solve the problem that horizontal stripes with uneven brightness affect the display effect.
In a first aspect, an embodiment of the present invention provides a display panel, including a first signal line, a second signal line, a compensation resistor, a control switch tube, and a controller;
one of the first signal line and the second signal line is used for being connected with an input end of a direct current power supply, and the other one of the first signal line and the second signal line is used for being connected with a power supply voltage feedback path;
the number of the compensation resistors is multiple, and the multiple compensation resistors are connected in series on the first signal line;
the control switch tube corresponds to the compensation resistor and is used for controlling the access state of the corresponding compensation resistor;
the controller is used for controlling the on and off of the control switch tube.
In some embodiments, the control switch tube includes a control end, a first end and a second end, the first ends of the control switch tubes are all connected to the second signal line, the second ends of the control switch tubes are all connected to one end of the corresponding control resistor, which is far away from the input end of the first signal line, and the control ends of the control switch tubes are all connected to the controller.
In some embodiments, the controller includes a control chip and a compensation control switch corresponding to the control switch tube, the controller is configured to provide an on signal of the control switch tube, the compensation control switch is disposed between the control chip and a control end of the corresponding control switch tube, and the compensation control switch is configured to control transmission of the on signal.
In some embodiments, the display panel includes a substrate and a driving circuit layer disposed on the substrate, the driving circuit layer including a semiconductor layer;
the compensation resistor comprises a plurality of compensation resistor patterns, and the compensation resistor patterns and the semiconductor layer are arranged in the same layer and in the same material.
In some embodiments, at least some of the compensation resistor patterns have different aspect ratios to form the compensation resistors having different resistance values.
In some embodiments, the driving circuit layer further includes a source drain metal layer, the compensation resistors are connected in series through a conductive connection line, and the conductive connection line and the source drain metal layer are arranged in the same layer and made of the same material.
In a second aspect, an embodiment of the present invention provides a display device, including the display panel described in any one of the first aspects.
In a third aspect, an embodiment of the present invention provides a compensation control method for a display device, which is applied to the display device in the second aspect, and includes the following steps:
acquiring a display state of the display panel when the load of the display panel is cyclically switched between a first load and a second load;
under the condition that the display state of the display device is abnormal, controlling the number of the accessed compensation resistors to be gradually increased;
and under the condition that the display state of the display device is normal, acquiring the access state of the compensation resistor as a compensation result for the display panel.
In some embodiments, the controller includes a control chip and a compensation control switch corresponding to the control switch, and the obtaining the connection state of the compensation resistor as the compensation result for the display panel includes:
acquiring the switch state of each compensation control switch;
and writing the switch state of the compensation control switch into the control chip as the initial state of the compensation control switch when the display panel is started.
In some embodiments, the display period of the display panel includes a display period sequentially corresponding to each frame image and a blanking period located before each of the display periods;
after the obtaining the connection state of the compensation resistor as the compensation result for the display panel, the method further includes:
compensating the display panel in the blanking period according to the compensation result in a case where the display panel displays an image.
In some embodiments, the obtaining the display state of the display panel includes:
collecting a display image of the display panel by using an image collecting device;
under the condition that the display image comprises bright and dark stripes conforming to a preset mode, marking the display state of the display panel as abnormal;
and under the condition that the display image does not comprise bright and dark stripes conforming to a preset mode, marking the display state of the display panel as normal.
The display panel of the technical scheme of the embodiment of the invention comprises a first signal wire, a second signal wire, a compensation resistor, a control switch tube and a controller; one of the first signal line and the second signal line is used for being connected with an input end of a direct current power supply, and the other one of the first signal line and the second signal line is used for being connected with a power supply voltage feedback path; the number of the compensation resistors is multiple, and the multiple compensation resistors are connected on the first signal line in series; the control switch tube corresponds to the compensation resistor and is used for controlling the access state of the corresponding compensation resistor, the control switch tube comprises a control end, a first end and a second end, the first end of the control switch tube is connected with the second signal line, the second end of the control switch tube is connected with one end, far away from the input end of the first signal line, of the corresponding control resistor, and the control end of the control switch tube is connected with the controller; the controller is used for controlling the on and off of the control switch tube. Therefore, the compensation resistor is arranged between the input end of the direct current power supply and the power supply voltage feedback path, the number of the compensation resistors connected into the circuit is adjusted by controlling the switching tube, the compensation load can be provided through the compensation resistor, the fluctuation of the power supply voltage of the display panel is reduced when the load changes, the possible transverse stripes with uneven brightness are reduced, and the display effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic view of a display device;
FIG. 2 is a schematic diagram of voltage feedback signals for high-speed switching of different loads of a display panel;
FIG. 3 is a diagram illustrating abnormal display status during high-load switching of a display screen;
FIG. 4 is a schematic diagram of a display panel compensation circuit according to an embodiment of the present invention;
FIG. 5 is a partial cross-sectional view of a display panel in accordance with an embodiment of the present invention;
FIG. 6 is a flowchart of a compensation control method of the display device according to the present invention;
FIG. 7 is a schematic diagram of a compensation control signal according to an embodiment of the present invention;
FIG. 8 is a flowchart illustrating a compensation control method according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Without conflict, the embodiments and features of the embodiments described below may be combined with each other. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, when an OLED (organic light emitting diode) display panel is applied to a display device such as a mobile phone or a tablet computer, power is supplied by a switching power supply in a manner of providing a stable dc output voltage. The display device mainly includes a control circuit board, which in this embodiment may be a Main Flexible Printed Circuit (MFPC), the MFPC is connected to the display panel through a COF (Chip On Flex or Chip On Film), and a control Chip (IC) may be disposed On the COF as required.
