WO2023226870A1

WO2023226870A1 - Display panel, electronic device, and display calibration method for electronic device

Info

Publication number: WO2023226870A1
Application number: PCT/CN2023/095020
Authority: WO
Inventors: 苏子鹏
Original assignee: 维沃移动通信有限公司
Priority date: 2022-05-25
Filing date: 2023-05-18
Publication date: 2023-11-30
Also published as: CN114863852A

Abstract

Disclosed in the present application are a display panel, an electronic device, and a display calibration method for an electronic device. The display panel comprises: a chip; a first signal transmission line; a detection line; a thin-film transistor; and a control line, wherein a signal output end of the chip is electrically connected to an input end of the first signal transmission line, an output end of the first signal transmission line is electrically connected to a first end of the thin-film transistor, the chip is electrically connected to a control end of the thin-film transistor by means of the control line, and a second end of the thin film-transistor is electrically connected to a signal receiving end of the chip by means of the detection line.

Description

Display panels, electronic devices and display calibration methods for electronic devices

Cross-references to related applications

This application claims priority from Chinese Patent Application No. 202210578727.2 filed in China on May 25, 2022, the entire content of which is incorporated herein by reference.

Technical field

The present application relates to the technical field of electronic products, and specifically relates to a display panel, electronic equipment and a display calibration method of the electronic equipment.

Background technique

For some existing electronic devices, as the use time increases, display distortion may occur. For example, for folding screen electronic devices, as the number of folds increases, the impedance of the conductive lines at the folded position will be higher. This leads to display distortion. It can be seen that existing electronic equipment has the problem of display distortion.

Contents of the invention

This application provides a display panel, electronic equipment and a display calibration method for electronic equipment, which can alleviate the problem of display distortion in existing electronic equipment.

In a first aspect, embodiments of the present application provide a display panel, including: a chip, a first signal transmission line, a detection line, a thin film transistor, and a control line. The signal output end of the chip and the input end of the first signal transmission line Electrically connected, the output end of the first signal transmission line is electrically connected to the first end of the thin film transistor, the chip is electrically connected to the control end of the thin film transistor through the control line, and the second end of the thin film transistor is electrically connected. The terminal is electrically connected to the signal receiving terminal of the chip through the detection line.

In a second aspect, an embodiment of the present application provides an electronic device, including: the display panel described in the first aspect.

In a third aspect, embodiments of the present application provide a display calibration method for electronic equipment, which is applied to the electronic equipment described in the second aspect, including:

Send a test signal to the first signal transmission line based on the signal output end of the chip;

The signal receiving end based on the chip receives the first feedback signal input by the detection line;

Generate target calibration parameters based on the test signal and the first feedback signal;

Update the calibration parameters of the display panel to the target calibration parameters.

In the embodiment of the present application, when the display panel has a problem of display distortion, the chip in the display panel can control the control end of the thin film transistor through the control line, so that the thin film transistor conducts the output end of the first signal transmission line and Test line. In this way, the signal output by the output end of the first signal transmission line can be transmitted back to the signal receiving end of the chip through the detection line. In this way, the chip can determine based on the signal output by the signal output end and the return signal received by the signal receiving end. The loss value of the signal transmitted in the first signal transmission line can then compensate the signal output by the signal output terminal according to the loss value, thereby avoiding the display distortion of the display panel caused by the loss of the display signal in the signal transmission signal. question.

Description of the drawings

Figure 1 is one of the structural schematic diagrams of a display panel provided by an embodiment of the present application;

Figure 2 is one of the partial enlarged views of the display panel provided in the embodiment of the present application;

Figure 3 is the second partial enlarged view of the display panel provided by the embodiment of the present application;

Figure 4 is a second structural schematic diagram of a display panel provided by an embodiment of the present application;

Figure 5 is the third partial enlarged view of the display panel provided by the embodiment of the present application;

Figure 6 is a cross-sectional view of the A-A section in Figure 5;

Figure 7 is a sectional view of the B-B section in Figure 5;

Figure 8 is the fourth partial enlarged view of the display panel provided by the embodiment of the present application;

Figure 9 is a cross-sectional view of the C-C section in Figure 8;

Figure 10 is a cross-sectional view of the D-D section in Figure 8;

Figure 11 is the third structural schematic diagram of the display panel provided by the embodiment of the present application;

Figure 12 is a partial enlarged view of E in Figure 11;

Figure 13 is a schematic diagram of the connection between the pixel unit and the first signal transmission line provided by the embodiment of the present application;

Figure 14 is a flow chart of a display calibration method for an electronic device provided by an embodiment of the present application;

Figure 15 is an illustration of pixels displayed on the display end surface of the display panel provided by the embodiment of the present application. One of the intentions;

Figure 16 is a second schematic diagram of pixels displayed on the display end surface of the display panel provided by the embodiment of the present application;

FIG. 17 is a third schematic diagram of pixels displayed on the display end surface of the display panel provided by the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the figures so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in orders other than those illustrated or described herein, and that "first," "second," etc. are distinguished Objects are usually of one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

The display panel, electronic device and display method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios.

