Gain control method, display device, and electronic device

Abstract

The application discloses a gain control method, a display device and electronic equipment, and belongs to the technical field of display. The gain control method comprises the following steps: acquiring data voltage corresponding to at least one row of display data in a next frame of display picture; determining whether the next frame of display picture is a heavy load picture or a light load picture based on the data voltage; in response to the next frame of display picture being the heavy load picture, increasing the output gain of a power supply chip; and in response to the next frame of display picture being the light load picture, decreasing the output gain of the power supply chip. In this way, different output gains are flexibly set according to the data voltage load condition of the next frame of picture, so that the high gain under the low load picture is avoided, and the high power consumption is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a gain control method, a display device and an electronic equipment. BACKGROUND

[0002] In the process of displaying a picture by a device, the output voltage stability is maintained based on the constant output gain in the use process of the power chip, which results in high power consumption in the display of various load pictures. SUMMARY

[0003] Embodiments of the present application provide a gain control method, a display device and an electronic equipment to solve the technical problem of high product power consumption.

[0004] According to a first aspect of embodiments of the present application, a gain control method is provided, including: obtaining a data voltage corresponding to at least one row display data in a next frame of display picture; determining whether the next frame of display picture is a heavy load picture or a light load picture based on the data voltage; increasing the output gain of a power chip in response to the next frame of display picture being the heavy load picture; and decreasing the output gain of the power chip in response to the next frame of display picture being the light load picture.

[0005] In a possible implementation, the determination of whether the next frame of display picture is the heavy load picture or the light load picture based on the data voltage includes: determining a number of rows of row display data in the data voltage reaching a predetermined range; determining the next frame of display picture as the heavy load picture in response to the number of rows reaching a predetermined value; and determining the next frame of display picture as the light load picture in response to the number of rows not reaching the predetermined value.

[0006] In a possible implementation, the obtaining of the data voltage corresponding to at least one row display data in the next frame of display picture includes: determining a polarity switching mode of a current display device; obtaining the data voltage corresponding to at least one even row display data in the next frame of display picture in response to the polarity switching mode being a first type of switching mode; and obtaining the data voltage corresponding to at least one odd row display data in the next frame of display picture in response to the polarity switching mode being a second type of switching mode.

[0007] In a possible implementation, the increasing of the output gain of the power chip in response to the next frame of display picture being the heavy load picture includes: switching an acknowledgement signal sent by a timing control chip to the power chip to a high level in response to the next frame of display picture being the heavy load picture; detecting, by the power chip, the switching of the acknowledgement signal to the high level, controlling a first switch module to be turned on, and connecting a gain signal to a predetermined resistance-capacitance module; and adjusting a resistance value and / or a capacitance value of the predetermined resistance-capacitance module to increase the output gain of the power chip.

[0008] In a possible implementation, the predetermined resistance-capacitance module comprises a variable resistance and / or a variable capacitance, and the step of inputting the gain signal into the predetermined resistance-capacitance module to increase the output gain of the power supply chip comprises: inputting the gain signal into the predetermined resistance-capacitance module; and adjusting the resistance value of the variable resistance and / or the capacitance value of the variable capacitance to increase the output gain of the power supply chip.

[0009] In a possible implementation, the step of decreasing the output gain of the power supply chip in response to the next frame of display picture being a light-load picture comprises: in response to the next frame of display picture being a light-load picture, switching a response signal sent by the timing control chip to the power supply chip to a low level; and detecting, by the power supply chip, that the response signal is switched to the low level, controlling the second switch module and the third switch module to be turned on, and grounding the gain signal to decrease the output gain of the power supply chip.

[0010] According to a second aspect of the embodiments of the present application, a display device is provided, which applies the gain control method according to any one of the preceding first aspect, and the display device comprises a timing control chip and a power supply chip connected to the timing control chip.

