Display device and display control method

Abstract

The present application discloses a display device and a display control method, the display device comprising: a control unit capable of determining an output frequency of image data based on the image data and outputting a control signal corresponding to the image data at the output frequency, the image data being from an electronic device connected to the display device; a display unit capable of outputting an image corresponding to the image data in response to the control signal; wherein in the first working mode, the control unit outputs the control signal at a first frequency so as to enable the display unit to output an image at a first refresh frequency, and in the second working mode, the control unit outputs the control signal at a second frequency so as to enable the display unit to output an image at a second refresh frequency. The control unit outputs the control signal at a second frequency to enable the display unit to output the image at a second refresh frequency, the second refresh frequency is smaller than the first refresh frequency, and the images output based on the second refresh frequency meet the same condition.

Description

Technical Field

[0001] This application relates to the field of display technologies, and in particular, to a display device and a display control method. Background Art

[0002] With the development of display technologies, display devices are becoming more and more common in applications. Users have higher and higher requirements for display devices. Correspondingly, more and more functions are integrated in display devices, making how to optimize the power consumption of electronic devices a research focus for those skilled in the art. Summary of the Invention

[0003] In view of the above problems, this application provides a display device and a display control method, and the specific solutions are as follows:

[0004] A display device includes:

[0005] A control unit, capable of determining the output frequency of the image data based on the image data, and outputting a control signal corresponding to the image data at the output frequency, where the image data comes from an electronic device connected to the display device;

[0006] A display unit, capable of outputting an image corresponding to the image data in response to the control signal;

[0007] Wherein, in a first working mode, the control unit outputs the control signal at a first frequency so that the display unit outputs an image at a first refresh frequency;

[0008] In a second working mode, the control unit outputs the control signal at a second frequency so that the display unit outputs the image at a second refresh frequency, the second refresh frequency is less than the first refresh frequency, and each image output based on the second refresh frequency meets the same condition.

[0009] Optionally, in the first working mode, the control unit responds to a first instruction obtained, and controls the display unit to switch from the first working mode to the second working mode;

[0010] Or, in the first working mode, the control unit compares a first frame of image data and a second frame of image data in the image data it receives. The first frame of image data and the second frame of image data are two adjacent frames of image data. If the later-received second frame of image data and the earlier-received first frame of image data meet the same condition, the control unit controls the display unit to switch from the first working mode to the second working mode.

[0011] Optionally, in the second working mode, the control unit is further configured to:

[0012] The deflection angle data for controlling the liquid crystal molecules in the display unit is switched from the first data set to the second data set. For the same liquid crystal molecule, the deflection angle in the second data set is greater than that in the first data set;

[0013] Generate a second instruction and send it to the driving chip of the backlight module of the display unit, so that the driving chip responds to the second instruction and controls the driving current of the backlight module to decrease from the first current to the second current;

[0014] Wherein, when the driving current of the backlight module is the first current and the deflection data of the liquid crystal molecules in the display unit is the first data set, the display unit displays the first image; when the driving current of the backlight module is the second current and the deflection data of the liquid crystal molecules in the display unit is the second data set, the display unit displays the second image; the first image and the second image meet the same conditions.

[0015] Optionally, in the second working mode, the control unit is used to control the deflection angles of the liquid crystal molecules in the display unit to increase proportionally, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data set to the second data set; and / or, used to control the deflection angles of all the liquid crystal molecules in the display unit to increase by a first angle, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data set to the second data set.

[0016] Optionally, in the second working mode, the control unit is further used to:

[0017] Compare the received third-frame image data and fourth-frame image data. The third-frame image data and the fourth-frame image data are two adjacent frames of image data. If the later received fourth-frame image data and the earlier received third-frame image data meet the preset conditions, output the control signal corresponding to the fourth-frame image data at the second frequency, so that the display unit outputs the fourth-frame image data at the second refresh frequency; otherwise, control the display unit to exit the second working mode and output the control signal corresponding to the fourth-frame image data at the first frequency, so that the display unit outputs the fourth-frame image data at the first refresh frequency.

[0018] Optionally, the preset conditions include:

[0019] The reception time of the third-frame image data and the fourth-frame image data is less than the first preset time;

[0020] The number of regions with different display contents included in the display screens corresponding to the third-frame image data and the fourth-frame image data is less than the preset number, and the area of a single region with different display contents is less than the preset area;

[0021] Wherein, the first preset time is related to the second refresh frequency.

[0022] Optionally, the control unit is configured to control the display unit to exit the second working mode, and output a control signal corresponding to the fourth frame of image data at a first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency, including:

[0023] After controlling the display unit to exit the second working mode, output a control signal corresponding to the third frame of image data at a second frequency in a first time period, so that the display unit outputs the third frame of image data at the second refresh frequency, and output a control signal corresponding to the fourth frame of image data at the first frequency in a second time period, so that the display unit outputs the fourth frame of image data at the first refresh frequency, where the second time period is after the first time period.

[0024] A display control method is applied to a display device, and the display unit of the display device includes a first working mode and a second working mode; the display control method includes:

[0025] In the first working mode, output a control signal at a first frequency so that the display unit outputs an image at a first refresh frequency;

[0026] In the second working mode, output a control signal at a second frequency so that the display unit outputs the image at a second refresh frequency, where the second refresh frequency is less than the first refresh frequency, and each image output based on the second refresh frequency satisfies the same condition.