Referring to FIGS. 1 to 13 , a display panel provided by an embodiment of the present application includes: a chip 110 , a first signal transmission line 120 , a detection line 130 , a thin film transistor 140 and a control line 150 . The signal output of the chip 110 The end of the first signal transmission line 120 is electrically connected to the input end of the first signal transmission line 120 , the output end of the first signal transmission line 120 is electrically connected to the first end of the thin film transistor 140 , and the chip 110 communicates with the control line 150 through the control line 150 . The control end of the thin film transistor 140 is electrically connected, and the second end of the thin film transistor 140 is electrically connected to the signal receiving end of the chip 110 through the detection line 130 .

It can be understood that, after receiving the display signal, the first signal transmission line 120 can transmit the display signal to the pixel unit 160 at each display position of the display panel, and through the pixel unit 160 displays the content indicated by the display signal. The first signal transmission line 120 may be a Vdata line in the display panel, and the Vdata line is a data signal wire of each pixel.

The detection line 130 may use the display signal flowing out of the first signal transmission line 120 as a first feedback signal, and transmit the first feedback signal back to the chip 110 . Since the first feedback signal is a signal after the display signal flows through the first signal transmission line 120, when the impedance in the first signal transmission line 120 is large, the display signal flows through the third signal transmission line 120. After a signal transmission line 120, there will be greater attenuation. In this way, by transmitting the first feedback signal back to the chip 110 , the chip 110 can calculate the difference between the display signal and the first feedback signal, thereby determining the loss value of the display signal in the first signal transmission line 120 , and the subsequent display signal is compensated according to the loss value, so as to avoid the problem of display distortion caused by the loss of the display signal in the first signal transmission line 120 .

In one embodiment of the present application, the chip 110 can obtain the voltage A at the input end of the first signal transmission line 120 during the process of transmitting the display signal to the first signal transmission line 120, and then, through the detection line 130 obtains the voltage B at the output end of the first signal transmission line 120 , where A-B is the loss voltage C in the first signal transmission line 120 . The chip 110 can perform algorithmic superposition compensation on the loss voltage C and the original factory calibration value D of each channel to generate new calibration data E, and update and write the new calibration data E into the calibrator. Subsequently, the chip 110 performs signal display based on the new calibration data E. .

When the display panel is applied to a folding screen electronic device, since the pixel units 160 need to be arranged at various positions in the display area of the display panel, the first signal transmission lines 120 for transmitting display signals need to be arranged at intervals throughout the entire display area. Since during the folding process of the electronic device, the first signal transmission line 120 passing through the folding position will also be folded. Therefore, as the number of times the electronic device is folded increases, the impedance of the first signal transmission line 120 will continue to increase, and thus As a result, the loss of the display signal in the first signal transmission line 120 will continue to increase, which may cause display distortion of the display panel.

Based on this, the embodiment of the present application calculates the loss value of the display signal in the first signal transmission line 120 and compensates the subsequent display signal according to the loss value to avoid the loss of the display signal in the first signal transmission line 120. This causes display distortion.

It can be understood that the problem of the display distortion occurring in the above-mentioned display panel may be the display distortion caused by the increase in the impedance of the first signal transmission line 120 . Wherein, the first signal transmission line The reason for the increase in impedance 120 may be that the first signal transmission line 120 is bent too many times. In addition, the increase in impedance may also be caused by other reasons. For example, it may be due to the line of the first signal transmission line 120 Impedance increases due to aging.

The above-mentioned display panel can calculate the loss value in real time during the display process, and compensate the signal displayed at the next time based on the loss value calculated at the previous time. In addition, the display panel may also calculate the loss value according to the calibration instruction input by the user, generate calibration data of the signal based on the calculated loss value, and update and write the new calibration data into the calibrator.

In this embodiment, when the display panel has a problem of display distortion, the chip 110 in the display panel can control the control end of the thin film transistor 140 through the control line 150 so that the thin film transistor 140 turns on the first signal transmission line 120 The output terminal and the detection line 130. In this way, the signal output by the output end of the first signal transmission line 120 can be transmitted back to the signal receiving end of the chip 110 through the detection line 130. In this way, the chip 110 can according to the signal output by the signal output end and the response received by the signal receiving end. The signal is transmitted to determine the loss value of the signal transmitted in the first signal transmission line 120, and then the signal output by the signal output end can be compensated according to the loss value, thereby avoiding the loss of the display signal in the signal transmission signal. Display panel display distortion problem.

Optionally, please refer to FIG. 1 , the thin film transistor 140 and the chip 110 are respectively close to opposite ends of the display panel, the display panel includes a display area and a non-display area, and the first signal transmission line 120 is located at The display area, the detection line 130, the thin film transistor 140 and the control line 150 are located in the non-display area.

In this embodiment, by placing the thin film transistor 140 and the chip 110 close to the opposite ends of the display panel, and making the first signal transmission line 120 located in the display area, the detection line 130 and the The thin film transistor 140 and the control line 150 are located in the non-display area. The signal in the first signal transmission line 120 enters the detection line 130 after passing through the entire display area. In this way, after receiving the feedback signal input from the first signal transmission line 120, the chip 110 can, based on the feedback signal, The signal loss of the first signal transmission line 120 in the entire display area is determined, and then the signals at each display position in the display area can be compensated based on the signal loss, which is beneficial to improving the signal compensation effect. Arranging the detection line 130, the thin film transistor 140 and the control line 150 in the non-display area is also beneficial to reducing the space occupation of the display area and improving the light transmittance of the display area.