[0011] In a possible implementation, the display device further comprises a gain signal generation circuit, an input end of the gain signal generation circuit being configured to input an initial voltage signal; and the power supply chip comprises a gain adjustment circuit, an input end of the gain adjustment circuit being connected to an output end of the gain signal generation circuit and configured to input a gain signal, and an output end of the gain adjustment circuit being configured to output an adjusted gain signal.

[0012] In a possible implementation, the gain adjustment circuit comprises a first operational amplifier, a first switch module, a second operational amplifier, a second switch module, a third switch module, and a predetermined resistance-capacitance module; a first input end of the second operational amplifier is configured as an input end of the gain adjustment circuit and configured to input a gain signal; an output end of the second operational amplifier is connected to a second input end of the second operational amplifier and a first end of the second switch module respectively; a second end of the second switch module is connected to a first input end of the first operational amplifier and ground respectively; a second input end of the first operational amplifier is configured to input a gain signal; an output end of the first operational amplifier is connected to a first end of the third switch module and a first end of the predetermined resistance-capacitance module respectively; a second end of the predetermined resistance-capacitance module is configured to input a gain signal; and a third end of the predetermined resistance-capacitance module and a second end of the third switch module are configured to output an adjusted gain signal.

[0013] According to a third aspect of the embodiments of the present application, an electronic device is provided, comprising the display device of any one of the preceding second aspect.

[0014] The embodiments of the present application provide a gain control method, a display device and an electronic device. The gain control method comprises: obtaining a data voltage corresponding to at least one row of display data in a next frame of display picture; determining whether the next frame of display picture is a heavy load picture or a light load picture based on the data voltage; in response to the next frame of display picture being the heavy load picture, increasing the output gain of a power supply chip; and in response to the next frame of display picture being the light load picture, decreasing the output gain of the power supply chip. In this way, the load condition of the next frame of picture can be determined more accurately and efficiently by using the data voltage of the row of data, and different output gains can be flexibly set according to the load condition of the picture, so that the high power consumption caused by maintaining the high gain under the low load picture can be avoided, thereby reducing the overall power consumption of the display device. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which are included to provide a further understanding of the present application, form a part of the present application and illustrate the illustrative embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0016] Figure 1 is a flowchart of a gain control method provided by the embodiments of the present application;

[0017] Figure 2 is a signal diagram of heavy current load drawing provided by the embodiments of the present application;

[0018] Figure 3 is a schematic diagram of a compensation circuit provided by the embodiments of the present application;

[0019] Figure 4 is a structural schematic diagram of a display device provided by the embodiments of the present application;

[0020] Figure 5 is a schematic diagram of a gain adjustment circuit provided by the embodiments of the present application.

[0021] Legend of the accompanying drawings

[0022] 1, first operational amplifier; 2, first switch module; 3, second operational amplifier; 4, second switch module; 5, third switch module; 6, predetermined resistance-capacitance module. DETAILED DESCRIPTION

[0023] In order to enable a person skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor should fall within the scope of protection of the present application. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0024] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described 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 application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, product, or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product, or device.

[0025] In the present embodiment, a gain control method is provided, Figure 1 is a flowchart of a gain control method provided by the embodiments of the present application. As shown in Figure 1 , the method comprises:

[0026] S10: acquiring a data voltage corresponding to at least one row display data in a next frame display picture;

[0027] S20: determining whether the next frame display picture is a heavy load picture or a light load picture based on the data voltage;

[0028] S30: in response to the next frame display picture being a heavy load picture, increasing the output gain of the power chip;

[0029] S40: in response to the next frame display picture being a light load picture, reducing the output gain of the power chip.

[0030] In the present embodiment, the gain control method can be applied to a display device, for example, the display device can be a display panel, and the display device can include a timing control chip (Timing Controller integrated circuit, tcon IC) and a power chip (Power IC).