When the output voltage fluctuates due to external interference, generally, these display devices are provided with a control loop, and the control loop adjusts the switching power supply according to the voltage fed back by the display panel to compensate the input voltage of the display panel, so as to input a stable dc voltage to the display panel.
In the process of implementing the technical solution of the present application, the inventor finds that the switching power supply control loop is used as a closed-loop control system, and the energy supply to the load is distributed as required, but the specification and technical requirements of the display panel during use may change, for example, brightness difference, refresh rate difference, fast switching of pictures, excessive high and low gray levels of pictures, and the like, and when these conditions occur, the load of the display panel may suddenly change.
As shown in fig. 2, when the brightness or the refresh rate is suddenly increased, the load of the display panel is also suddenly increased, which means that the voltage demand is suddenly increased and the output voltage drops instantly. When the load variation generated by the rapid switching of the display screen image is smaller than the lower limit of the bearable load variation range of the switching power supply control loop, the phase margin of the voltage feedback signal is larger, the feedback voltage drop is too large, namely the emergency response speed is slower, and when the voltage regulation cannot be completed in the blanking period of the display panel, the writing abnormality of the grid voltage of the display screen driving circuit can be easily caused. As shown in fig. 3, in this case, a bright and dark stripe phenomenon may occur in at least a partial area of the display region of the display panel.
With reference to fig. 2 and fig. 3, when the load variation generated by fast switching of the display screen is much larger than the upper limit of the bearable load variation range of the switching power supply control loop, the concealment period is shorter at a high refresh rate, at this time, the phase margin of the voltage feedback signal is smaller, the overshoot phenomenon of the feedback signal is easily generated, the signal is agitated, the amplitude gain of the signal is increased, and the duration is longer, so that the output voltage of the switching power supply is severely jittered, the gate voltage writing of the display screen driving circuit is abnormal, and the bright and dark cross striations are also formed in the display area when the blanking period cannot include the backoff period.
As shown in fig. 2, when the load variation generated by the fast switching of the display screen matches the bearable load variation range of the switching power supply control loop, the phase margin of the voltage feedback signal is appropriate, the feedback voltage drops slightly, the overshoot is slight, the influence on the gate voltage writing of the display screen driving circuit is not large, and the display effect of the display panel is normal.
The invention provides a display panel.
As shown in fig. 4, in some embodiments, the display panel includes a first signal line, a second signal line, a compensation resistor, a control switch tube, and a controller.
In the present embodiment, only the first signal line is connected to the input terminal of the dc power supply, and the second signal line is connected to the power supply voltage feedback path for illustration. Referring to the display panel shown in fig. 1, the dc power source is a switching power source of the display panel, and the power voltage feedback path refers to the control loop for providing voltage feedback.
In this embodiment, referring to fig. 4, a plurality of compensation resistors R1, R2 \8230 \ 8230 \ 8230: \ TN and compensation resistors R1, R2 \ 823030 \ TN and R2 \8230 \ RN correspond to each other, for example, in this embodiment, the control switch tube T1 corresponds to the compensation resistor R1 and is used for controlling the intervention state of the compensation resistor R1, the control switch tube T2 corresponds to the compensation resistor R2 and is used for controlling the intervention state of the compensation resistor R2, and so on.
In this embodiment, the control switch tube is used for controlling the access state of the corresponding compensation resistor, the control switch tube includes a control end, a first end and a second end, the first end of the control switch tube is connected with the second signal line, the second end of the control switch tube is connected with the end of the corresponding control resistor far away from the input end of the first signal line, the control end of the control switch tube is connected with the controller, and the controller is used for controlling the on and off of the control switch tube.
