CN117612466A

CN117612466A - Display method and display device

Info

Publication number: CN117612466A
Application number: CN202310361209.XA
Authority: CN
Inventors: 田德利; 夏庆鑫; 祖荫鹏; 马志伟
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2024-02-27

Abstract

The embodiment of the application discloses a display method and display equipment, relates to the technical field of display, and can solve the problem of screen flickering caused by video data frame rate change when the display equipment plays video data, so that the use experience of a user is improved. The specific scheme comprises the following steps: receiving video data; determining a frame rate of the video data; when the frame rate of the video data is the first frame rate, adjusting the compensation voltage of the display to be the first voltage so that the display brightness of the display is standard brightness; in the case where the frame rate of the video data is changed from the first frame rate to the second frame rate, the compensation voltage of the display is adjusted to the second voltage so that the display luminance of the display is the standard luminance.

Description

Display method and display device

Technical Field

The present disclosure relates to the field of display, and in particular, to a display method and a display device.

Background

Currently, more and more display screens are beginning to support VRR (Variable Refresh Rate ) signaling. The VRR is an HDMI (High Definition Multimedia Interface, high-definition multimedia interface) technology, which can enable a television or a display to automatically adjust its refresh rate in real time, so as to match the frame rate output by various video source devices (such as a game console, a personal computer, etc.), and bring smooth viewing experience to viewers.

However, due to the difference of technologies adopted by different manufacturers or different types of display devices, when the frame rate of the input VRR signal is changed greatly, the brightness of the display screen partially supporting the VRR function is not consistent, and there is a significant change in brightness. For the user, the flicker of the picture is perceived, and the viewing experience of the user is reduced.

Disclosure of Invention

The embodiment of the application provides a display method and display equipment, which can be used for dynamically adjusting the overall brightness of a screen according to a frame rate by the display equipment under the condition of not increasing hardware cost, compensating the screen brightness difference caused by the great change of the frame rate of VRR signals and improving the watching experience of users.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

in a first aspect, a display device is provided, which may include: a display configured to adjust a refresh rate of the display according to a frame rate of video data that the display is required to display; a communicator configured to receive video data; the processor is respectively coupled with the display and the communicator; the processor is configured to: determining a frame rate of the video data; when the frame rate of the video data is the first frame rate, adjusting the compensation voltage of the display to be the first voltage so that the display brightness of the display is standard brightness; the first frame rate belongs to a first frame rate range; the compensation voltage is used for compensating voltage attenuation generated in a blank gap area between frame images of the video data; in the case that the frame rate of the video data is changed from the first frame rate to the second frame rate, adjusting the compensation voltage of the display to the second voltage so that the display brightness of the display is standard brightness; the second frame rate belongs to a second frame rate range.

With reference to the first aspect, in a possible implementation manner, the processor is configured to determine a frame rate of the video data, including: acquiring characteristic parameters of a frame image in video data and pixel clock parameters of a display; the characteristic parameters are used for representing the size of a frame image, and the pixel clock parameters are used for indicating the number of pixels which can be scanned by the display per second; and calculating the frame rate of the frame image according to the characteristic parameters and the pixel clock parameters.

With reference to the first aspect, in another possible implementation manner, the feature parameters include: a row synchronization signal pulse width, a horizontal back shoulder, a horizontal effective display length, a horizontal front shoulder, a frame synchronization signal pulse width, a vertical back shoulder, a vertical effective display length and a vertical front shoulder; a processor configured to calculate a frame rate of a frame image based on the feature parameters, comprising: calculating the line length of the frame image according to the line synchronous signal pulse width, the horizontal back shoulder, the horizontal effective display length and the horizontal front shoulder; calculating the frame length of the frame image according to the pulse width of the frame synchronous signal, the vertical back shoulder, the vertical effective display length and the vertical front shoulder; calculating the frame area of the frame image according to the line length and the frame length; and calculating the frame rate of the frame image according to the frame area and the pixel clock parameters.

With reference to the first aspect, in another possible implementation manner, the processor is configured to adjust the compensation voltage of the display to the first voltage in a case that a frame rate of the video data is the first frame rate, including: determining a first voltage corresponding to a first frame rate from a preset association relationship under the condition that the frame rate of the video data is the first frame rate; the preset association relation comprises association relation of a plurality of frame rate ranges and a plurality of compensation voltages, wherein the frame rate ranges comprise a first frame rate range; adjusting the compensation voltage of the display to a first voltage; a processor configured to adjust a compensation voltage of the display to a second voltage in a case where a frame rate of the video data is changed from a first frame rate to a second frame rate, comprising: in the case that the frame rate of the video data is changed from the first frame rate to the second frame rate, determining a second voltage corresponding to the second frame rate from a preset association relationship; a plurality of frame rate ranges included in a preset association relation comprise a second frame rate range; and adjusting the compensation voltage of the display to a second voltage.

With reference to the first aspect, in another possible implementation manner, if a minimum frame rate in the first frame rate range is greater than a maximum frame rate in the second frame rate range, the first voltage is less than the second voltage; the first voltage is greater than the second voltage if the maximum frame rate in the first frame rate range is less than the minimum frame rate in the second frame rate range.

In a second aspect, a display method is provided, applied to a display device, where a display of the display device has a VRR function. The method may include: receiving video data; determining a frame rate of the video data; when the frame rate of the video data is the first frame rate, adjusting the compensation voltage of the display to be the first voltage so that the display brightness of the display is standard brightness; the first frame rate belongs to a first frame rate range; the compensation voltage is used for compensating voltage attenuation generated in a blank gap area between frame images of the video data; the display adjusts the refresh rate of the display according to the frame rate of the video data required to be displayed by the display; in the case that the frame rate of the video data is changed from the first frame rate to the second frame rate, adjusting the compensation voltage of the display to the second voltage so that the display brightness of the display is standard brightness; the second frame rate belongs to a second frame rate range.

With reference to the second aspect, in another possible implementation manner, determining a frame rate of the video data includes: acquiring characteristic parameters of a frame image in video data and pixel clock parameters of a display; the characteristic parameters are used for representing the size of a frame image, and the pixel clock parameters are used for indicating the number of pixels which can be scanned by the display per second; and calculating the frame rate of the frame image according to the characteristic parameters and the pixel clock parameters.

With reference to the second aspect, in another possible implementation manner, the feature parameters include: a row synchronization signal pulse width, a horizontal back shoulder, a horizontal effective display length, a horizontal front shoulder, a frame synchronization signal pulse width, a vertical back shoulder, a vertical effective display length and a vertical front shoulder; according to the characteristic parameters, calculating the frame rate of the frame image comprises the following steps: calculating the line length of the frame image according to the line synchronous signal pulse width, the horizontal back shoulder, the horizontal effective display length and the horizontal front shoulder; calculating the frame length of the frame image according to the pulse width of the frame synchronous signal, the vertical back shoulder, the vertical effective display length and the vertical front shoulder; calculating the frame area of the frame image according to the line length and the frame length; and calculating the frame rate of the frame image according to the frame area and the pixel clock parameters.

With reference to the second aspect, in another possible implementation manner, in a case where a frame rate of the video data is a first frame rate, adjusting the compensation voltage of the display to the first voltage includes: determining a first voltage corresponding to a first frame rate from a preset association relationship under the condition that the frame rate of the video data is the first frame rate; the preset association relation comprises association relation of a plurality of frame rate ranges and a plurality of compensation voltages, wherein the frame rate ranges comprise a first frame rate range; adjusting the compensation voltage of the display to a first voltage; in the case where the frame rate of the video data is changed from the first frame rate to the second frame rate, adjusting the compensation voltage of the display to the second voltage includes: in the case that the frame rate of the video data is changed from the first frame rate to the second frame rate, determining a second voltage corresponding to the second frame rate from a preset association relationship; a plurality of frame rate ranges included in a preset association relation comprise a second frame rate range; and adjusting the compensation voltage of the display to a second voltage.

With reference to the second aspect, in another possible implementation manner, if the minimum frame rate in the first frame rate range is greater than the maximum frame rate in the second frame rate range, the first voltage is less than the second voltage; the first voltage is greater than the second voltage if the maximum frame rate in the first frame rate range is less than the minimum frame rate in the second frame rate range.

