Gain control method, display device and electronic equipment

Abstract

The invention 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 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 situation that the next frame of display picture is a heavy-load picture, improving the output gain of a power supply chip; and reducing the output gain of a power supply chip in response to the condition that the next frame of display picture is a light-load picture. In this way, different output gains are flexibly set according to the data voltage load condition of the next frame of picture, and therefore the situation that power consumption is too high due to the fact that high gains are still kept under a low-load picture is avoided.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a gain control method, a display device and an electronic device. Background Art

[0002] During the display of images on the device, the current power supply chip maintains the stability of the output voltage based on a continuous output gain during use, resulting in higher power consumption in the display of various load images. Summary of the invention

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

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

[0005] In one possible embodiment, determining whether the next frame of display screen is a heavy-load screen or a light-load screen based on the data voltage includes: determining the number of rows of display data for which the data voltage reaches a predetermined range; in response to the number of rows reaching a predetermined value, determining that the next frame of display screen is a heavy-load screen; in response to the number of rows not reaching a predetermined value, determining that the next frame of display screen is a light-load screen.

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

[0007] In one possible implementation, in response to the next frame display screen being a reloaded screen, improving the output gain of the power chip includes: in response to the next frame display screen being a reloaded screen, switching the response signal sent by the timing control chip to the power chip to a high level; the power chip detects that the response signal switches to a high level, controls the first switch module to turn on, and connects the gain signal to a predetermined resistor-capacitor module; adjusts the resistance value and / or capacitance value of the predetermined resistor-capacitor module to improve the output gain of the power chip.

[0008] In one possible implementation, the predetermined resistor-capacitor module includes: a variable resistor and / or a variable capacitor, and connecting the gain signal to the predetermined resistor-capacitor module to increase the output gain of the power chip includes: connecting 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 to increase the output gain of the power chip.

[0009] In one possible embodiment, in response to the next frame display image being a light-load image, reducing the output gain of the power chip includes: in response to the next frame display image being a light-load image, switching the response signal sent by the timing control chip to the power chip to a low level; the power chip detects that the response signal switches to a 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 chip.

[0010] According to a second aspect of an embodiment of the present application, a display device is provided, applying the gain control method described in any one of the first aspects, the display device comprising a timing control chip and a power supply chip connected to the timing control chip.

[0011] In a possible implementation, the display device further includes: a gain signal generating circuit, the input end of the gain signal generating circuit being used to input an initial voltage signal; the power supply chip includes: a gain adjustment circuit; the input end of the gain adjustment circuit is connected to the output end of the gain signal generating circuit for inputting a gain signal; the output end of the gain adjustment circuit is used to output an adjusted gain signal.

[0012] In a possible implementation, the gain adjustment circuit includes: a first operational amplifier, a first switch module, a second operational amplifier, a second switch module, a third switch module and a predetermined resistor-capacitor module; the first input end of the second operational amplifier serves as the input end of the gain adjustment circuit and is used to input a gain signal; the output end of the second operational amplifier is respectively connected to the second input end of the second operational amplifier and the first end of the second switch module; the second end of the second switch module is respectively connected to the first input end of the first operational amplifier and ground; the second input end of the first operational amplifier is used to input a gain signal; the output end of the first operational amplifier is respectively connected to the first end of the third switch module and the first end of the predetermined resistor-capacitor module; the second end of the predetermined resistor-capacitor module is used to input a gain signal; the third end of the predetermined resistor-capacitor module and the second end of the third switch module are used 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 described in any one of the second aspects above.