[0027] Optionally, the display control method further includes:

[0028] When the display unit is in the second working mode, in response to a obtained first instruction, control the display unit to switch from the first working mode to the second working mode;

[0029] Or,

[0030] When the display unit is in the second working mode, compare a first frame of image data and a second frame of image data in the received image data, where the first frame of image data and the second frame of image data are two adjacent frames of image data, and if the later received second frame of image data and the earlier received first frame of image data satisfy the same condition, control the display unit to switch from the first working mode to the second working mode;

[0031] Or,

[0032] When the display unit is in the second working mode, compare the third frame of image data and the fourth frame of image data received by it. The third frame of image data and the fourth frame of image data are two adjacent frames of image data. If the later-received fourth frame of image data and the earlier-received third frame of image data meet the preset conditions, output the control signal corresponding to the fourth frame of image data at the second frequency, so that the display unit outputs the fourth frame of image data at the second refresh frequency. Otherwise, control the display unit to exit the second working mode, and output the control signal corresponding to the fourth frame of image data at the first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency.

[0033] Optionally, the controlling the display unit to exit the second working mode and outputting the control signal corresponding to the fourth frame of image data at the first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency includes:

[0034] After controlling the display unit to exit the second working mode, output the control signal corresponding to the third frame of image data at the second frequency in the first time period, so that the display unit outputs the third frame of image data at the second refresh frequency, and output the control signal corresponding to the fourth frame of image data at the first frequency in the second time period, so that the display unit outputs the fourth frame of image data at the first refresh frequency. The second time period is after the first time period. Description of the Drawings

[0035] In combination with the accompanying drawings and with reference to the following specific embodiments, the above and other features, advantages and aspects of the various embodiments of the present disclosure will become more apparent. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and the original elements and elements are not necessarily drawn to scale.

[0036] Figure 1 Schematic diagram of a display device provided by the present application;

[0037] Figure 2 Schematic diagram of another display device provided by the present application;

[0038] Figure 3 Schematic diagram of yet another display device provided by the present application;

[0039] Figure 4 Flowchart of a display control method provided by an embodiment of the present application;

[0040] Figure 5 Flowchart of a display control method provided by an embodiment of the present application;

[0041] Figure 6Flowchart of the display control method provided by an embodiment of the present application. Detailed implementation manners

[0042] The following will clearly and completely describe the embodiments in the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0043] Without departing from the spirit or scope of the present application, various modifications and variations can be made in the present application, which are obvious to those skilled in the art. Therefore, the present application is intended to cover the modifications and variations of the present application that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation manners provided by the embodiments of the present application can be combined with each other without conflict.

[0044] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0045] As described in the background art section, how to optimize the power consumption of electronic devices has become a research hotspot for those skilled in the art.

[0046] In view of this, an embodiment of the present application provides a display device, as Figure 1 shown, the display device 100 includes:

[0047] A control unit 10, the control unit 10 can determine the output frequency of the image data based on the image data, and output a control signal corresponding to the image data at the output frequency, and the image data comes from an electronic device 200 connected to the display device 100;

[0048] A display unit 20, the display unit 20 can output an image corresponding to the image data in response to the control signal.

[0049] Specifically, in this embodiment, in the first working mode, the control unit outputs the control signal at a first frequency so that the display unit outputs an image at a first refresh frequency; in the second working mode, the control unit outputs the control signal at a second frequency so that the display unit outputs the image at a second refresh frequency, where the second refresh frequency is less than the first refresh frequency, and each image output based on the second refresh frequency satisfies the same condition.

[0050] It should be noted that in the embodiments of the present application, that the images output based on the second refresh frequency meet the same conditions may mean that all parameters of the images output based on the second refresh frequency are the same, or may mean that all parameters of the images output based on the second refresh frequency are basically the same. The present application does not make any limitation on this, as long as the image data corresponding to the images output based on the second refresh frequency is the same frame of image data.

[0051] Optionally, in an embodiment of the present application, the second frequency is the lowest frequency that the control unit can achieve when outputting a control signal, that is, the second refresh frequency is the lowest refresh frequency for the display unit to output an image, so as to minimize the power consumption of the display unit by reducing the refresh frequency of the image output by the display unit. However, the present application does not make any limitation on this, as long as the second refresh frequency is less than the first refresh frequency, the power consumption of the display unit can be reduced.

[0052] Optionally, in an embodiment of the present application, the display device may be a display device in devices such as a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc. The embodiments of the present application do not make any limitation on this.

[0053] When the display device provided by the embodiments of the present application outputs an image, the images output based on the second refresh frequency meet the same conditions, and the second refresh frequency is less than the first refresh frequency, so as to use a smaller second refresh frequency to output when outputting a display screen that meets the same conditions, reduce the power consumption of the display device, and be beneficial to the power consumption optimization of the display device.

[0054] Optionally, in an embodiment of the present application, in the first working mode, the control unit responds to the obtained first instruction and controls the display unit to switch from the first working mode to the second working mode. That is, in this embodiment, the control unit realizes the switching from the first working mode to the second working mode by responding to an external trigger instruction.