For example, under the control of the controller, the control switch tube T1 corresponding to the compensation resistor R1 is turned on, and the remaining control switch tubes are turned off, so that the compensation resistor R1 is connected to the circuit, and the remaining compensation resistors are not connected to the circuit; when the control switch tube T2 corresponding to the compensation resistor R2 is opened and the other control switch tubes are closed, the compensation resistor R1 and the compensation resistor R2 are connected into the circuit, and the other compensation resistors are not connected into the circuit, at this time, the total resistance is R1 plus R2; when the control switch tube TN corresponding to the compensation resistor RN is turned on and the other control switch tubes are turned off, the compensation resistor R1 to the compensation resistor RN are all connected into the circuit, and the total resistance is the sum Sigma Ri, i =1, 2, 3 \8230, N. By analogy, the quantity of the compensation resistors in the access circuit can be controlled by controlling the on and off of the control switch tube, so that the resistance value of the compensation resistors in the access circuit is controlled.
Therefore, the compensation resistor is arranged between the input end of the direct current power supply and the power supply voltage feedback path, the number of the compensation resistors connected into the circuit is adjusted by controlling the switching tube, the compensation load can be provided through the compensation resistor, the fluctuation of the power supply voltage of the display panel is reduced when the load changes, the possible transverse stripes with uneven brightness are reduced, and the display effect is improved.
As shown in fig. 5, in some embodiments, the display panel includes a substrate 501 and a driving circuit layer disposed on the substrate 501, the driving circuit layer includes a semiconductor layer 502, the semiconductor layer 502 is mainly used for forming an active layer of a Thin Film Transistor (TFT), the compensation resistor includes a plurality of compensation resistor patterns, the compensation resistor patterns are disposed in the same material as the semiconductor layer 502, and the semiconductor layer 502 is generally formed of a semiconductor material, which may be polysilicon, for example. Semiconductor materials generally have relatively high resistivity and are suitable resistive materials. By adjusting the size of the pattern of the compensation resistor, compensation resistors with different resistance values can be formed. Meanwhile, only the shape of the mask needs to be adjusted, and the process and the step flow do not need to be changed, so that the manufacturing cost is favorably controlled.
In some embodiments, at least some of the compensation resistor patterns have different aspect ratios to form compensation resistors having different resistance values. Thus, the embodiment can provide the compensation resistors with different resistance values, thereby being beneficial to improving the compensation effect.
With continued reference to fig. 5, in some embodiments, the driving circuit layer further includes a source/drain metal layer 504, and the compensation resistors are connected in series through a conductive connection line, and the conductive connection line and the source/drain metal layer 504 are disposed in the same layer and material.
It should be understood that the semiconductor layer 502 of the display panel is used to form an active layer of the TFT, the semiconductor layer 502 is usually covered by an insulating protection layer 503, and the source and drain metal layers 504 are connected to the active layer through a via hole penetrating through the insulating protection layer 503. In this embodiment, the conductive connection line for connecting the compensation resistor and the source/drain metal layer 504 are formed of the same material on the same layer, and thus, when the via hole for connecting the source/drain metal layer 504 and the active layer is formed in the insulating protective layer 503, the via hole for connecting the conductive connection line and the compensation resistor pattern is formed at the same time. Subsequently, other film layers, such as the planarization layer 505, etc., are fabricated with further reference to the related art, and are not further defined and described herein.
In some embodiments, the controller includes a control chip and a compensation control switch corresponding to the control switch tube, the controller is configured to provide an on signal of the control switch tube, the compensation control switch is disposed between the control chip and a control end of the corresponding control switch tube, and the compensation control switch is configured to control transmission of the on signal.
In this embodiment, the controller continuously provides an opening signal for controlling the light-emitting tube, and the compensation control switches RS1, RS2 \8230 \ 8230and RSN are used for controlling transmission of the opening signal, which can be understood that when one compensation control switch is opened, the opening signal can be transmitted to the control end of the corresponding control switch tube, so as to control the opening of the control switch tube, and thus the corresponding compensation resistor is connected to the circuit. When one compensation control switch is closed, the opening signal cannot be transmitted to the control end of the corresponding control switch tube, so that the control switch tube is closed.
An embodiment of the present invention provides a display device including the display panel of any one of the above.
Since the display device of this embodiment includes all technical solutions of the display panel embodiments described above, at least all technical effects described above can be achieved, and details are not described here.
