WO2023045169A1

WO2023045169A1 - Display apparatus, control method therefor and display system

Info

Publication number: WO2023045169A1
Application number: PCT/CN2021/143359
Authority: WO
Inventors: 杨文武; 李建雷; 袁海江
Original assignee: 惠科股份有限公司
Priority date: 2021-09-24
Filing date: 2021-12-30
Publication date: 2023-03-30
Also published as: CN113571001B; CN113571001A

Abstract

The present application discloses a display apparatus, a control method therefor and a display system, which belong to the technical field of display. The display apparatus (10) comprises a switch device (110), a display module (120), a capacitor C, and a timing controller (130). The switch device (110) is connected to a power supply module (140), the display module (120) and the capacitor C. When the switch device (110) is turned on, the power supply module (140) supplies power to the display module (120) and the capacitor C. When the display apparatus (10) is operating, the timing controller (130) controls the switch device (110) to turn off in a blank duration. In this way, during the blank duration when the power supply module (140) does not output electric energy to the display module (120), the switch device (110) is turned off, such that the electric energy outputted from the power supply module (140) to the capacitor C will not suddenly increase and will not result in an inverse piezoelectric effect of the capacitor C, and thus, the capacitor C will not cause vibration due to generating mechanical deformation, and a printed circuit board in which the capacitor C is located will not generate noise.

Description

Display device, control method thereof, and display system

This application claims the priority of the Chinese patent application with the application number 202111120933.0 and the application name "display device and display system" filed at the Patent Office of the State Intellectual Property Office of the People's Republic of China on September 24, 2021, the entire content of which is passed References are incorporated in this application.

technical field

The present application relates to the field of display technology, in particular to a display device, a control method thereof, and a display system.

Background technique

The frame duration for the display panel to display a frame of image generally includes a display duration and a blank duration. The so-called display time refers to the time period during which the power supply continues to output power to the display panel, and the so-called blank time refers to the time period during which the power supply does not need to output power to the display panel.

At present, in order to store energy and filter, the display device generally needs to include a capacitor connected in parallel with the display panel in addition to the display panel. When the power supply supplies power to the display panel, the capacitor and the display panel share the total electric energy provided by the power supply, that is, part of the electric energy flows to the capacitor and part of the electric energy flows to the display panel to drive each sub-pixel to emit light. However, since the display panel does not need to input power during the blank time, the display panel will not share the power provided by the power supply during the blank time, and all the power flows to the capacitor, that is, the power flowing to the capacitor during the blank time is greater than the display time. The energy flowing into the capacitor. Therefore, when the output power of the power supply remains unchanged, the power output from the power supply to the capacitor will suddenly increase, which will cause the inverse piezoelectric effect of the capacitor. At this time, the capacitor will be mechanically deformed, causing vibration. Noise is generated when the vibration of the capacitor is transmitted to the printed circuit board where the capacitor is mounted. In the related art, a protective layer is usually added between the capacitor and the printed circuit board, so as to reduce the influence of the vibration of the capacitor on the printed circuit board.

However, adding a protective layer between the capacitor and the PCB does not completely eliminate the noise generated by the PCB.

technical problem

One of the objectives of the embodiments of the present application is to provide a display device, its control method, and a display system, which can eliminate the noise generated by the printed circuit board when the display module displays images.

technical solution

In a first aspect, a display device is provided, including: a switch device, a display module, a capacitor, and a timing controller;

The switching device is connected to the power module, the display module, and the capacitor, and the display module and the capacitor are connected in parallel. When the switching device is turned on, the power module sends and the capacitor power supply;

The timing controller is connected to the display module for controlling the display module to display images;

The timing controller is also used for: acquiring a blank time in the frame time required for the display module to display a frame of the image, and controlling the switching device to operate within the blank time according to the blank time. turn off, the blank duration includes a first blank duration and/or a second blank duration, the first blank duration is located before the display duration in the frame duration, and the second blank duration is located in the frame duration After the stated display duration.

Optionally, the timing controller is also used to obtain the display duration in the frame duration required by the display module to display a frame of the image, and to control the switching device to conduct the display within the display duration. Pass.

Optionally, the display device further includes: a pulse width modulator;

The pulse width modulator is connected to the timing controller, and the pulse width modulator is also connected to the switching device, and the timing controller is specifically used to modulate the pulse width to the pulse width when the blank period begins. for outputting a first control signal to the pulse width modulator; and for outputting a second control signal to the pulse width modulator when the display duration begins;

The pulse width modulator is used for: controlling the switching device to turn off when receiving the first control signal, and controlling the switching device for receiving the second control signal conduction.

Optionally, the pulse width modulator is also connected to the power module, and the pulse width modulator is used to detect a second voltage value output by the switching device;

The pulse width modulator is further configured to: adjust the output voltage of the power module according to the magnitude relationship between the second voltage value and a preset voltage value within the display duration.

Optionally, when the blank duration includes at least the first blank duration; the timing controller is further configured to: adjust according to the first voltage value required to display the image within the first blank duration The output voltage of the power module.

Optionally, the display device further includes: a pulse width modulator;

The pulse width modulator is connected to the timing controller, and the pulse width modulator is also connected to the power module, and the timing controller is specifically used to acquire the image data of the image, and in the second outputting a first voltage value according to the image data at the beginning of a blank period;

The pulse width modulator is configured to: adjust the output voltage of the power module according to the first voltage value when receiving the first voltage value.

Optionally, when the first voltage value is within a preset voltage range, the pulse width modulator is configured to: generate a first adjustment signal according to a duty cycle corresponding to the preset voltage range, and convert the first An adjustment signal is output to the power module, the first adjustment signal is used to adjust the output voltage of the power module, the number of the preset voltage range is one or more, and the number of the preset voltage ranges is the same as The plurality of duty ratios correspond one to one.

Optionally, the display device further includes a current limiting circuit connected in parallel with the switching device;

When the switching device is turned off, the power module supplies power to the capacitor through the current limiting circuit.

Optionally, the display device further includes a load circuit connected in parallel with the display module, and when the switching device is turned off, the power supply module also supplies power to the load circuit through the current limiting circuit.

In a second aspect, a display system is provided, including the display device as described in the first aspect.

In a third aspect, there is provided a method for controlling a display device, which is applied to the display device described in the first aspect, and the method includes: acquiring a blank duration in the frame duration required for the display module to display a frame of the image ;

According to the blank duration, the switch device is controlled to be turned off within the blank duration, the blank duration includes a first blank duration and/or a second blank duration, and the first blank duration is located in the frame duration Before the display duration, the second blank duration is located after the display duration in the frame duration.