[0055] Based on the above embodiments, in an embodiment of the present application, the first instruction comes from an electronic device connected to the display device. Optionally, the electronic device may be a graphics card, that is, the image data received by the display device comes from the image data output by the graphics card connected thereto. In this embodiment, when the control unit controls the display unit to switch from the first working mode to the second working mode by responding to the obtained first instruction, the display device and the electronic device connected to the display device need to have the function of supporting the picture replay mode. It should be noted that the picture replay mode means that when the display device does not receive a new image data frame, it repeatedly outputs the last frame of image data it received.

[0056] Specifically, in the embodiments of the present application, the working process of the display device includes: First, the DPCD FW (DisplayPort Configuration Data Firmware) in the control unit announces support for FEC (Forward Error Correction) and panel replay, and self-announces support for this function; Then, when the electronic device (such as a graphics card) does not output image data, the electronic device will output the 1B0 bit position 1 to indicate that the electronic device enables the panel replay function. At this time, a handshake protocol is carried out between the control unit side and the electronic device side to indicate that both the control unit side and the electronic device side support the panel replay function. At this time, the control unit determines that the corresponding identification bit 1B0 is set to 1 and knows that it has entered the panel replay mode. The control unit continuously outputs the control signal corresponding to the last frame of image data it received at the second frequency (that is, the control unit will output the last frame of image data it received by itself and simulate a virtual EDID timing (Extended Display Identification Data Timing), that is, the control unit can control the refresh rate of the display unit by itself), so that the display unit outputs the image at the second refresh frequency, reducing the power consumption of the display unit. It should be noted that DPCD (DisplayPort Configuration Data): is a set of registers (or data structures) defined in the DisplayPort standard, used to store and manage the configuration information of the display device (such as resolution, color format, etc.). FW (Firmware): refers to firmware, that is, the underlying control software embedded in the hardware device, responsible for device initialization, configuration, and function implementation. EDID (Extended Display Identification Data) is a standard protocol for communication between the display device and the video source (such as a graphics card, game console, etc.), used to transmit the basic information of the display device and the supported display modes. Timing (timing) is a key part of EDID, defining the timing information such as the resolution, refresh rate, and synchronization signal parameters supported by the display device.

[0057] Optionally, in an embodiment of the present application, as Figure 2 shown, the display unit 20 includes a timing control circuit 21 and a display panel 22. The display panel 22 includes a plurality of display pixels. In this embodiment, the timing control circuit 21 responds to the control signal and controls the display panel 22 to output a display image at the first refresh frequency or the second refresh frequency.

[0058] In another embodiment of the present application, in the first working mode, the control unit compares the first frame image data and the second frame image data in the image data it receives. The first frame image data and the second frame image data are two adjacent frame image data. If the later-received second frame image data and the earlier-received first frame image data meet the same conditions, the control unit controls the display unit to switch from the first working mode to the second working mode. That is, in this embodiment, the control unit automatically controls the display unit to switch from the first working mode to the second working mode when the adjacent two frame image data it receives meet the same conditions by comparing them. In other embodiments of the present application, the control unit can also control the display unit to switch from the first working mode to the second working mode in other ways, and the present application does not limit this, which depends on the specific situation.

[0059] Based on any of the above embodiments, in an embodiment of the present application, the display unit is a liquid crystal display unit. In this embodiment, in the second working mode, the control unit is further configured to control the deflection angle of the liquid crystal molecules in the display unit to switch from the first data group to the second data group. For the same liquid crystal molecule, the deflection angle in the second data group is greater than the deflection angle in the first data group. Thus, by increasing the deflection angle of the liquid crystal molecules in the display unit, the light transmittance of the display unit is increased, so as to increase the gray scale gain value of each display pixel point in the display unit, thereby facilitating the display of a higher brightness picture with a lower brightness backlight, which is beneficial to reducing the power consumption of the display device.

[0060] Based on the above embodiments, in an embodiment of the present application, as Figure 3 shown, the display device 100 further includes a backlight unit 30. The backlight unit 30 includes a driving chip 31 and a backlight module 32. Optionally, in this embodiment, the control unit 10 is further configured to generate a second instruction and send it to the driving chip 31 of the backlight module 32 of the display unit 20, so that the driving chip 31 responds to the second instruction and controls the driving current of the backlight module 32 to decrease from the first current to the second current, thereby reducing the power consumption of the backlight unit 30 and further reducing the power consumption of the display device 100.

[0061] Optionally, in an embodiment of the present application, the proportion of the difference between the first current and the second current to the first current ranges from 30% to 50% to better reduce the power consumption of the backlight unit, but the present application does not limit this, which depends on the specific situation.

[0062] It should be noted that in the above embodiments, when the driving current of the backlight module is the first current and the deflection data of the liquid crystal molecules in the display unit is the first data set, the display unit displays the first image; when the driving current of the backlight module is the second current and the deflection data of the liquid crystal molecules in the display unit is the second data set, the display unit displays the second image; the first image and the second image meet the same conditions.

