Compensation circuit, control chip, and display device

Abstract

The present disclosure provides a compensation circuit 2, a control chip and a display device. The driving circuit 1 includes a first thin film transistor T1, a second thin film transistor T2, an organic light emitting diode OLED and a capacitor C. The compensation circuit 2 includes a third thin film transistor T3 and a detection module 201. The third thin film transistor T3 has a control pole T3a connected to the second pole T2c of the second thin film transistor T2 and a first pole T3b connected to the control pole T2a of the second thin film transistor T2. The detection module 201 is respectively connected to the second pole T3c of the third thin film transistor T3, the scan line Scan and the data line Data. When the detection module 201 receives two adjacent voltage signals output from the second pole T3c of the third thin film transistor T3, it turns off and on respectively. The compensation circuit 2 according to the present disclosure has a simple connection circuit, solves the problem of low luminous efficiency of the OLED panel due to threshold voltage drift in the OLED panel, and ensures the luminous efficiency of the OLED panel.

Description

Technical Field

[0001] This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 9, 2022, with the application number CN202210645866.2 and the invention title "Compensation Circuit, Control Chip and Display Device", and all of its content is incorporated herein by reference. This disclosure relates to the field of display technologies, and specifically, to a compensation circuit, a control chip, and a display device.

Background Art

[0002] Organic Light-Emitting Diode (OLED) displays, as next-generation display devices, have been widely popularized due to advantages such as self-luminescence and high-speed response. Currently, in OLEDs, thin film transistors (TFTs) are often used as important electronic devices. However, there is a problem that the threshold voltage drifts due to long-term gate bias in TFTs. Also, since the emission luminance of OLEDs is determined by the voltage of the TFTs, the drift of the TFT threshold voltage reduces the emission luminance of OLEDs and affects the service life of OLEDs.

Summary of the Invention

Problems to be Solved by the Invention

[0003] One objective of this disclosure is to provide a compensation circuit, a control chip, and a display device to guarantee the light-emitting efficiency of an OLED panel.

Means for Solving the Problems

[0004] The first aspect of the embodiments of this disclosure is a compensation circuit used in a driving circuit, wherein the driving circuit includes a first thin film transistor, a second thin film transistor, an organic light-emitting diode, and a capacitor, the control electrode of the first thin film transistor is connected to a scanning line, the first electrode is connected to a data line, and the second electrode is connected to the control electrode of the second thin film transistor, The second thin film transistor has its second pole connected to the positive electrode of the organic light emitting diode, and its first pole connected to a power supply terminal. The organic light emitting diode has its negative electrode grounded. One end of the capacitor is connected to the second pole of the first thin film transistor, and the other end is connected to the negative electrode of the organic light emitting diode. The compensation circuit includes a third thin film transistor and a detection module. The third thin film transistor has its control pole connected to the second pole of the second thin film transistor, and its first pole connected to the control pole of the second thin film transistor. The detection module is connected to the second pole of the third thin film transistor, the scanning line, and the data line respectively. When the detection module receives two adjacent voltage signals output from the second pole of the third thin film transistor, it turns off and on respectively.

[0005] A second aspect of the embodiments of the present disclosure provides a control chip connected to a scanning line in a display panel for inputting a scanning signal to the scanning line, and the control chip includes the compensation circuit described in any one of the above aspects.

[0006] A third aspect of the embodiments of the present disclosure provides a display device including the control chip described in any one of the above aspects.