The invention also provides a compensation control method of the display device, which is applied to the display device.
As shown in fig. 6, in one embodiment, the method comprises the steps of:
step 601: and acquiring the display state of the display panel when the load of the display panel is switched cyclically between the first load and the second load.
In this embodiment, the display panel of the display device is controlled to switch between the first load and the second load, where the first load and the second load are loads with different sizes, and the difference should be relatively large to simulate the load variation of the display panel.
In the load switching process, the display state of the display panel is collected, and specifically, whether the transverse stripes with different brightness exist or not is collected.
In some embodiments, the step 601 specifically includes:
collecting a display image of the display panel by using an image collecting device;
under the condition that the display image comprises bright and dark stripes which accord with a preset mode, marking the display state of the display panel as abnormal;
and under the condition that the display image does not comprise the bright and dark stripes conforming to the preset mode, marking the display state of the display panel as normal.
In this embodiment, the image capturing device of the camera may be used to capture a display image of the display panel, and further, the existing or improved image recognition algorithm may be combined to recognize whether there is a bright and dark stripe on the display panel that meets a preset pattern, where the preset pattern may be determined through a predetermined experiment, for example, by controlling load switching of the display panel to enable the display panel to generate the bright and dark stripe, and further, determining the preset pattern according to the bright and dark stripe, and then recognizing the display state according to the determined bright and dark stripe of the preset pattern, so as to ensure that the recognized display state abnormality is caused by load change.
Step 602: and under the condition that the display state of the display device is abnormal, the number of the compensation resistors which are controlled to be connected in is gradually increased.
Referring to fig. 2, if the display state of the display panel is abnormal, it indicates that the switching power supply control loop is overshot, and at this time, the number of the compensation resistors that are controlled to be connected is gradually increased, for example, the control switch tube T1 may be controlled to be opened first, and the remaining control switch tubes are closed, and if the display state is still abnormal, the control switch tube T2 is controlled to be opened, and the remaining control switch tubes are controlled to be closed, and so on.
As the number of compensation resistors incorporated into the control circuit increases, the phase margin delay increases.
Step 603: and under the condition that the display state of the display device is normal, acquiring the access state of the compensation resistor as a compensation result for the display panel.
When the display state of the display device is detected to be normal, the phase margin is appropriate, at this time, the compensation at the display screen end is completed, and at this time, the compensation state of the display panel is used as a compensation result, where the compensation state specifically refers to the number of compensation resistors in the access circuit.
Based on the current compensation state, the display panel can have a proper phase margin, so that the stability of the direct-current voltage provided by the switching voltage is improved, the possibility of occurrence of bright and dark stripes caused by load change is reduced, and the display effect is improved.
In some embodiments, the controller includes a control chip and a compensation control switch corresponding to the control switch tube, and the obtaining the connection state of the compensation resistor as the compensation result for the display panel includes:
acquiring the switching state of each compensation control switch;
and writing the switch state of the compensation control switch into the control chip as the initial state of the compensation control switch when the display panel is started.
In this embodiment, after the compensation state is determined, the on-off state of the compensation control switch is kept unchanged, and the on-off state of the compensation control switch is written into the control chip, so that when the electronic device is subsequently operated, for example, restarted, the display panel is still compensated according to the compensation state, the possibility of occurrence of bright and dark stripes is reduced, and the display effect is improved.
In some embodiments, the display period of the display panel includes a display period corresponding to each frame image in turn and a blanking period preceding each of the display periods;
after the obtaining the connection state of the compensation resistor as the compensation result for the display panel, the method further includes:
compensating the display panel in the blanking period according to the compensation result in a case where the display panel displays an image.
In this embodiment, when the control terminal is at a high level, the control switch tube is in an open circuit state between the first terminal and the second terminal, and when the control terminal is at a low level, the control switch tube is in a closed circuit state between the first terminal and the second terminal.
In implementation, the control switch tube T1 corresponding to the compensation resistor R1 closest to the input end of the first signal line may be in a pass state by default, and then the control switch tubes may be controlled to be turned on and off by further referring to the above process.
Referring to fig. 2 and fig. 7, when the high-low level transition occurs, the transition should be located in the blanking period, so as to ensure that the compensation adjustment for the display panel is completed in the blanking period, and reduce the possible influence on the display effect.
As shown in fig. 8, the compensation control method of the display device of the present embodiment can be summarized as firstly controlling the display panel of the display device to be rapidly switched between high and low loads in a cycle, and continuously monitoring the display state of the display panel during the switching process.