Optionally, the method further includes: obtaining a display duration of the frame duration required for the display module to display a frame of the image, and controlling the switching device to be turned on within the display duration.

Optionally, the method further includes: a timing controller outputs a first control signal to the pulse width modulator when the blank time starts; and outputs a first control signal to the pulse width modulator when the display time begins. 2. Control signals;

The pulse width modulator controls the switching device to turn off when receiving the first control signal, and controls the switching device to turn on when receiving the second control signal.

Optionally, the method further includes: the pulse width modulator detects the second voltage value output by the switching device; within the display duration, adjusts the voltage of the power module according to the magnitude relationship between the second voltage value and the preset voltage value. The output voltage.

Optionally, the blank time includes at least the first blank time, and the method further includes: the timing controller adjusts the voltage of the power module according to the first voltage value required to display the image within the first blank time. The output voltage.

Optionally, the method further includes: a timing controller acquires image data of the image, and outputs a first voltage value according to the image data when the first blanking period starts; the pulse width modulator receives the In the case of the first voltage value, the output voltage of the power module is adjusted according to the first voltage value.

Optionally, the method further includes: when the first voltage value is within a preset voltage range, the pulse width modulator generates a first adjustment signal according to a duty cycle corresponding to the preset voltage range, and Outputting the first adjustment signal to the power module, the first adjustment signal is used to adjust the output voltage of the power module, the number of the preset voltage ranges is one or more, a plurality of the preset It is assumed that the voltage range is in one-to-one correspondence with the plurality of duty ratios.

Beneficial effect

In this application, the display device includes a switch device, a display module, a capacitor and a timing controller. The switch device is connected with the power module, the display module and the capacitor. When the switch device is turned on, the power supply module supplies power to the display module and the capacitor. The timing controller controls the display module to display the frame duration of a frame of image, including the display duration and the blank duration, and the blank duration includes the first blank duration before the display duration in the frame duration, and the second blank duration after the display duration in the frame duration . When the display device is working, the timing controller controls the switching device to be turned off within the blank period. In this way, during the blank period when the power module does not output power to the display module, the switching device is turned off, and the power of the power module will not be output to the capacitor, so that the power output from the power module to the capacitor will not suddenly increase, and will not cause capacitance. The inverse piezoelectric effect, so that the capacitor will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor is located will not generate noise. At the same time, the display device does not need to add a protective layer between the capacitor and the printed circuit board, and does not increase the volume and thickness of the display device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following descriptions are only for this application. For some embodiments, those skilled in the art can also obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a first display device provided by an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a display module provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a second display device provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a third display device provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a fourth display device provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a fifth display device provided by an embodiment of the present application.

Among them, the meanings represented by the symbols in the drawings are respectively:

10. Display device; 110. Switch device; 120. Display module; 122. Display panel; 124. Scanning unit; 126. Drive unit; 130. Sequence controller; 140. Power module; 150. Pulse width modulator; 160. Load circuit; 170, current limiting circuit.

Embodiments of the present invention

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

It should be understood that the "plurality" mentioned in this application means two or more. In the description of this application, unless otherwise specified, "/" means or means, for example, A/B can mean A or B; "and/or" in this article is just a description of the relationship between associated objects, It means that there can be three kinds of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in order to clearly describe the technical solution of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not necessarily limit the difference.

Before explaining the embodiment of the present application in detail, the application scenario of the embodiment of the present application will be described first.

At present, in order to store energy and filter, the display device generally needs to include a capacitor connected in parallel with the display panel in addition to the display panel. When the power supply supplies power to the display panel, the capacitor and the display panel share the total electric energy provided by the power supply, that is, part of the electric energy flows to the capacitor and part of the electric energy flows to the display panel to drive each sub-pixel to emit light. However, since the display panel does not need to input power during the blank time, the display panel will not share the power provided by the power supply during the blank time, and all the power flows to the capacitor, that is, the power flowing to the capacitor during the blank time is greater than the display time. The energy flowing into the capacitor. Therefore, when the output power of the power supply remains unchanged, the power output from the power supply to the capacitor will suddenly increase, which will cause the inverse piezoelectric effect of the capacitor. At this time, the capacitor will be mechanically deformed, causing vibration. Noise will be generated when the vibration of capacitors (especially chip capacitors) is transmitted to the printed circuit board where the capacitors are located. In the related art, a protective layer is usually added between the capacitor and the printed circuit board, so as to reduce the influence of the vibration of the capacitor on the printed circuit board.

To this end, embodiments of the present application provide a display device and a display system, which can eliminate noise generated by a printed circuit board when a display panel displays images.

The display device provided by the embodiment of the present application will be explained in detail below.

FIG. 1 is a schematic structural diagram of a display device 10 provided by an embodiment of the present application. As shown in FIG. 1 , the display device 10 includes a switching device 110 , a display module 120 , a capacitor C and a timing controller 130 .

The switch device 110 is connected with the power module 140 , the display module 120 and the capacitor C. The display module 120 is connected in parallel with the capacitor C. When the switch device 110 is turned on, the power module 140 supplies power to the display module 120 and the capacitor C. The timing controller 130 is connected to the display module 120 for controlling the display module 120 to display images. The timing controller 130 is also used to: obtain a blank time in the frame time required by the display module 120 to display a frame of image; according to the blank time, control the switching device 110 to turn off within the blank time. The blank duration includes at least one of the first blank duration and the second blank duration. Wherein, the first blank duration is within the frame duration and before the display duration; the second blank duration is within the frame duration and after the display duration.

Specifically, the switch device 110 is an electrical device used to control the on-off of the circuit. The switching device 110 has a first terminal a, a second terminal b and a control terminal c. The control terminal c of the switch device 110 is used to control the on and off of the first terminal a and the second terminal b of the switch device 110 . The first terminal a of the switching device 110 is connected to the output terminal d of the power module 140, and the power module 140 is used for outputting electric energy. In this way, when the switching device 110 is turned on, the electric energy output by the power module 140 is output from the second terminal b of the switching device 110 through the switching device 110 . When the switching device 110 is turned off, the power module 140 cannot output electric energy through the switching device 110 .

The display module 120 is used for displaying images. The power terminal e of the display module 120 is connected to the second terminal b of the switch device 110, so that when the switch device 110 is turned on, the display module 120 can obtain the power output by the power module 140 and display images. In some embodiments, the display module 120 includes a display panel 122 . The display panel 122 includes a plurality of sub-pixels distributed in an array. When the display panel 122 is working, each sub-pixel emits light to display images.