In a third aspect, a display device is provided, which has the functionality to implement the method of the second aspect described above. The functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a fourth aspect, a display device is provided, the display device including a receiving module for receiving video data; a frame rate determining module for determining a frame rate of the video data; the first compensation voltage adjusting module is used for adjusting the compensation voltage of the display to be the first voltage when the frame rate of the video data is the first frame rate so that the display brightness of the display is standard brightness; the first frame rate belongs to a first frame rate range; the compensation voltage is used for compensating voltage attenuation generated in a blank gap area between frame images of the video data; the display adjusts the refresh rate of the display according to the frame rate of the video data required to be displayed by the display; a second compensation voltage adjustment module for adjusting the compensation voltage of the display to a second voltage so that the display brightness of the display is standard brightness in the case that the frame rate of the video data is changed from the first frame rate to the second frame rate; the second frame rate belongs to a second frame rate range.

In a fifth aspect, there is provided a display device including: a processor and a memory; the memory is configured to store computer-executable instructions that, when executed by the first device, cause the first device to perform the display method as provided in any one of the second aspects above.

In a sixth aspect, there is provided a computer readable storage medium having instructions stored therein which, when run on a computer, cause the computer to perform the display method provided in any one of the second aspects above.

In a seventh aspect, there is provided a computer program product comprising instructions which, when run on a display device, cause the display device to perform the display method provided in any of the second aspects above.

In an eighth aspect, there is provided an apparatus (e.g. the apparatus may be a system-on-a-chip) comprising a processor for supporting a display device to implement the functions referred to in the second aspect above. In one possible design, the apparatus further includes a memory for storing program instructions and data necessary for the display device. When the device is a chip system, the device can be formed by a chip, and can also comprise the chip and other discrete devices.

According to the technical scheme provided by the embodiment of the application, under the condition that the display device can dynamically adjust the refresh rate of the display according to the frame rate of the input video data, the display device can adjust the compensation voltage of the display in real time according to the frame rate of the video data to maintain the display brightness of the display to be standard brightness, under the condition that the video display device determines that the frame rate of the video data is the first frame rate, the compensation voltage of the display is adjusted to be the first voltage, and under the condition that the display device determines that the frame rate of the video data is changed from the first frame rate to the second frame rate, the compensation voltage of the display is adjusted to be the second voltage. It can be seen that, in the technical scheme provided by the embodiment of the application, the display device can dynamically adjust the compensation voltage of the display according to the change of the frame rate, so that the voltage attenuation of the blank gap between the frame images under different frame rates tends to be stable when the display device realizes the VRR function, the flicker of the display screen caused by the change of the video frame rate when the display device realizes the VRR function is reduced, the overall brightness of the display screen is stabilized, and the use experience of a user is improved.

Drawings

FIG. 1A is a schematic diagram of a prior art screen tearing principle;

FIG. 1B is a schematic diagram of a prior art screen tearing effect;

FIG. 2 is a schematic diagram of a prior art image delay principle;

fig. 3 is a schematic diagram of a frame image structure according to an embodiment of the present application;

fig. 4 is a schematic diagram of an operation scenario between a display device and a control device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a control device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present application;

fig. 7 is a schematic software architecture diagram of a display device according to an embodiment of the present application;

fig. 8 is a schematic flow chart of a display method according to an embodiment of the present application;

FIG. 9A is a schematic diagram of display voltage decay at different frame rates according to an embodiment of the present application;

FIG. 9B is a schematic diagram of voltage variation for adjusting the compensation voltage at the first frame rate according to the embodiment of the present application;

FIG. 9C is a schematic diagram of voltage variation for adjusting the compensation voltage at the second frame rate according to the embodiment of the present application;

fig. 10 is a second flow chart of a display method according to an embodiment of the present application;

fig. 11 is a flowchart of a display method according to an embodiment of the present application;

fig. 12 is a flow chart diagram of a display method according to an embodiment of the present application;

Fig. 13 is an example schematic diagram of another display method according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of another display device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of still another display device according to an embodiment of the present application.

Detailed Description

For purposes of clarity and implementation of the present application, the following description will make clear and complete descriptions of exemplary implementations of the present application with reference to the accompanying drawings in which exemplary implementations of the present application are illustrated, it being apparent that the exemplary implementations described are only some, but not all, of the examples of the present application.

It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms "first," second, "" third and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for limiting a particular order or sequence, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to all elements explicitly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

Based on the exemplary embodiments described herein, all other embodiments that may be obtained by one of ordinary skill in the art without making any inventive effort are within the scope of the claims appended hereto. Furthermore, while the disclosure is presented in the context of an exemplary embodiment or embodiments, it should be appreciated that the various aspects of the disclosure may, separately, comprise a complete embodiment. It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

First, terms related to the present application are explained as follows:

frame rate: which may also be referred to as a frame rate or frame frequency, is the rate (frequency) at which images appear continuously on the display screen in frames.

Refresh rate: for indicating the number of repeated scans of the image on the display screen per second, i.e. the number of screen refreshes per second, by the electron beam in hertz (Hz). The higher the refresh rate, the more stable the image, the more natural and clear the image display, and the less impact on the eye. The lower the refresh frequency, the more flickering and dithering of the image, and the faster the eye strain.

HDMI: i.e. high definition multimedia interface, high definition multimedia interface. Is a fully digital video and audio transmission interface capable of transmitting uncompressed audio and video signals. HDMI can be used for set top boxes, DVD players, personal computers, televisions, game consoles, combination expansion machines, digital audio and television sets, and other devices. HDMI can send audio frequency and video signal simultaneously, because audio frequency and video signal adopt same wire rod, simplify the installation degree of difficulty of system's circuit greatly.

VRR: i.e., variable Refresh Rate, variable refresh rate. The technology is used for dynamically adjusting the refresh rate of the display according to real-time requirements, so that the problems of screen tearing (screen tearing), image delay (input lag) and the like can be reduced or eliminated, and the smoothness and quality of the displayed video are improved.

Screen tearing: the method refers to the phenomenon that when the previous frame of picture is not completely disappeared, a new frame of picture is displayed, and a viewer can see that two different frames of pictures appear on a screen at the same time. In general, the reason for tearing the screen is that the frame rate of video data does not uniformly conflict with the refresh rate of the display after the display receives the video data. Referring to fig. 1A, since the frame image (120 frames) received by the display for one second is larger than the frame image (60 frames) that the display can display for one second, the display forcibly displays two frame images within the time of displaying one frame image, and the effect is shown with reference to fig. 1B.

Image delay: when the previous frame of picture is displayed, the picture of the next frame is not displayed, and the audience can feel obvious clamping. In general, image delay is caused because a frame rate of video data does not uniformly collide with a refresh rate of a display after the display receives the video data. Referring to fig. 2, since the frame image (30 frames) received by the display for one second is smaller than the frame image (60 frames) that the display can display for one second, the display can display only one frame image for two frames of frame images, and the viewer can feel a noticeable click.

SOC: i.e., system on Chip. The chip design method is characterized in that various functional modules are integrated in the chip under the method, and the functions of each functional module are realized by hardware description language design programs and then circuits in the chip.

HSYNC: i.e., horizontal synchronization signal, a horizontal synchronization signal, also known as a row synchronization signal. Illustratively, referring to FIG. 3, in a frame image structure, HSYNC represents the beginning of a line in a scanned frame image when the frame image is scanned.

VSYNC: i.e., vertical synchronization signal, a vertical synchronization signal, also known as a frame synchronization signal. Illustratively, referring to FIG. 3, in the frame image structure, VSYNC represents the beginning of scanning a frame image when scanning a frame image.

Hsync_width: i.e. the length of the horizontal synchronization signal, also called the row synchronization signal pulse width. Illustratively, referring to fig. 3, in the frame image structure, hsync_width is used to indicate the length 136 of the horizontal synchronization signal in the horizontal direction in pixels.

Vsync_width: i.e., the length of the vertical synchronization signal, also known as the frame synchronization signal pulse width. Illustratively, referring to fig. 3, in the frame image structure, vsync_width is used to indicate the length 6 of the vertical synchronization signal in the vertical direction in units of the number of pixels.