[0031] In the related art, when the polarity switching mode is a 2-line inversion mode, the polarity switching mode of the same column source signal line is positive-positive-negative-negative-positive-positive-negative-…, and when the maximum pressure difference of each polarity switching is the largest, a special picture appears. The load of the positive-negative polarity maximum pressure difference is the largest, for example, when the source line voltage is V7-V1-V8-V14 (or V1-V7-V14-V8) during positive-positive-negative-negative switching, the corresponding picture is H1by1, or one row of dark and one row of light.

[0032] As shown in the signal diagram shown in Figure 2 When a special picture is output, in order to enable the liquid crystal to deflect to a predetermined angle more quickly during positive-negative polarity switching to achieve faster charging operation, charge sharing is used, the adjacent two data channels are short-circuited, the voltage in the parasitic capacitance on the data line is neutralized, and is restored to the vicinity of the VCOM potential. When the gray scale voltage of the next frame is reversed, the gray scale voltages S n and S n-1 only need to be charged and discharged from the vicinity of the VCOM potential to the target voltage. When charge sharing is performed, the greater the pressure difference of the positive-negative polarity switching, the more serious the in-plane load, and the higher the load of the Power IC. The result of the high load of the IC is that the power consumption of the entire drive circuit becomes large, and the final power consumption of the product becomes large.

[0033] As shown in Figure 3 is a compensation circuit diagram. The so-called loop compensation is used to improve the stability, dynamic response and steady-state accuracy of the feedback control system. Since the input voltage needs to be lifted when a high voltage is output in the Power IC, for example, when the input is 12V (Vin voltage) and the output is 15V (Vout voltage, i.e. the voltage value of V1), loop compensation needs to be performed on the circuit to ensure the stability of the output voltage. G(s) and H(s) are compensation functions. When the load of the Power IC output becomes large (i.e. when the output picture is a heavy special picture), in order to ensure the stability of the voltage and reduce the ripple during continuous high-low voltage switching, loop compensation needs to be performed on the circuit. However, during compensation, the loop gain will increase, which will also cause the load of the Power IC to increase. At present, the compensation gain is fixed, and when the load is low, the high compensation gain will cause the load to increase in the opposite direction.

[0034] Here, the output gain of the power supply chip can refer to the output compensation gain of the power supply chip, which can be represented by the gain signal voltage value output by the power supply chip, for example.

[0035] In one embodiment, steps S10-S20 can be executed by the tcon IC, and steps S30-S40 can be executed by the tcon IC and / or the Power IC. In step S10, the data voltage corresponding to at least one row of display data in the next frame of display picture can be obtained through an overdrive table (OD table).

[0036] In one embodiment, the at least one row of display data can be at least one even row of display data, or can be at least one odd row of display data. Each row of display data corresponds to a data voltage.

[0037] In one embodiment, step S20 can include comparing the data voltage with a predetermined range, and determining whether the next frame of display picture is a heavy load picture or a light load picture based on whether the data voltage is in the predetermined range.

[0038] In one embodiment, the predetermined range can represent that the corresponding output picture is a white picture. For example, the predetermined range can be greater than or equal to a predetermined voltage value, where the predetermined voltage value can represent a data voltage value corresponding to a white picture, such as V1 or V14, etc.

[0039] In one embodiment, the step of determining whether the next frame of display picture is a heavy load picture or a light load picture based on whether the data voltage is in the predetermined range can include determining whether the next frame of display picture is a heavy load picture or a light load picture based on the number of rows of display data whose data voltage is in the predetermined range.

[0040] For example, when the number of rows of display data whose data voltage is in the predetermined range reaches a predetermined value or a predetermined proportion, it is determined that the next frame of display picture is a heavy load picture. Here, the predetermined proportion can refer to the ratio of the number of rows of display data whose data voltage is in the predetermined range to the total number of rows of the next frame of display picture.

[0041] In one embodiment, a heavy load picture can refer to a picture with a large load, such as a picture display with a large current draw, etc., and a light load picture can refer to a picture with a small load, such as a picture display without a large current draw, etc.

[0042] In one embodiment, step S30 can include adjusting the response signal sent by the timing control chip to the power supply chip to high level in response to the next frame of display picture being a heavy load picture, to instruct the power supply chip to increase the output gain.