Capacitor C is used for filtering and energy storage. The capacitor C is connected to the second terminal b of the switch device 110 , so that when the switch device 110 is turned on, the capacitor C can obtain the power output from the power module 140 and filter the power output from the power module 140 to the display module 120 . In the embodiment of the present application, the capacitor C includes a first plate and a second plate. A first plate of the capacitor C is connected to the second terminal b of the switching device 110 , and a second plate of the capacitor C is connected to a preset voltage terminal. The voltage at the preset voltage terminal is lower than the voltage output by the power module 140 , so that the power module 140 charges the capacitor C when the switching device 110 is turned on. In some embodiments, as shown in FIG. 1 , the preset voltage terminal may be the ground line GND.

The timing controller 130 has a data input terminal h, a first output terminal f and a second output terminal g. The data input terminal h of the timing controller 130 is used to acquire the image data of the currently displayed image. The image data of the currently displayed image usually includes the grayscale value or grayscale voltage of each sub-pixel when the display module 120 displays the currently displayed image. Generally, the image data of the currently displayed image can be output by the host to the data input terminal h of the timing controller 130 . The mainframe refers to the main body part of the computer except for the input devices and output devices. For example, for a personal computer (PC), the host generally includes a CPU, a memory, a hard disk, and a power supply, but does not include input devices such as a keyboard and a mouse, and output devices such as a monitor. For a mobile phone, the host usually includes a CPU, a memory, and a hard disk, but does not include a display panel and a touch panel. The first output terminal f of the timing controller 130 is connected to the control terminal r of the display module 120 to output a timing control signal. The timing control signal may be generated by the timing controller 130 according to the image data of the currently displayed image, and the timing control signal is used to control the display module 120 to display the currently displayed image. The second output terminal g of the timing controller 130 is connected to the control terminal c of the switching device 110 to control the switching device 110 to be turned on and off.

The frame duration for which the timing controller 130 controls the display module 120 to display a frame of image includes a display duration and a blank duration before or/and after the display duration. The frame duration here refers to the time length used by the display module 120 to display a frame of image. The display duration refers to the time length during which the display module 120 obtains the electric energy output by the power module 140 within the frame duration. In the embodiment of the present application, the blank duration before the display duration within one frame duration is referred to as the first blank duration; and the blank duration after the display duration within one frame duration is referred to as the second blank duration. That is to say, the first blank time period refers to the time length during which the display module 120 does not obtain the electric energy output by the power supply module 140 within the frame time period and before the display time period. The second blank time period refers to a time length during which the display module 120 does not obtain the electric energy output by the power supply module 140 within the frame time period and after the display time period. For example, when the refresh rate of the display module 120 is 60Hz (hertz), the frame duration of the display module 120 is 1/60S (second). Assuming that the display panel 122 of the display module 120 has 1080 rows of sub-pixels, when the timing controller 130 controls the display module 120 to display a frame of image, it can generate N row scanning times, each row scanning time is equal, and N is greater than 1080. The sum of the scan times of N rows is 1/60 second. Wherein, from the i-th row scanning time to the i+1079th row scanning time, the timing controller 130 controls multiple sub-pixels of the display module 120 to write voltage signals row by row, where i is greater than or equal to 1, and i+1079 less than N. At this time, the display duration is from the scan time of the i-th row to the scan time of the i+1079th row. From the first line scanning time to the i−1th line scanning time, and from the i+1080th line scanning time to the Nth line scanning time, the timing controller 130 controls the display module 120 not to write a voltage signal. At this time, the scanning time of the i+1080th line to the scanning time of the Nth line is the second blank period. The first blank period is the first blanking time from the first line scanning time to the i-1th line scanning time, and the display time is from the i-th line scanning time to the i+1079th line scanning time.

During the display period, the timing controller 130 controls the switching device 110 to be turned on, so that the power module 140 can output electric energy to the display module 120 , so that multiple sub-pixels in the display module 120 can write voltage signals row by row. During the blank period, the power module 140 will not output power to the display module 120, and at this time the timing controller 130 controls the switching device 110 to turn off. In this way, during the process of switching the display module 120 from heavy load to light load, that is, during the process of the display module 120 entering the blank time from the display duration, if the power supply module 140 is still in the high current output state, since the switching device 110 is turned off, the power supply The electric energy output by the module 140 to the capacitor C will not increase suddenly, and will not cause the inverse piezoelectric effect of the capacitor C, so that the capacitor C will not vibrate due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise . At the same time, there is no need to add a protective layer between the capacitor C and the printed circuit board, and the volume and thickness of the display device will not be increased.

It should be noted that, in the above embodiments, the introduction of the power module 140 is only for describing the working process of the display device 10 of the present application. In fact, the display device 10 may include the power module 140 or may not include the power module 140 . In other words, in the above embodiments, the power module 140 exists as an environmental element, and its introduction in the above embodiments should not be construed as limiting the embodiments of the present application.

FIG. 2 is a schematic structural diagram of a display module 120 provided by an embodiment of the present application. In some embodiments, as shown in FIG. 2 , the display module 120 includes a display panel 122 , a scanning unit 124 and a driving unit 126 .

The display panel 122 includes a plurality of sub-pixels arranged in an array. The array distribution here means that multiple sub-pixels are arranged in multiple rows and multiple columns. The first output terminal f of the timing controller 130 may include a first terminal a and a second terminal b.

Scanning unit 124 has an input and a plurality of outputs. The input terminal of the scanning unit 124 may be connected to the first terminal a of the first output terminal f of the timing controller 130 , and each output terminal of the scanning unit 124 may be connected to a row of sub-pixels of the display panel 122 . When the scanning unit 124 is working, it acquires the timing control signal output by the timing controller 130 and generates a plurality of scanning signals according to the timing control signal. Multiple output terminals of the scanning unit 124 are used to output scanning signals one by one, so as to scan multiple sub-pixels of the display panel 122 row by row.

The drive unit 126 has an input and a plurality of outputs. The input terminal of the driving unit 126 may be connected to the second terminal b of the first output terminal f of the timing controller 130 , and multiple output terminals of the driving unit 126 may be connected to multiple columns of sub-pixels of the display panel 122 in one-to-one correspondence. When the driving unit 126 is working, it acquires the timing control signal output by the timing controller 130 and generates a plurality of driving signals according to the timing control signal. The driving signal is the voltage signal to be written into the sub-pixel in the above embodiment. Multiple output terminals of the driving unit 126 are used to output multiple driving signals. The scanning unit 124 and the driving unit 126 work together to control the luminance of each sub-pixel in the display panel 122 . Generally, within the frame time period when the display module 120 displays a frame of image, the scanning unit 124 and the driving unit 126 only output the scanning signal and the driving signal within the display time period.