HBP: i.e. horizontal back porch, horizontal back shoulder. Illustratively, referring to fig. 3, in the frame image structure, HBP is used to indicate a section from the end of HSYNC to the start of the effective display area in the horizontal direction when scanning the frame image, and the length is 160.

H_act: i.e. horizontal active, the horizontal effective display length. Illustratively, referring to fig. 3, in the frame image structure, h_act is used to indicate the length 1024 of the effective display area in the horizontal direction.

HFP: i.e. horizontal front porch, horizontal front shoulder. Illustratively, referring to fig. 3, in the frame image structure, HFP is used to indicate a section from the end of the effective display area to the beginning of HSYNC in the horizontal direction, and the length is 24 when scanning the frame image.

H_blank: i.e. horizontal blanking, a horizontal blanking area, also called line blanking or horizontal blanking. Illustratively, referring to fig. 3, in the frame image structure, h_blank=hsync_width+hbp+hfp=136+160+24=320.

H_total: i.e. the number of pixels in the horizontal direction. Illustratively, referring to fig. 3, in the frame image structure, h_total=h_blank+h_act=320+1024=1344.

VBP: i.e. vertical back porch, vertical back shoulder. Illustratively, referring to fig. 3, in the frame image structure, VBP is used to indicate a section from VSYNC end to effective display region start in the vertical direction when scanning a frame image, and the length is 29.

V_act: i.e., vertical active, the length is displayed vertically active. Illustratively, referring to fig. 3, in the frame image structure, v_act is used to indicate the length 768 of the effective display area in the vertical direction.

VFP: i.e. vertical front porch, perpendicular to the front shoulder. For example, referring to fig. 3, in the frame image structure, VFP is used to indicate a section in the vertical direction from the end of the effective display area to the start of VSYNC, and the length is 3.

V_blank: i.e., vertical blank, also known as frame blanking or vertical blanking. Illustratively, referring to fig. 3, in the frame image structure, v_blank=vsync_width+vbp+vfp=6+29+3=38.

V_total: i.e. the vertical total, the number of rows of pixels in the vertical direction. Illustratively, referring to fig. 3, in the frame image structure, v_total=v_blank+v_act=38+768=806.

PCLK: i.e. pixel clock, for representing the number of pixels that the display device can scan per unit time (1 second), in part of the scheme denoted DCLK (dot clock), PCLK is the dominant component in this application.

Currently, more and more display screens are beginning to support VRR signaling. The VRR is an HDMI technology, which can automatically adjust the refresh rate of a television or a display in real time to match and compatible with the frame rate output by various video source devices (such as a game machine, a personal computer and the like), so that smooth watching experience is brought to audience.

However, due to the difference of technologies adopted by different manufacturers or different types of display devices, when the frame rate of the input VRR signal is changed greatly, the brightness of the display screen partially supporting the VRR function is not consistent, and there is a significant change in brightness.

For a VRR-enabled display, the charge time for each frame is the same for the highest refresh rate and the lowest refresh rate, except that the blank gap (h_blank and v_blank) between the two frames is different at different refresh rates. At low refresh rates, the blank gap between two frames will be longer because the PCLK of the display is fixed. Because the blank gap does not display images, the display can leak electricity in the blank gap to cause voltage attenuation, and longer blank gap can aggravate the electricity leakage phenomenon of the display, and finally the display brightness attenuation of the display is serious. In contrast, at a high refresh rate, the blank gap between two frames is shorter, and in the shorter blank gap, the leakage phenomenon of the display is less serious than that of the display at a low refresh rate, so that the display brightness of the display is only slightly attenuated.

When the display is adapted to the frame rate of the video data by continuously adjusting the refresh rate, the voltage attenuation degree is different due to the difference of the blank gaps between two frames corresponding to different refresh rates, and the brightness attenuation degree is also different due to the voltage attenuation. For the user, the flicker of the picture is perceived, and the viewing experience of the user is reduced.

In view of the above problems, a display method is provided in an embodiment of the present application, where the display method may be applied to a display device, where a display of the display device has a VRR function, and the display device may calculate a frame rate of video data sent by a video source device, and adjust display brightness of the display in real time according to the frame rate. That is, the scheme can improve the phenomenon that the display brightness is obviously changed due to the change of the frame rate of the video data, and improve the use experience of users.

Fig. 4 is a schematic diagram showing a composition structure of a display system to which a display method is applied according to an exemplary embodiment. Referring to fig. 4, the display system includes a display device 200 and a video source device 400.

Wherein a user can control the display device 200 through the mobile terminal 300 and the control apparatus 100. The control device 100 may be a remote control, and the communication between the remote control and the display apparatus 200 includes infrared protocol communication, bluetooth protocol communication, and wireless or other wired manner to control the display apparatus 200. The user may control the display device 200 by inputting user instructions through keys on a remote control, voice input, control panel input, etc. In addition, the display apparatus 200 may directly receive a voice input or a voice command of a user through a module (e.g., MIC) configured therein to acquire a voice command. In some embodiments, tablet computers, notebook computers, and other smart devices may also be used to control the display device 200.

In some embodiments, the mobile terminal 300 and the display device 200 may have the same or matched software applications installed thereon, so as to implement connection communication through a network protocol, thereby achieving the purpose of one-to-one control operation and data communication. In this case, the audio and video contents displayed on the mobile terminal 300 may also be transmitted to the display device 200, implementing a synchronous display function.

Data communication between the display device 200 and the video source device 400 may be via limited or wireless communication. The video source device 400 may provide various contents and interactions to the display device 200, for example, the video source device 400 may send video data with different frame rates to the display device, or the video source device 400 may cooperate with the display device 200 to implement the display scheme of the present application.

For example, in the embodiment of the application, the display device may have various implementation forms, and may be, for example, a television, a smart television, a laser projection device, a monitor (monitor), an electronic whiteboard (electronic bulletin board), an electronic desktop (electronic table), or a display device capable of performing variable refresh rate display. The embodiment of the present application does not limit the specific form of the display device herein. In the embodiment of the application, a display device is taken as a television set as an example for schematic description.

Illustratively, in the embodiment of the present application, the video source device 400 may be provided with a device capable of providing video data, such as a set top box, a PC (personal computer ) device, or the like, having an HDMI interface. In the embodiment of the present application, the video source device 400 may provide video data with a variable frame rate or different video data with different frame rates to the display device 200.

Fig. 5 illustrates a block diagram of one possible configuration of a control device 100. As shown in fig. 5, the control device 100 includes a controller 210, a communication interface 230, a user input/output interface 240, a memory, and a power supply. The control apparatus 100 may receive an input operation instruction (e.g., a voice instruction) of a user, and convert the operation instruction into an instruction recognizable and responsive to the display device 200, which serves as an interaction medium between the user and the display device 200.

By way of example, taking a display device as a television set as an example, fig. 6 shows a schematic structural diagram of a display device 200 according to an embodiment of the present application.

As shown in fig. 6, the display apparatus 200 includes at least one of a modem 110, a communicator 120, a detector 130, an external device interface 140, a controller 150 (or referred to as a processor 150), a display 160, an audio output interface 170, a memory, a power supply, and a user interface.

In some embodiments the controller includes a processor, a video processor, an audio processor, a graphics processor, RAM, ROM, a first interface for input/output to an nth interface.

The display 160 includes a display screen component for presenting a picture, and a driving component for driving image display, a component for receiving an image signal from the controller output, displaying video content, image content, and a menu manipulation Interface, and a user manipulation User Interface (UI).

The display 160 may be a liquid crystal display, an OLED display, a projection device, or a projection screen.

The communicator 120 is a component for communicating with external devices or servers according to various communication protocol types. For example: the communicator may include at least one of a Wifi module, a bluetooth module, a wired ethernet module, or other network communication protocol chip or a near field communication protocol chip, and an infrared receiver. The display apparatus 200 may establish transmission and reception of control signals and data signals with the external control apparatus 200 or the video source apparatus 400 through the communicator 120.

A user interface, which may be used to receive control signals from the control device 100 (e.g., an infrared remote control, etc.).

The detector 130 is used to collect signals of the external environment or interaction with the outside. For example, the detector 130 includes a light receiver, a sensor for collecting the intensity of ambient light; alternatively, the detector 130 includes an image collector such as a camera, which may be used to collect external environmental scenes, attributes of a user, or user interaction gestures, or alternatively, the detector 130 includes a sound collector such as a microphone, etc. for receiving external sounds.