[0043] In one embodiment, step S40 can include adjusting the response signal sent by the timing control chip to the power supply chip to low level in response to the next frame of display picture being a light load picture, to instruct the power supply chip to decrease the output gain.

[0044] In one embodiment, increasing the output gain of the power chip can refer to increasing the voltage value of the gain signal of the power chip; and decreasing the output gain of the power chip can refer to decreasing the voltage value of the gain signal of the power chip.

[0045] In this way, the load condition of the next frame of picture can be more accurately and efficiently determined by the data voltage of the row data, and different output gains can be flexibly set according to the picture load condition, so that the power consumption can be avoided to be too high due to the high gain maintained in the low load picture, thereby reducing the overall power consumption of the display device.

[0046] In some embodiments, the step S20 can include:

[0047] determining the number of rows of row display data whose data voltage reaches a predetermined range;

[0048] in response to the number of rows reaching a predetermined value, determining that the next frame of display picture is a heavy load picture;

[0049] in response to the number of rows not reaching the predetermined value, determining that the next frame of display picture is a light load picture.

[0050] In one embodiment, the predetermined range can refer to a range greater than or equal to a predetermined voltage value, for example, the predetermined voltage value can represent the data voltage value corresponding to a white picture, such as V1 or V14.

[0051] In one embodiment, the predetermined value can represent a predetermined number of rows, or can also represent a predetermined proportion of the total number of rows of the display picture, for example, the total number of rows of the display picture is 2160 rows, the predetermined value can be 1 / 2 of the total number of rows, i.e. 1080 rows, or can also be 1 / 4 of the total number of rows, i.e. 540 rows, etc.

[0052] In one embodiment, the predetermined value can be related to at least one of the following: the total number of rows of the display picture, whether the row display data is an odd row or an even row, and the occurrence frequency of the heavy load picture or the light load picture, etc.

[0053] In this way, when the number of row display data with high data voltage reaches the predetermined value, the picture can be more accurately represented as a heavy load picture, and the individual row data accidentally generating voltage rise can be avoided to misjudge as a heavy load picture, so as to ensure the matching of the gain and the display requirement of the picture and the accuracy of the gain control.

[0054] In some embodiments, the step S10 can include:

[0055] determining the polarity switching mode of the current display device;

[0056] in response to the polarity switching mode being a first type of switching mode, obtaining the data voltage corresponding to at least one even row display data in the next frame of display picture;

[0057] In response to the polarity switching mode being the second type of switching mode, data voltages corresponding to at least one odd-numbered row of display data in the next frame of display picture are obtained.

[0058] In one embodiment, the polarity switching mode represents a manner of switching the voltage polarity between different frames or rows, for example, the first type of switching mode can include a 2-line inversion switching mode, and the second type of switching mode can include a dot switching mode and a 3-line inversion switching mode.

[0059] In one embodiment, determining the polarity switching mode of the current display device can include: determining the polarity switching mode of the current display device by reading device information and / or control signals of the display device.

[0060] In one embodiment, the even-numbered row of display data can refer to a row of display data with an even row number, for example, the 2nd, 4th, 6th, and so on. The odd-numbered row of display data can refer to a row of display data with an odd row number, for example, the 1st, 3rd, 5th, and so on.

[0061] In one embodiment, obtaining the data voltages corresponding to at least one even-numbered row of display data in the next frame of display picture can refer to obtaining the data voltages corresponding to all even-numbered rows of display data in the next frame of display picture. Obtaining the data voltages corresponding to at least one odd-numbered row of display data in the next frame of display picture can refer to obtaining the data voltages corresponding to all odd-numbered rows of display data in the next frame of display picture.

[0062] In this way, different rows of display data are flexibly selected according to the polarity switching mode of the display device for voltage judgment, so that the determination result can be more in line with the actual situation of the picture, and the accuracy of gain control and picture display is improved.