FIG. 3 is a schematic structural diagram of another display device 10 provided by an embodiment of the present application. As shown in FIG. 3 , in some embodiments, the display device 10 may include the aforementioned power module 140 .

The power module 140 is used to supply power to the display module 120 . The power module 140 may include a buck-boost unit. The buck-boost unit is used to boost or buck the input voltage. The input terminal of the buck-boost unit can be connected to the mains to obtain the input voltage. The output terminal of the buck-boost unit may be connected to the first terminal a of the switching device 110 . In other words, the output terminal of the buck-boost unit is the output terminal d of the power module 140 . In some specific embodiments, the buck-boost unit may be a BUCK-BOOST circuit (buck-boost conversion circuit).

The power module 140 also has a control terminal c, and the output voltage of the output terminal d of the power module 140 can be adjusted through the control terminal j of the power module 140 . For example, the control terminal j of the power module 140 may be the gate of a transistor in a BUCK-BOOST circuit. The timing controller 130 has a third output terminal, and the third output terminal i of the timing controller 130 is connected to the control terminal j of the power module 140 so that the timing controller 130 can adjust the output voltage of the power module 140 .

The timing controller 130 is used to control the switching device 110 to turn off during the first blank time period, and adjust the output voltage of the power module 140 according to the first voltage value required by the current display image. The currently displayed image refers to an image that needs to be displayed in the frame duration of the first blank duration. The first voltage value currently required for displaying an image refers to the voltage that needs to be obtained from the power module 140 when the display module 120 displays a frame of image corresponding to the first blank duration. Generally, the first voltage value required for currently displaying an image is related to the grayscale voltage of image data, the higher the grayscale voltage of image data, the higher the first voltage value required for currently displaying an image. The timing controller 130 is also used to control the switching device 110 to be turned on within the display duration. In this way, when the display module 120 is switched from light load to heavy load, that is, when the display module 120 enters the second blank time from the first blank time, the power output from the power module 140 to the capacitor C will not suddenly decrease. The inverse piezoelectric effect of the capacitor C will not be caused, and the capacitor C will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise.

In some embodiments, as shown in FIG. 4 , the display device 10 further includes a pulse width modulator 150 . The pulse width modulator 150 is connected to the timing controller 130 , and the pulse width modulator 150 is connected to the power module 140 . The timing controller 130 is used to acquire the image data of the currently displayed image, and output the first voltage value according to the image data when the first blanking period starts. The pulse width modulator 150 is used for adjusting the output voltage of the power module 140 according to the first voltage value when receiving the first voltage value.

Specifically, the first input terminal k of the pulse width modulator 150 is connected to the third output terminal i of the timing controller 130 . The first output terminal m of the pulse width modulator 150 is connected to the control terminal j of the power module 140 . Wherein, the timing controller 130 is used to acquire image data of the currently displayed image, and obtain the first voltage value required by the currently displayed image according to the image data. The third output terminal i of the timing controller 130 is used to output the first voltage value to the first input terminal k of the pulse width modulator 150 during the first blank period. The pulse width modulator 150 is configured to: adjust the output voltage of the power module 140 according to the first voltage value when the first input terminal k of the pulse width modulator 150 inputs a first voltage value.

The first voltage value here is the above-mentioned first voltage value required by the currently displayed image. After the timing controller 130 acquires the image data of the currently displayed image, it can obtain the first voltage value required by the display module 120 to display the currently displayed image according to the image data of the currently displayed image. After the timing controller 130 obtains the first voltage value, it outputs the first voltage value to the pulse width modulator 150 . The pulse width modulator 150 can adjust the duty cycle of the transistor in the power module 140 according to the first voltage value, so as to achieve the purpose of adjusting the output voltage of the power module 140 . Wherein, the duty cycle of the transistor refers to the percentage of the turn-on time of the transistor to the total turn-on and turn-off time.

In some embodiments, when the pulse width modulator 150 adjusts the output voltage of the power module 140 according to the first voltage value, specifically: when the first voltage value is within the preset voltage range, according to the duty cycle corresponding to the preset voltage range The duty ratio generates a first adjustment signal, and outputs the first adjustment signal from the first output terminal m of the pulse width modulator 150 to the power module 140 to adjust the output voltage of the power module 140 .

Specifically, multiple preset voltage ranges and multiple duty cycles may be set in the pulse width modulator 150 , and the multiple preset voltage ranges correspond to the multiple duty cycles one by one. For example, four preset voltage ranges of [15V, 12V), [12V, 9V), [9V, 6V) and [6V, 3V) are set in the pulse width modulator 150 . Among them, the preset voltage range of [15V, 12V) corresponds to a duty cycle of 80%; the preset voltage range of [12V, 9V] corresponds to a duty cycle of 60%; the preset voltage range of [9V, 6V) corresponds to a duty cycle of 80%; The corresponding duty cycle is 40%; the preset voltage range of [6V, 3V) corresponds to a duty cycle of 20%.

When the first voltage value is within the preset voltage range of [15V, 12V), the pulse width modulator 150 generates a first adjustment signal according to a duty cycle of 80%. When the pulse width modulator 150 outputs the first adjustment signal to the control terminal j of the power module 140 , the duty cycle of the transistor in the power module 140 is 80%, so that the output voltage of the power module 140 is within [15V, 12V). When the first voltage value is within the preset voltage range of [12V, 9V), the pulse width modulator 150 generates a first adjustment signal according to a duty cycle of 60%. When the pulse width modulator 150 outputs the first adjustment signal to the control terminal j of the power module 140 , the duty cycle of the transistor in the power module 140 is 60%, so that the output voltage of the power module 140 is within [12V, 9V). When the first voltage value is within the preset voltage range of [9V, 6V), the pulse width modulator 150 generates a first adjustment signal according to a duty cycle of 40%. When the pulse width modulator 150 outputs the first adjustment signal to the control terminal j of the power module 140, the duty cycle of the transistor in the power module 140 is 40%, so that the output voltage of the power module 140 is within [9V, 6V)... ...and so on, no more details.