[0014] The embodiment of the present application proposes a gain control method, a display device and an electronic device, the gain control method comprising: obtaining a data voltage corresponding to at least one row of display data in the next frame of display screen; determining whether the next frame of display screen is a heavy-load screen or a light-load screen based on the data voltage; in response to the next frame of display screen being a heavy-load screen, increasing the output gain of the power chip; in response to the next frame of display screen being a light-load screen, reducing the output gain of the power chip. In this way, judging the load condition of the next frame of screen by the data voltage of the row data can be more accurate and efficient, and different output gains can be flexibly set according to the screen load condition, which can avoid maintaining high gain under low-load screens and causing excessive power consumption, thereby reducing the overall power consumption of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 is a flow chart of a gain control method provided in an embodiment of the present application;

[0017] Figure 2 This is a signal diagram of a high current draw provided by an embodiment of the present application;

[0018] Figure 3 is a schematic diagram of a compensation circuit provided in an embodiment of the present application;

[0019] Figure 4 is a structural schematic diagram of a display device provided in an embodiment of the present application;

[0020] Figure 5 It is a schematic diagram of a gain adjustment circuit provided in an embodiment of the present application.

[0021] Description of Reference Numerals

[0022] 1. A first operational amplifier; 2. A first switch module; 3. A second operational amplifier; 4. A second switch module; 5. A third switch module; 6. A predetermined resistor-capacitor module. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] In this embodiment, a gain control method is provided. Figure 1 is a flow chart of a gain control method provided in an embodiment of the present application. Figure 1 As shown, the method includes:

[0026] S10: Obtaining a data voltage corresponding to at least one row of display data in a next frame of 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 this embodiment, the gain control method may be applied to a display device. For example, the display device may be a display panel. The display device may include a timing controller integrated circuit (tcon IC) and a power chip (Power IC).

[0031] In the related art, when the polarity switching mode is 2line inversion, the polarity switching mode of the source signal line in the same column is positive-positive-negative-negative-positive-negative-negative... When the voltage difference of each polarity switching is the largest, a special picture will appear. When the maximum voltage difference of positive and negative polarity is pulled, the load will be the largest. For example, when the source line voltage is V7-V1-V8-V14 (or V1-V7-V14-V8) when switching between positive-positive-negative-negative, the corresponding picture is one row bright and one row dark (H1by1), or one row dark and one row bright.

[0032] like Figure 2 As shown in the signal diagram, when a special picture is output, in order to allow the liquid crystal to deflect to a predetermined angle faster when the positive and negative polarities are switched to complete the charging action faster, charge sharing is adopted. The two adjacent data channels are short-circuited, and the voltage in the parasitic capacitor on the data line is neutralized and restored to the vicinity of the VCOM potential. When the grayscale voltage of the next frame is reversed, the positive and negative grayscale voltages S n and S n-1 They only need to charge and discharge from near VCOM potential to the target voltage. When performing charge sharing, the greater the voltage difference between positive and negative polarity switching, the more serious the surface loading will be, and the load on the Power IC will be higher. The result of high reverse load on the IC is that the power consumption of the entire drive circuit increases, and the final power consumption of the product increases.

[0033] like Figure 3 The figure shows a schematic diagram of the compensation circuit. 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 raised when the Power IC outputs a high voltage, for example, when the input is 12V (Vin voltage) and the output is 15V (Vout voltage, that is, the voltage value of V1 mentioned above), the circuit needs to be loop compensated to ensure the stability of the output voltage. G(s) and H(s) are both compensation functions. When the output load of the Power IC becomes larger (that is, when the output screen is a heavy-load special screen), in order to ensure the stability of the voltage and reduce the ripple when switching between high and low voltages, the circuit needs to be loop compensated. However, during compensation, its loop gain will increase, which will also cause the load of the Power IC to increase. At present, the gain of compensation is fixed. When the load becomes lower, the higher compensation gain will cause the load to increase in the opposite direction.

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

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

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

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

[0038] The predetermined range may indicate that the corresponding output image is a white image. For example, the predetermined range may be greater than or equal to a predetermined voltage value, where the predetermined voltage value may represent a data voltage value corresponding to the white image, such as V1 or V14.

[0039] In one embodiment, in the above steps, determining whether the next frame display image is a heavy-load image or a light-load image based on whether the data voltage is within the predetermined range may include: determining whether the next frame display image is a heavy-load image or a light-load image based on the number of rows of row display data whose data voltage is within the predetermined range.