Optionally, the display panel is a bendable display panel, and the display panel includes a bending area, The first signal transmission line 120 passes through the bending area, and the thin film transistor 140 and the chip 110 are respectively located on opposite sides of the bending area.

In this embodiment, since the thin film transistor 140 and the chip 110 are located on opposite sides of the bending area, the signal in the first signal transmission line 120 enters the detection line after passing through the bending area. 130. In this way, after receiving the feedback signal input from the first signal transmission line 120, the chip 110 can determine the signal loss at the first signal transmission line 120 based on the feedback signal, and further can determine the signal loss based on the signal loss. Compensating the signal in the bending area will help improve the effect of signal compensation.

Optionally, the chip 110 is configured to send a test signal to the first signal transmission line 120 through the signal output terminal in the detection mode, and receive the first feedback input from the detection line 130 through the signal receiving terminal. signal; the chip 110 is also used to calibrate the display signal output by the signal output terminal based on the first feedback signal in the display mode.

The display panel may include a detection mode and a display mode. In the detection mode, the thin film transistor 140 is in a closed state to connect the output end of the first signal transmission line 120 and the detection line 130. At this time, , the signal at the output end of the first signal transmission line 120 can enter the detection line 130 through the thin film transistor 140 . In the display mode, the thin film transistor 140 is in an off state. At this time, the output end of the first signal transmission line 120 is relatively disconnected from the detection line 130, and the signal at the output end of the first signal transmission line 120 cannot Enter the detection line 130.

Specifically, when the display effect of the display panel is poor, for example, when there is obvious display distortion, the display panel can be controlled to enter the detection mode. At this time, the chip 110 sends a signal to the first signal transmission line 120 The test signal, after flowing through the first signal transmission line 120 , enters the detection line 130 through the output end of the first signal transmission line 120 , and then flows into the signal receiving end of the chip 110 . Wherein, the signal flowing out from the output end of the first signal transmission line 120 may be used as the first feedback signal. In this way, the loss of the test signal in the first feedback signal can be determined by comparing the relative magnitudes of the test signal and the first feedback signal. And when the display panel is in the display mode, the display signal output by the signal output end is calibrated based on the loss.

Optionally, the display panel further includes a diode 310, and a second portion of the thin film transistor 140 The terminal is electrically connected to the anode of the diode 310 , and the cathode of the diode 310 is electrically connected to the detection line 130 .

Referring to FIG. 1 , the display panel may include n first signal transmission lines 120 , the first signal transmission lines 120 are arranged along the length direction of the display end surface of the display panel, and the n first signal transmission lines 120 are arranged along the length direction of the display end surface of the display panel. The display end surfaces are arranged at equal intervals.

It can be understood that the output end of the chip 110 is electrically connected to the input end of the plurality of first signal transmission lines 120 respectively, and each first signal transmission line 120 is electrically connected to the detection line 130 through a thin film transistor 140 .

Wherein, the diode 310 can be a thin film diode, and the thin film diode only conducts in one direction. Since the second end of the thin film transistor 140 is electrically connected to the anode of the diode 310, the cathode of the diode 310 is electrically connected to the The detection line 130 is electrically connected, and a signal can be transmitted from the thin film transistor 140 to the detection line 130 , but cannot be transmitted from the detection line 130 to the thin film transistor 140 .

In this embodiment, the diode 310 is disposed between the thin film transistor 140 and the detection line 130. In this way, when the thin film transistor 140 is in a non-unidirectional conduction structure, the first feedback signal transmitted to the detection line 130 is returned. to a certain first signal transmission circuit.

Optionally, please refer to Figure 6. The display panel includes a substrate, a semiconductor layer 250, a first metal layer and a second metal layer disposed on the substrate. The first metal layer and the second metal layer There is an insulation layer between them;

The control terminal of the thin film transistor 140 is located on the first metal layer, and the control line 150 is located on the first metal layer;

The first end of the thin film transistor 140 is a source electrode located on the second metal layer;

The second end of the thin film transistor 140 is a drain, located on the second metal layer; the first end and the second end of the thin film transistor 140 are respectively connected to the semiconductor layer 250;

The first signal transmission line 120 and the detection line 130 are located on the second metal layer.

In this embodiment, since the first signal transmission line 120 and the detection line 130 are respectively located on the second metal layer, that is, the first signal transmission line 120 and the detection line 130 share the same metal layer. The first signal transmission line 120 and the detection line 130 are respectively provided with metal layers, which is beneficial to reducing the overall volume of the display panel.

Optionally, the first signal transmission line 120 includes at least two output terminals, and the at least two The output ends are arranged at intervals along the length direction of the first signal transmission line 120;

The display panel further includes at least two detection lines 130 and at least two thin film transistors 140. Each detection line 130 is connected to the output end of the first signal transmission line 120 through one of the thin film transistors 140, and each An output end of the first signal transmission line 120 is electrically connected to the signal receiving end through the thin film transistor 140 and the detection line 130 .

Please refer to FIG. 11 . In this embodiment, the first signal transmission line 120 includes at least two output terminals, and each output terminal passes through the thin film transistor 140 , the detection line 130 and the signal receiving line respectively. terminal electrical connection. In this way, in the detection mode, the chip 110 can obtain the first feedback signals of the output ends of the first signal transmission line 120 at different positions based on different detection lines 130, and further can detect the first feedback signals based on the first feedback signals at different positions. The display signals output by the output terminals at different positions of the first signal transmission line 120 are compensated, which is helpful to further improve the compensation effect of the display signals.