[0063] In some embodiments, the step S30 can include:

[0064] In response to the next frame of display picture being a heavy load picture, switching an acknowledgement signal sent by the timing control chip to the power supply chip to a high level;

[0065] The power supply chip detects that the acknowledgement signal is switched to the high level, controls the first switch module to be turned on, and connects the gain signal to the predetermined resistance-capacitance module to improve the output gain of the power supply chip.

[0066] In one embodiment, the acknowledgement signal sent by the timing control chip to the power supply chip can be an Acknowledgment Character (ack), for example, represented as a gack signal.

[0067] In one embodiment, the detecting that the response signal switches to a high level can refer to detecting a rising edge of the response signal. The controlling the first switch module to be turned on can include: outputting a time signal TRR for responding to the response signal to reach a rising edge along with a rising edge of the response signal, and the first switch module being turned on in matching with the rising edge of the TRR.

[0068] In one embodiment, the controlling the first switch module to be turned on can further include: controlling the second switch module and the third switch module to be turned off.

[0069] In one embodiment, the predetermined resistance-capacitance module can include at least one resistance and at least one capacitance, and the predetermined resistance-capacitance module can be connected with one end of the first switch module, and the gain signal can be input to the predetermined resistance-capacitance module when the first switch module is turned on. Wherein, the at least one resistance can be a variable resistance, and the at least one capacitance can be a variable capacitance.

[0070] In one embodiment, the gain signal can be input to the power supply chip after being generated by a gain signal generation circuit. The gain signal generation circuit can include at least one resistance and one capacitance.

[0071] In this way, the high level of the response signal indicates that the power IC increases the gain, and the switch module in the power IC flexibly turns on different paths to improve the flexibility of gain control.

[0072] In some embodiments, the predetermined resistance-capacitance module includes a variable resistance and / or a variable capacitance, and the inputting the gain signal to the predetermined resistance-capacitance module to increase the output gain of the power supply chip includes:

[0073] Inputting the gain signal to the predetermined resistance-capacitance module;

[0074] Adjusting the resistance value of the variable resistance and / or the capacitance value of the variable capacitance to increase the output gain of the power supply chip.

[0075] Here, the adjusting the resistance value of the variable resistance and / or the capacitance value of the variable capacitance can include: adjusting the resistance value of the variable resistance and / or the capacitance value of the variable capacitance according to at least one of the following: the voltage value of the gain signal, the required adjusted gain signal voltage value, the number of row display data in which the data voltage reaches a predetermined range in the next frame of display picture, and the current resistance value of the variable resistance and / or the current capacitance value of the variable capacitance, etc.

[0076] In one embodiment, the adjusted gain signal voltage value output by the power supply chip after the first switch module is turned on can represent the output gain of the power supply chip.

[0077] In one embodiment, the resistance value of the variable resistor and / or the capacitance value of the variable capacitor can be adjusted through a register of the power supply chip.

[0078] In this way, the output gain can be adjusted more flexibly and accurately by the variable resistor and the variable capacitor, so as to further improve the matching degree of the output gain and the actual display condition and reduce unnecessary power consumption.

[0079] In some embodiments, the step S40 can include:

[0080] In response to the next frame display picture being a light load picture, switching a response signal sent by the timing control chip to the power supply chip to a low level;

[0081] The power supply chip detects that the response signal is switched to the low level, controls the second switch module and the third switch module to be turned on, and grounds the gain signal to reduce the output gain of the power supply chip.

[0082] In one embodiment, detecting that the response signal is switched to the low level can refer to detecting a falling edge of the response signal. Controlling the second switch module and the third switch module to be turned on can include: outputting a time signal TRR for responding to the response signal, the time signal TRR reaching a falling edge along with a falling edge of the response signal, and the second switch module and the third switch module being turned on in matching with the falling edge of the TRR.

[0083] In one embodiment, when the second switch module and the third switch module are controlled to be turned on, the first switch module can also be controlled to be turned off.