[0040] For example, when the number of rows of row display data with data voltage in the predetermined range reaches a predetermined value or a predetermined ratio, the next frame display picture is determined to be a reloaded picture. Here, the predetermined ratio may refer to the ratio of the number of rows of row display data with data voltage in the predetermined range to the total number of rows of the next frame display picture.

[0041] In one embodiment, a heavy-loaded image may refer to an image with a larger load, such as an image showing a large current draw, and a light-loaded image may refer to an image with a smaller load, such as an image showing no large current draw.

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

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

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

[0045] In this way, judging the load condition of the next frame of the picture by the data voltage of the row data can be more accurate and efficient, and different output gains can be flexibly set according to the picture load condition to avoid maintaining high gain under low-load pictures and causing excessive power consumption, thereby reducing the overall power consumption of the display device.

[0046] In some embodiments, step S20 may include:

[0047] Determine the number of rows of row display data for which the 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 reloaded picture;

[0049] In response to the number of rows not reaching a predetermined value, the next frame of display picture is determined to be a light-load picture.

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

[0051] In one embodiment, the predetermined value may represent a predetermined number of rows, or may also represent a predetermined ratio of the total number of rows of the display screen. For example, if the total number of rows of the display screen is 2160 rows, the predetermined value may be 1 / 2 of the total number of rows, i.e., 1080 rows, or may be 1 / 4 of the total number of rows, i.e., 540 rows, etc.

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

[0053] In this way, when the number of rows of display data with higher data voltage reaches a predetermined value, the screen can be more accurately characterized as an overloaded screen, avoiding accidental voltage increase of individual row data leading to misjudgment as an overloaded screen, thereby ensuring the matching of gain with screen display requirements and the accuracy of gain control.

[0054] In some embodiments, step S10 may include:

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

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

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

[0058] In one embodiment, the polarity switching method represents the method of switching the voltage polarity between different frames or rows. For example, the first type of switching method may include a 2line inversion switching method, and the second type of switching method may include a dot switching method and a 3line inversion switching method.

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

[0060] In one embodiment, even-numbered row display data may refer to row display data with even numbers, such as the 2nd, 4th, 6th row, etc. Odd-numbered row display data may refer to row display data with odd numbers, such as the 1st, 3rd, 5th row, etc.

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

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

[0063] In some embodiments, step S30 may include:

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

[0065] The power chip detects that the response signal switches to a high level, controls the first switch module to be turned on, and connects the gain signal to a predetermined resistor-capacitor module to increase the output gain of the power chip.

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

[0067] In one embodiment, detecting that the response signal switches to a high level may refer to detecting a rising edge of the response signal. Controlling the first switch module to turn on may include: outputting a time signal TRR for responding to the response signal reaches a rising edge along with the rising edge of the response signal, and the first switch module matching the rising edge of TRR is turned on.

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

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

[0070] In one embodiment, the gain signal may be generated by a gain signal generating circuit and then input into the power chip. The gain signal generating circuit may include at least one resistor and one capacitor.

[0071] In this way, the high level of the response signal instructs the power IC to increase the gain, and the switch module in the Power IC flexibly conducts different paths, thereby improving the flexibility of gain control.

[0072] In some embodiments, the predetermined resistor-capacitor module includes: a variable resistor and / or a variable capacitor, and the step of connecting the gain signal to the predetermined resistor-capacitor module to increase the output gain of the power chip includes:

[0073] Connecting the gain signal to a predetermined resistor-capacitor module;

[0074] The resistance value of the variable resistor and / or the capacitance value of the variable capacitor are adjusted to improve the output gain of the power chip.

[0075] Here, adjusting the resistance value of the variable resistor and / or the capacitance value of the variable capacitor may include: adjusting the resistance value of the variable resistor and / or the capacitance value of the variable capacitor according to at least one of the following: the voltage value of the gain signal, the voltage value of the gain signal after adjustment, the number of rows of display data in the next frame display screen whose data voltage reaches a predetermined range, and the current resistance value of the variable resistor and / or the current capacitance value of the variable capacitor, etc.