Optionally, the display panel includes a plurality of scan lines arranged along the row direction and a plurality of first signal transmission lines 120 arranged along the column direction, and the plurality of scan lines and the plurality of first signal transmission lines 120 intersect to form multiple pixel units 160;

The output end of the first signal transmission line 120 , the thin film transistor 140 and the detection line 130 are provided in at least two of the pixel units 160 .

Referring to FIG. 11 , the display panel includes a plurality of pixel units 160 , one pixel unit 160 corresponds to one output terminal, and the input terminal of the pixel unit 160 is electrically connected to the corresponding output terminal.

It can be understood that the display signal output from any output end of the first signal transmission line 120 can be transmitted to the corresponding pixel unit 160 or to the corresponding detection line 130. In this way, the output can be ensured. The display signal output by the output terminal can be displayed through the pixel unit 160. At the same time, it can also be ensured that in the detection mode, the display signal output by the output terminal can be transmitted back to the chip 110 through the corresponding detection line 130.

In this embodiment, the chip 110 can obtain the first feedback signal returned by each detection line 130 row by row or column by column, and calculate each row or each row based on the obtained first feedback signal returned by each detection line 130 . The compensation value of the column is calculated, and based on the calculated compensation value, the display signal of each row or column is compensated respectively. In this way, the settings can be targeted according to the loss amount in different areas of the screen. Set the corresponding compensation value to further improve the compensation effect on the display signal.

Optionally, in the detection mode, the detection line 130 inputs a first feedback signal to the signal receiving end; in the display mode, the detection line 130 provides an initialization voltage to the pixel unit 160;

And/or, the control terminal of the thin film transistor 140 is electrically connected to the scan driver chip or the scan driver circuit 151 .

Specifically, please refer to FIGS. 11 and 12 , the pixel unit 160 includes an initialization voltage line Vinit, and the initialization voltage line Vinit is multiplexed as the detection line 130 in the detection mode. In the detection mode, the thin film transistor 140 is closed, and the thin film transistor 140 conducts the initialization voltage line Vinit and the output terminal. At this time, the signal output by the output terminal can enter the initialization voltage line Vinit through the thin film transistor 140, and the signal entering the initialization voltage line Vinit is transmitted back to the chip 110 as the first feedback signal, so that The display signal output by the corresponding output terminal is calibrated on the chip 110 .

Correspondingly, in the display mode, the thin film transistor 140 is turned off. At this time, the detection line 130 provides an initialization voltage to the pixel unit 160 so that the pixel unit 160 can normally display the received Display signal.

The above-mentioned scan driver chip may be the driver chip 110 of the scan line, and the scan driver chip is electrically connected to the plurality of scan lines respectively. In one embodiment of the present application, the control end of the thin film transistor 140 can be electrically connected to a scan driver chip, so as to control the conduction state of the thin film transistor 140 based on the scan driver chip.

In addition, please refer to FIG. 12. In another embodiment of the present disclosure, the control end of the thin film transistor 140 is electrically connected to the scan driving circuit 151. In this way, the conduction of the thin film transistor 140 can be controlled through the scan driving circuit 151. communication status. The scan driving circuit 151 can be electrically connected to the chip 110 , so that a control signal can be output through the chip 110 and driven by the scan driving circuit 151 to control the conductive state of the thin film transistor 140 Take control.

Optionally, as shown in Figure 3, the display panel further includes a second signal transmission line 170. The display panel is bent along a bending line, and the extension direction of the first signal transmission line 120 is consistent with the extension of the bending line. directions cross, the two ends of the second signal transmission line 170 are electrically connected to the first signal transmission line 120 respectively, and the two ends of the second signal transmission line 170 are respectively located on the bending line. both sides.

Wherein, the first signal transmission line 120 may include a first connection point and a second connection point, the input end of the second signal transmission line 170 is electrically connected to the first connection point, and the output of the second signal transmission line 170 The end is electrically connected to the second connection point. When the display panel is applied to a folding screen electronic device, as the number of times the electronic device is folded increases, there may be a risk of breakage at the bending position of the first signal transmission line 120. When the first signal transmission line 120 breaks, the breakage position reaches the first The output ends of the signal transmission line 120 will not be able to receive display signals normally, resulting in the part being unable to display normally.

Based on this, in the embodiment of the present application, two ends of the second signal transmission line 170 are connected to the first connection point and the second connection point respectively. Since the bending position of the first signal transmission line 120 is located between the first connection point and the second connection point, when the bending position of the first signal transmission line 120 breaks, the first signal transmission line 120 breaks. The line between the input end and the bending position can normally receive the display signal. At the same time, when the display signal is transmitted to the first connection point, it can be transmitted to the second connection point through the second signal transmission line 170. In this way, the display signal is transmitted to the second connection point. The display signal to the second connection point may be transmitted to various positions between the bending position and the output end of the first signal transmission line 120 . In this way, it can be ensured that when the bending position of the first signal transmission line 120 is broken, the display panel can still display normally.

