A drive control circuit, a display device, and a drive control method

Abstract

The present disclosure relates to the field of display, and discloses a driving control circuit, a display device and a driving control method. The driving control circuit comprises a control circuit and at least one temperature sensor. The control circuit is configured to output a pulse width modulation signal according to a preset duty ratio. The temperature sensor is coupled with the control circuit and is configured to receive the pulse width modulation signal and output an electrical signal related to the collected temperature data of the display panel when the pulse width modulation signal is at an effective potential. The temperature sensor is only turned on when the pulse width modulation signal is at the effective potential, thereby avoiding the characteristic drift of the temperature sensor due to long-time opening and affecting the accuracy of the output electrical signal, and further accurately matching the temperature-related overdrive current, effectively improving the quality of the display picture.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and provides a driving control circuit, a display device and a driving control method. BACKGROUND

[0002] In the related art, the display of a pixel unit is often affected by temperature. In particular, when the display panel is a negative liquid crystal, the rotation speed of the negative liquid crystal is greatly affected by temperature, for example, the lower the temperature, the slower the deflection speed, and so on. Thus, when the temperature fluctuates, the pixel unit displays using the overdrive relationship table debugged at normal temperature, and the phenomenon of dynamic picture color reversal caused by excessive overdrive occurs. SUMMARY

[0003] The embodiments of the present disclosure provide a driving control circuit, a display device and a driving control method, which can accurately match the temperature-related overdrive current to avoid the situation that the temperature sensor affects the accuracy of the output electrical signal due to long-time opening, and effectively improve the quality of the display picture.

[0004] The specific technical solutions provided by the present disclosure are as follows:

[0005] In a first aspect, the embodiments of the present disclosure provide a driving control circuit, comprising: a control circuit and at least one temperature sensor;

[0006] The control circuit is configured to output a pulse width modulation signal according to a preset duty cycle;

[0007] The temperature sensor is coupled with the control circuit and is configured to receive the pulse width modulation signal and output an electrical signal related to the temperature data of the display panel collected when the pulse width modulation signal is an effective potential.

[0008] Optionally, the temperature sensor is configured to be cut off when the pulse width modulation signal is an ineffective potential.

[0009] Optionally, the temperature sensor comprises a temperature sensing transistor;

[0010] The control end of the temperature sensing transistor is coupled with the control circuit to receive the pulse width modulation signal;

[0011] The first end of the temperature sensing transistor is coupled with a direct current power supply end;

[0012] The second end of the temperature sensing transistor is coupled with the control circuit to provide the electrical signal to the control circuit.

[0013] Optionally, the temperature sensor comprises a temperature sensing transistor;

[0014] The first end of the temperature sensing transistor is coupled with the control circuit to receive the pulse width modulation signal.

[0015] The control end of the temperature sensing transistor is coupled with the direct current power supply end.

[0016] The second end of the temperature sensing transistor is coupled with the control circuit to provide the electrical signal to the control circuit.

[0017] Optionally, the temperature sensor comprises a temperature sensing transistor.

[0018] The control end and the first end of the temperature sensing transistor are both coupled with the control circuit to receive the pulse width modulation signal.

[0019] The second end of the temperature sensing transistor is coupled with the control circuit to provide the electrical signal to the control circuit.

[0020] Optionally, the phase of the pulse width modulation signal of the control end and the phase of the pulse width modulation signal of the first end are the same.

[0021] Optionally, the control circuit is coupled with the temperature sensor through a potential conversion unit.

[0022] The potential conversion unit is configured to output the pulse width modulation signal with a raised effective potential output by the control circuit to the temperature sensor.

[0023] Optionally, the control circuit is coupled with the temperature sensor through a timing controller.

[0024] The control circuit is configured to acquire the electrical signal output by the temperature sensing transistor, convert the electrical signal into a target value, and send the target value to the timing controller.

[0025] The timing controller is configured to store the target value, select an overdrive relationship table matching the target value according to the period of the pulse width modulation signal, and control the display panel to display a picture according to the overdrive relationship table.

[0026] Optionally, the period of the pulse width modulation signal is 20-30 seconds.

[0027] In a second aspect, the embodiments of the present disclosure provide a display device, comprising a display panel and the driving control circuit of any one of the above.