Meanwhile, a feedback path impedance selection instruction is written in the control chip, and the feedback path impedance selection instruction is specifically used for controlling the display panel to execute the control method in step 602 in the embodiment shown in fig. 6.
When the abnormal display state of the display panel is detected, the number of the compensation resistors of the access circuit is controlled to be gradually increased, and when the normal display state of the display panel is detected, the display panel is compensated according to the compensation result.
In the above process, the detection process of the display state of the display panel may be continuously performed until the compensation of the display panel is completed.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A display panel is characterized by comprising a first signal line, a second signal line, a compensation resistor, a control switch tube and a controller;
one of the first signal line and the second signal line is used for being connected with an input end of a direct current power supply, and the other one of the first signal line and the second signal line is used for being connected with a power supply voltage feedback path;
the number of the compensation resistors is multiple, and the multiple compensation resistors are connected in series on the first signal line;
the control switch tube corresponds to the compensation resistor and is used for controlling the access state of the corresponding compensation resistor;
the controller is used for controlling the on and off of the control switch tube;
the display panel comprises a substrate and a driving circuit layer arranged on the substrate, wherein the driving circuit layer comprises a semiconductor layer;
the compensation resistor comprises a plurality of compensation resistor patterns, and the compensation resistor patterns and the semiconductor layer are arranged in the same layer and in the same material.
2. The display panel according to claim 1, wherein the control switch tube comprises a control end, a first end and a second end, the first end of the control switch tube is connected to the second signal line, the second end of the control switch tube is connected to the end of the corresponding control resistor away from the input end of the first signal line, and the control end of the control switch tube is connected to the controller.
3. The display panel according to claim 1, wherein the controller comprises a control chip and a compensation control switch corresponding to the control switch tube, the controller is configured to provide an on signal of the control switch tube, the compensation control switch is disposed between the control chip and a control end of the corresponding control switch tube, and the compensation control switch is configured to control transmission of the on signal.
4. The display panel according to claim 1, wherein at least some of the compensation resistor patterns have different aspect ratios to form the compensation resistors having different resistance values.
5. The display panel according to claim 1, wherein the driving circuit layer further comprises a source drain metal layer, the compensation resistors are connected in series through a conductive connection line, and the conductive connection line and the source drain metal layer are arranged in the same layer and made of the same material.
6. A display device characterized by comprising the display panel according to any one of claims 1 to 5.
7. A compensation control method of a display device, applied to the display device according to claim 6, comprising the steps of:
acquiring a display state of the display panel when the load of the display panel is cyclically switched between a first load and a second load;
under the condition that the display state of the display device is abnormal, controlling the number of the accessed compensation resistors to gradually increase;
and under the condition that the display state of the display device is normal, acquiring the access state of the compensation resistor as a compensation result for the display panel.
8. The compensation control method of the display device according to claim 7, wherein the controller comprises a control chip and a compensation control switch corresponding to the control switch tube, and the obtaining the connection state of the compensation resistor as the compensation result for the display panel comprises:
acquiring the switching state of each compensation control switch;
and writing the switch state of the compensation control switch into the control chip as the initial state of the compensation control switch when the display panel is started.
9. The compensation control method of a display device according to claim 7 or 8, wherein the display period of the display panel includes a display period corresponding in sequence to each frame image and a blanking period located before each of the display periods;
after the obtaining the connection state of the compensation resistor as the compensation result for the display panel, the method further includes:
compensating the display panel in the blanking period according to the compensation result in a case where the display panel displays an image.
10. The compensation control method of the display device according to claim 7 or 8, wherein the acquiring the display state of the display panel includes:
collecting a display image of the display panel by using an image collecting device;
under the condition that the display image comprises bright and dark stripes which accord with a preset mode, marking the display state of the display panel as abnormal;
and under the condition that the display image does not comprise bright and dark stripes conforming to a preset mode, marking the display state of the display panel as normal.
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| JP4493359B2 (en) * | 2004-02-05 | 2010-06-30 | 東北パイオニア株式会社 | Self-luminous display module and driving method thereof |
| JP2012078415A (en) * | 2010-09-30 | 2012-04-19 | Hitachi Displays Ltd | Display device |
| CN107093412B (en) * | 2017-06-29 | 2019-06-04 | 京东方科技集团股份有限公司 | Display base plate, display device and pixel electrode driving method |
| CN107610636B (en) * | 2017-10-30 | 2021-02-02 | 武汉天马微电子有限公司 | Display panel and display device |
| CN107799082A (en) * | 2017-11-16 | 2018-03-13 | 深圳市华星光电技术有限公司 | A kind of common electric voltage VCOM control circuits and corresponding liquid crystal display device |
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