[0063] It should also be noted that in this embodiment, the first image and the second image meeting the same conditions may mean that the first image and the second image are exactly the same, or that the first image and the second image are basically the same; among them, the first image and the second image being basically the same may include that there are display differences that the human eye cannot distinguish between the first image and the second image, but this application does not make any limitations on this, and it depends on the specific situation.

[0064] Optionally, on the basis of the above embodiments, in an embodiment of the present application, in the second working mode, the control unit is used to control the deflection angles of the liquid crystal molecules in the display unit to increase proportionally, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data set to the second data set, thereby increasing the light transmittance of the liquid crystal molecules in the display unit, which is beneficial to reducing the light emission brightness of the backlight module of the display unit at the same display brightness, thereby being beneficial to reducing the power consumption of the backlight unit at the same display brightness, and further reducing the power consumption of the display device.

[0065] In another embodiment of the present application, in the second working mode, the control unit is used to control each liquid crystal molecule in the display unit to increase the deflection angle by a first angle, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data set to the second data set, thereby increasing the light transmittance of the liquid crystal molecules in the display unit, which is beneficial to reducing the light emission brightness of the backlight module of the display unit at the same display brightness, thereby being beneficial to reducing the power consumption of the backlight unit at the same display brightness, and further reducing the power consumption of the display device.

[0066] In other embodiments of the present application, the control unit may also adopt other methods to increase the angle of the liquid crystal molecules in the display unit, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data set to the second data set. This application does not make any limitations on this, and it depends on the specific situation.

[0067] Optionally, in an embodiment of the present application, the control unit is further configured to obtain the deflection angles of the liquid crystal molecules in each display pixel region of the display unit to obtain the first data set, and determine a second data set corresponding to the first data set based on the first data set. It should be noted that, in this embodiment, the control unit may obtain the second data set corresponding to the first data set by querying a database based on the first data set, or may calculate the second data set based on the same conditions satisfied by the first image and the second image and the first data set. The present application does not limit this, and it depends on the specific situation.

[0068] Based on any of the above embodiments, in an embodiment of the present application, in the second working mode, the control unit is further configured to respond to a third instruction, control the display unit to exit the second working mode, and output the control signal at a first frequency, so that the display unit outputs an image at a first refresh frequency. That is, in this embodiment, the display device can switch from the second working mode back to the first working mode by responding to an external instruction.

[0069] Based on the above embodiments, in an embodiment of the present application, the control unit also responds to a third instruction, controls the deflection angle data of the liquid crystal molecules in the display unit to switch from the second data set to the first data set. For the same liquid crystal molecule, the deflection angle in the second data set is greater than the deflection angle in the first data set; and generates a fourth instruction and sends it to the driving chip of the backlight module of the display unit, so that the driving chip responds to the fourth instruction and controls the driving current of the backlight module to increase from the second current to the first current.

[0070] Optionally, in an embodiment of the present application, the third instruction comes from an electronic device connected to the display device. In this embodiment, when the image data frame output by the electronic device enters the dynamic state, that is, when the electronic device switches from not outputting an image frame to outputting an image frame, the control unit will automatically exit the simulated virtual EDID timing and enter the normal working mode. The specific implementation method includes: when the identification bit 1B0 sent from the electronic device end is set to 0, that is, the electronic device exits the panel replay function, the control unit immediately determines that the identification bit 1B0 is 0, and at this time, it will immediately exit the virtual EDID mode.

[0071] Optionally, in an embodiment of the present application, the electronic device and the control unit communicate with each other through a digital video transmission protocol. It should be noted that the electronic device provided in the embodiments of the present application may support interfaces of multiple protocols, such as Display port, USB-C port, and TBT Goshenridge, and an interface that supports the DPCD protocol. The present application does not limit this, and it depends on the specific situation.

[0072] Optionally, in an embodiment of the present application, when the display unit is in the second working mode and the display unit needs to output a new image, the control unit responds to a third instruction, controls the display unit to exit the second working mode, and switches back to the first working mode, and outputs the control signal at a first frequency, so that the display unit outputs an image at a first refresh frequency.

[0073] It should be noted that when the display device repeatedly outputs the same frame of image, the display information of its display toolbar may change. For example, the time display information will change over time. At this time, the display device is still repeatedly outputting the same frame of image data and does not need to exit the second working mode.

[0074] Therefore, based on any of the above embodiments, in an embodiment of the present application, in the second working mode, the control unit is further configured to compare the third frame of image data and the fourth frame of image data received by it. The third frame of image data and the fourth frame of image data are two adjacent frames of image data. If the later received fourth frame of image data and the earlier received third frame of image data meet a preset condition, the control signal corresponding to the fourth frame of image data is output at a second frequency, so that the display unit outputs the fourth frame of image data at the second refresh frequency. Otherwise, the control unit controls the display unit to exit the second working mode and outputs the control signal corresponding to the fourth frame of image data at a first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency. That is, in this embodiment, the control unit automatically compares two adjacent frames of image data received by it. If the later received fourth frame of image data and the earlier received third frame of image data meet a preset condition, the current second working mode is maintained, and the control signal corresponding to the fourth frame of image data is output at a second frequency, so that the display unit outputs the fourth frame of image data at the second refresh frequency. Otherwise, the second working mode is exited, switched to the first working mode, and the control signal corresponding to the fourth frame of image data is output at a first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency.