The external device interface 140 may include, but is not limited to, the following: high Definition Multimedia Interface (HDMI), analog or data high definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, etc. The input/output interface may be a composite input/output interface formed by a plurality of interfaces.

The modem 110 receives broadcast television signals through a wired or wireless reception manner, and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

In some embodiments, the controller 150 and the modem 110 may be located in separate devices, i.e., the modem 110 may also be located in an external device to the host device in which the controller 150 is located, such as an external set-top box or the like.

The controller 150 controls the operation of the display device and responds to the user's operations through various software control programs stored on the memory. The controller 150 controls the overall operation of the display apparatus 200. For example: in response to receiving a user command for selecting a UI object to be displayed on the display 160, the controller 150 may perform an operation related to the object selected by the user command.

In some embodiments the controller includes at least one of a central processing unit (Central Processing Unit, CPU), video processor, audio processor, graphics processor (Graphics Processing Unit, GPU), RAM Random Access Memory, RAM), ROM (Read-Only Memory, ROM), first to nth interfaces for input/output, a communication Bus (Bus), and the like.

The user may input a user command through a Graphical User Interface (GUI) displayed on the display 160, and the user input interface receives the user input command through the Graphical User Interface (GUI). Alternatively, the user may input the user command by inputting a specific sound or gesture, and the user input interface recognizes the sound or gesture through the sensor to receive the user input command.

A "user interface" is a media interface for interaction and exchange of information between an application or operating system and a user, which enables conversion between an internal form of information and a user-acceptable form. A commonly used presentation form of the user interface is a graphical user interface (Graphic User Interface, GUI), which refers to a user interface related to computer operations that is displayed in a graphical manner. It may be an interface element such as an icon, a window, a control, etc. displayed in a display screen of the display device, where the control may include at least one of a visual interface element such as an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget, etc.

It will be appreciated that in general, implementation of display device functions requires software in addition to the hardware support described above.

In some embodiments, taking an Android system as an example of an operating system used by the display device 200, referring to fig. 7, the system of the display device 200 may be divided into four layers, namely, an application layer (application layer), an application framework layer (Application Framework layer), a An Zhuoyun line (Android run time) and a system library layer (system runtime layer), and a kernel layer.

In some embodiments, at least one application program is running in the application program layer, and these application programs may be a Window (Window) program of an operating system, a system setting program, a clock program, or the like; or may be an application developed by a third party developer. In the embodiment of the present application, the application layer may include a frame rate calculation application, which is specifically configured to invoke the communication interface of the display device 200 to send the video data received by the display device 200 to the video source device 400 for performing frame rate calculation. In particular implementations, the application packages in the application layer are not limited to the above examples.

The framework layer provides an application programming interface (application programming interface, API) and programming framework for the application. The application framework layer includes a number of predefined functions or services. The application framework layer corresponds to a processing center that decides to let the applications in the application layer act. Through the API interface, the application program can access the resources in the system and acquire the services of the system in the execution.

As shown in fig. 7, the application framework layer in the embodiment of the present application includes a manager (manager), a Content Provider (Content Provider), a View system (View system), and the like, where the manager includes at least one of the following modules: an Activity Manager (Activity Manager) is used to interact with all activities that are running in the system; a Location Manager (Location Manager) is used to provide system services or applications with access to system Location services; a Package Manager (Package Manager) for retrieving various information about an application Package currently installed on the device; a notification manager (Notification Manager) for controlling the display and clearing of notification messages; a Window Manager (Window Manager) is used to manage icons, windows, toolbars, wallpaper, and desktop components on the user interface.

In some embodiments, the activity manager is used to manage the lifecycle of the individual applications as well as the usual navigation rollback functions, such as controlling the exit, opening, fallback, etc. of the applications. The window manager is used for managing all window programs, such as obtaining the size of the display screen, judging whether a status bar exists or not, locking the screen, intercepting the screen, controlling the change of the display window (for example, reducing the display window to display, dithering display, distorting display, etc.), etc.

In some embodiments, the system runtime layer provides support for the upper layer, the framework layer, and when the framework layer is in use, the android operating system runs the C/C++ libraries contained in the system runtime layer to implement the functions to be implemented by the framework layer.

In some embodiments, the kernel layer is a layer between hardware and software. The kernel layer contains at least one of the following drivers: audio drive, display drive, bluetooth drive, camera drive, WIFI drive, USB drive, HDMI drive, sensor drive (e.g., fingerprint sensor, temperature sensor, pressure sensor, etc.), MIC drive, power drive, etc.

The video data referred to in the present application may be data authorized by the user or sufficiently authorized by the parties.

The method in the following embodiments may be implemented in a display device having the above-described hardware structure and software structure. The following describes a display method provided in the embodiment of the present application.

Referring to fig. 8, an embodiment of the present application provides a display method, which is applied to a display device, where a display of the display device has a VRR function, and the method may include S810-S840:

s810, receiving video data.

In some examples, the display device may receive video data sent from a video source device, where the video data may be data formed by sampling and compressing video, or may be data generated in real time by rendering. For example, the video data may be video data stored in a storage device or may be video data generated by real-time rendering by a rendering device.

In some examples, the video data is generated by rendering in real time, the display device is a television, and the rendering device is a game host. The game host renders video data in real-time, and the frame rate of the video data may include a first frame rate and a second frame rate, the first frame rate and the second frame rate being different in value, such as 60Hz and 120Hz. The game host sends the video data generated by the real-time rendering to the display device, and the display device controls the display to play the video data.

It will be appreciated that in practical applications, the frame rate of a piece of video data may be varied, for example, a piece of video data includes three frame rates of 30Hz, 60Hz, and 120Hz simultaneously. The number of frame rates of video data is not limited in this application.

As shown in connection with fig. 7, in the case where the video source device is in the same local area network as the display device, the video source device needs to transmit video data to the display device. Video data transmitted from the video source device is received by an application program in the application layer of the display device, which has a function of receiving video data (i.e., S810).

In some embodiments, since a change in the frame rate of the video data may cause flickering of the display screen, the display device needs to first determine the frame rate of the video data in order to adjust the display brightness in real time according to the change in the frame rate of the video data. Based on this, after S810, S820 is performed.

S820, determining the frame rate of the video data.

The frame rate of the video data may include a first frame rate and a second frame rate, which are different in value from each other. For example, the first frame rate may be 60Hz and the second frame rate may be any other frame rate than 60 Hz.

It will be appreciated that in practical applications, where the frame rate difference is not large, the display luminance is not significantly attenuated due to the difference in frame rate of the video data, and the viewer cannot perceive the subtle luminance change with the naked eye, and at this time, the frame rate in a smaller frame rate range may be regarded as a level of frame rate, for example, the first frame rate; the frame rate in the other smaller frame rate range is considered to be another level of frame rate, e.g. the second frame rate. For example, the first frame rate may be a frame rate in the range of 48Hz-60Hz and the second frame rate may be a frame rate in the range of 60Hz-80 Hz.

In some examples, the video source device may send the frame rate of the video data along with other parameter information to the display device as the video data is being generated, and the display device may directly parse the parameter information to determine the frame rate of the video data after receiving the video data.

In other embodiments, the display device may calculate the frame rate of the video data from the video data after receiving the video data. Specifically, after the display device acquires video data, first, a frame of frame image may be acquired; secondly, scanning the frame image to determine characteristic parameters and pixel clock parameters of the frame image; finally, the frame rate of the video data is calculated according to the characteristic parameters and the pixel clock parameters.

As shown in fig. 7, an application program (having a frame rate calculating function) in the application layer of the display device can calculate the frame rate of video data from the video data.

In some examples, after determining the frame rate of the video data, the display brightness of the display needs to be adjusted according to the frame rate to ensure that the display brightness of the display remains at the standard brightness. Based on this, after S820, the display apparatus performs S830 or S840 according to the frame rate of the video data.

S830, when the frame rate of the video data is the first frame rate, adjusting the compensation voltage of the display to the first voltage so that the display brightness of the display is the standard brightness.