[0084] In one embodiment, the voltage value of the adjusted gain signal output by the power supply chip after the second switch module and the third switch module are turned on can represent the output gain of the power supply chip.

[0085] In one embodiment, one end of at least one of the second switch module and the third switch module is grounded.

[0086] In this way, the power IC reduces the gain through the low level indication of the response signal, and improves the gain control flexibility by flexibly turning on different paths through the switch modules in the power IC.

[0087] Embodiments of the present application provide a display device applying the gain control method of any one or more of the preceding embodiments. The display device includes a timing control chip and a power supply chip connected to the timing control chip.

[0088] In one embodiment, the timing control chip can be configured to acquire a data voltage corresponding to at least one row of display data in a next frame display picture; and determine whether the next frame display picture is a heavy load picture or a light load picture based on the data voltage.

[0089] In some embodiments, as shown in Figure 4 the display device further comprises: a gain signal generation circuit, an input end of the gain signal generation circuit being configured to input an initial voltage signal;

[0090] The power supply chip comprises: a gain adjustment circuit, an input end of the gain adjustment circuit being connected to an output end of the gain signal generation circuit and configured to input a gain signal, and an output end of the gain adjustment circuit being configured to output an adjusted gain signal.

[0091] In one embodiment, the gain signal generation circuit comprises at least a resistor and a capacitor connected in series.

[0092] In one embodiment, the adjusted gain signal output by the gain adjustment circuit is a voltage signal Vout required to be output by the power supply chip.

[0093] In this way, the output gain of the voltage signal by the power supply chip is flexibly adjusted by the gain adjustment circuit, thereby reducing the power consumption of the power supply chip.

[0094] In some embodiments, as shown in Figure 5 the gain adjustment circuit comprises: a first operational amplifier 1, a first switch module 2, a second operational amplifier 3, a second switch module 4, a third switch module 5, and a predetermined resistor-capacitor module 6.

[0095] The first input end of the second operational amplifier 3 serves as an input end of the gain adjustment circuit and is configured to input a gain signal; and the output end of the second operational amplifier 3 is connected to the second input end of the second operational amplifier 3 and the first end of the second switch module 4 respectively.

[0096] The second end of the second switch module 4 is connected to the first input end of the first operational amplifier 1 and the ground respectively; the second input end of the first operational amplifier 1 is configured to input a gain signal; and the output end of the first operational amplifier 1 is connected to the first end of the third switch module 5 and the first end of the predetermined resistor-capacitor module 6 respectively.

[0097] The second end of the second switch module 4 is connected to the first input end of the first operational amplifier 1 and the ground respectively; the second input end of the first operational amplifier 1 is configured to input a gain signal; and the output end of the first operational amplifier 1 is connected to the first end of the third switch module 5 and the first end of the predetermined resistor-capacitor module 6 respectively.

[0098] In one embodiment, the second end of the second switch module 4 is connected to the ground, which can mean that the second end of the second switch module 4 is connected to the ground through a capacitor.

[0099] In one embodiment, the resistance R included in the predetermined resistance-capacitance module 6 can be a variable resistance, and the capacitance C included in the predetermined resistance-capacitance module 6 can be a variable capacitance. The two ends of the resistance included in the predetermined resistance-capacitance module 6 are the first end and the second end of the predetermined resistance-capacitance module 6, respectively, and the two ends of the capacitance included in the predetermined resistance-capacitance module 6 are the first end and the third end of the predetermined resistance-capacitance module 6, respectively.

[0100] In one embodiment, an operational amplifier (OP) can be used to compare the signal voltage values input by the first input end and the second input end, and output a signal with a larger or smaller voltage value.

[0101] Here, the first input end of the operational amplifier can be a positive input end, and the second input end can be a negative input end.

[0102] In this way, by using the multiple switch modules for gating, different switch modules can be flexibly determined according to different response signal levels corresponding to different display pictures, so that the gain signal is grounded when the response signal is at a low level to reduce the gain, and the gain signal is connected to the predetermined resistance-capacitance module 6 for adjustment when the response signal is at a high level to increase the gain.