Advantages of the Invention

[0007] According to the compensation circuit according to the embodiment of the present disclosure, in the process that the scanning line inputs a high-level signal to the driving circuit twice, when the scanning line in the driving circuit receives the first high-level signal, the first thin-film transistor is turned on, the data line charges the capacitor and applies a voltage to the control pole of the second thin-film transistor, so that the second thin-film transistor is turned on. After the second thin-film transistor is turned on, the organic light-emitting diode emits light, and the second pole of the second thin-film transistor applies a voltage (i.e., VDD) to the control pole of the third thin-film transistor to turn on the third thin-film transistor. At this time, the first pole of the third thin-film transistor collects the gate voltage Vth of the control pole of the third thin-film transistor, and transmits the gate voltage Vth to the detection module through the second pole of the third thin-film transistor. After the detection module receives the voltage signal (i.e., the gate voltage Vth) transmitted from the second pole of the third thin-film transistor, the detection module is turned on, and thereby the gate voltage Vth is transmitted to the data line. The compensation circuit has a simple connection circuit and guarantees the light-emitting efficiency of the OLED panel.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0009] In the following, for the sake of easy explanation rather than limitation, specific details such as specific system configurations and technologies are described so that the embodiments of the present disclosure can be thoroughly understood. It is obvious to those skilled in the art that the present disclosure can also be realized in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, and circuits are omitted so as not to interfere with the description of the present disclosure.

[0010] In an OLED panel, the light emission of the OLED is often controlled using a 2T1C driving circuit. The 2T1C driving circuit generally includes two thin-film transistors, one capacitor, and an organic light-emitting diode. Exemplarily, as shown in FIG. 1, the driving circuit 1 includes a first thin-film transistor T1, a second thin-film transistor T2, an organic light-emitting diode OLED, and a capacitor C. For the first thin-film transistor T1, the control electrode T1a is connected to the scanning line Scan, the first electrode T1b is connected to the data line Data, and the second electrode T1c is connected to the control electrode T2a of the second thin-film transistor T2. For the second thin-film transistor T2, the second electrode T2c is connected to the positive electrode of the organic light-emitting diode, and the first electrode T2b is connected to VDD (i.e., the power supply terminal). The negative electrode of the organic light-emitting diode is grounded. One end of the capacitor C is connected to the second electrode T1c of the first thin-film transistor T2, and the other end is connected to the negative electrode of the organic light-emitting diode.

[0011] When the scanning line Scan in the driving circuit 1 receives the first high-level signal, the first thin-film transistor T1 turns on, the data line Data charges the capacitor C, and a voltage can be applied to the control electrode T2a of the second thin-film transistor T2. After the control electrode T2a of the second thin-film transistor T2 receives the voltage of the data line Data, the second thin-film transistor T2 turns on, and a voltage is applied to the positive electrode of the organic light-emitting diode through the second electrode T2 of the second thin-film transistor T2, so that the organic light-emitting diode can emit light.

[0012] When the scanning line Scan receives the first low-level signal, the first thin-film transistor T1 turns off, and the data line Data cannot apply a voltage to the control electrode T2a of the second thin-film transistor T2. At this time, the capacitor C discharges, and the capacitor C supplies a voltage to the control electrode T2a of the second thin-film transistor T2 (to maintain conduction) to cause the organic light-emitting diode to emit light.

[0013] Due to the threshold voltage drift of the TFT caused by a long-time gate bias and the possibility that the voltage applied to the control electrode T2a of the second thin-film transistor T2 when the capacitor discharges is smaller than the threshold voltage after the drift, the emission luminance of the OLED decreases, affecting the display effect of the OLED.

[0014] Note that the present disclosure is not particularly limited to the structure of the driving circuit 1, and any driving circuit 1 having a first thin-film transistor, a second thin-film transistor, an organic light-emitting diode, and a capacitor may be used. For example, a P-type 2T1C (i.e., two thin-film transistors and one capacitor) circuit may also be used.

[0015] The related art has the following solution means. A compensation circuit connected to a driving circuit is provided in a display panel. As shown in FIG. 2, the compensation circuit includes a first thin film transistor T1-1, a second thin film transistor T1-2, a third thin film transistor T1-3, and a capacitor C2. The control electrode of the first thin film transistor T1-1, the second thin film transistor T1-2, and the third thin film transistor T1-3 are connected to a first scanning line Scan1(n), a second scanning line Scan2(n), and a third scanning line Scan3(n), respectively. The first thin film transistor T1-1 has its first electrode grounded and its second electrode connected to one end of the capacitor C2. The third thin film transistor T1-3 has its first electrode grounded and its second electrode connected to the other end of the capacitor C2. The second thin film transistor T1-2 has its first electrode connected to an internal driving circuit and its second electrode connected to the other end of the capacitor C2. When the scanning line receives a high-level signal, it charges the capacitor C1 and the capacitor C2. When the scanning line receives a low level, the grounded capacitor C2 performs voltage compensation on the capacitor C1. This avoids the threshold voltage from drifting and affecting the light emission of the OLED. However, this requires adding a plurality of transistors, scanning lines, and capacitors to the display panel. As shown in the figure, the circuit is complex, the wiring of the panel increases significantly, the area of a single OLED increases, and the appearance is poor.