[0028] Optionally, the display panel comprises a display area and a non-display area, at least one temperature sensing transistor is arranged in the non-display area, the display area comprises a display transistor, the display transistor is electrically connected with the gate line and the data line of the display area, and the temperature sensing transistor is prepared in the same layer and with the same material as the display transistor.

[0029] Optionally, the display device further comprises a first circuit board, a second circuit board and a third circuit board; the first circuit board is coupled with the display panel and the second circuit board, and the second circuit board is coupled with the third circuit board.

[0030] The first circuit board comprises a sampling resistor and a sampling amplifier, the second circuit board comprises a control circuit and a potential conversion unit, and the third circuit board comprises a timing controller.

[0031] The temperature sensing transistor is coupled with the control circuit on the second circuit board through the sampling resistor and the sampling amplifier on the first circuit board and the third circuit board in sequence.

[0032] In a third aspect, the embodiments of the present disclosure provide a driving control method, comprising:

[0033] The control circuit outputs a pulse width modulation signal according to a preset duty cycle.

[0034] The temperature sensor receives the pulse width modulation signal and outputs an electrical signal related to the collected temperature data of the display panel when the pulse width modulation signal is an effective potential.

[0035] The present disclosure has the following beneficial effects:

[0036] In summary, the driving control circuit, the display device and the driving control method provided in the embodiments of the present disclosure comprise: a control circuit and at least one temperature sensor, the control circuit is configured to output a pulse width modulation signal according to a preset duty cycle, and the temperature sensor is coupled with the control circuit and is configured to receive the pulse width modulation signal and output an electrical signal related to the collected temperature data of the display panel when the pulse width modulation signal is an effective potential. The temperature sensor is only turned on when the pulse width modulation signal is an effective potential, thereby avoiding the situation that the temperature sensor drifts due to long-time opening and affects the accuracy of the output electrical signal, and further accurately matching the temperature-related overdrive current, effectively improving the quality of the display picture.

[0037] Other features and advantages of the present disclosure will be further explained in the following description, and some will become apparent from the description, or will be learned through practice of the present disclosure. The objectives and other advantages of the present disclosure can be achieved and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0038] The drawings described herein are used to provide further understanding of the present disclosure, and form a part of the present disclosure. The illustrative embodiments of the present disclosure and their description serve to explain the present disclosure, and do not constitute improper limitations on the present disclosure. In the drawings:

[0039] Figure 1A schematic diagram of characteristic drift of a temperature sensor in the related art;

[0040] Figure 2 A connection diagram of a driving control circuit in an embodiment of the present disclosure;

[0041] Figure 3 A circuit connection diagram of a first temperature sensing transistor and a control circuit in an embodiment of the present disclosure;

[0042] Figure 4 A circuit connection diagram of a second temperature sensing transistor and a control circuit in an embodiment of the present disclosure;

[0043] Figure 5 A circuit connection diagram of a third temperature sensing transistor and a control circuit in an embodiment of the present disclosure;

[0044] Figure 6 A connection diagram of another driving control circuit in an embodiment of the present disclosure;

[0045] Figure 7 A connection diagram of a first display device in an embodiment of the present disclosure;

[0046] Figure 8 A connection diagram of a second display device in an embodiment of the present disclosure;

[0047] Figure 9 A flow chart of a driving control method in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments described in the present disclosure document, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the technical solutions of the present disclosure.

[0049] The terms “first”, “second”, and the like in the specification of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0050] In the process of displaying in the pixel unit, it is often affected by temperature. Especially when the display panel is negative liquid crystal, the rotation speed of the negative liquid crystal is greatly affected by temperature, for example, the lower the temperature, the slower the deflection speed, and so on. Thus, when the temperature fluctuates, the pixel unit displays by using the overdrive relationship table debugged at normal temperature, which may cause the phenomenon of dynamic picture reverse color defect caused by excessive overdrive or insufficient overdrive, and a temperature sensor needs to be integrated in the display panel to weaken the influence of temperature on the display effect.