Wherein the first frame rate belongs to a first frame rate range, for example, 48Hz, and the compensation voltage is used for compensating voltage attenuation generated in a blank gap region between frame images of video data.

In some examples, the display device adjusts the compensation voltage of the display to the first voltage in a case where it is determined that the frame rate of the video data is within the first frame rate range such that the display brightness of the display is guaranteed to be at the standard brightness. Specifically, after the display device determines that the frame rate of the video data is the first frame rate, when a blank gap (blank area) between two frames is scanned, that is, when a leakage phenomenon occurs to cause voltage attenuation of the display, the compensation voltage applied to the display is adjusted in real time, so as to slow down the voltage attenuation degree of the display, and finally, the display brightness of the display is maintained at the standard brightness.

For example, referring to FIG. 9A, the first frame rate is 60Hz, and the display voltage will decay to V1 without real time adjustment of the compensation voltage when the V_blank region is scanned; if the compensation voltage is adjusted in real time, referring to the dashed line portion of fig. 9B, the voltage attenuation degree of the display can be effectively slowed down, so as to maintain the display brightness of the display to be standard brightness.

S840, when the frame rate of the video data is changed from the first frame rate to the second frame rate, the compensation voltage of the display is adjusted to the second voltage so that the display brightness of the display is the standard brightness.

Wherein the second frame rate belongs to the second frame rate range, and the compensation voltage is used for compensating voltage attenuation generated by a blank gap area between frame images of the video data.

In some examples, the display device adjusts the compensation voltage of the display to the second voltage in a case where it is determined that the frame rate of the video data is within the second frame rate range such that the display brightness of the display is guaranteed to be at the standard brightness. Specifically, when the display device determines that the frame rate of the video data changes from the first frame rate to the second frame rate, and when a blank gap (blank area) between two frames is scanned, that is, when a leakage phenomenon occurs to cause voltage attenuation of the display, the compensation voltage applied to the display is adjusted in real time, so as to slow down the voltage attenuation degree of the display, and finally, the display brightness of the display is maintained at the standard brightness.

For example, referring to FIG. 9A, the first frame rate is 120Hz, when the V_blank area is scanned, if the compensation voltage is not adjusted in real time, the voltage of the display will be attenuated to V2, and as the V_blank area of 120Hz is shorter than the V_blank area of 60Hz, the leakage time is shorter, the voltage attenuation degree is smaller, and V2 is larger than V1; if the compensation voltage is adjusted in real time, referring to the dashed line portion of fig. 9C, the voltage attenuation degree of the display can be effectively slowed down, so as to maintain the display brightness of the display to be standard brightness.

It is understood that in practical applications, the display device may adjust the compensation voltage of the display to the second voltage in addition to the case where the frame rate of the video data is changed from the first frame rate to the second frame rate, or in the case where the frame rate of the video data is directly determined to be the second frame rate.

In the technical solutions corresponding to S810 to S840, after receiving the video data, the display device first determines the frame rate of the video data, adjusts the compensation voltage to be the first voltage in real time if the frame rate of the video data is the first frame rate, and adjusts the compensation voltage to be the second voltage in real time if the frame rate of the video data is changed from the first frame rate to the second frame rate, so that the display brightness of the display is always maintained at the standard brightness. Therefore, in the technical scheme, the display device can dynamically adjust the compensation voltage of the display according to the change of the frame rate, so that the voltage attenuation of the blank gaps between the frame images under different frame rates tends to be stable when the display device realizes the VRR function, the flicker of the display screen caused by the change of the video frame rate when the display device realizes the VRR function is reduced, the overall brightness of the display screen is stabilized, and the use experience of a user is improved.

In some examples, to determine the frame rate of the video data, the display device may obtain a characteristic parameter of a frame image in the video data and a pixel clock parameter of the display, and calculate the frame rate of the video data from the characteristic parameter and the pixel clock parameter. Based on this, referring to fig. 10 in conjunction with fig. 8, S820 may specifically include S1010 and S1020.

S1010, acquiring characteristic parameters of a frame image in video data and pixel clock parameters of a display.

Wherein the characteristic parameter is used to characterize the size of the frame image and the pixel clock parameter is used to indicate the number of pixels that the display can scan per second 2. For the same display device, the pixel clock parameter is fixed, i.e. the number of pixels that the display device can scan for one second is fixed. Also, since the pixel clock parameter is equal in value to one half of the product of the area of the frame image and the frame rate, the display apparatus can calculate the frame rate of the video data with determining the pixel clock parameter and the characteristic parameter characterizing the size of the frame image.

In some examples, the display device is a television, and the video source device is a game console. The PCLK (pixel clock parameter) of the television is fixed, and the television can directly acquire the parameter. The characteristic parameters of the frame images can be obtained when the game host computer renders and generates video data, and the characteristic parameters of each frame image are sent to the television together with the video data, so that the television can obtain the characteristic parameters while analyzing the video data.

S1020, calculating the frame rate of the frame image according to the characteristic parameters and the pixel clock parameters.

For example, the frame rate of the frame image may be calculated according to the characteristic parameter and the pixel clock parameter by using the following formula:

the Frame rate is the Frame rate of the video data, the Rrefresh rate is the refresh rate of the display, the PCLK is the pixel clock parameter of the display, and the S is the area of the Frame image calculated according to the feature parameter, and the unit is pixel.

In some examples, the pixel clock parameter PCLK is 594Mhz (i.e., the display can be refreshed 594X 10 in one second ⁶ Pixels), the area S of the frame image calculated from the feature parameters is 2.475×10 ⁷ (i.e., the frame images together share 2.475×10) ⁷ A number of pixels) may be calculated, the frame rate of the video data corresponding to the frame image is 48Hz.

In other examples, the pixel clock parameter is 594Mhz (i.e., the display can be refreshed 594X 10 in one second ⁶ Pixels), feature parameters of 9.9x10 ⁶ (i.e., the frame images together share 9.9X10) ⁶ A number of pixels) may be calculated, the frame rate of the video data corresponding to the frame image is 120Hz.

In some examples, the characteristic parameters characterizing the frame image size include parameters of a line sync signal pulse width, a horizontal back shoulder, a horizontal effective display length, a horizontal front shoulder, a frame sync signal pulse width, a vertical back shoulder, a vertical effective display length, and a vertical front shoulder. The display device may directly acquire these parameters while scanning the display frame image, and then calculate the frame rate of the video data corresponding to the frame image according to the feature parameter and the pixel clock parameter. Based on this, referring to fig. 11 in conjunction with fig. 10, S1020 includes s1110_s1140.

Step S1110, calculating the row length of the frame image according to the row synchronous signal pulse width, the horizontal back shoulder, the horizontal effective display length and the horizontal front shoulder.

As shown in fig. 3, the pulse width of the row synchronization signal (hsync_width) indicates the length of the horizontal synchronization signal in the horizontal direction. The horizontal back shoulder (HBP) is used to indicate a section from the end of the line synchronization signal to the start of the active display area. The horizontal effective display length (h_act) is used to indicate the length of the effective display area in the horizontal direction. The horizontal front shoulder (HFP) is used to indicate the interval from the end of the active display area to the beginning of the HSYNC.

In some examples, the display device may determine hsync_ width, HBP, H _act and HFP when scanning a frame image. For example, in a certain line, a section from the start of HSYNC to the end of HSYNC is defined as hsync_width, a section from the end of HSYNC to the start of active display area is defined as HBP, a section from the start of active display to the end of active display is defined as h_act, and a section from the end of active display to the start of HSYNC in the next line is defined as HFP.

In some examples, the line length (h_total) of the frame image is calculated after determining hsync_ width, HBP, H _act and HFP, and is the sum of hsync_ width, HBP, H _act and HFP, i.e., h_total=hsync_width+hbp+h_act+hfp.

Step S1120, calculating the frame length of the frame image according to the pulse width of the frame synchronous signal, the vertical back shoulder, the vertical effective display length and the vertical front shoulder.

Referring to fig. 3, a row synchronization signal pulse width (vsync_width) indicates a length of the vertical synchronization signal in a vertical direction. A vertical back shoulder (VBP) is used to indicate a section from the end of the frame sync signal to the start of the active display area. The vertical effective display length (v_act) is used to indicate the length of the effective display area in the vertical direction. The horizontal front shoulder (VFP) is used to indicate a section from the end of the active display area to the beginning of VSYNC.