[0103] The embodiments of the present application also provide an electronic device, wherein the electronic device includes the display device of any one or more of the preceding embodiments.

[0104] Here, the electronic device can be any device with display function, such as a mobile phone, a watch, a tablet computer, a television or a notebook computer, etc.

[0105] As one possible implementation, the embodiments provide a method for reducing the output load and power consumption of a Power IC, comprising:

[0106] Picture detection: for 2 line inversion switching mode, if the voltage of even line is white picture voltage, i.e. V1 or V14, then there will be large current draw when charge sharing is done before the next line is displayed, so if the voltage of even line can be confirmed, then whether the picture is special picture which will cause large current draw can be confirmed. When the current frame is displayed, tcon IC reads the data of next frame by OD table, compares the data voltage line by line, and then compares the data of even line with V1 and V14. When one of the differences is equal to 0, it means that there will be large current draw in this line and it is recorded as H1, and the detection of each line is recorded as H2, H3…Hn. When all the lines with large current draw are recorded as H1 to Hn, tcon IC counts all the lines. When the number of lines with large current draw (defined as Hm) is greater than a certain percentage, it can be considered that the picture is a special picture. For example, the number of product lines is 2160, and the number of even lines is 2160 / 2=1080, when Hn / 1080≥50%, it can be considered that the large current draw of intermittent multiple lines will make the power consumption large. In addition, when doing picture detection, tcon IC first confirms the point of load (POL) which is about to be switched (dot, 2 line, 3 line), when it is confirmed that POL is dot or 3 line inversion, then the data of odd line is compared to confirm whether there will be large current draw; when it is confirmed that POL is 2 line inversion, then the data of even line is compared to confirm whether there is a picture with large current draw. In this way, by automatically detecting the switching mode of POL, it can be selected to detect even or odd line, and picture detection is performed.

[0107] Specific scheme: a variable resistance-capacitance RC module is arranged in the power IC, which is used to adjust compensation (comp) gain, and the size of the comp, i.e. output gain, is controlled by a gack signal input by tcon, when the rising edge of gack comes, the comp is lifted to a high gain state to meet the demand of heavy load picture and ensure the stability of high voltage ripple, when the falling edge of gack comes, the comp is connected with gnd to make the comp become a low gain state to reduce the power IC power consumption. At the same time, the output level of TRR signal is controlled by controlling tcon to send gack signal, when the level of gack changes from high to low, the TRR signal responds as falling edge, at this time, the comp is quickly connected with gnd to speed up the comp change process; when the level of gack changes from low to high, the TRR signal responds as rising edge, the comp is quickly charged by the built-in OP to achieve high gain. When the detected picture is a light load picture, the in-plane extraction load is small, gack outputs a square wave, after power receives the signal of tcon, the TRR falling edge is output according to the level, the comp is grounded to reduce the gain. When the detected picture is a heavy load picture, the in-plane extraction load is large, gack is output to the power IC, the TRR enters rising edge, the internal adjustable RC is adjusted to improve the gain to keep the output voltage stable.

[0108] Those skilled in the art can clearly understand the method according to the above-mentioned embodiments can be realized by means of software and necessary general hardware platform, of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application or the part that contributes to the prior art can be embodied in the form of software product, which is stored in a storage medium (such as ROM / RAM, magnetic disc, optical disc), including a plurality of instructions to make a terminal device (which can be a mobile phone, computer, server, or network device, etc.) execute the method described in various embodiments of the present application.

[0109] The above only describes the preferred embodiments of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is included in the protection scope of the present application.

[0110] The foregoing detailed description of the application has been presented for purposes of illustration and description. Various modifications and changes can be made to these embodiments without departing from the spirit and scope of the application. It is intended that the scope of the application should not be limited by the particular representative embodiments described above.