In some embodiments, as shown in FIG. 4 , the pulse width modulator 150 is used to control the switching device 110 to turn off according to the first control signal from the timing controller 130 , and is also used to turn off the switching device 110 according to the second control signal from the timing controller 130 . The signal controls the switching device 110 to turn on. Specifically, the second input terminal n of the pulse width modulator 150 is connected to the second output terminal g of the timing controller 130 , and the second output terminal p of the pulse width modulator 150 is connected to the control terminal c of the switching device 110 . The second output terminal g of the timing controller 130 is used to output the first control signal to the second input terminal n of the pulse width modulator 150 at the beginning of the second blank period, and output the second control signal to the pulse width at the beginning of the display period. The second input terminal n of the modulator 150 . The pulse width modulator 150 is used to: when a first control signal is input to the second input terminal n of the pulse width modulator 150, control the switching device 110 to turn off; input a second control signal to the second input terminal n of the pulse width modulator 150 signal, the control switching device 110 is turned on.

Specifically, it is known from the above description that the timing controller 130 needs to control the switching device 110 to turn off during the first blank period and the second blank period. During the display period, the timing controller 130 needs to control the switching device 110 to be turned on. In the embodiment of the present application, the timing controller 130 outputs the first control signal and the second control signal to the pulse width modulator 150, and the pulse width modulator 150 is used to control the switching device 110 to turn off according to the first control signal. The two controller signals control the switching device 110 to be turned on. In this way, when the display panel 122 displays the first frame image, when the second blank period of the first frame image starts, the timing controller 130 outputs the first control signal to control the switch device 110 to turn off through the pulse width modulator 150 . During the second blank period of the first frame of images, the switching device 110 remains in an off state. During the first blank period of the second frame of image, the switching device 110 is still in the off state. When the display duration of the second frame image starts, the timing controller 130 outputs a second control signal to control the switching device 110 to be turned on through the pulse width modulator 150 . During the display duration of the second frame of image, the switching device 110 remains in the on state. When the second blank period of the second frame image starts, the timing controller 130 outputs the first control signal to control the switch device 110 to turn off through the pulse width modulator 150 .

In some embodiments, as shown in FIG. 5 , the pulse width modulator 150 also has a third input terminal. The third input terminal w of the pulse width modulator 150 is connected to the second terminal b of the switch device 110 to detect the second voltage value output by the switch device 110 . The pulse width modulator 150 is used for adjusting the output voltage of the power module 140 according to the magnitude relationship between the second voltage value and the preset voltage value within the display duration.

Specifically, the pulse width modulator 150 is used for: after the second control signal is input and before the first control signal is input, the second adjustment signal is generated according to the magnitude relationship between the second voltage value and the preset voltage value, and the second adjustment signal The signal is output from the first output terminal m of the pulse width modulator 150 to adjust the output voltage of the power module 140 .

The third input terminal w of the pulse width modulator 150 is used to detect the voltage output from the switching device 110 to the display module 120 to obtain a second voltage value. After the second control signal is input to the pulse width modulator 150 and before the first control signal is input, it means that the display device 10 is within the display duration. The preset voltage value can be set instantly according to the first voltage value required by the display module 120 to display the currently displayed image. For example, when the display module 120 displays a solid-color image of thirty-two grayscales (the grayscale of each sub-pixel of the display panel 122 is thirty-two grayscales), if the first voltage value is 12V, the preset voltage value It can also be 12V. When the display module 120 displays non-solid color images, if the first voltage value is 13.5V, the preset voltage value may also be 13.5V. In some other embodiments, the preset voltage value may be different from the first voltage value.

During the display duration, the pulse width modulator 150 is used to generate a second adjustment signal according to the magnitude relationship between the second voltage value and the preset voltage value, and the second adjustment signal is output from the first output terminal m of the pulse width modulator 150, also Used to adjust the output voltage of the power module 140 . Generally, when the second voltage value is greater than the preset voltage value, the second adjustment signal is used to reduce the duty cycle of the transistor in the power module 140, thereby reducing the output voltage of the power module 140; when the second voltage value is lower than the preset voltage When the value is high, the second adjustment signal is used to increase the duty cycle of the transistor in the power module 140 , thereby increasing the output voltage of the power module 140 . In this way, the second voltage value output from the switch device 110 to the display module 120 can be equal to the preset voltage value required by the display module 120 as much as possible.

In some embodiments, as shown in FIG. 6 , the switching device 110 includes a transistor. The transistor here may be a MOS (metal oxide semiconductor, metal oxide semiconductor) field effect transistor, or a bidirectional thyristor or a unidirectional thyristor. The first pole of the transistor is used to be connected to the output terminal d of the power module 140 for inputting electrical signals, which can be the drain of the NMOS transistor, the source of the PMOS transistor or the anode of the one-way thyristor. The second pole of the transistor is connected to the power terminal e of the display module 120 and the capacitor C for outputting electrical signals, which can be the source of an NMOS transistor, the drain of a PMOS transistor, or the cathode of a one-way thyristor. The gate of a MOS transistor (including NMOS and PMOS) or the control electrode of a thyristor (including a bidirectional thyristor and a unidirectional thyristor) constitutes a control terminal c of the switching device 110 .

In some embodiments, as shown in FIG. 6 , the display device 10 further includes a current limiting circuit 170 . The current limiting circuit 170 is connected in parallel with the switching device 110 . In this way, when the switching device 110 is turned off, the power module 140 supplies power to the capacitor C through the current limiting circuit 170 . When the switch device 110 is turned on, the power module 140 supplies power to the capacitor C and the display module 120 through the current limiting circuit 170 . Wherein, as shown in FIG. 6 , the current limiting circuit 170 may include a resistor R.

Further, as shown in FIG. 6 , the display device further includes a load circuit 160 . The load circuit 160 is connected in parallel with the display module 120 . When the switching device 110 is turned off, the power module 140 supplies power to the capacitor C and the load circuit 160 through the current limiting circuit 170 . When the switch device 110 is turned on, the power module 140 supplies power to the capacitor C, the load circuit 160 and the display module 120 through the switch device 110 .

Specifically, the load circuit 160 refers to other loads in the display device 10 except the display module 120 . For example, the load circuit 160 may be a common voltage generation circuit, a gate-on voltage (VGH) generation circuit, or a gate-off voltage (VGL) generation circuit. The input end of the load circuit 160 is connected to the second end b of the switch device 110 , so that when the switch device 110 is turned on, the power module 140 supplies power to the load circuit 160 through the switch device 110 . Generally, when the display module 120 is in the second blank period and the first blank period, the load circuit 160 also needs to obtain electric energy. In the embodiment of the present application, the current limiting circuit 170 is connected in parallel with the switching device 110 . When the switching device 110 is turned off, the power module 140 supplies power to the load circuit 160 through the current limiting circuit 170 . In this way, not only can the continuous power supply to the load circuit 160 be realized, but also when the display module 120 switches from heavy load to light load, that is, when the display module 120 enters the second blank time from the display duration, the power supply module 140 outputs to The electric energy of the capacitor C is shared by the current limiting circuit 170, so that the voltage on the capacitor C rises slowly, the electric energy output from the power supply module 140 to the capacitor C will not increase suddenly, and the inverse piezoelectric effect of the capacitor C will not be caused, and the capacitor C will not It will cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise. Generally, the resistance of the current limiting circuit 170 can be determined by the capacitor C. That is, the resistance of the current limiting circuit 170 should satisfy that when the switching device 110 is turned off, the printed circuit board where the capacitor C is located will not generate noise.