[0075] Optionally, in an embodiment of the present application, the preset conditions include: the reception times of the third frame of image data and the fourth frame of image data are less than a first preset time; the number of regions with different display contents included in the display screens corresponding to the third frame of image data and the fourth frame of image data is less than a preset number, and the area of a single region with different display contents is less than a preset area; wherein, the first preset time is related to the second refresh frequency.

[0076] Based on the above embodiments, in an embodiment of the present application, in this embodiment, the reception times of the third frame of image data and the fourth frame of image data are less than a first preset time, and the number of regions with different display contents included in the display screens corresponding to the third frame of image data and the fourth frame of image data is less than a preset number, and the area of a single region with different display contents is less than a preset area, the control unit continues to output a control signal at the second frequency, so that the display unit outputs an image at the second refresh frequency; if the reception times of the third frame of image data and the fourth frame of image data are less than a first preset time, but the number of regions with different display contents included in the display screens corresponding to the third frame of image data and the fourth frame of image data is not less than a preset number, or the area of a single region with different display contents is not less than a preset area, the control unit continues to output a control signal at the first frequency, so that the display unit outputs an image at the first refresh frequency.

[0077] Optionally, in an embodiment of the present application, the second frequency is 24 Hz, the first preset time may be 250 milliseconds, the preset number may be 6, and the preset area may be the area of 5 * 6 display pixels, but the present application does not limit this, and it depends on the specific situation.

[0078] Based on any of the above embodiments, in an embodiment of the present application, the control unit is used to control the display unit to exit the second working mode, and output a control signal corresponding to the fourth frame of image data at the first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency, including: controlling the display unit to exit the second working mode, outputting a control signal corresponding to the third frame of image data at the second frequency in a first time period, so that the display unit outputs the third frame of image data at the second refresh frequency, and outputting a control signal corresponding to the fourth frame of image data at the first frequency in a second time period, so that the display unit outputs the fourth frame of image data at the first refresh frequency, wherein the second time period is after the first time period, to avoid the display unit from jamming when switching to output the third frame of image data and the fourth frame of image data.

[0079] Optionally, in an embodiment of the present application, the value range of the first time period is 10 milliseconds to 50 milliseconds, so as to delay the frame rate of the fourth frame of image data received by the control unit at the millisecond level to take effect, ensuring that the display screen of the display unit does not have a frame freezing phenomenon.

[0080] Based on any of the above embodiments, in an embodiment of the present application, when the control unit controls the display unit to switch from the second working mode to the first working mode, after controlling the display unit to exit the second working mode, the frequency of its output control signal can be directly switched from the second frequency to the first frequency, so that the refresh frequency of the image output by the display unit is directly switched from the second refresh frequency to the first refresh frequency, improving the speed of switching the refresh frequency of the image output by the display unit from the second refresh frequency to the first refresh frequency; in another embodiment of the present application, if the difference between the first refresh frequency and the second refresh frequency is too large, after the control unit controls the display unit to exit the second working mode, it can also gradually increase the frequency of its output control signal from the second frequency, so that the refresh frequency of the display unit gradually increases until it increases to the first refresh frequency, ensuring that the frame rate transition of the display unit is smooth. The present application does not limit this, and it depends on the specific situation.

[0081] Correspondingly, an embodiment of the present application further provides a display control method, which is applied to a display device. The display unit of the display device includes a first working mode and a second working mode, as Figure 4 shown. This display control method includes:

[0082] In the first working mode, output a control signal at the first frequency so that the display unit outputs an image at the first refresh frequency;

[0083] In the second working mode, output a control signal at the second frequency so that the display unit outputs the image at the second refresh frequency. The second refresh frequency is less than the first refresh frequency, and each image output based on the second refresh frequency satisfies the same conditions.

[0084] Optionally, in an embodiment of the present application, the second refresh frequency is the lowest refresh frequency at which the display unit can output an image, so as to minimize the power consumption of the display unit by reducing the refresh frequency of the image output by the display unit. However, the present application does not limit this. As long as the second refresh frequency is less than the first refresh frequency, the power consumption of the display unit can be reduced.

[0085] The display control method provided by the embodiments of the present application, when controlling the display unit to output an image, each image output based on the second refresh rate meets the same conditions, and the second refresh rate is less than the first refresh rate, so that when outputting a display screen that meets the same conditions, a smaller second refresh rate is used for output, reducing the power consumption of the display device, which is beneficial to the power consumption optimization of the display device.

[0086] Optionally, in an embodiment of the present application, the display control method further includes: when the display unit is in the first working mode, in response to the obtained first instruction, controlling the display unit to switch from the first working mode to the second working mode. That is, in this embodiment, the display control method realizes the switching from the first working mode to the second working mode by responding to an external trigger instruction.

[0087] Based on the above embodiments, in an embodiment of the present application, the first instruction comes from an electronic device connected to the display device. Optionally, the electronic device may be a graphics card, that is, the image data received by the display device comes from the image data output by the electronic device connected to it. In this embodiment, when the display control method controls the display unit to switch from the first working mode to the second working mode by responding to the obtained first instruction, the display device and the electronic device connected to the display device need to have the function of supporting the picture replay mode. It should be noted that the picture replay mode means that when the display device does not receive a new image data frame, it repeatedly outputs the last frame of image data it received.