[0016] Example 1 The present disclosure provides a compensation circuit used in a driving circuit 1. The compensation circuit can be installed on an external chip, has a simple connection circuit, solves the problem that the light emission efficiency of the OLED panel is low due to threshold voltage drift in the OLED panel, and guarantees the light emission efficiency of the OLED panel.

[0017] Hereinafter, the compensation circuit 2 according to the present disclosure will be exemplarily described with reference to the drawings.

[0018] Taking the driving circuit 1 shown in FIG. 1 as an example, based on FIG. 1, as shown in FIG. 3, the compensation circuit 2 according to the present disclosure includes a third thin film transistor T3 and a detection module 201. The control electrode T3a of the third thin film transistor T3 is connected to the second electrode T2c of the second thin film transistor T2, and the first electrode T3b is connected to the control electrode T2a of the second thin film transistor T2. The detection module 201 is connected to the second electrode T3c of the third thin film transistor T3, the scanning line Scan, and the data line Data, respectively. When the detection module 201 receives two adjacent voltage signals output from the second electrode T3c of the third thin film transistor T3, it turns off and on respectively.

[0019] When the scanning line Scan in the driving circuit 1 receives the first high-level signal, the first thin film transistor T1 turns on, the data line Data charges the capacitor C and applies a voltage to the control electrode T2a of the second thin film transistor T2 to turn on the second thin film transistor T2. After the second thin film transistor T2 turns on, the organic light-emitting diode emits light, and the second electrode T2c of the second thin film transistor T2 applies a voltage (i.e., Vdd) to the control electrode T3a of the third thin film transistor T3 to turn on the third thin film transistor T3. At this time, the first electrode T3b of the third thin film transistor T3 collects the gate voltage Vth of the control electrode T2a of the second thin film transistor T2, and transmits the gate voltage Vth to the detection module 201 through the second electrode T3c of the third thin film transistor T3. After receiving the gate voltage Vth, the detection module 201 turns on, and outputs the gate voltage Vth to the data line Data.

[0020] When the scanning line Scan in the driving circuit 1 receives the first low-level signal, the first thin film transistor T1 turns off, and the capacitor C discharges to the control electrode T2a of the second thin film transistor T2, so that the second thin film transistor T2 is maintained in the on state, and the organic light-emitting diode maintains light emission.

[0021] After that, when the scanning line Scan in the driving circuit 1 receives the second high-level signal, the first thin-film transistor T1 is turned on, the data line Data charges the capacitor C with the data voltage Vdata and the gate voltage Vth, and applies a voltage to the control electrode T2a of the second thin-film transistor T2 to turn on the second thin-film transistor T2. The organic light-emitting diode emits light, and by applying a voltage from the second electrode T2c of the second thin-film transistor T2 to the control electrode T3a of the third thin-film transistor T3, the third thin-film transistor T3 is turned on. At this time, the first electrode T3b of the third thin-film transistor T3 collects the gate voltage Vth of the control electrode T2a of the second thin-film transistor T2, and transmits the gate voltage Vth to the detection module 201 through the second electrode T3c of the third thin-film transistor T3. After receiving the gate voltage Vth, the detection module 201 turns off, and does not apply a voltage to the data line Data.