[0051] The temperature sensor can be integrated on the display panel, and the temperature sensor converts the collected temperature data of the display panel into current output. In use, the temperature sensor is driven by conventional direct current, and then the current output converted by the temperature sensor is obtained. Due to the process influence of the temperature sensor itself, and the temperature sensor cannot be compared with itself (i.e. the temperature sensor directly obtains the temperature of the display panel, even if a temperature sensor of the same type is loaded on the display panel as a standard part, but the temperature sensor will still collect temperature, and cannot be used as a standard part to offset the process influence), the output current will drift in characteristics after a long time, which will cause the output current to be inaccurate and affect the display effect. The reason is that the temperature sensor driven by conventional direct current is always on, as shown in Figure 1 The process degradation has a greater influence on the temperature sensor within the opening time of the temperature sensor, and the accuracy of the output current is poor.

[0052] Therefore, the disclosure provides a driving control circuit, which detects the temperature of the display panel by the temperature sensor, i.e. the conventional direct current driving is replaced by pulse width modulation signal driving. Thus, the temperature sensor is only turned on at the time when the current output is needed (i.e. the time when the pulse width modulation signal is in the active potential), and the temperature sensor is turned off at other times. The process degradation influence of the temperature sensor is greatly reduced, the accuracy of the output electrical signal is higher, and then the overdrive relationship table matched with different temperatures is called according to the electrical signal corresponding to different temperatures, and on this basis, the gray scale voltage corresponding to different overdrive relationship tables is loaded on the data line, so as to improve the display quality of the display panel.

[0053] The preferred embodiments of the disclosure will be described in detail below with reference to the accompanying drawings.

[0054] Referring to Figure 2 The driving control circuit 10 provided by the embodiment of the present application includes a control circuit 10 and at least one temperature sensor 20.

[0055] The control circuit 10 is configured to output a pulse width modulation signal according to a preset duty cycle.

[0056] In the implementation process, the preset duty cycle is input into the control circuit 10 first, and the control circuit 10 generates a pulse width modulation signal in combination with the duty cycle and the conventional direct current of the direct current power supply end, that is, the high and low potential interval distribution is realized by the duty cycle on the basis of the conventional direct current of the direct current power supply end. After the control circuit 10 generates the pulse width modulation signal, the pulse width modulation signal is output to the at least one temperature sensor 20.

[0057] It should be noted that the setting of the above-mentioned duty cycle needs to ensure that the temperature sensor 20 can be normally started, and on the other hand, the current converted by the temperature sensor 20 can be stably output. Generally, the setting of the above-mentioned duty cycle is 25%-65%.

[0058] The temperature sensor 20 is coupled with the control circuit 10 and is configured to receive the pulse width modulation signal and output an electric signal related to the temperature data of the display panel collected when the pulse width modulation signal is an effective potential.

[0059] In the embodiments of the present application, the number and position of the above-mentioned temperature sensor 20 are not limited and can be arranged in the non-display area of the display panel, for example, can be arranged only in the non-display area of the side of the display panel close to the circuit board, or can be arranged in the non-display area of the other three sides of the display panel away from the circuit board.

[0060] The above-mentioned temperature sensor 20 is not always in an open state, in the implementation process, after the temperature sensor 20 receives the pulse width modulation signal sent by the control circuit 10, it is judged whether the pulse width modulation signal is an effective potential, only when the pulse width modulation signal is an effective potential, the temperature sensor 20 will collect the temperature data of the display panel, and convert the temperature data into a related electric signal (for example, a current signal or a voltage signal), and then output the electric signal.

[0061] In addition, the temperature sensor 20 is configured to be cut off when the pulse width modulation signal is an invalid potential.

[0062] In the embodiments of the present application, the temperature sensor 20 works in time division, when the pulse width modulation signal is an effective potential, the temperature sensor 20 is opened, and when the pulse width modulation signal is an invalid potential, the temperature sensor 20 is cut off. It should be noted that the above-mentioned effective potential can be high level (N-type transistor) or low level (P-type transistor) according to the type of the temperature sensor 20. Since the temperature sensor 20 realizes time-division work, the influence of process recession of the temperature sensor 20 is effectively reduced, and the accuracy of the output electric signal of the temperature sensor 20 is improved.

[0063] Exemplarily, the temperature sensor 20 in the embodiment of the present application comprises a temperature sensing transistor, which can be N-type or P-type, and the type of the temperature sensing transistor is not limited. In the embodiment of the present application, the combination mode of the control circuit 10 and the temperature sensing transistor mainly includes the following three cases:

[0064] Referring to Figure 3 the first case, the temperature sensor 20 comprises a temperature sensing transistor.