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

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

[0078] In this way, the output gain can be adjusted more flexibly and accurately through the variable resistor and the variable capacitor, thereby further improving the matching degree between the output gain and the actual display situation and reducing unnecessary power consumption.

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

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

[0081] The power chip detects that the response signal switches to a 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 chip.

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

[0083] In one embodiment, when controlling the second switch module and the third switch module to be turned on, the method may further include: controlling the first switch module to be turned off.

[0084] In one embodiment, the adjusted gain signal voltage value output by the power chip after the second switch module and the third switch module are turned on can represent the output gain of the power 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 low level of the response signal instructs the power IC to reduce the gain, and the switch module in the Power IC flexibly conducts different paths, thereby improving the flexibility of gain control.

[0087] An embodiment of the present application provides a display device, applying the gain control method described in any one or more of the above embodiments, and the display device includes a timing control chip and a power chip connected to the timing control chip.

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

[0089] In some embodiments, Figure 4 As shown, the display device further includes: a gain signal generating circuit, wherein the input end of the gain signal generating circuit is used to input an initial voltage signal;

[0090] The power chip comprises: a gain adjustment circuit; the input end of the gain adjustment circuit is connected to the output end of the gain signal generating circuit for inputting a gain signal; the output end of the gain adjustment circuit is used for outputting an adjusted gain signal.

[0091] In one embodiment, the gain signal generating circuit includes 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 the voltage signal Vout that the power chip needs to output.

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

[0094] In some embodiments, Figure 5 As shown, the gain adjustment circuit includes: 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 is used as the input end of the gain adjustment circuit for inputting a gain signal; the output end of the second operational amplifier 3 is respectively connected to the second input end of the second operational amplifier 3 and the first end of the second switch module 4;

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

[0097] The second end of the predetermined resistor-capacitor module 6 is used to input a gain signal; the third end of the predetermined resistor-capacitor module 6 and the second end of the third switch module 5 are used to output an adjusted gain signal.

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

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

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

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

[0102] In this way, by selecting multiple switch modules, different switch modules can be flexibly selected for different response signal levels corresponding to different display screens, 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 resistor-capacitor module 6 for adjustment when the response signal is at a high level to increase the gain.

[0103] An embodiment of the present application further provides an electronic device, wherein the electronic device includes the display device described in any one or more of the aforementioned embodiments.

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

[0105] As a possible implementation, this embodiment provides a method for reducing the output load and power consumption of a Power IC, including:

[0106] Screen detection: For the 2-line inversion switching mode, as long as the output voltage of the even-numbered lines is the white screen voltage, that is, V1 or V14, a large current draw will occur when charge sharing is performed before the next line is displayed. Therefore, as long as the voltage of the even-numbered lines can be confirmed, it can be confirmed whether a special screen will produce a large current draw. When the current frame is displayed, the tcon IC reads the data displayed in the next frame through the OD table, compares the data voltage line by line, and then uses the data read from the even-numbered lines to make a difference with the V1 and V14 voltages. When one of the differences is equal to 0, it means that this line of data will have a large draw and is recorded as H1. The detection of each line is recorded as H2, H3...Hn; after recording all the H1 to Hn lines with large draws, the tcon IC counts all the lines. When the number of lines with large draws recorded (defined as Hm) is greater than a certain ratio, it can be considered that the screen is a special screen. For example, there are 2160 rows in total, and there are 2160 / 2=1080 even rows. When Hn / 1080≥50%, it can be considered that intermittent large loads on multiple rows will increase power consumption. In addition, when doing screen detection, tconIC first confirms the polarity switching mode (dot, 2line, 3line) of the load point (Point-of-load, POL). When it is confirmed that POL is dot or 3line inversion, it compares the data of odd rows to confirm whether large loads will occur; when it is confirmed that POL is 2line inversion, it compares the data of even rows to confirm whether a large load screen will appear. In this way, you can automatically detect the switching mode of POL and choose to detect even or odd rows and perform screen detection.