[0022] When the scanning line Scan receives the second low-level signal, the first thin-film transistor T1 is turned off, the capacitor C discharges, and since there is a data voltage and a gate voltage Vth for compensating Vdata in the capacitor C at this time, the second thin-film transistor T2 can also achieve the luminance when the organic light-emitting diode is at the high-level signal by the low-level signal, ensuring the luminous efficiency of the organic light-emitting diode. In this way, by means of the switching mode of the high-level / low-level signal, the problem of threshold voltage drift due to long-term gate bias is solved, and the luminous efficiency is guaranteed even in the low-level signal.

[0023] After the scanning line Scan receives the third high-level signal, the detection module 201 turns on and outputs the threshold voltage to the data line Data. The detection module 201 repeatedly circulates in an operating state where it turns off and on respectively when receiving two adjacent high-level signals.

[0024] In one example, the present disclosure can design a detection module based on a T flip-flop. For example, as shown in FIG. 4, the detection module may include a resistor R, a T flip-flop, and a fourth thin-film transistor T4. One end of the resistor R (i.e., the R1 end shown in FIG. 4) is connected to the clock signal receiving end of the T flip-flop (i.e., the C1 end shown in FIG. 4), and the other end (i.e., the R2 end shown in FIG. 4) is connected to the scanning line Scan. The second data signal input end (the T end shown in FIG. 4) of the T flip-flop is used to input a digital signal. When the second data signal input end receives a digital signal "0", the in-phase output end (the Q end shown in FIG. 4) of the T flip-flop outputs a low-level signal. When the second data signal input end receives a digital signal "1", the Q end of the T flip-flop outputs a high-level signal. The Q end of the T flip-flop is connected to the control pole T4a of the fourth thin-film transistor T4. For the fourth thin-film transistor T4, the second pole T4b is connected to the second pole T3c of the third thin-film transistor T3, and the first pole T4c is connected to the data line Data.

[0025] Exemplarily, the T flip-flop may be a falling-edge T flip-flop. In the falling-edge T flip-flop in the embodiments of the present disclosure, the T end is always at a high level. The C1 end of the falling-edge T flip-flop turns off and on respectively when detecting two adjacent falling-edge signals. Thereby, the fourth thin-film transistor T4 turns off and on correspondingly.

[0026] For example, when the scanning line Scan receives the first high-level signal, the detection module 201 receives the high-level signal (i.e., the clock control signal) output from the scanning line Scan. When the T end receives a digital signal "1", the falling-edge T flip-flop outputs a high level, turns on the fourth thin-film transistor T4, and thereby the detection module 201 outputs the gate voltage Vth to the data line Data.

[0027] When the scan line Scan in the driving circuit 1 receives the first low-level signal, the first thin-film transistor T1 turns off, the capacitor C discharges to the control pole T2a of the second thin-film transistor T2, and the organic light-emitting diode emits light.

[0028] When the scan line Scan in the driving circuit 1 receives the second high-level signal, when the C1 terminal of the T flip-flop receives the clock control signal and the T terminal receives the digital signal "1", the Q terminal of the rising-edge T flip-flop outputs a low level. After the control pole T4a of the fourth thin-film transistor T4 receives a low level, the fourth thin-film transistor T4 turns off, and the first pole T4b of the fourth thin-film transistor T4 does not output a voltage to the data line Data. Thereby, the detection module 201 can turn off and turn on the fourth thin-film transistor T4 respectively when receiving two adjacent high-level signals, that is, control the gate voltage Vth to be compensated.

[0029] If not as described above, when the scan line Scan frequently receives high-level signals, the compensation circuit 2 always applies one gate voltage Vth to the data line Data, and the gate voltage Vth to be compensated always increases, eventually causing a failure of the OLED panel.

[0030] It should be noted that when the threshold voltage changes due to changes in the external environment, the gate voltage Vth detected in the present disclosure also changes.

[0031] In one example, as shown in FIG. 5, the compensation circuit 2 may further include a voltage follower (i.e., A shown in FIG. 5). The voltage follower is serially connected between the third thin-film transistor T3 and the detection module 201. The non-inverting input terminal (i.e., the "+" terminal of A shown in FIG. 5) is connected to the second pole T3c of the third thin-film transistor T3, and the output terminal is connected to the detection module 201 and the inverting input terminal of the voltage follower (i.e., the "-" terminal of A shown in FIG. 5) respectively. By installing the voltage follower A in the compensation circuit 2, the load capacity of the compensation circuit 2 can be improved, and the loss of the gate voltage during transmission can be reduced.