[0065] The control end (G terminal) of the temperature sensing transistor is coupled with the control circuit 10, for receiving the pulse width modulation signal PWM.

[0066] In the implementation process, after the control circuit 10 generates and outputs the pulse width modulation signal PWM, the control end (G terminal) of the temperature sensing transistor coupled with the control circuit 10 receives the pulse width modulation signal PWM. When the pulse width modulation signal PWM is an effective potential, the control end (G terminal) controls the temperature sensing transistor to be turned on. When the pulse width modulation signal PWM is an ineffective potential, the control end (G terminal) controls the temperature sensing transistor to be turned off.

[0067] The first end (S terminal) of the temperature sensing transistor is coupled with the direct current power supply end.

[0068] In the implementation process, in order to ensure the normal operation of the temperature sensing transistor, the direct current power supply end provides a conventional direct current to the first end (S terminal) of the temperature sensing transistor to drive the temperature sensing transistor to be turned on. That is, after the control end (G terminal) controls the temperature sensing transistor to be turned on, the first end (S terminal) of the temperature sensing transistor collects the temperature data of the display panel under the driving of the conventional direct current, and converts the temperature data into a related electrical signal. Generally, the voltage range of the conventional direct current is -10V to +30V.

[0069] The second end (D terminal) of the temperature sensing transistor is coupled with the control circuit 10, for providing the electrical signal to the control circuit 10.

[0070] In the implementation process, after the temperature sensing transistor collects the temperature data of the display panel, the temperature data is further converted into a related electrical signal, and the electrical signal is provided to the second end (D terminal) of the control circuit 10, and through subsequent processing, a matched overdrive relationship table is called, and then the data line is loaded with the corresponding gray scale voltage of the different overdrive relationship tables.

[0071] Referring to Figure 4 the second case, the temperature sensor 20 comprises a temperature sensing transistor.

[0072] The control end (G terminal) of the temperature sensing transistor is coupled with the direct current power supply end.

[0073] In the implementation process, in order to ensure the normal operation of the temperature sensing transistor, a direct current is provided to the control end (G terminal) of the temperature sensing transistor, and the control end (G terminal) controls the conduction of the temperature sensing transistor. Generally, the voltage range of the direct current is -10V to +30V.

[0074] The first end (S terminal) of the temperature sensing transistor is coupled to the control circuit 10 and used to receive the pulse width modulation signal PWM.

[0075] In the implementation process, after the control circuit 10 generates and outputs the pulse width modulation signal PWM, the first end (S terminal) of the temperature sensing transistor coupled to the control circuit 10 receives the pulse width modulation signal PWM. When the pulse width modulation signal PWM is an active potential, the first end (S terminal) controls the temperature sensing transistor to collect the temperature data of the display panel and convert the temperature data into an associated electrical signal. When the pulse width modulation signal PWM is an inactive potential, the first end (S terminal) controls the temperature sensing transistor to stop the collection of the temperature data.

[0076] The second end (D terminal) of the temperature sensing transistor is coupled to the control circuit 10 and used to provide the electrical signal to the control circuit 10.

[0077] In the implementation process, after the temperature sensing transistor collects the temperature data of the display panel, the temperature data is further converted into an associated electrical signal, and the electrical signal is provided to the second end (D terminal) of the control circuit 10 and then retrieved to a matching overdrive relationship table through subsequent processing, so as to load the corresponding gray scale voltage of the different overdrive relationship tables to the data line.

[0078] Referring to Figure 5 The third case is shown in FIG. 3, in which the temperature sensor 20 includes a temperature sensing transistor;

[0079] The control end (G terminal) and the first end (S terminal) of the temperature sensing transistor are both coupled to the control circuit 10 and used to receive the pulse width modulation signal.