Claims

1. A gain control method, characterized in that, The method includes: Obtain the data voltage corresponding to at least one row of displayed data in the next frame of the display screen; Based on the data voltage, determine whether the next frame to be displayed is a heavily loaded or lightly loaded frame; In response to the next frame being a reloaded frame, the output gain of the power chip is increased; In response to the next frame being a lightly loaded frame, the output gain of the power chip is reduced; The power chip includes: a gain adjustment circuit; The gain adjustment circuit includes: a first operational amplifier, a first switching module, a second operational amplifier, a second switching module, a third switching module, and a predetermined resistor-capacitor module; The first input terminal of the second operational amplifier serves as the input terminal of the gain adjustment circuit, used to input a gain signal; the output terminal of the second operational amplifier is connected to the second input terminal of the second operational amplifier and the first terminal of the second switching module, respectively. The second terminal of the second switch module is connected to the first input terminal of the first operational amplifier and ground, respectively; the second input terminal of the first operational amplifier is used to input a gain signal; the output terminal of the first operational amplifier is connected to the first terminal of the third switch module and the first terminal of the predetermined resistor-capacitor module, respectively. The second terminal of the predetermined resistor-capacitor module is used to input a gain signal; the third terminal of the predetermined resistor-capacitor module and the second terminal of the third switch module are used to output an adjusted gain signal. The response to the next frame being a reloaded frame, increasing the output gain of the power chip, includes: In response to the next frame being a reloaded frame, the response signal sent by the timing control chip to the power chip is switched to a high level; The power chip detects that the response signal has switched to a high level, controls the first switch module to turn on, and connects the gain signal to the predetermined resistor-capacitor module to improve the output gain of the power chip.

2. The method according to claim 1, characterized in that, The step of determining whether the next frame to be displayed is a heavy-load or light-load frame based on the data voltage includes: Determine the number of rows of data to be displayed where the data voltage reaches a predetermined range; In response to the number of rows reaching a predetermined value, the next frame of display is determined to be a reloaded frame; In response to the fact that the number of rows has not reached a predetermined value, the next frame of display is determined to be a light-load frame.

3. The method according to claim 1, characterized in that, The step of obtaining the data voltage corresponding to at least one row of display data in the next frame of the display screen includes: Determine the current polarity switching mode of the display device; In response to the polarity switching mode being the first type of switching mode, the data voltage corresponding to at least one even-numbered row of display data in the next frame of the display screen is obtained; In response to the polarity switching mode being the second type of switching mode, the data voltage corresponding to at least one odd-numbered row of display data in the next frame of the display screen is obtained.

4. The method according to claim 1, characterized in that, The predetermined resistor-capacitor module includes: a variable resistor and / or a variable capacitor. The step of connecting the gain signal to the predetermined resistor-capacitor module to improve the output gain of the power chip includes: Connect the gain signal to the predetermined resistor-capacitor module; Adjusting the resistance value of the variable resistor and / or the capacitance value of the variable capacitor can improve the output gain of the power supply chip.

5. The method according to claim 1, characterized in that, The response to the next frame being a lightly loaded frame, reducing the output gain of the power chip, includes: In response to the next frame being a light-loaded frame, the response signal sent by the timing control chip to the power chip is switched to a low level; The power chip detects that the response signal has switched to a low level, controls the second and third switch modules to turn on, and grounds the gain signal to reduce the output gain of the power chip.

6. A display device, characterized in that, The display device, using the gain control method according to any one of claims 1 to 5, includes a timing control chip and a power supply chip connected to the timing control chip.

7. The display device according to claim 6, characterized in that, The display device further includes: a gain signal generation circuit, wherein the input terminal of the gain signal generation circuit is used to input an initial voltage signal; The input terminal of the gain adjustment circuit is connected to the output terminal of the gain signal generation circuit and is used to input a gain signal; the output terminal of the gain adjustment circuit is used to output the adjusted gain signal.

8. An electronic device, characterized in that, The electronic device includes the display device according to any one of claims 6 to 7.

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