[0032] In one example, as shown in FIG. 6, the compensation circuit 2 further includes a first control module 202. The first control module 202 is connected to the second pole T2c of the second thin film transistor T2 and the second control module respectively. The control module 202 controls the second control module to alternately output a high-level signal and a low-level signal based on the signal output from the second pole T2c of the second thin film transistor T2. The second control module alternately inputs the high-level signal and the low-level signal to the scanning line Scan. Thereby, it is not necessary to add a pull-up resistor and a pull-down resistor to control the high-level / low-level conversion respectively, and the conversion between high-level and low-level can be realized by one control module 202.

[0033] Exemplarily, the first control module 202 may include a comparator (i.e., B shown in FIG. 7), a D flip-flop, an inverter (i.e., E shown in FIG. 7), a first metal oxide semiconductor field effect transistor M1, and a second metal oxide semiconductor field effect transistor M2. The comparator B has its non-inverting input terminal (i.e., the “+” terminal of B shown in FIG. 7) connected to the second pole T2c of the second thin film transistor T2, its inverting input terminal (i.e., the “-” terminal of B shown in FIG. 7) grounded, and its output terminal connected to the control pole T3a of the third thin film transistor T3. The D flip-flop has its clock signal receiving terminal (i.e., the C1 terminal shown in FIG. 7) connected to the output terminal of the comparator B, its data signal input terminal (i.e., the D terminal shown in FIG. 7) connected to the output terminal of the inverter E, and its positive phase signal output terminal (i.e., the Q terminal shown in FIG. 7) connected to the input terminal of the inverter E, the control pole M1a of the first metal oxide semiconductor field effect transistor M1, and the control pole M2a of the second metal oxide semiconductor field effect transistor M2 respectively. The second pole M1c of the first metal oxide semiconductor field effect transistor M1 and the second pole M2c of the second metal oxide semiconductor field effect transistor are respectively connected to the second control module.

[0034] Also, the comparator may be a zero-crossing voltage comparator.

[0035] Also, the D flip-flop may be a rising-edge D flip-flop.

[0036] For example, when the scanning line Scan receives the first high-level signal, the first thin-film transistor T1 is turned on, the data line Data charges the capacitor C and applies a voltage to the control pole T2a of the second thin-film transistor T2, thereby turning on the second thin-film transistor T2. After the second thin-film transistor T2 is turned on, the organic light-emitting diode emits light, and the second pole T2c of the second thin-film transistor T2 applies a voltage to the non-inverting input terminal (+) of the comparator B. When the voltage at this time is greater than the voltage when the inverting input terminal (-) of the comparator B is grounded, the output terminal of the comparator B outputs a high level, and the comparator B applies a voltage to the control pole T3a of the third thin-film transistor T3, thereby turning on the third thin-film transistor T3. When the clock signal receiving terminal of the D flip-flop receives the signal output from the output terminal of the comparator B, since the data signal input terminal of the D flip-flop is at a high level, the non-inverting signal output terminal of the D flip-flop outputs a high level. When the non-inverting signal output terminal of the D flip-flop outputs a high level, the control pole M1a of the first metal-oxide semiconductor field-effect transistor M1 receives the high level, the first metal-oxide semiconductor field-effect transistor M1 is turned on, and the second metal-oxide semiconductor field-effect transistor M2 is turned off. Thereby, the first metal-oxide semiconductor field-effect transistor M1 outputs a high-level signal to the second control module 203, and the second control module 203 outputs a high-level signal to the scanning line Scan. Also, since the data signal input terminal of the D flip-flop is connected to the output terminal of the inverter E and the non-inverting signal output terminal of the D flip-flop is connected to the input terminal of the inverter E, after the non-inverting signal output terminal of the D flip-flop outputs a high level, a high level inputs a digital signal "0" to the data signal input terminal of the D flip-flop through the inverter E. Therefore, the non-inverting signal output terminal of the D flip-flop outputs a low level, the control pole M2a of the second metal-oxide semiconductor field-effect transistor M2 receives the high level, the second metal-oxide semiconductor field-effect transistor M2 is turned on, and the first metal-oxide semiconductor field-effect transistor M1 is turned off. Thereby, the second metal-oxide semiconductor field-effect transistor M2 outputs a low-level signal to the second control module 203 to control the scanning line Scan.In this way, the D flip-flop can always hold the switching of receiving the data signals “0” and “1”, thereby realizing the conversion between high level and low level by one first control module 202.