[0080] In the implementation process, after the control circuit 10 generates and outputs the pulse width modulation signal, the control end (G terminal) and the first end (S terminal) of the temperature sensing transistor coupled to the control circuit 10 both receive the pulse width modulation signal. Specifically, the pulse width modulation signal received by the control end (G terminal) is PWM1, and the pulse width modulation signal received by the first end (S terminal) is PWM2. Moreover, the phase of the pulse width modulation signal of the control end and the phase of the pulse width modulation signal of the first end are the same, that is, the phase of the pulse width modulation signal PWM1 and the phase of the pulse width modulation signal PWM2 are the same. In this way, when the temperature sensing transistor is turned on, the first end (S terminal) can start to work under the driving of the active potential.

[0081] When the pulse width modulation signal is at the active potential, the control end (G terminal) controls the temperature sensing transistor to turn on, and the first end (S terminal) controls the temperature sensing transistor to collect the temperature data of the display panel; when the pulse width modulation signal is at the inactive potential, the control end (G terminal) controls the temperature sensing transistor to turn off, and the first end (S terminal) controls the temperature sensing transistor to stop collecting the temperature data of the display panel.

[0082] The second end (D terminal) of the temperature sensing transistor is coupled with the control circuit 10, for providing an electrical signal to the control circuit 10.

[0083] In the implementation process, after the temperature sensing transistor collects the temperature data of the display panel, the temperature data is further converted into a related electrical signal, and the electrical signal is provided to the second end (D terminal) of the control circuit 10, and through subsequent processing, a matching overdrive relationship table is called, and then the data line is loaded with the corresponding gray scale voltage of the different overdrive relationship tables.

[0084] For the above-mentioned first case, second case and third case, it needs to be supplemented that, generally, the voltage value of the pulse width modulation signal output by the control circuit 10 is small, usually, the voltage value is 0-3.3V, the above-mentioned voltage value cannot drive the temperature sensor 20 to work, based on this, referring to Figure 6 As shown in the figure, a kind of driving control circuit 10 further includes potential conversion unit 30, and control circuit 10 is coupled with temperature sensor 20 by potential conversion unit 30.

[0085] Potential conversion unit 30 is configured to output the active potential of the pulse width modulation signal output by control circuit 10 after being raised to temperature sensor 20.

[0086] In the implementation process, potential conversion unit 30 raises the active potential of the received pulse width modulation signal, exemplarily, raises the high potential of the above-mentioned active potential to 20V to 30V, at the same time, pulls the low potential of the above-mentioned active potential to-10V to-4V, and outputs the raised pulse width modulation signal to temperature sensor 20.

[0087] In addition, for the above-mentioned first case, second case and third case, in the subsequent processing of the temperature sensing transistor providing the electrical signal to the control circuit 10, a kind of driving control circuit 10 further includes time sequence controller 40, and time sequence controller 40 is coupled with control circuit 10.

[0088] Control circuit 10 is configured to obtain the electrical signal output by the temperature sensing transistor, convert the electrical signal into a target value, and send the target value to time sequence controller 40.

[0089] In the implementation process, after the temperature sensing transistor outputs an electrical signal related to the collected temperature data of the display panel when the pulse width modulation signal is at the active potential, the control circuit 10 coupled to the second end of the temperature sensing transistor receives the electrical signal, and then converts the electrical signal into a target value, and sends the target value to the timing controller 40. The purpose of converting the electrical signal into the target value is to correspond to the gray scale data in the overdrive relationship table.

[0090] The timing controller 40 is configured to store the target value, select the overdrive relationship table matching the target value according to the period of the pulse width modulation signal, and control the display panel to display the picture according to the overdrive relationship table.

[0091] In the implementation process, the timing controller 40 pre-stores the overdrive relationship table, which is used to describe the relationship between the gray scale data of each pixel unit and the gray scale voltage. In the implementation process, after receiving the target value, the timing controller 40 stores the target value, and finds the matching overdrive relationship table according to the target value, that is, obtains the gray scale value corresponding to the target value, and then loads the gray scale voltage corresponding to the gray scale value on the data line connected to the pixel unit, so as to control the display panel to display the picture according to the gray scale voltage.