The working process of the display device 10 of the present application will be described from a specific embodiment below with reference to FIG. 5 and FIG. 6 .

As shown in FIG. 5 , when the display device 10 is working, the data input terminal h of the timing controller 130 acquires the image data of the currently displayed image output by the host. The image data includes the grayscale voltage of each sub-pixel when the display module 120 displays the currently displayed image. The first output terminal f of the timing controller 130 is connected to the control terminal r of the display module 120 so that the timing controller 130 can control the display module 120 to display a frame of image according to the image data. The frame duration for which the timing controller 130 controls the display module 120 to display a frame of image includes a first blank duration, a display duration and a second blank duration.

When the first blank period starts, the third output terminal i of the timing controller 130 outputs the first voltage value to the first input terminal k of the pulse width modulator 150 . The first voltage value is a voltage value required by the display module 120 to display the currently displayed image. When the first voltage value is within the preset voltage range, the pulse width modulator 150 generates a first adjustment signal according to a duty cycle corresponding to the preset voltage range. The first adjustment signal is output from the first output terminal m of the pulse width modulator 150 to the control terminal j of the power module 140 for adjusting the output voltage of the power module 140 . During the first blank period, the switching device 110 is in an off state.

When the display duration starts, the second output terminal g of the timing controller 130 outputs a second control signal to the second input terminal n of the pulse width modulator 150 . The pulse width modulator 150 controls the switching device 110 to be turned on according to the second control signal, and the display module 120 obtains electric energy. During the display time period, the switching device 110 is in a conduction state. During the display duration, the third input terminal w of the pulse width modulator 150 detects the second voltage value output by the second terminal b of the switching device 110, and generates a second adjustment according to the magnitude relationship between the second voltage value and the preset voltage value. Signal. The second adjustment signal is output from the first output terminal m of the pulse width modulator 150 to the control terminal j of the power module 140, and is used to adjust the output voltage of the power module 140, so that the output voltage of the power module 140 is equal to the preset voltage as much as possible .

When the second blank period begins, the second output terminal g of the timing controller 130 outputs the first control signal to the second input terminal n of the pulse width modulator 150 . The pulse width modulator 150 controls the switching device 110 to turn off according to the first control signal, and the display module 120 no longer obtains electric energy. During the first blank period, the switching device 110 is in an off state.

When the display device 10 further includes a load circuit 160 other than the display module 120, as shown in FIG. 6, the load circuit 160 is connected to the second terminal b of the switching device 110, and A resistor R is also connected between them. During the display period, the resistor R is short-circuited by the switching device 110 , and the power supply module 140 supplies power to the display module 120 and the load circuit 160 through the switching device 110 . During the second blank period and the first blank period, the display module 120 does not obtain power, the switching device 110 is turned off, and the power supply module 140 supplies power to the load circuit 160 through the resistor R.

In this embodiment of the present application, the frame duration for which the timing controller 130 controls the display module 120 to display a frame of image includes a display duration and a blank duration. The blank duration includes the first blank duration before the display duration in the frame duration, and the first blank duration in the frame duration The second blank duration after the display duration. When the display device 10 is working, the power module 140 needs to output power to the display module 120 during the display time, and the timing controller 130 controls the switching device 110 to conduct; At this time, the timing controller 130 controls the switching device 110 to turn off. In this way, during the blank period when the power module 140 does not output power to the display module 120, the switching device 110 is turned off, and the power of the power module 140 will not be output to the capacitor C, so that the power output of the power module 140 to the capacitor C will not suddenly Larger, it will not cause the inverse piezoelectric effect of the capacitor C, and then the capacitor C will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise. At the same time, there is no need to add a protective layer between the capacitor C and the printed circuit board, and the volume and thickness of the display device will not be increased.

When the display device 10 is working, the switching device 110 is in the off state within the first blank time period. At this time, the timing controller 130 adjusts the output voltage of the power supply module 140 according to the first voltage value required by the current display image. When the module 120 is switched from light load to heavy load, that is, when the display module 120 enters the second blank time from the first blank time, the electric energy output by the power supply module 140 to the capacitor C will not suddenly decrease, and will not cause capacitance The inverse piezoelectric effect of C, so that the capacitor C will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise. During the display period, the pulse width modulator 150 can detect the second voltage value output by the switching device 110, and adjust the output voltage of the power module 140 according to the magnitude relationship between the second voltage value and the preset voltage value. In this way, the output voltage of the power module 140 can be made close to the voltage required by the display module 120 to display the current image, thereby improving the display stability of the display module 120 . When the display device 10 further includes other load circuits 160 other than the display module 120 , a current limiting circuit 170 is connected between the first terminal a and the second terminal b of the switching device 110 . When the switching device 110 is turned off, the power module 140 supplies power to the load circuit 160 through the current limiting circuit 170 . In this way, not only can the continuous power supply to the load circuit 160 be realized, but also when the display module 120 switches from heavy load to light load, that is, when the display module 120 enters the second blank time from the display duration, the power supply module 140 outputs to The electric energy of the capacitor C is shared by the current limiting circuit 170, the electric energy output from the power module 140 to the capacitor C will not increase suddenly, and will not cause the inverse piezoelectric effect of the capacitor C, and the capacitor C will not cause vibration due to mechanical deformation, The printed circuit board where the capacitor C is located also does not generate noise. The display device 10 eliminates the noise of the printed circuit board caused by the capacitor C from the source, which has low difficulty in implementation, low cost and good effect.

An embodiment of the present application further provides a display system, including the display device 10 in any one of the foregoing embodiments.

Specifically, the display system may include a display device 10 and a host. The host is used to output the image data of the currently displayed image to the timing controller 130 so that the timing controller 130 outputs signals according to the image data.

The display device 10 includes a switching device 110 , a display module 120 , a capacitor and a timing controller 130 . The switch device 110 is connected with the power module 140 , the display module 120 and the capacitor. The display module 120 and the capacitor are connected in parallel.