[0037] In one example, in order to avoid the change of circuit characteristics due to the difference of transistors, the first thin-film transistor T1, the second thin-film transistor T2, the third thin-film transistor T3 and the fourth thin-film transistor T4 according to the embodiments of the present disclosure may be the same transistors.

[0038] Exemplarily, an oxide thin-film transistor (oxide thin-film transistor-TFT, Oxide TFT) may be adopted. The Oxide TFT has high carrier mobility, low manufacturing temperature and good electrical uniformity.

[0039] Embodiment Two Embodiment Two of the present disclosure further provides a control chip connected to the scanning line of the display panel and inputting a scanning signal to the scanning line. The control chip includes the compensation circuit according to Embodiment One.

[0040] Here, one compensation circuit 2 may be installed in the control chip. The first pole T3b of the third thin-film transistor T3 in the compensation circuit 2 is respectively connected to the control pole T2a of the second thin-film transistor T2 in the driving circuit corresponding to each OLED in the display panel, and overall performs threshold voltage compensation on the display panel.

[0041] Also, a plurality of compensation circuits 2 may be installed in the control chip, and each compensation circuit corresponds to one display area in the display panel. For example, as shown in FIG. 8, when the display panel is divided into nine areas, nine compensation circuits 2 may be installed in the control chip. The first pole T3b of the third thin-film transistor T3 in each compensation circuit 2 is respectively connected to the control pole T2a of the second thin-film transistor T2 in the driving circuit corresponding to each OLED in the corresponding display area, and performs threshold voltage compensation on the corresponding area.

[0042] In addition, a compensation circuit 2 for a driving circuit corresponding to each OLED in the display panel may be provided in the control chip. That is, each OLED is divided into one display area.

[0043] Note that the more the divided areas of the display panel are, the more precise the compensation for the gate voltage Vth for each area is, and the better the display effect of the OLED panel is. The specific compensation mode can be determined according to actual requirements.

[0044] Embodiment III Based on the control chip, Embodiment III of the present disclosure further provides a display device. The display device includes the control chip according to Embodiment II.

[0045] Note that the term "comprising" used in the specification and claims of the present disclosure indicates the presence of the described features, wholes, steps, operations, elements, and / or assemblies, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, assemblies, and / or their combinations.

[0046] In addition, the term "and / or" used in the specification and claims of the present disclosure refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0047] In addition, in the description of the specification and claims of the present disclosure, terms such as "first", "second", "third", etc. are merely for distinction and should not be understood as indicating or implying relative importance.

[0048] References to "one embodiment" or "some embodiments" or the like described in this disclosure specification mean that in one or more embodiments according to this disclosure, it includes specific features, structures or features described in connection with that embodiment. Thus, "in one embodiment", "in some embodiments", "in some other embodiments", "in some other alternative embodiments" and the like at different places in this specification do not necessarily refer to the same embodiment without special explanation otherwise, and refer to "one or more but not all embodiments". The terms "comprising", "including", "having" and their variations all mean "including but not limited to" without special explanation otherwise.

[0049] The above-described embodiments are merely for explaining the technical solutions of this disclosure and are not limitations thereto. Despite having described this disclosure in detail with reference to the above-described embodiments, those skilled in the art can still modify the technical solutions described in each of the above embodiments or equivalently substitute some of the technical features therein. Any of these modifications or substitutions should be included within the protection scope of this disclosure without departing from the spirit and scope of the technical solutions of each embodiment of this disclosure corresponding to the technical solutions.