[0107] Specific solution: a variable resistor-capacitor RC module is set in the power IC to adjust the compensation (Comp) gain. The gack signal input by tcon is used to control the size of the output gain of comp. When the rising edge of gack comes, comp is raised to a high gain state to meet the needs of heavy-load screens and ensure the stability of high-voltage ripple. When the falling edge of gack comes, comp is connected to gnd to change comp to a low gain state to reduce the power IC power consumption. At the same time, the output level of the TRR signal is controlled by controlling tcon to send a gack signal. When the gack level changes from high to low, the TRR signal responds to the falling edge falling. At this time, comp is quickly connected to the ground gnd to accelerate the comp change process; when the gack level changes from low to high, the TRR signal responds to the rising edge rising. The built-in OP quickly charges comp to achieve high gain. When the detected screen is a light-load screen, the internal load is small, and gack outputs a square wave. After receiving the signal from tcon, the power outputs TRRfalling according to the level, connects comp to ground, and reduces the gain. When the detected screen is a heavy-load screen, the on-plane load is large, gack is output to the powerIC, TRR enters the rising edge, and the internal variable RC is adjusted to increase the gain and keep the output voltage stable.

[0108] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0109] The above description is only a preferred embodiment of the present application and is not intended 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 are included in the protection scope of the present application.

[0110] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A gain control method, characterized in that: The method comprises: Acquire a data voltage corresponding to at least one row of display data in a next frame of display picture; Determine 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 display picture being a heavy-load picture, increasing the output gain of the power chip; In response to the next frame display picture being a light-load picture, the output gain of the power chip is reduced.

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

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

4. The method according to claim 1, characterized in that In response to the next frame display picture being a heavy-load picture, increasing the output gain of the power chip includes: In response to the next frame display picture being a heavy-load picture, switching the response signal sent by the timing control chip to the power chip to a high level; The power chip detects that the response signal switches to a high level, controls the first switch module to be turned on, and connects the gain signal to a predetermined resistor-capacitor module to increase the output gain of the power chip.

5. The method according to claim 4, characterized in that The predetermined resistor-capacitor module includes: a variable resistor and / or a variable capacitor, and the gain signal is connected to the predetermined resistor-capacitor module to increase the output gain of the power chip, including: Connecting the gain signal to a predetermined resistor-capacitor module; The resistance value of the variable resistor and / or the capacitance value of the variable capacitor are adjusted to improve the output gain of the power chip.

6. The method according to claim 1, characterized in that In response to the next frame display picture being a light-load picture, reducing the output gain of the power chip includes: In response to the next frame display picture being a light-load picture, switching the response signal sent by the timing control chip to the power chip to a low level; The power chip detects that the response signal switches to a 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 chip.

7. A display device, characterized in that: Applying the gain control method described in any one of claims 1 to 6, the display device includes a timing control chip and a power supply chip connected to the timing control chip.

8. The display device according to claim 7, characterized in that: The display device further comprises: a gain signal generating circuit, wherein an input terminal of the gain signal generating circuit is used to input an initial voltage signal; The power chip comprises: a gain adjustment circuit; the input end of the gain adjustment circuit is connected to the output end of the gain signal generating circuit for inputting a gain signal; the output end of the gain adjustment circuit is used for outputting an adjusted gain signal.

9. The display device according to claim 8, characterized in that: 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 resistor-capacitor module; The first input end of the second operational amplifier is used as the input end of the gain adjustment circuit for inputting a gain signal; the output end of the second operational amplifier is respectively connected to the second input end of the second operational amplifier and the first end of the second switch module; The second end of the second switch module is respectively connected to the first input end of the first operational amplifier and the ground; the second input end of the first operational amplifier is used to input a gain signal; the output end of the first operational amplifier is respectively connected to the first end of the third switch module and the first end of the predetermined resistor-capacitor module; The second end of the predetermined resistor-capacitor module is used to input a gain signal; the third end of the predetermined resistor-capacitor module and the second end of the third switch module are used to output an adjusted gain signal.

10. An electronic device, characterized in that: The electronic device comprises the display device according to any one of claims 7 to 9.

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