[0088] In another embodiment of the present application, the display control method further includes: comparing the first frame of image data and the second frame of image data in the received image data, where the first frame of image data and the second frame of image data are two adjacent frames of image data. If the later-received second frame of image data and the earlier-received first frame of image data meet the same conditions, controlling the display unit to switch from the first working mode to the second working mode. That is, in this embodiment, the display control method automatically controls the display unit to realize the switching from the first working mode to the second working mode by comparing two adjacent frames of image data received by it when the two adjacent frames of image data meet the same conditions. In other embodiments of the present application, the display control method may also control the display unit to switch from the first working mode to the second working mode by other means, and the present application does not limit this, which depends on the specific situation.

[0089] Based on any of the above embodiments, in an embodiment of the present application, the display unit is a liquid crystal display unit. In this embodiment, in the second working mode, the display control method further includes: controlling the deflection angle of the liquid crystal molecules in the display unit to switch from the first data set to the second data set. For the same liquid crystal molecule, the deflection angle in the second data set is greater than that in the first data set. Thus, by increasing the deflection angle of the liquid crystal molecules in the display unit, the light transmittance of the display unit is increased, so as to increase the gray-scale gain value of each display pixel in the display unit, thereby facilitating the display of a higher-brightness picture using a lower-brightness backlight, which is beneficial to reducing the power consumption of the display device.

[0090] Based on the above embodiment, in an embodiment of the present application, the display device further includes a backlight unit. The backlight unit includes a driving chip and a backlight module. Optionally, in this embodiment, the display control method further includes: generating a second instruction and sending it to the driving chip of the backlight module of the display unit, so that the driving chip responds to the second instruction and controls the driving current of the backlight module to decrease from the first current to the second current, thereby reducing the power consumption of the backlight unit and further reducing the power consumption of the display device.

[0091] It should be noted that in the above embodiment, when the driving current of the backlight module is the first current and the deflection data of the liquid crystal molecules in the display unit is the first data set, the display unit displays the first image; when the driving current of the backlight module is the second current and the deflection data of the liquid crystal molecules in the display unit is the second data set, the display unit displays the second image; the first image and the second image meet the same conditions.

[0092] It should also be noted that in this embodiment, the first image and the second image meeting the same conditions may mean that the first image and the second image are exactly the same, or that the first image and the second image are basically the same; among them, the first image and the second image being basically the same may include that there are display differences that the human eye cannot distinguish between the first image and the second image, but the present application does not make any limitations on this, and it depends on the specific situation.

[0093] Optionally, based on the above embodiments, in an embodiment of the present application, in the second working mode, the display control method further includes: controlling the deflection angles of the liquid crystal molecules in the display unit to increase proportionally, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data group to the second data group, thereby increasing the light transmittance of the liquid crystal molecules in the display unit, which is beneficial to reducing the light emission brightness of the backlight module of the display unit at the same display brightness, and thus beneficial to reducing the power consumption of the backlight unit at the same display brightness, and further reducing the power consumption of the display device.

[0094] In another embodiment of the present application, in the second working mode, the display control method further includes: controlling the deflection angles of the liquid crystal molecules in the display unit to increase by a first angle, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data group to the second data group, thereby increasing the light transmittance of the liquid crystal molecules in the display unit, which is beneficial to reducing the light emission brightness of the backlight module of the display unit at the same display brightness, and thus beneficial to reducing the power consumption of the backlight unit at the same display brightness, and further reducing the power consumption of the display device.

[0095] In other embodiments of the present application, the display control method may also adopt other methods to increase the angles of the liquid crystal molecules in the display unit, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data group to the second data group. The present application does not limit this, and it depends on the specific situation.

[0096] Based on any of the above embodiments, in an embodiment of the present application, in the second working mode, the display control method further includes: responding to a third instruction, controlling the display unit to exit the second working mode, and outputting the control signal at a first frequency, so that the display unit outputs an image at a first refresh frequency. That is, in this embodiment, the display control method can switch back from the second working mode to the first working mode by responding to an external instruction. Optionally, in an embodiment of the present application, the third instruction comes from an electronic device connected to the display device.

[0097] Optionally, in an embodiment of the present application, when the display unit is in the second working mode and the display unit needs to output a new image, the display control method further includes: responding to a third instruction, controlling the display unit to exit the second working mode, switching back to the first working mode, and outputting the control signal at a first frequency, so that the display unit outputs an image at a first refresh frequency.

[0098] It should be noted that when the display device repeatedly outputs the same frame of image, the display information of its display toolbar may change. For example, the time display information changes over time. At this time, the display device is still repeatedly outputting the same frame of image data and does not need to exit the second working mode.