[0092] It should be noted that the period of selecting the matching overdrive relationship table according to the target value is the period of the pulse width modulation signal, that is, the overdrive relationship table is selected once in an active period of the pulse width modulation signal. Generally, the period of the pulse width modulation signal is 20-30 seconds. The reason is that the duty cycle of the pulse width modulation signal output by the control circuit 10 should not be too high, and the low level duration should be relatively long to avoid drift. At the same time, it should not be too low to avoid the control circuit 10 from being unable to collect the sampling value during the high level duration. For the frequency of the pulse width modulation signal output by the control circuit 10, it should not be too high, otherwise the leakage current between the gate and the drain of the temperature sensing transistor will gradually increase, which will affect the test accuracy of the temperature sensing transistor. In addition, according to the capacitive reactance formula Xc = 1 / (2πfC), a high-frequency signal may also cause short circuit of the parasitic capacitance between the metal wires in the display panel, abnormal leakage, and also affect the test accuracy of the temperature sensing transistor. Through actual test, 20-30 seconds is a relatively appropriate driving period.

[0093] Based on the same inventive concept, refer to Figure 7 The display device provided in the embodiment of the present disclosure includes a display panel 100 and the driving control circuit 500 of any one of the above.

[0094] The display device in the embodiment of the present application comprises a display panel 100 and a driving control circuit 500, the display panel 100 can be made of negative liquid crystal, positive liquid crystal and other materials, and is used for displaying a picture. In the process of displaying the picture by the display panel 100, the driving control circuit 500 collects temperature data of the display panel 100, and adjusts the gray scale voltage of the display panel 100 according to the electrical signal converted from the temperature data, so as to ensure the display quality of the picture.

[0095] The display panel 100 comprises a display area and a non-display area, at least one temperature sensing transistor is arranged in the non-display area, the display area comprises a display transistor, the display transistor is electrically connected with the gate line and the data line of the display area, and the temperature sensing transistor is made of the same material and in the same layer as the display transistor.

[0096] Exemplarily, the display panel 100 in the embodiment of the present application comprises a display area and a non-display area, generally, the non-display area is arranged below the display area, or the non-display area surrounds the periphery of the display area. The display area comprises a display transistor, generally, the number of the display transistors is multiple, the multiple display transistors are arranged in an array on a substrate, the display transistor is electrically connected with the gate line and the data line of the display area, and each display transistor is used for displaying a picture.

[0097] The temperature sensing transistor is made of the same material and in the same layer as the display transistor, generally, the temperature sensing transistor is also arranged on the substrate, in order to accurately measure the temperature data of the display panel 100, the temperature sensing transistor and the display transistor are located in the same layer of the substrate, and the temperature sensing transistor and the display transistor are made of the same material.

[0098] Exemplarily, referring to FIG. 1, Figure 8 As shown in the figure, the display device further comprises a first circuit board 501, a second circuit board 502 and a third circuit board 503; the first circuit board 501 is coupled with the display panel and the second circuit board 502, the second circuit board 502 is coupled with the third circuit board 503, and it can be known from the figure that the first circuit board 501, the second circuit board 502 and the third circuit board 503 are electrically connected through an I2C bus.

[0099] The first circuit board 501 comprises a sampling resistor and a sampling amplifier, the second circuit board 502 comprises a control circuit and a potential conversion unit, and the third circuit board 503 comprises a timing controller.

[0100] The temperature sensing transistor is coupled with the control circuit on the second circuit board 502 through the sampling resistor and the sampling amplifier on the first circuit board 501 and the third circuit board 503 in sequence.

[0101] The first circuit board 501 is coupled with the display panel 100 and the second circuit board 502, and the first circuit board 501 includes a sampling resistor and a sampling amplifier, and the first circuit board 501 is configured to convert the collected temperature data of the display panel 100 into an electrical signal when the pulse width modulation signal is an effective potential.

[0102] In the embodiment, the display panel 100 is coupled with the first circuit board 501 through a Chip On Flex (COF) or the like, and when the temperature sensing transistor is in an effective potential of the pulse width modulation signal, the temperature data of the display panel 100 is collected, and then the temperature data is converted by the sampling resistor 5011 and the sampling amplifier 5012 included in the first circuit board 501 to obtain the related electrical signal. The resistance range of the sampling resistor 5011 is between 1KΩ and 2MΩ, and the sampling resistor 5011 generates a related sampling voltage by sensing the change of the collected temperature data of the display panel 100, and the sampling amplifier 5012 amplifies the sampling voltage, so that the detected related electrical signal is more stable and accurate.