The timing controller 130 is connected to the display module 120 for controlling the display module 120 to display images. The timing controller 130 is also used to: obtain the blank duration in the frame duration required by the display module 120 to display a frame of image, and to control the switching device 110 to turn off within the blank duration according to the blank duration, the blank duration includes the first blank duration duration and/or a second blank duration, the first blank duration is located before the display duration in the frame duration, and the second blank duration is located after the display duration in the frame duration.

In some embodiments, the timing controller 130 is also used to acquire a display duration in the frame duration required by the display module 120 to display a frame of image, and to control the switching device 110 to be turned on within the display duration.

In some embodiments, the display device 10 further includes: a pulse width modulator 150 . The pulse width modulator 150 is connected to the timing controller 130 , and the pulse width modulator 150 is also connected to the switching device 110 , and the timing controller 130 is specifically configured to output a first control signal to the pulse width modulator 150 when the blank period starts. And for outputting the second control signal to the pulse width modulator 150 when the display duration starts.

The pulse width modulator 150 is used to control the switching device 110 to turn off when receiving the first control signal, and to control the switching device 110 to turn on when receiving the second control signal.

In some embodiments, the pulse width modulator 150 is also connected to the power module 140 , and the pulse width modulator 150 is used to detect the second voltage value output by the switching device 110 .

The pulse width modulator 150 is used for adjusting the output voltage of the power module 140 according to the magnitude relationship between the second voltage value and the preset voltage value within the display duration.

In some embodiments, the blanking duration includes at least the first blanking duration. The timing controller 130 is also used for: adjusting the output voltage of the power module 140 according to the first voltage value required for displaying images in the first blank time period.

In some embodiments, the display device 10 further includes: a pulse width modulator 150 . The pulse width modulator 150 is connected to the timing controller 130, and the pulse width modulator 150 is also connected to the power supply module 140. The timing controller 130 is specifically used to acquire the image data of the image, and output according to the image data when the first blank period begins. first voltage value.

The pulse width modulator 150 is used for adjusting the output voltage of the power module 140 according to the first voltage value when receiving the first voltage value.

In some embodiments, when the first voltage value is within the preset voltage range, the pulse width modulator 150 is configured to: generate a first adjustment signal according to a duty cycle corresponding to the preset voltage range, and output the first adjustment signal To the power module 140 , the first adjustment signal is used to adjust the output voltage of the power module 140 , the number of preset voltage ranges is one or more, and the preset voltage ranges correspond to the duty ratios one by one.

In some embodiments, the display device 10 further includes a current limiting circuit 170 connected in parallel with the switching device 110 . When the switching device 110 is turned off, the power module 140 supplies power to the capacitor C through the current limiting circuit 170 .

In some embodiments, the display device 10 further includes a load circuit 160 connected in parallel with the display module 120 , and the power module 140 supplies power to the load circuit 160 through the current limiting circuit 170 when the switching device 110 is turned off.

When the display device 10 is working, the switching device 110 is in the off state within the first blank time period. At this time, the timing controller 130 adjusts the output voltage of the power supply module 140 according to the first voltage value required by the current display image. When the module 120 is switched from light load to heavy load, that is, when the display module 120 enters the second blank time from the first blank time, the electric energy output by the power supply module 140 to the capacitor C will not suddenly decrease, and will not cause capacitance The inverse piezoelectric effect of C, so that the capacitor C will not cause vibration due to mechanical deformation, and the printed circuit board where the capacitor C is located will not generate noise. During the display period, the pulse width modulator 150 can detect the second voltage value output by the switching device 110, and adjust the output voltage of the power module 140 according to the magnitude relationship between the second voltage value and the preset voltage value. In this way, the output voltage of the power module 140 can be made close to the voltage required by the display module 120 to display the current image, thereby improving the display stability of the display module 120 . When the display device 10 further includes other load circuits 160 other than the display module 120 , a current limiting circuit 170 is connected between the first terminal a and the second terminal b of the switching device 110 . When the switching device 110 is turned off, the power module 140 supplies power to the load circuit 160 through the current limiting circuit 170 . In this way, not only can the continuous power supply to the load circuit 160 be realized, but also when the display module 120 switches from heavy load to light load, that is, when the display module 120 enters the second blank time from the display duration, the power supply module 140 outputs to The electric energy of the capacitor C is shared by the current limiting circuit 170, the electric energy output from the power module 140 to the capacitor C will not increase suddenly, and will not cause the inverse piezoelectric effect of the capacitor C, and the capacitor C will not cause vibration due to mechanical deformation. The printed circuit board where the capacitor C is located also does not generate noise. The display device 10 eliminates the noise of the printed circuit board caused by the capacitor C from the source, which has low difficulty in implementation, low cost and good effect.

The embodiment of the present application also provides a method for controlling a display device, which is applied to the display device 10 in any one of the above embodiments. The display device control method includes:

Obtaining the blank duration in the frame duration required by the display module 120 to display a frame of image;

According to the blank duration, the control switching device 110 is turned off in the blank duration, the blank duration includes a first blank duration and/or a second blank duration, the first blank duration is located before the display duration in the frame duration, and the second blank duration is located in the frame duration After the duration shown in .

In some embodiments, the display device control method further includes: acquiring a display duration in the frame duration required for the display module 120 to display a frame of image, and controlling the switching device 110 to be turned on within the display duration.

In some embodiments, the display device control method further includes: the timing controller 130 outputs a first control signal to the pulse width modulator 150 when the blank time starts; and outputs a second control signal to the pulse width modulator 150 when the display time starts. Signal.

The pulse width modulator 150 controls the switching device 110 to turn off when receiving the first control signal, and controls the switching device 110 to turn on when receiving the second control signal.

In some embodiments, the display device control method further includes: the pulse width modulator 150 detects the second voltage value output by the switching device 110; 140 output voltage.

In some embodiments, the blank period includes at least a first blank period, and the display device control method further includes: the timing controller 130 adjusts the output voltage of the power module 140 according to a first voltage value required for displaying images within the first blank period.

In some embodiments, the display device control method further includes: the timing controller 130 acquires image data of the image, and outputs a first voltage value according to the image data when the first blanking period starts. When the pulse width modulator 150 receives the first voltage value, it adjusts the output voltage of the power module 140 according to the first voltage value.

In some embodiments, the display device control method further includes: when the first voltage value is within a preset voltage range, the pulse width modulator 150 generates a first adjustment signal according to a duty cycle corresponding to the preset voltage range, and the second An adjustment signal is output to the power supply module 140, the first adjustment signal is used to adjust the output voltage of the power supply module 140, the number of preset voltage ranges is one or more, and multiple preset voltage ranges correspond to multiple duty cycles one by one .