[0099] Therefore, based on any of the above embodiments, in an embodiment of the present application, in the second working mode, the display control method further includes: comparing the third frame of image data and the fourth frame of image data received by it. The third frame of image data and the fourth frame of image data are two adjacent frames of image data. If the later received fourth frame of image data and the earlier received third frame of image data meet the preset conditions, output the control signal corresponding to the fourth frame of image data at the second frequency, so that the display unit outputs the fourth frame of image data at the second refresh frequency. Otherwise, control the display unit to exit the second working mode and output the control signal corresponding to the fourth frame of image data at the first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency. That is, in this embodiment, the display control method automatically compares two adjacent frames of image data received by it. If the later received fourth frame of image data and the earlier received third frame of image data meet the preset conditions, maintain the current second working mode and output the control signal corresponding to the fourth frame of image data at the second frequency, so that the display unit outputs the fourth frame of image data at the second refresh frequency. Otherwise, exit the second working mode, switch to the first working mode, and output the control signal corresponding to the fourth frame of image data at the first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency.

[0100] Based on any of the above embodiments, in an embodiment of the present application, controlling the display unit to exit the second working mode and outputting the control signal corresponding to the fourth frame of image data at the first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency includes: controlling the display unit to exit the second working mode, outputting the control signal corresponding to the third frame of image data at the second frequency in the first time period, so that the display unit outputs the third frame of image data at the second refresh frequency, and outputting the control signal corresponding to the fourth frame of image data at the first frequency in the second time period, so that the display unit outputs the fourth frame of image data at the first refresh frequency, where the second time period is after the first time period, to avoid the display unit from jamming when switching to output the third frame of image data and the fourth frame of image data.

[0101] Optionally, in an embodiment of the present application, the value range of the first time period is 10 milliseconds to 50 milliseconds, so as to take effect the millisecond-level delay of the frame rate for the received fourth-frame image data, so as to ensure that the display screen of the display unit does not have a frame freezing phenomenon.

[0102] Based on any of the above embodiments, in an embodiment of the present application, when the display control method controls the display unit to switch from the second working mode to the first working mode, after controlling the display unit to exit the second working mode, the frequency of its output control signal can be directly switched from the second frequency to the first frequency, so that the refresh frequency of the image output by the display unit is directly switched from the second refresh frequency to the first refresh frequency, improving the switching speed of the refresh frequency of the image output by the display unit from the second refresh frequency to the first refresh frequency; in another embodiment of the present application, if the difference between the first refresh frequency and the second refresh frequency is too large, after controlling the display unit to exit the second working mode, the display control method can also gradually increase the frequency of its output control signal from the second frequency, so that the refresh frequency of the display unit gradually increases until it increases to the first refresh frequency, ensuring that the frame rate transition of the display unit is smooth. The present application does not limit this, and it depends on the specific situation.

[0103] Next, taking the execution subject of the display control method as the control unit, the display control method provided by the embodiments of the present application will be described in combination with a specific embodiment.

[0104] As Figure 5 shown, the display control method includes:

[0105] The DPCD FW (DisplayPort Configuration Data Firmware) in the control unit announces support for the FEC (Forward Error Correction) function;

[0106] The control unit performs panelreplay (picture replay) self-announcement to support this function, and sets the encoding bit 0B0 to 1;

[0107] Judge whether the electronic device enables the picture replay function, that is, whether its identification bit 1B0 is set to 1;

[0108] If the electronic device enables the picture replay function, the control unit simulates a virtual EDID timing (Extended Display Identification Data Timing);

[0109] The control unit outputs a control signal to reduce the refresh frequency of the image data output by the display unit, controls the display unit to output images at a second refresh frequency, reduces the power consumption of the display unit, and reduces the driving current of the backlight module, so that the driving chip of the backlight module outputs a smaller second current to the backlight module, reducing the power consumption of the backlight module;

[0110] The control unit continuously outputs a control signal and continuously detects the output signal of the electronic device.

[0111] As Figure 6 shown, the display control method includes:

[0112] The control unit continuously outputs a control signal and continuously detects the output signal of the electronic device;

[0113] Determine whether the signal output by the electronic device changes, such as whether the electronic device outputs an image frame or whether the output image changes;

[0114] If the signal output by the electronic device changes, the identifier 1B0 output by the electronic device is set to 1.

[0115] The control unit controls the display unit to exit the second working mode, including the control unit exiting the simulated virtual EDID timing;

[0116] In the first time period, control the display unit to output image data at a second refresh frequency to achieve the effect of frame rate delay, and avoid the phenomenon of stuttering when the display unit switches to output image data;

[0117] In the second time period, enter the normal working mode, and control the display unit to output image data at a first refresh frequency.

[0118] In summary, for the display device and the display control method provided by the embodiments of the present application, when controlling the display unit to output images, each image output based on the second refresh frequency meets the same conditions, and the second refresh frequency is less than the first refresh frequency. When outputting a display screen that meets the same conditions, a smaller second refresh frequency is used for output, reducing the power consumption of the display device, which is beneficial to the power consumption optimization of the display device.

[0119] In this specification, the various embodiments are described in a progressive, or parallel, or a combination of progressive and parallel manners. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the various embodiments, reference can be made to each other. For the methods disclosed in the embodiments, since they correspond to the devices disclosed in the embodiments, the description is relatively simple, and for the relevant parts, reference can be made to the description of the device part.

[0120] It should be noted that in the description of this application, it should be understood that the descriptions of the drawings and embodiments are illustrative rather than restrictive. It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such article or device.