[0103] The second circuit board 502 is coupled with the first circuit board 501, and the second circuit board 502 includes a control circuit 10 and a potential conversion unit 5021, and the second circuit board 502 is configured to provide the pulse width modulation signal for the first circuit board 501, and convert the received electrical signal into a target value.

[0104] On the one hand, the control circuit in the second circuit board 502 outputs the pulse width modulation signal according to the preset duty cycle, and considering that the voltage value of the pulse width modulation signal directly output by the control circuit is limited, the voltage value of the pulse width modulation signal is further raised by the potential conversion unit to drive the temperature sensing transistor.

[0105] On the other hand, after obtaining the related electrical signal, the electrical signal is transmitted to the second circuit board 502 through the wire between the second circuit board 502 and the first circuit board 501, and then the control circuit in the second circuit board 502 converts the electrical signal into a target value.

[0106] The third circuit board 503 is coupled with the second circuit board 502, and the third circuit board 503 includes a timing controller 40, and the third circuit board 503 is configured to store the target value and control the display panel 100 to display a picture according to the overdrive relationship table matched with the target value.

[0107] In the embodiment of the present application, the third circuit board 503 can obtain the target value from the second circuit board 502 through a wire or the like, and then store the target value, and find a matching overdrive relationship table according to the target value, and control the display panel 100 to display a picture according to the corresponding gray scale data in the overdrive relationship table.

[0108] It should be noted that at least one of the first circuit board 501, the second circuit board 502 and the third circuit board 503 is a printed circuit board (PCB).

[0109] Based on the same inventive concept, referring to Figure 9 The embodiment of the present disclosure provides a driving control method, which comprises:

[0110] Step 201: The control circuit outputs a pulse width modulation signal according to a preset duty cycle.

[0111] In the implementation process, the control circuit converts the conventional direct current into a pulse width modulation signal according to a preset duty cycle, and outputs the pulse width modulation signal to the temperature sensor coupled thereto. Compared with the conventional direct current driving, the temperature sensor can be turned on at different times under the driving of the pulse width modulation signal, thereby slowing down the inaccuracy of the electrical signal caused by process decay.

[0112] Step 202: The temperature sensor receives the pulse width modulation signal, and outputs an electrical signal related to the temperature data of the display panel collected when the pulse width modulation signal is an effective potential.

[0113] In the implementation process, after receiving the pulse width modulation signal, the temperature sensor will only start working when the pulse width modulation signal is an effective potential, that is, the temperature data of the display panel is collected under the driving of the above-mentioned effective potential, and the temperature data is converted into a related electrical signal.

[0114] In summary, in the embodiment of the present disclosure, the driving control circuit, the display device and the driving control method are provided. The driving control circuit comprises: a control circuit and at least one temperature sensor, the control circuit is configured to output a pulse width modulation signal according to a preset duty cycle, and the temperature sensor is coupled with the control circuit and is configured to receive the pulse width modulation signal and output an electrical signal related to the temperature data of the display panel collected when the pulse width modulation signal is an effective potential. The above-mentioned temperature sensor is only turned on when the pulse width modulation signal is an effective potential, thereby avoiding the characteristic drift of the temperature sensor due to long-time opening, and affecting the accuracy of the output electrical signal, and further accurately matching the overdrive current related to the temperature, and effectively improving the quality of the display picture.

[0115] Those skilled in the art will appreciate that embodiments of the disclosure can be devised for a method, a system, or a computer program product system. Accordingly, the present disclosure can be embodied in the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure can take the form of a computer program product system on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, and the like) embodying computer readable program code.

[0116] The present disclosure is described in reference to the flowchart and / or block diagrams of the method, apparatus (system) and computer program product system according to the present disclosure. It should be understood that each flow and / or block in the flowchart and / or block diagrams, and a combination of flows and / or blocks in the flowchart and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions, which are executed via the processor of the computer or other programmable data processing apparatus, generate a means for implementing the functions specified in the flowchart and / or block diagrams of the flowchart and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 means for carrying out the function specified in the flow or flows and / or block or blocks.

[0117] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including an instruction means that implements the function specified in the flowchart and / or block diagrams of the flowchart and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 means for carrying out the function specified in the flow or flows and / or block or blocks.