It can be understood that each first signal transmission line 120 across the bending line can be connected to a second signal transmission line 170 respectively. And when the first signal transmission line 120 includes at least two bending positions, each bending position of the first signal transmission line 120 can be connected to a corresponding second signal transmission line 170 . For example, please refer to FIG. 1 . Since the electronic device to which the display panel belongs has two folding lines, at this time, the first signal transmission line 120 includes two bending positions. Therefore, the two bending positions of the first signal transmission line 120 can be Each position is connected to a second signal transmission line 170 .

In this embodiment, the second signal transmission line 170 forms a double trace of the first signal transmission line 120 . In addition to setting double wiring for the signal transmission line, double wiring can also be set for other lines in the electronic device. For example, double wiring can be set for other lines such as touch screen wiring and drive circuit wiring. For example, please refer to FIG. 4 , the display panel further includes a first target line 190 and a second target line 200 . The second target line 200 forms a double trace of the first target line 190 . Line 190 can be touch screen wiring, drive circuit wiring, signal transmission any one of the lines.

Referring to FIG. 6 , in one embodiment of the present application, the display panel further includes a screen cover 210 , an optical adhesive layer 220 , a touch layer 230 , an encapsulation layer 240 , a light-emitting layer 180 and a third metal layer. The second signal transmission line 170 is located on the third metal layer. That is, the first signal transmission line and the second signal transmission line respectively have different conductive layers.

Figure 10, in another embodiment of the present application, the second signal transmission line 170 includes a first section 172 and a second section 171. The second section 171 is located on the first metal layer, and the first section 171 is located on the first metal layer. Segment 172 is located in the second metal layer. That is, the first segment 172 of the second signal transmission line 170 shares a metal layer with the first signal transmission line, and the second segment 171 of the second signal transmission line 170 shares a metal layer with the control line 150. In this way, There is no need to separately provide the third metal layer of the second signal transmission line, which is beneficial to reducing the overall volume of the display panel.

Optionally, the first signal transmission line 120 is located on a first plane, the second signal transmission is located on a second plane, the first plane and the second plane are respectively parallel to the display end surface of the display panel, and The first plane and the second plane are different planes, and the orthographic projection of the first signal transmission line 120 in the second plane is relatively offset from the position of the second signal transmission line 170 .

Referring to FIG. 3 , the second signal transmission line 170 and its corresponding first signal transmission line 120 are relatively staggered in a direction parallel to the plane where the display end surface is located. At the same time, the second signal transmission line 170 and its corresponding first signal transmission line 120 are relatively staggered. The position of a signal transmission line 120 perpendicular to the direction of the display end surface is also relatively staggered. In this way, during the folding process of the electronic device, the stress states of the first signal transmission line 120 and the second signal transmission line 170 are different, thereby avoiding the problem that the first signal transmission line 120 and the second signal transmission line 170 break at the same time.

In addition, the first signal transmission line 120 serves as the source of the thin film transistor 140, and its material can be various metals or metal oxides and other conductive materials, such as titanium Ti, aluminum Al, molybdenum Mo and other metals; metal oxides such as indium tin oxide In ₂ O ₃ , SnO ₂ etc. The control line 150 and the detection line 130 are respectively made of conductive materials.

Another embodiment of the present application provides an electronic device, which includes the display panel described in the above embodiment.

In this embodiment, since the electronic device includes the display panel, the electronic device can achieve all the beneficial effects of the display panel. To avoid duplication, they will not be repeated here. narrate.

Referring to Figure 14, another embodiment of the present application provides a display calibration method for electronic equipment, which is applied to the electronic equipment described in the above embodiment, including:

Step S1401: Send a test signal to the first signal transmission line 120 based on the signal output terminal of the chip 110;

Step S1402: The signal receiving end of the chip 110 receives the first feedback signal input from the detection line 130;

Step S1403: Generate target calibration parameters based on the test signal and the first feedback signal;

Step S1404: Update the calibration parameters of the display panel to the target calibration parameters.

The display calibration method provided by this embodiment is a method corresponding to the display panel in the above embodiment. Its specific implementation is the same as the above embodiment and has the same beneficial effects. To avoid duplication, it will not be described again.

In this embodiment, the test signal is sent to the first signal transmission line 120 through the signal output end of the chip 110, and the first feedback signal input from the detection line 130 is received by the signal receiving end, and then, based on the test signal and the The first feedback signal generates a target calibration parameter, and updates the calibration parameter of the display panel to the target calibration parameter. In this way, the display panel can subsequently calibrate the output display signal based on the target calibration parameter.

Optionally, before sending a test signal to the first signal transmission line 120 based on the signal output end of the chip 110, the method further includes:

When the calibration signal is received, a first control signal is sent to the thin film transistor 140 based on the control terminal of the chip 110 , wherein the first control signal is used to control the thin film transistor 140 to close.

Specifically, the user can input the calibration signal when the electronic device displays an abnormality. When receiving the calibration signal, the electronic device sends a first control signal to the thin film transistor 140 based on the control terminal of the chip 110 to control the thin film transistor 140 to close. Then, the above steps S1401 to S1404 may be performed based on the chip 110 to complete the calibration process of the display signal.

Optionally, the test signal includes the voltage at the input end of the first signal transmission line 120 , the first feedback signal includes the voltage at the output end of the first signal transmission line 120 , and the first feedback signal is based on The test signal and the first feedback signal generate target calibration parameters, including:

Calculate the difference between the voltage at the input terminal and the voltage at the output terminal;

The initial calibration parameters of the display panel are compensated based on the difference to obtain the target calibration parameters.