Claims

1. A compensation circuit used in a driving circuit, wherein the driving circuit includes a first thin-film transistor, a second thin-film transistor, an organic light-emitting diode, and a capacitor, wherein for the first thin-film transistor, a control electrode is connected to a scanning line, a first electrode is connected to a data line, and a second electrode is connected to a control electrode of the second thin-film transistor, wherein for the second thin-film transistor, a second electrode is connected to an anode of the organic light-emitting diode, and a first electrode is connected to a power supply terminal, wherein for the organic light-emitting diode, a cathode is grounded, wherein for the capacitor, one end is connected to the second electrode of the first thin-film transistor, and the other end is connected to the cathode of the organic light-emitting diode, wherein the compensation circuit includes a third thin-film transistor and a detection module, wherein for the third thin-film transistor, a control electrode is connected to the second electrode of the second thin-film transistor, and a first electrode is connected to the control electrode of the second thin-film transistor, wherein the detection module is respectively connected to a second electrode of the third thin-film transistor, the scanning line, and the data line, wherein the detection module turns on the output of the voltage from the second electrode of the third thin-film transistor to the data line during a period from receiving a first high-level signal applied to the scanning line until receiving a second high-level signal applied to the scanning line that is temporally adjacent to and subsequent to the first high-level signal, and turns off the output of the voltage from the second electrode of the third thin-film transistor to the data line during a period from receiving the second high-level signal applied to the scanning line until receiving a third high-level signal applied to the scanning line that is temporally adjacent to and subsequent to the second high-level signal, a compensation circuit.

2. wherein the detection module includes a resistor, a T flip-flop, and a fourth thin-film transistor, wherein for the resistor, one end is connected to a clock signal receiving end of the T flip-flop, and the other end is connected to the scanning line, wherein for the T flip-flop, a positive-phase signal output end is connected to a control electrode of the fourth thin-film transistor, wherein for the fourth thin-film transistor, a second electrode is connected to the second electrode of the third thin-film transistor, and a first electrode is connected to the data line, the compensation circuit according to Claim 1.

3. wherein the first thin-film transistor, the second thin-film transistor, the third thin-film transistor, and the fourth thin-film transistor are oxide thin-film transistors. The compensation circuit according to claim 2.

4. The T flip-flop receives a high-level signal at the second data signal input terminal, The compensation circuit according to claim 2.

5. The compensation circuit further includes a voltage follower connected in series between the third thin film transistor and the detection module, The voltage follower has its non-inverting input terminal connected to the second pole of the third thin film transistor, and its output terminal connected to the detection module and the inverting input terminal of the voltage follower respectively, The compensation circuit according to claim 1 or 2.

6. The compensation circuit further includes a first control module, The first control module is connected to the second pole of the second thin film transistor and the second control module respectively, The first control module controls the second control module to alternately output a high-level signal and a low-level signal based on the signal output from the second pole of the second thin film transistor, The second control module alternately inputs the high-level signal and the low-level signal to the scanning line, The compensation circuit according to claim 1 or 2.

7. The first control module includes a comparator, a D flip-flop, an inverter, a first metal oxide semiconductor field effect transistor, and a second metal oxide semiconductor field effect transistor, The comparator has its non-inverting input terminal connected to the second pole of the second thin film transistor, its inverting input terminal grounded, and its output terminal connected to the control pole of the third thin film transistor, The D flip-flop has its clock signal receiving terminal connected to the output terminal of the comparator, its data signal input terminal connected to the output terminal of the inverter, and its positive-phase signal output terminal connected to the input terminal of the inverter, the control pole of the first metal oxide semiconductor field effect transistor, and the control pole of the second metal oxide semiconductor field effect transistor respectively, The second poles of the first metal oxide semiconductor field effect transistor and the second metal oxide semiconductor field effect transistor are respectively connected to the second control module, The compensation circuit according to claim 6.