In some examples, the display device may determine vsync_ width, VBP, V _act and VFP when scanning a frame image. For example, in a certain frame, a section from VSYNC start to VSYNC end in the vertical direction is defined as vsync_width, a section from VSYNC end to active display area start in the vertical direction is defined as VBP, a section from active display start to active display end in the vertical direction is defined as v_act, and a section from active display end to next line in the vertical direction is defined as VFP.

In some examples, the line length (v_total) of the frame image is calculated after determining vsync_ width, VBP, V _act and VFP, the line length being the sum of vsync_ width, VBP, V _act and VFP, i.e., v_total=vsync_width+vbp+v_act+vfp.

In practical applications, for the same display device, the line length of a video data frame image is generally fixed, and the frame length varies with the variation of the video frame rate. However, it is understood that the present application is not limited to a fixed frame length, or a fixed line length.

In some examples, since it is necessary to calculate the frame rate of video data corresponding to a frame image from the frame area of the frame image and the pixel clock parameter, the frame area is calculated after the frame length and the line length are determined. Based on this, after S1120, S1130 is performed.

S1130, calculating the frame area of the frame image according to the line length and the frame length.

Where the frame area is the product of the row length and the frame length. Illustratively, taking a line length of 4400 and a frame length of 2250 as an example, the frame area=4400×2250=9.9×10 ⁶ 。

S1140, calculating the frame rate of the frame image according to the frame area and the pixel clock parameters.

Wherein the pixel clock parameter is equal in value to one half of the product of the frame area and the frame rate, the display device can calculate the frame rate of the video data with the pixel clock parameter and the frame area determined.

Wherein, frame rate is the Frame rate of video data, rrefresh rate is the refresh rate of the display, PCLK is the pixel clock parameter of the display, S is the area of the Frame image calculated according to the line length and the Frame length, the unit is pixel, H_total is the line length, and V_total is the Frame length.

In some examples, the pixel clock parameter is 594Mhz (i.e., the display can be refreshed 594X 10 in one second) ⁶ Pixels), frame area of 2.475×10 ⁷ (i.e., the frame images together share 2.475×10) ⁷ A number of pixels) may be calculated, the frame rate of the video data corresponding to the frame image is 48Hz.

In other examples, the pixel clock parameter is 594Mhz (i.e., the display can be refreshed 594X 10 in one second ⁶ Pixels), frame area of 9.9x10 ⁶ (i.e., the frame images together share 9.9X10) ⁶ A number of pixels) may be calculated, the frame rate of the video data corresponding to the frame image is 120Hz.

In the technical schemes corresponding to S1110 to S1140, first, the display device obtains a line synchronization signal pulse width, a horizontal back shoulder, a horizontal effective display length, a horizontal front shoulder, a frame synchronization signal pulse width, a vertical back shoulder, a vertical effective display length, and a vertical front shoulder of a frame image; secondly, calculating the row length and the frame length according to the parameters; then, calculating the frame area of the frame image according to the line length and the frame length; and finally, calculating the frame rate of the frame image according to the frame area and the pixel clock parameters. Therefore, the technical scheme can calculate the frame rate of the video data more accurately, thereby providing data support for the follow-up display equipment to adjust the compensation voltage according to the frame rate in real time.

In the technical schemes corresponding to S1010 to S1020, the display device first obtains the characteristic parameters of the frame image in the video data and the pixel clock parameters of the display, and then calculates the frame rate of the frame image according to the characteristic parameters and the pixel clock parameters. Therefore, the technical scheme can accurately calculate the frame rate of the video data, thereby providing data support for the follow-up display equipment to adjust the display brightness of the display in real time according to the frame rate.

In some examples, in the event that the frame rate of the video data is determined to be the first frame rate, the display device requires the display to apply a first voltage corresponding to the first frame rate. Based on this, referring to fig. 12 in conjunction with fig. 11, S830 includes S1210 and S1220, and S840 includes S1230 and S1240.

S1210, determining a first voltage corresponding to the first frame rate from a preset association relationship when the frame rate of the video data is the first frame rate.

The preset association relationship comprises association relationships of a plurality of frame rate ranges and a plurality of compensation voltages, and the frame rate ranges comprise a first frame rate range. For example, the preset association relationship may include that the compensation voltage corresponding to 48Hz-60Hz is G1, the compensation voltage corresponding to 60Hz-80Hz is G2, the compensation voltage corresponding to 80Hz-100Hz is G3, and the compensation voltage corresponding to 100Hz-120Hz is G4. Taking the preset association relation as an example, if the first frame rate is 48Hz, determining a frame rate range corresponding to 48Hz, namely 48Hz-60Hz, in the preset association relation, and further determining that the first voltage is G1.

In some embodiments, the first voltage is less than the second voltage if the minimum frame rate in the first frame rate range is greater than the maximum frame rate in the second frame rate range, and the first voltage is greater than the second voltage if the maximum frame rate in the first frame rate range is less than the minimum frame rate in the second frame rate range.

Specifically, at low frame rates, the blank space between two frames is longer because PCLK of the display is fixed. Because the blank gap does not display images, the display can leak electricity in the blank gap to cause voltage attenuation, and longer blank gap can aggravate the leakage phenomenon of the display, so that the display brightness attenuation of the display is serious finally, and the corresponding compensation voltage required to maintain the brightness at the standard brightness is also larger. In contrast, at a high frame rate, the blank gap between two frames is shorter, and in the shorter blank gap, the leakage phenomenon of the display is less serious than that of the display at a low refresh rate, so that the attenuation degree of the display brightness of the display is smaller than that of the display at a low frame rate, and the corresponding compensation voltage required to maintain the brightness at the standard brightness is also smaller.

S1220, the compensation voltage of the display is adjusted to be the first voltage.

Specifically, after the display device determines that the frame rate of the video data is the first frame rate, when a blank gap (blank area) between two frames is scanned, that is, when a leakage phenomenon occurs to cause voltage attenuation of the display, the compensation voltage applied to the display is adjusted in real time, so as to slow down the voltage attenuation degree of the display, and finally, the display brightness of the display is maintained at the standard brightness.

Taking the first frame rate of 48Hz and the first voltage of G1 as an example, when the real device determines that the frame rate of the video data is 48Hz and then scans a blank gap (blank area) between two frames, that is, when the leakage phenomenon occurs to cause voltage attenuation of the display, the voltage applied to the display is adjusted to be G1 in real time, so as to slow down the voltage attenuation degree of the display, and finally, the display brightness of the display is maintained at the standard brightness.

S1230, in case that the frame rate of the video data is changed from the first frame rate to the second frame rate, determining a second voltage corresponding to the second frame rate from a preset association relationship.

Taking the example that the second frame rate is 120Hz, the preset association relation comprises 48Hz-60Hz corresponding G1, 60Hz-80Hz corresponding G2, 80Hz-100Hz corresponding G3 and 100Hz-120Hz corresponding G4, after the display device determines that the hiccup frame rate is 120Hz, the display device determines that the frame rate range corresponding to 120Hz, namely 100Hz-120Hz, in the preset association relation, and further determines that the second voltage is G4.

In some embodiments, after determining the second voltage corresponding to the second frame rate, the display device adjusts to the second voltage. After S1230, S1240 is performed.

S1240, adjusting the display to a second voltage.

Specifically, after the display device determines that the frame rate of the video data is the second frame rate, when a blank gap (blank area) between two frames is scanned, that is, when a leakage phenomenon occurs to cause voltage attenuation of the display, the voltage attenuation degree applied to the display is adjusted in real time, so as to slow down the voltage attenuation degree of the display, and finally, the display brightness of the display is maintained at the standard brightness.

Taking the first frame rate of 120Hz and the second voltage of G4 as an example, when the real device determines that the frame rate of the video data is 120Hz and then scans a blank gap (blank area) between two frames, that is, when the leakage phenomenon occurs to cause voltage attenuation of the display, the voltage applied to the display is adjusted to be G4 in real time, so as to slow down the voltage attenuation degree of the display, and finally, the display brightness of the display is maintained at the standard brightness.