It can be understood that in the display mode, the chip 110 can use the target calibration parameter to compensate for the display signal required to be output, for example, the intensity of the display signal required to be output can be amplified by a certain value, where , the amplified value is the same as the parameter value of the target calibration parameter.

In this embodiment, the loss voltage of the test signal during the transmission process of the first signal transmission line 120 is calculated, and the target calibration parameter is determined based on the loss voltage, so that the output calibration parameter can be subsequently calculated based on the target calibration parameter. Display signal for compensation.

Optionally, the display panel includes a first pixel unit 290 and a second pixel unit 300 that are adjacently arranged. Each of the first pixel unit 290 and the second pixel unit 300 includes a first sub-pixel 330, a second sub-pixel 330, and a second pixel unit 300. The sub-pixel 340 and the third sub-pixel 350. The colors of the first sub-pixel 330, the second sub-pixel 340 and the third sub-pixel 350 are different from each other. The first sub-pixel 330 and the third sub-pixel 350 have different colors. The second sub-pixel 340 and the third sub-pixel 350 are each provided with an output end of the first signal transmission line 120, the thin film transistor 140 and the detection line 130 to respectively adjust the first sub-pixel 330 and the detection line 130. The respective target calibration parameters of the second sub-pixel 340 and the third sub-pixel 350;

The method also includes:

When the first sub-pixel 330 in the first pixel unit 290 is in a dark abnormal display state, the target calibration parameter corresponding to the first sub-pixel 330 in the second pixel unit 300 is adjusted to increase the The display brightness of the first sub-pixel 330 in the two-pixel unit 300;

and / or

When the first sub-pixel 330 in the first pixel unit 290 is in a dark abnormal display state, by adjusting the second sub-pixel 340 and/or the third sub-pixel 350 in the second pixel unit 300. Target calibration parameters to increase the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the second pixel unit 300;

and / or

When the first sub-pixel 330 in the first pixel unit 290 is in a dark abnormal display state, by adjusting the second sub-pixel 340 and/or the third sub-pixel 350 in the first pixel unit 290 Corresponding target calibration parameters are used to increase the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the first pixel unit 290.

Wherein, the first sub-pixel 330, the second sub-pixel 340 and the third sub-pixel 350 may be three sub-pixels of R, G and B respectively. That is, each pixel unit 160 is composed of three sub-pixels of R, G, and B.

Referring to FIG. 15 , each pixel unit 160 includes a group of adjacent first sub-pixels 330 , second sub-pixels 340 and third sub-pixels 350 through reasonable circuit arrangement.

Referring to FIGS. 16 to 17 , in one embodiment of the present application, when the first sub-pixel 330 of the first pixel unit 290 is in an abnormal display state of dark state, by adjusting the The target calibration parameter corresponding to the first sub-pixel 330 is used to increase the display brightness of the first sub-pixel 330 in the second pixel unit 300. At this time, the first sub-pixel 330 and the first pixel in the second pixel unit 300 The second sub-pixel 340 and the third sub-pixel 350 in the unit 290 point-synthesize the image required to be output by the first pixel unit 290 to ensure that when there are abnormal sub-pixels in the first pixel unit 290, It can also be displayed normally.

In another embodiment of the present application, when the first sub-pixel 330 in the first pixel unit 290 is in an abnormal display state of dark state, the second sub-pixel 340 in the second pixel unit 300 can also be adjusted. and/or the target calibration parameter corresponding to the third sub-pixel 350 to increase the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the second pixel unit 300. In this embodiment, the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the second pixel unit 300 adjacent to the first pixel unit 290 is increased to compensate for the first pixel unit 290 The first sub-pixel 330 with insufficient medium brightness ensures normal display even when there is an abnormal sub-pixel in the first pixel unit 290 .

In another embodiment of the present application, when the first sub-pixel 330 in the first pixel unit 290 is in an abnormal display state of dark state, by adjusting the second sub-pixel 340 and/or the second sub-pixel in the first pixel unit 290 Or the target calibration parameter corresponding to the third sub-pixel 350 to increase the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the first pixel unit 290. In this embodiment, the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the first pixel unit 290 is increased to compensate for the insufficient brightness of the first sub-pixel in the first pixel unit 290 330, thereby ensuring that even if there are abnormal sub-pixels in the first pixel unit 290, normal display can be achieved. Show.

It can be understood that the above-mentioned first sub-pixel 330 may be any one of the three sub-pixels of R, G, and B.

Optionally, when the first sub-pixel 330 in the first pixel unit 290 is in an abnormal display state of dark state, the target calibration parameter corresponding to the first sub-pixel 330 in the second pixel unit 300 is adjusted to increase the brightness. The display brightness of the first sub-pixel 330 in the second pixel unit 300 includes:

When the first sub-pixel 330 in the first pixel unit 290 is in a dark abnormal display state, the second pixel unit 300 is adjusted based on the ratio of the intensity value of the second feedback signal to the intensity value of the test signal. The target calibration parameter corresponding to the first sub-pixel 330 in the second pixel unit 300 to increase the display brightness of the first sub-pixel 330 in the second pixel unit 300;

When the first sub-pixel 330 in the first pixel unit 290 is in a dark abnormal display state, by adjusting the second sub-pixel 340 and/or the third sub-pixel 350 in the second pixel unit 300. Target calibration parameters to increase the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the second pixel unit 300 include:

When the first sub-pixel 330 in the first pixel unit 290 is in a dark abnormal display state, the second pixel unit 300 is adjusted based on the ratio of the intensity value of the second feedback signal to the intensity value of the test signal. Target calibration parameters corresponding to the second sub-pixel 340 and/or the third sub-pixel 350 in the second pixel unit 300 to increase the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the second pixel unit 300 ;

When the first sub-pixel 330 in the first pixel unit 290 is in a dark abnormal display state, by adjusting the second sub-pixel 340 and/or the third sub-pixel 350 in the first pixel unit 290. Target calibration parameters to increase the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the first pixel unit 290 include:

When the first sub-pixel 330 in the first pixel unit 290 is in a dark abnormal display state, the first pixel unit 290 is adjusted based on the ratio of the intensity value of the second feedback signal to the intensity value of the test signal. Target calibration parameters corresponding to the second sub-pixel 340 and/or the third sub-pixel 350 in the first pixel unit 290 to increase the display brightness of the second sub-pixel 340 and/or the third sub-pixel 350 in the first pixel unit 290 ;

The second feedback signal is a feedback signal sent by the detection line 130 in the first sub-pixel 330 of the first pixel unit 290 to the signal receiving end of the chip 110 .

Specifically, the reason why the first sub-pixel 330 in the first pixel unit 290 is in a dark abnormal display state may be that the first signal transmission line 120 connected to the first pixel unit 290 has an increased impedance or is broken. Different impedances or different fracture degrees may cause the first sub-pixel 330 in the first pixel unit 290 to have different display brightness.

Based on this, in the embodiment of the present application, the size of the impedance in the first signal transmission line 120 can be determined by judging the ratio of the intensity value of the second feedback signal and the intensity value of the test signal, or, determine The degree of breakage of the first signal transmission line 120. Furthermore, the degree of enhancement of the brightness of the sub-pixels adjacent to the first sub-pixel 330 in the abnormal display state can be determined based on different impedance values or different degrees of fracture.

For example, when the ratio of the intensity value of the second feedback signal to the intensity value of the test signal is smaller, it means that the degree of fracture is more obvious, or it means that the impedance value is larger. At this time, the target calibration can be increased. parameter. Correspondingly, when the ratio of the intensity value of the second feedback signal to the intensity value of the test signal is larger, it means that the degree of fracture is slighter, or the impedance value is smaller. At this time, the value can be reduced. The target calibration parameters.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations, which are only illustrative and not restrictive. Inspired by this application, those of ordinary skill in the art can make many forms without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims

A display panel, including: a chip, a first signal transmission line, a detection line, a thin film transistor and a control line. The signal output end of the chip is electrically connected to the input end of the first signal transmission line. The output end is electrically connected to the first end of the thin film transistor, the chip is electrically connected to the control end of the thin film transistor through the control line, and the second end of the thin film transistor is electrically connected to the chip through the detection line. The signal receiving end is electrically connected.
The display panel according to claim 1, wherein the thin film transistor and the chip are respectively close to opposite ends of the display panel, the display panel includes a display area and a non-display area, and the first signal transmission line is located at The display area, the detection line, the thin film transistor and the control line are located in the non-display area.
The display panel according to claim 1, wherein the display panel is a bendable display panel, the display panel includes a bending area, the first signal transmission line passes through the bending area, and the thin film transistor and the chip are respectively located on opposite sides of the bending area.
The display panel according to claim 1, wherein the chip is configured to send a test signal to the first signal transmission line through the signal output terminal in the detection mode, and receive the detection line through the signal receiving terminal. The input first feedback signal; the chip is also used to calibrate the display signal output by the signal output terminal based on the first feedback signal in the display mode.
The display panel according to claim 1, wherein the display panel further includes a diode, the second end of the thin film transistor is electrically connected to the anode of the diode, and the cathode of the diode is electrically connected to the detection line.
The display panel according to claim 1, wherein the display panel includes a substrate and a semiconductor layer, a first metal layer and a second metal layer disposed on the substrate, the first metal layer and the second metal layer being disposed on the substrate. There is an insulating layer between the metal layers;

The control terminal of the thin film transistor is located on the first metal layer, and the control line is located on the first metal layer;

The first end of the thin film transistor is a source electrode located on the second metal layer;

The second end of the thin film transistor is a drain and is located on the second metal layer; the first end and the second end of the thin film transistor are respectively connected to the semiconductor layer;

The first signal transmission line and the detection line are located on the second metal layer.
The display panel according to claim 1, wherein the first signal transmission line includes at least two output terminals, and the at least two output terminals are spaced apart along the length direction of the first signal transmission line;

The display panel further includes at least two detection lines and at least two thin film transistors. Each detection line is connected to the output end of the first signal transmission line through one of the thin film transistors. Each of the first signal transmission lines The output end of the signal transmission line is electrically connected to the signal receiving end through the thin film transistor and the detection line.
The display panel of claim 1, comprising a plurality of scan lines arranged along a row direction and a plurality of first signal transmission lines arranged along a column direction, the plurality of scan lines and the plurality of first signal transmission lines Intersect to form multiple pixel units;

The output end of the first signal transmission line, the thin film transistor and the detection line are provided in at least two of the pixel units.
The display panel according to claim 8, wherein