The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still implement the foregoing embodiments Modifications to the technical solutions described in the examples, or equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application, and should be included in the Within the protection scope of this application.

Claims

A display device, including: a switching device (110), a display module (120), a capacitor C and a timing controller (130);

The switch device (110) is connected to the power module (140), the display module (120) and the capacitor C, the display module (120) and the capacitor C are connected in parallel, and the switch device (110) conducts When on, the power supply module (140) supplies power to the display module (120) and the capacitor C through the switching device (110);

The timing controller (130) is connected to the display module (120), and is used to control the display module (120) to display images;

The timing controller (130) is further configured to: acquire a blank duration in the frame duration required for the display module (120) to display a frame of the image, and control the switching device according to the blank duration (110) Turn off during the blank period, the blank period includes a first blank period and/or a second blank period, the first blank period is located before the display period in the frame period, and the second blank period A blank duration is located after the display duration in the frame duration.
The display device according to claim 1, wherein the timing controller (130) is further configured to acquire the display duration in the frame duration required for the display module (120) to display a frame of the image, and It is used for controlling the conduction of the switching device (110) within the display duration.
The display device according to claim 2, wherein the display device (10) further comprises: a pulse width modulator (150);

The pulse width modulator (150) is connected to the timing controller (130), and the pulse width modulator (150) is also connected to the switching device (110), and the timing controller (130) specifically for outputting a first control signal to the pulse width modulator (150) when the blanking period begins; and for outputting a second control signal to the pulse width modulator (150) when the display period begins ;

The pulse width modulator (150) is used for: controlling the switching device (110) to turn off when receiving the first control signal, and for controlling the switching device (110) to turn off when receiving the second control signal Next, the switching device (110) is controlled to be turned on.
The display device according to claim 3, wherein the pulse width modulator (150) is further connected to the power module (140), and the pulse width modulator (150) is used for detecting the switching device (110) ) output second voltage value;

The pulse width modulator (150) is further configured to: within the display duration, adjust the output voltage of the power module (140) according to the magnitude relationship between the second voltage value and a preset voltage value.
The display device according to claim 1, wherein when the blank time includes at least the first blank time, the timing controller (130) is further configured to: within the first blank time according to the display The first voltage value required by the image adjusts the output voltage of the power module (140).
The display device according to claim 5, wherein the display device (10) further comprises: a pulse width modulator (150);

The pulse width modulator (150) is connected to the timing controller (130), and the pulse width modulator (150) is also connected to the power module (140), and the timing controller (130) specifically for acquiring image data of the image, and outputting a first voltage value according to the image data when the first blanking period begins;

The pulse width modulator (150) is configured to: adjust the output voltage of the power module (140) according to the first voltage value when the first voltage value is received.
The display device according to claim 6, wherein when the first voltage value is within a preset voltage range, the pulse width modulator (150) is configured to: according to a duty corresponding to the preset voltage range generate a first adjustment signal, and output the first adjustment signal to the power module (140), the first adjustment signal is used to adjust the output voltage of the power module (140), and the preset voltage The number of ranges is one or more, and the multiple preset voltage ranges correspond to the multiple duty ratios one by one.
The display device according to claim 1, wherein the display device (10) further comprises a current limiting circuit (170) connected in parallel with the switching device (110);

When the switching device (110) is turned off, the power supply module (140) supplies power to the capacitor C through the current limiting circuit (170).
The display device according to claim 8, wherein the display device (10) further comprises a load circuit (160) connected in parallel with the display module (120), when the switching device (110) is turned off , the power module (140) also supplies power to the load circuit (160) through the current limiting circuit (170).
The display device according to claim 1, wherein a first plate of the capacitor C is connected to the switching device (110), and a second plate of the capacitor C is connected to a ground.
A display device control method, applied to the display device (10) according to any one of claims 1 to 10, wherein the display device control method comprises:

The timing controller (130) acquires a blank time in the frame time required for the display module (120) to display a frame of the image;

The timing controller (130) controls the switching device (110) to turn off within the blank time according to the blank time, the blank time includes a first blank time and/or a second blank time, the The first blank duration is located before the display duration in the frame duration, and the second blank duration is located after the display duration in the frame duration.
The display device control method according to claim 11, wherein the display device control method further comprises:

The timing controller (130) acquires the display duration in the frame duration required for the display module (120) to display a frame of the image;

The timing controller (130) controls the switching device (110) to be turned on within the display duration.
The display device control method according to claim 12, wherein the display device (10) further comprises: a pulse width modulator (150), the pulse width modulator (150) and the timing controller (130) connected, and the pulse width modulator (150) is also connected to the switching device (110);

The display device control method further includes:

The timing controller (130) outputs a first control signal to the pulse width modulator (150) when the blank period starts;

The pulse width modulator (150) controls the switching device (110) to turn off when receiving the first control signal;

The timing controller (130) outputs a second control signal to the pulse width modulator (150) when the display duration starts;

The pulse width modulator (150) controls the switching device (110) to turn on when receiving the second control signal.
The method for controlling a display device according to claim 13, wherein the pulse width modulator (150) is further connected to the power module (140);

The display device control method further includes:

The pulse width modulator (150) detects a second voltage value output by the switching device (110);

The pulse width modulator (150) adjusts the output voltage of the power module (140) according to the magnitude relationship between the second voltage value and a preset voltage value within the display duration.
The method for controlling a display device according to claim 11, wherein when the blanking period includes at least the first blanking period, the method for controlling the displaying device further comprises:

The timing controller (130) adjusts the output voltage of the power module (140) according to a first voltage value required for displaying the image within the first blank time period.
The display device control method according to claim 15, wherein the display device (10) further comprises: a pulse width modulator (150), the pulse width modulator (150) and the timing controller (130) connected, and the pulse width modulator (150) is also connected to the power module (140);

The display device control method further includes:

The timing controller (130) acquires image data of the image;

The timing controller (130) outputs a first voltage value according to the image data when the first blank period starts;

The pulse width modulator (150) adjusts the output voltage of the power module (140) according to the first voltage value when receiving the first voltage value.
The display device control method according to claim 16, wherein the display device control method further comprises:

When the first voltage value is within a preset voltage range, the pulse width modulator (150) generates a first adjustment signal according to a duty cycle corresponding to the preset voltage range and outputs it to the power module (140 ), the first adjustment signal is used to adjust the output voltage of the power module (140), the number of the preset voltage ranges is one or more, and the plurality of the preset voltage ranges and the plurality of the occupied One-to-one correspondence between empty ratios.
A display system, comprising the display device (10) according to any one of claims 1 to 10.