In the technical solutions corresponding to S1210 to S1240, when the frame rate of the video data is the first frame rate, first, determining a first voltage corresponding to the first frame rate from a preset association relationship; then, the compensation voltage of the display is adjusted to the first voltage. In the case that the frame rate of the video data is a second frame rate, first, determining a second voltage corresponding to the second frame rate from a preset association relationship; then, the compensation voltage of the display is adjusted to a second voltage. Therefore, the technical scheme can adjust the compensation voltage of the display in real time according to the frame rate of the video data, maintain the display brightness of the display to be standard brightness, improve the flicker phenomenon of the display when the video data has a plurality of frame rates, and improve the use experience of users.

In an example embodiment of the present application, taking a video card adapter as a video source device and a television as a device to be displayed, a first frame rate is 48Hz, a first voltage is G1, a second frame rate is 120Hz, and a second voltage is G4 as an example, a display method provided in the present application may include a process shown in fig. 13, and referring to fig. 13, the display method provided in the present application may specifically include:

1, receiving video data.

For example, the television receives video data generated by the game host rendering, and the video data comprises two frame rates of 48Hz and 120 Hz.

And 2, determining pixel clock parameters.

For example, the pixel clock parameter of the television display is determined to be 594Mhz.

And 3, determining the row length of the frame image.

For example, the line length of a frame image in video data is fixed to 4400.

And 4, determining the frame length of the frame image.

For example, the frame length of a frame image in video data includes both cases 2250 and 5625.

And 5, determining the frame area of the frame image.

For example, the product of the line length and the frame length is calculated, and the frame area of the frame image in the video data includes 2.475×10 ⁷ And 9.9X10 ⁶ Both cases.

And 6, determining the frame rate of the video data according to the frame area and the pixel clock parameters.

For example, the frame area is 2.475×10 ⁷ In the case of (2), the calculated frame rate is 120Hz; at a frame area of 9.9X10 ⁶ In the case of (2), the calculated frame rate is changed from 120Hz to 48Hz.

7, when the frame rate of the video data is determined to be the first frame rate, determining a first voltage corresponding to the first frame rate. For example, in the preset association relationship, the first voltage corresponding to 48Hz is determined to be G1.

And 8, adjusting the compensation voltage to be a first voltage.

For example, when the frame rate is 48Hz, the compensation voltage is adjusted to G1 when the television scans a blank space between two frames, so as to maintain the display brightness of the display to be standard brightness.

9, in the case of determining that the frame rate of the video data is changed from the first frame rate to the second frame rate, determining a second voltage corresponding to the second frame rate.

For example, in the preset association relationship, the second voltage corresponding to 120Hz is determined to be G4.

And 10, adjusting the compensation voltage to be a second voltage.

For example, when the frame rate is 120Hz, the compensation voltage is adjusted to G4 when the television scans a blank space between two frames, so as to maintain the display brightness of the display to be standard brightness.

11, the flow ends.

The foregoing description of the solution provided in the embodiments of the present application has been mainly presented in terms of a method. To achieve the above functions, it includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application may divide the functional modules of the display device according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Referring to fig. 14, the embodiment of the present application provides a display device that may include a receiving module 141, a frame rate determining module 142, a first compensation voltage adjusting module 143, and a second compensation voltage adjusting module 144.

Specifically, the receiving module 141 is configured to receive video data; a frame rate determination module 142 for determining a frame rate of the video data; a first compensation voltage adjustment module 143, configured to adjust the compensation voltage of the display to a first voltage so that the display brightness of the display is a standard brightness when the frame rate of the video data is the first frame rate; the first frame rate belongs to a first frame rate range; the compensation voltage is used for compensating voltage attenuation generated in a blank gap area between frame images of the video data; the display adjusts the refresh rate of the display according to the frame rate of the video data required to be displayed by the display; a second compensation voltage adjustment module 144, configured to adjust the compensation voltage of the display to a second voltage so that the display brightness of the display is standard brightness, in a case where the frame rate of the video data is changed from the first frame rate to the second frame rate; the second frame rate belongs to a second frame rate range.

In one possible implementation, the frame rate determination module 142 is specifically configured to: acquiring characteristic parameters of a frame image in video data and pixel clock parameters of a display; the characteristic parameters are used for representing the size of a frame image, and the pixel clock parameters are used for indicating the number of pixels which can be scanned by the display per second; and calculating the frame rate of the frame image according to the characteristic parameters and the pixel clock parameters.

In one possible implementation, the characteristic parameters include: the frame rate determining module 142 is specifically configured to: calculating the line length of the frame image according to the line synchronous signal pulse width, the horizontal back shoulder, the horizontal effective display length and the horizontal front shoulder; calculating the frame length of the frame image according to the pulse width of the frame synchronous signal, the vertical back shoulder, the vertical effective display length and the vertical front shoulder; calculating the frame area of the frame image according to the line length and the frame length; and calculating the frame rate of the frame image according to the frame area and the pixel clock parameters.

In one possible implementation manner, the first compensation voltage adjustment module 143 is specifically configured to determine, in a case where the frame rate of the video data is the first frame rate, a first voltage corresponding to the first frame rate from a preset association relationship; the preset association relation comprises association relation of a plurality of frame rate ranges and a plurality of compensation voltages, wherein the frame rate ranges comprise a first frame rate range; the compensation voltage of the display is adjusted to a first voltage.

In one possible implementation, the second compensation voltage adjustment module 144 is specifically configured to: in the case that the frame rate of the video data is changed from the first frame rate to the second frame rate, determining a second voltage corresponding to the second frame rate from a preset association relationship; a plurality of frame rate ranges included in a preset association relation comprise a second frame rate range; and adjusting the compensation voltage of the display to a second voltage.

In one possible implementation, the first voltage is less than the second voltage if a minimum frame rate in the first frame rate range is greater than a maximum frame rate in the second frame rate range; the first voltage is greater than the second voltage if the maximum frame rate in the first frame rate range is less than the minimum frame rate in the second frame rate range.

It should be understood that the division of units or modules (hereinafter referred to as units) in the above apparatus is merely a division of logic functions, and may be fully or partially integrated into one physical entity or may be physically separated. And the units in the device can be all realized in the form of software calls through the processing element; or can be realized in hardware; it is also possible that part of the units are implemented in the form of software, which is called by the processing element, and part of the units are implemented in the form of hardware.

For example, each unit may be a processing element that is set up separately, may be implemented as integrated in a certain chip of the apparatus, or may be stored in a memory in the form of a program, and the functions of the unit may be called and executed by a certain processing element of the apparatus. Furthermore, all or part of these units may be integrated together or may be implemented independently. The processing element herein may also be referred to as a processor and may be an integrated circuit with signal processing capabilities. In implementation, each step of the above method or each unit above may be implemented by an integrated logic circuit of hardware in a processor element or in the form of software called by a processing element.

In one example, the units in the above apparatus may be one or more integrated circuits configured to implement the above method, for example: one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of at least two of these integrated circuit forms.

For another example, when the units in the apparatus may be implemented in the form of a scheduler of processing elements, the processing elements may be general-purpose processors, such as CPUs or other processors that may invoke programs. For another example, the units may be integrated together and implemented in the form of a system on chip SOC.

In one implementation, the above means for implementing each corresponding step in the above method may be implemented in the form of a processing element scheduler. For example, the apparatus may include a processing element and a storage element, the processing element invoking a program stored in the storage element to perform the display method of the above method embodiment. The memory element may be a memory element on the same chip as the processing element, i.e. an on-chip memory element.

In another implementation, the program for performing the above method may be on a memory element on a different chip than the processing element, i.e. an off-chip memory element. At this time, the processing element calls or loads a program from the off-chip storage element on the on-chip storage element to call and execute the display method of the above method embodiment.

Referring to fig. 15, the embodiment of the present application further provides a display device, including a display 151 configured to adjust a refresh rate of the display according to a frame rate of video data that the display needs to display; a communicator 153 configured to receive video data; a processor 152 coupled to the display and the communicator, respectively; the processor is configured to: determining a frame rate of the video data; when the frame rate of the video data is the first frame rate, adjusting the compensation voltage of the display to be the first voltage so that the display brightness of the display is standard brightness; the first frame rate belongs to a first frame rate range; the compensation voltage is used for compensating voltage attenuation generated in a blank gap area between frame images of the video data; in the case that the frame rate of the video data is changed from the first frame rate to the second frame rate, adjusting the compensation voltage of the display to the second voltage so that the display brightness of the display is standard brightness; the second frame rate belongs to a second frame rate range.