In the detection mode, the detection line inputs the first feedback signal to the signal receiving end; in the display mode, the detection line is the initialization voltage provided by the pixel unit;

and / or

The control end of the thin film transistor is electrically connected to the scan driver chip or scan driver circuit.
The display panel according to claim 1, wherein the display panel further includes a second signal transmission line, the display panel is bent along a bending line, and the extension direction of the first signal transmission line is consistent with the extension of the bending line. The directions are crossed, and the two ends of the second signal transmission line are electrically connected to the first signal transmission line respectively, and the two ends of the second signal transmission line are respectively located on both sides of the bending line.
An electronic device including: the display panel according to any one of claims 1 to 10.
A display calibration method for electronic equipment, applied to the electronic equipment described in claim 11, Among them, include:

Send a test signal to the first signal transmission line based on the signal output end of the chip;

The signal receiving end based on the chip receives the first feedback signal input by the detection line;

Generate target calibration parameters based on the test signal and the first feedback signal;

Update the calibration parameters of the display panel to the target calibration parameters.
The method according to claim 12, wherein before the signal output terminal based on the chip sends a test signal to the first signal transmission line, the method further includes:

When the calibration signal is received, a first control signal is sent to the thin film transistor based on the control terminal of the chip, wherein the first control signal is used to control the closing of the thin film transistor.
The method of claim 12, wherein the test signal includes a voltage at an input end of the first signal transmission line, the first feedback signal includes a voltage at an output end of the first signal transmission line, and the first feedback signal is based on the voltage at the output end of the first signal transmission line. The test signal and the first feedback signal generate target calibration parameters, including:

Calculate the difference between the voltage at the input terminal and the voltage at the output terminal;

The initial calibration parameters of the display panel are compensated based on the difference to obtain the target calibration parameters.
The method of claim 12, wherein the display panel includes a first pixel unit and a second pixel unit adjacently arranged, each of the first pixel unit and the second pixel unit including a first sub-pixel, second sub-pixel and third sub-pixel, the colors of the first sub-pixel, the second sub-pixel and the third sub-pixel are different from each other, the first sub-pixel, the second sub-pixel and The third sub-pixel is provided with an output end of the first signal transmission line, a thin film transistor and the detection line to respectively adjust the first sub-pixel, the second sub-pixel and the third sub-pixel. Respective target calibration parameters;

The method also includes:

When the first sub-pixel in the first pixel unit is in an abnormal display state of dark state, the target calibration parameter corresponding to the first sub-pixel in the second pixel unit is adjusted to increase the brightness in the second pixel unit. The display brightness of the first sub-pixel;

and / or

When the first sub-pixel in the first pixel unit is in an abnormal display state of dark state, the target calibration parameters corresponding to the second sub-pixel and/or the third sub-pixel in the second pixel unit are adjusted to increase the brightness. Increase the display brightness of the second sub-pixel and/or the third sub-pixel in the second pixel unit;

and / or

When the first sub-pixel in the first pixel unit is in an abnormal display state of dark state, the target calibration parameters corresponding to the second sub-pixel and/or the third sub-pixel in the first pixel unit are adjusted to increase the brightness. Increase the display brightness of the second sub-pixel and/or the third sub-pixel in the first pixel unit.
The method according to claim 15, wherein when the first sub-pixel in the first pixel unit is in an abnormal display state of dark state, the target calibration corresponding to the first sub-pixel in the second pixel unit is adjusted. Parameters to increase the display brightness of the first sub-pixel in the second pixel unit include:

When the first sub-pixel in the first pixel unit is in an abnormal display state of dark state, the third sub-pixel in the second pixel unit is adjusted based on the ratio of the intensity value of the second feedback signal to the intensity value of the test signal. A target calibration parameter corresponding to a sub-pixel to increase the display brightness of the first sub-pixel in the second pixel unit;

When the first sub-pixel in the first pixel unit is in an abnormal display state of dark state, the target calibration parameters corresponding to the second sub-pixel and/or the third sub-pixel in the second pixel unit are adjusted to increase the brightness. Increasing the display brightness of the second sub-pixel and/or the third sub-pixel in the second pixel unit includes:

When the first sub-pixel in the first pixel unit is in an abnormal display state of dark state, the third sub-pixel in the second pixel unit is adjusted based on the ratio of the intensity value of the second feedback signal to the intensity value of the test signal. Target calibration parameters corresponding to the second sub-pixel and/or the third sub-pixel to increase the display brightness of the second sub-pixel and/or the third sub-pixel in the second pixel unit;

When the first sub-pixel in the first pixel unit is in an abnormal display state of dark state, the target calibration parameters corresponding to the second sub-pixel and/or the third sub-pixel in the first pixel unit are adjusted to increase the brightness. Increase the display brightness of the second sub-pixel and/or the third sub-pixel in the first pixel unit, including include:

When the first sub-pixel in the first pixel unit is in an abnormal display state of dark state, the first sub-pixel in the first pixel unit is adjusted based on the ratio of the intensity value of the second feedback signal to the intensity value of the test signal. Target calibration parameters corresponding to the second sub-pixel and/or the third sub-pixel to increase the display brightness of the second sub-pixel and/or the third sub-pixel in the first pixel unit;

The second feedback signal is a feedback signal sent by the detection line in the first sub-pixel in the first pixel unit to the signal receiving end of the chip.