8. The comparator is a zero-crossing voltage comparator, The compensation circuit according to claim 7.

9. The D flip-flop is a rising-edge D flip-flop, The compensation circuit according to claim 7.

10. A control chip connected to a scanning line in a display panel for inputting a scanning signal to the scanning line, wherein the control chip includes a compensation circuit used in a driving circuit, the driving circuit includes a first thin film transistor, a second thin film transistor, an organic light emitting diode, and a capacitor, the first thin film transistor has a control electrode connected to the scanning line, a first electrode connected to the data line, and a second electrode connected to the control electrode of the second thin film transistor, the second thin film transistor has a second electrode connected to the positive electrode of the organic light emitting diode and a first electrode connected to the power supply terminal, the organic light emitting diode has a negative electrode grounded, one end of the capacitor is connected to the second electrode of the first thin film transistor, and the other end is connected to the negative electrode of the organic light emitting diode, the compensation circuit includes a third thin film transistor and a detection module, the third thin film transistor has a control electrode connected to the second electrode of the second thin film transistor and a first electrode connected to the control electrode of the second thin film transistor, the detection module is respectively connected to the second electrode of the third thin film transistor, the scanning line, and the data line, the detection module, after receiving the first high level signal applied to the scanning line, until receiving the second high level signal applied to the scanning line that is temporally adjacent to and subsequent to the first high level signal, turns on the output of the voltage from the second electrode of the third thin film transistor to the data line, after receiving the second high level signal applied to the scanning line, until receiving the third high level signal applied to the scanning line that is temporally adjacent to and subsequent to the second high level signal, turns off the output of the voltage from the second electrode of the third thin film transistor to the data line, control chip.

11. The control chip includes one compensation circuit, the first electrode of the third thin film transistor in the compensation circuit is respectively connected to the second thin film transistors in the driving circuits corresponding to the respective light emitting diodes in the display panel, The control chip according to claim 10.

12. The control chip includes at least one compensation circuit, and each of the compensation circuits corresponds to one display area in the display panel, The first pole of the third thin-film transistor of each of the compensation circuits is connected to the second thin-film transistor in the driving circuit corresponding to each light-emitting diode in the corresponding display area, The control chip according to claim 10.

13. The control chip includes at least one compensation circuit, each of the compensation circuits corresponding to the organic light-emitting diode in the display panel, and each of the organic light-emitting diodes corresponding to one display area, The control chip according to claim 10.

14. A display device including a control chip The control chip is connected to a scanning line in a display panel and is used to input a scanning signal to the scanning line, The control chip includes a compensation circuit used in a driving circuit, The driving circuit includes a first thin-film transistor, a second thin-film transistor, an organic light-emitting diode, and a capacitor, For the first thin-film transistor, the control pole is connected to the scanning line, the first pole is connected to the data line, and the second pole is connected to the control pole of the second thin-film transistor, For the second thin-film transistor, the second pole is connected to the positive electrode of the organic light-emitting diode, and the first pole is connected to the power supply terminal, For the organic light-emitting diode, the negative electrode is grounded, One end of the capacitor is connected to the second pole of the first thin-film transistor, and the other end is connected to the negative electrode of the organic light-emitting diode, The compensation circuit includes a third thin-film transistor and a detection module, For the third thin-film transistor, the control pole is connected to the second pole of the second thin-film transistor, and the first pole is connected to the control pole of the second thin-film transistor, The detection module is respectively connected to the second pole of the third thin-film transistor, the scanning line, and the data line, The detection module is After receiving the first high-level signal applied to the scanning line, until receiving the second high-level signal applied to the scanning line that is temporally adjacent to and subsequent to the first high-level signal, it enables the voltage output from the second pole of the third thin-film transistor to be output to the data line, After receiving the second high-level signal applied to the scanning line, until receiving the third high-level signal applied to the scanning line that is temporally adjacent to and subsequent to the second high-level signal, it disables the voltage output from the second pole of the third thin-film transistor to be output to the data line, Display device.

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