In one possible implementation, the processor 152 is configured to determine a frame rate of video data, including: acquiring characteristic parameters of a frame image in video data and pixel clock parameters of a display; the characteristic parameters are used for representing the size of a frame image, and the pixel clock parameters are used for indicating the number of pixels which can be scanned by the display per second; and calculating the frame rate of the frame image according to the characteristic parameters and the pixel clock parameters.

In one possible implementation, the characteristic parameters include: a line sync signal pulse width, a horizontal back porch, a horizontal effective display length, a horizontal front porch, a frame sync signal pulse width, a vertical back porch, a vertical effective display length, and a vertical front porch, the processor 152 configured to calculate a frame rate of a frame image based on the feature parameters, comprising: calculating the line length of the frame image according to the line synchronous signal pulse width, the horizontal back shoulder, the horizontal effective display length and the horizontal front shoulder; calculating the frame length of the frame image according to the pulse width of the frame synchronous signal, the vertical back shoulder, the vertical effective display length and the vertical front shoulder; calculating the frame area of the frame image according to the line length and the frame length; and calculating the frame rate of the frame image according to the frame area and the pixel clock parameters.

In one possible implementation, the processor 152 is configured to adjust the compensation voltage of the display to a first voltage in the case that the frame rate of the video data is the first frame rate, including: determining a first voltage corresponding to a first frame rate from a preset association relationship under the condition that the frame rate of the video data is the first frame rate; the preset association relation comprises association relation of a plurality of frame rate ranges and a plurality of compensation voltages, wherein the frame rate ranges comprise a first frame rate range; adjusting the compensation voltage of the display to a first voltage; the processor 152 is configured to adjust the compensation voltage of the display to a second voltage in case the frame rate of the video data is changed from the first frame rate to the second frame rate, comprising: in the case that the frame rate of the video data is changed from the first frame rate to the second frame rate, determining a second voltage corresponding to the second frame rate from a preset association relationship; a plurality of frame rate ranges included in a preset association relation comprise a second frame rate range; and adjusting the compensation voltage of the display to a second voltage.

The embodiment of the application also provides a display device, which may include: a display screen, a memory, and one or more processors. The display, memory, and processor are coupled. The memory is for storing computer program code, the computer program code comprising computer instructions. When the processor executes the computer instructions, the display device may perform the various functions or steps performed by the display device (e.g., television) in the method embodiments described above.

For example, the embodiment of the application also provides a chip, and the chip can be applied to the display device or the server. The chip includes one or more interface circuits and one or more processors; the interface circuit and the processor are interconnected through a circuit; the processor receives and executes computer instructions from the memory of the display device through the interface circuit to implement the methods of the above method embodiments.

Embodiments of the present application also provide a computer-readable storage medium having stored thereon computer program instructions (or referred to as instructions). The computer program instructions, when executed by a display device, enable the display device to implement a display method as described above.

Embodiments of the present application also provide a computer program product comprising computer instructions for operating a display device as described above, which when run in the display device, cause the display device to implement a display method as described above.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts shown as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. With such understanding, the technical solutions of the embodiments of the present application may be essentially or partly contributing to the prior art or all or part of the technical solutions may be embodied in the form of a software product, such as: and (5) program. The software product is stored in a program product, such as a computer readable storage medium, comprising instructions for causing a device (which may be a single-chip microcomputer, chip or the like) or processor (processor) to perform all or part of the steps of the methods of the various embodiments of the application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A display device, the display device comprising:

a display configured to adjust a refresh rate of the display according to a frame rate of video data that the display is to display;

a communicator configured to receive video data;

a processor coupled to the display and the communicator, respectively; the processor is configured to:

determining a frame rate of the video data;

when the frame rate of the video data is the first frame rate, adjusting the compensation voltage of the display to be the first voltage so that the display brightness of the display is standard brightness; the first frame rate belongs to a first frame rate range; the compensation voltage is used for compensating voltage attenuation generated by a blank gap area between frame images of the video data;

adjusting the compensation voltage of the display to a second voltage such that a display luminance of the display is the standard luminance, in a case where a frame rate of the video data is changed from the first frame rate to a second frame rate; the second frame rate belongs to a second frame rate range.

2. The display device of claim 1, wherein the processor configured to determine a frame rate of the video data comprises:

acquiring characteristic parameters of a frame image in the video data and pixel clock parameters of the display; wherein the characteristic parameter is used for representing the size of the frame image, and the pixel clock parameter is used for indicating the number of pixels which can be scanned by the display per second;

and calculating the frame rate of the frame image according to the characteristic parameters and the pixel clock parameters.

3. The display device of claim 2, wherein the characteristic parameters include: a row synchronization signal pulse width, a horizontal back shoulder, a horizontal effective display length, a horizontal front shoulder, a frame synchronization signal pulse width, a vertical back shoulder, a vertical effective display length and a vertical front shoulder; the processor is configured to calculate a frame rate of the frame image according to the characteristic parameter and the pixel clock parameter, and includes:

calculating the line length of the frame image according to the line synchronous signal pulse width, the horizontal back shoulder, the horizontal effective display length and the horizontal front shoulder;

calculating the frame length of the frame image according to the pulse width of the frame synchronous signal, the vertical back shoulder, the vertical effective display length and the vertical front shoulder;

Calculating the frame area of the frame image according to the line length and the frame length;

and calculating the frame rate of the frame image according to the frame area and the pixel clock parameter.

4. A display device according to any of claims 1-3, wherein the processor is configured to adjust the compensation voltage of the display to a first voltage if the frame rate of the video data is a first frame rate, comprising:

determining the first voltage corresponding to the first frame rate from a preset association relationship under the condition that the frame rate of the video data is the first frame rate; the preset association relation comprises association relation of a plurality of frame rate ranges and a plurality of compensation voltages, and the frame rate ranges comprise the first frame rate range;

adjusting a compensation voltage of the display to the first voltage;

the processor configured to adjust a compensation voltage of the display to a second voltage in a case where a frame rate of the video data is changed from the first frame rate to a second frame rate, comprising:

determining a second frame rate range from a preset association relationship in the case that the frame rate of the video data is changed from the first frame rate to the second frame rate;

And adjusting the compensation voltage of the display to the second voltage.

5. A display device according to any one of claims 1-3, wherein the first voltage is less than the second voltage if a minimum frame rate in the first frame rate range is greater than a maximum frame rate in the second frame rate range; the first voltage is greater than the second voltage if a maximum frame rate in the first frame rate range is less than a minimum frame rate in the second frame rate range.

6. A display method applied to a display device, a display of the display device having a variable refresh rate function, the display method comprising:

receiving video data;

determining a frame rate of the video data;

7. The display method of claim 6, wherein the determining the frame rate of the video data comprises:

8. The display method according to claim 7, wherein the characteristic parameters include: a row synchronization signal pulse width, a horizontal back shoulder, a horizontal effective display length, a horizontal front shoulder, a frame synchronization signal pulse width, a vertical back shoulder, a vertical effective display length and a vertical front shoulder; the calculating the frame rate of the frame image according to the characteristic parameters comprises the following steps:

9. The display method according to any one of claims 6 to 8, wherein adjusting the compensation voltage of the display to the first voltage in the case where the frame rate of the video data is the first frame rate includes:

adjusting a compensation voltage of the display to the first voltage;

the adjusting the compensation voltage of the display to a second voltage when the frame rate of the video data is changed from the first frame rate to a second frame rate includes:

determining the second voltage corresponding to the second frame rate from a preset association relation under the condition that the frame rate of the video data is changed from the first frame rate to the second frame rate; the second frame rate range is included in the plurality of frame rate ranges included in the preset association relation;

And adjusting the compensation voltage of the display to the second voltage.

10. The display method according to any one of claims 6 to 8, wherein the first voltage is smaller than the second voltage if a minimum frame rate in the first frame rate range is greater than a maximum frame rate in the second frame rate range; the first voltage is greater than the second voltage if a maximum frame rate in the first frame rate range is less than a minimum frame rate in the second frame rate range.