[0118] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process so that the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart and / or block diagrams of the flowchart and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 means for carrying out the function specified in the flow or flows and / or block or blocks.

[0119] Obviously, various modifications and changes can be made to the present disclosure by those skilled in the art without departing from the spirit and scope of the present disclosure. Accordingly, it is intended that the present disclosure embrace all such modifications and changes that fall within the scope of the claims of the present disclosure and their equivalents.

Claims

1. A drive control circuit, characterized in that, include: Control circuitry and at least one temperature sensor; The control circuit is configured to output a pulse width modulation signal according to a preset duty cycle; The temperature sensor is coupled to the control circuit and is configured to receive the pulse width modulation signal and output an electrical signal related to the temperature data of the acquired display panel when the pulse width modulation signal is at an effective potential.

2. The circuit as described in claim 1, characterized in that, The temperature sensor is configured to turn off when the pulse width modulation signal is an invalid potential.

3. The circuit as described in claim 1, characterized in that, The temperature sensor includes a temperature sensing transistor; The control terminal of the temperature sensing transistor is coupled to the control circuit and is used to receive the pulse width modulation signal. The first terminal of the temperature sensing transistor is coupled to the DC power supply terminal; The second terminal of the temperature sensing transistor is coupled to the control circuit and is used to provide the electrical signal to the control circuit.

4. The circuit as described in claim 1, characterized in that, The temperature sensor includes a temperature sensing transistor; The first terminal of the temperature sensing transistor is coupled to the control circuit and is used to receive the pulse width modulation signal. The control terminal of the temperature sensing transistor is coupled to the DC power supply terminal; The second terminal of the temperature sensing transistor is coupled to the control circuit and is used to provide the electrical signal to the control circuit.

5. The circuit as described in claim 1, characterized in that, The temperature sensor includes a temperature sensing transistor; Both the control terminal and the first terminal of the temperature sensing transistor are coupled to the control circuit and are used to receive the pulse width modulation signal. The second terminal of the temperature sensing transistor is coupled to the control circuit and is used to provide the electrical signal to the control circuit.

6. The circuit as described in claim 5, characterized in that, The pulse width modulation signal at the control terminal and the pulse width modulation signal at the first terminal have the same phase.

7. The circuit according to any one of claims 1 to 6, characterized in that, It also includes a potential conversion unit; the control circuit is coupled to the temperature sensor through the potential conversion unit; The potential conversion unit is configured to increase the effective potential of the pulse width modulation signal output by the control circuit and then output it to the temperature sensor.

8. The circuit as described in claim 5, characterized in that, It also includes a timing controller, which is coupled to the control circuit; The control circuit is configured to acquire the electrical signal output by the temperature sensing transistor, convert the electrical signal into a target value, and send the target value to the timing controller; The timing controller is configured to store the target value, select an overdrive relationship table that matches the target value according to the period of the pulse width modulation signal, and control the display panel to display the screen according to the overdrive relationship table.

9. The circuit as described in claim 8, characterized in that, The period of the pulse width modulation signal is 20 to 30 seconds.

10. A display device, characterized in that, include: The display panel and the drive control circuit as described in any one of claims 1 to 9.

11. The display device as claimed in claim 10, characterized in that, The display panel includes a display area and a non-display area. At least one temperature sensing transistor is disposed in the non-display area. The display area includes a display transistor. The display transistor is electrically connected to the gate line and data line of the display area. The temperature sensing transistor is fabricated in the same layer and with the same material as the display transistor.

12. The display device as claimed in claim 11, characterized in that, The display device further includes a first circuit board, a second circuit board, and a third circuit board; the first circuit board is coupled to the display panel and the second circuit board, and the second circuit board is coupled to the third circuit board; The first circuit board includes a sampling resistor and a sampling amplifier; the second circuit board includes the control circuit and the potential conversion unit; and the third circuit board includes the timing controller. The temperature sensing transistor is sequentially coupled to the control circuit on the second circuit board via a sampling resistor and a sampling amplifier on the first circuit board, and the third circuit board.

13. A drive control method, characterized in that, include: The control circuit outputs a pulse width modulation signal according to a preset duty cycle; The temperature sensor receives the pulse width modulation signal and outputs an electrical signal related to the temperature data of the acquired display panel when the pulse width modulation signal is at an effective potential.

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