[0121] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display device, comprising: a control unit capable of determining an output frequency of the image data based on the image data, and outputting a control signal corresponding to the image data at the output frequency, wherein the image data comes from an electronic device connected to the display device; a display unit capable of outputting an image corresponding to the image data in response to the control signal; Wherein, in the first working mode, the control unit outputs the control signal at a first frequency so that the display unit outputs an image at a first refresh frequency, In the second working mode, the control unit outputs the control signal at a second frequency so that the display unit outputs the image at a second refresh frequency, the second refresh frequency is less than the first refresh frequency, and each image output based on the second refresh frequency satisfies the same condition.

2. The display device according to claim 1, wherein in the first working mode, the control unit controls the display unit to switch from the first working mode to the second working mode in response to the obtained first instruction; Or, in the first working mode, the control unit compares the first frame image data and the second frame image data received from the image data, the first frame image data and the second frame image data are two adjacent frames of image data, if the second frame image data received later and the first frame image data received earlier meet the same conditions, the control unit controls the display unit to switch from the first working mode to the second working mode.

3. The display device according to claim 1, wherein in the second working mode, the control unit is further configured to: Controlling the deflection angle data of the liquid crystal molecules in the display unit to switch from a first data group to a second data group, wherein for the same liquid crystal molecule, the deflection angle in the second data group is greater than the deflection angle in the first data group; generating a second instruction and sending the second instruction to a driver chip of a backlight module of the display unit, so that the driver chip responds to the second instruction and controls the driving current of the backlight module to decrease from a first current to a second current; in, When the driving current of the backlight module is a first current and the deflection data of the liquid crystal molecules in the display unit is a first data group, the display unit displays a first image; When the driving current of the backlight module is a second current and the deflection data of the liquid crystal molecules of the display unit is a second data group, the display unit displays a second image; and the first image and the second image meet the same condition.

4. The display device according to claim 3, in the second working mode, the control unit is used to control the deflection angle of each liquid crystal molecule in the display unit to increase in proportion, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data group to the second data group; and / or, is used to control the deflection angle of each liquid crystal molecule in the display unit to increase by a first angle, so that the deflection angle data of the liquid crystal molecules in the display unit is switched from the first data group to the second data group.

5. The display device according to claim 1, wherein in the second working mode, the control unit is further configured to: Comparing the third frame image data and the fourth frame image data received, which are two adjacent frames of image data, if the fourth frame image data received later and the third frame image data received earlier meet the preset conditions, output the control signal corresponding to the fourth frame image data at the second frequency, so that the display unit outputs the fourth frame image data at the second refresh frequency; otherwise, control the display unit to exit the second working mode, output the control signal corresponding to the fourth frame image data at the first frequency, so that the display unit outputs the fourth frame image data at the first refresh frequency.

6. The display device according to claim 5, wherein the preset condition comprises: The receiving time of the third frame image data and the fourth frame image data is less than the first preset time; The number of regions with different display contents included in the display pictures corresponding to the third frame image data and the fourth frame image data is less than a preset number, and the area of ​​a single region with different display contents is less than a preset area; The first preset time is related to the second refresh frequency.

7. The display device according to claim 5, wherein the control unit is configured to control the display unit to exit the second working mode and output a control signal corresponding to the fourth frame of image data at a first frequency, so that the display unit outputs the fourth frame of image data at the first refresh frequency, comprising: After controlling the display unit to exit the second working mode, the control signal corresponding to the third frame image data is output at the second frequency in the first time period, so that the display unit outputs the third frame image data at the second refresh frequency, and the control signal corresponding to the fourth frame image data is output at the first frequency in the second time period, so that the display unit outputs the fourth frame image data at the first refresh frequency, and the second time period is located after the first time period.

8. A display control method, applied to a display device, wherein a display unit of the display device includes a first working mode and a second working mode; the display control method comprises: In a first working mode, outputting a control signal at a first frequency so that the display unit outputs an image at a first refresh frequency; In the second working mode, a control signal is output at a second frequency so that the display unit outputs the image at a second refresh frequency, the second refresh frequency is less than the first refresh frequency, and each image output based on the second refresh frequency satisfies the same condition.

9. The display control method according to claim 8, further comprising: When the display unit is in the second working mode, in response to the obtained first instruction, control the display unit to switch from the first working mode to the second working mode; or, When the display unit is in the second working mode, comparing the first frame of image data and the second frame of image data received by the display unit, the first frame of image data and the second frame of image data are two adjacent frames of image data, and if the second frame of image data received later and the first frame of image data received earlier meet the same condition, controlling the display unit to switch from the first working mode to the second working mode; or, When the display unit is in the second working mode, the third frame image data and the fourth frame image data received are compared, and the third frame image data and the fourth frame image data are two adjacent frames of image data. If the fourth frame image data received later and the third frame image data received earlier meet the preset conditions, the control signal corresponding to the fourth frame image data is output at the second frequency, so that the display unit outputs the fourth frame image data at the second refresh frequency; otherwise, the display unit is controlled to exit the second working mode, and the control signal corresponding to the fourth frame image data is output at the first frequency, so that the display unit outputs the fourth frame image data at the first refresh frequency.

10. The display control method according to claim 9, wherein the step of controlling the display unit to exit the second working mode and outputting a control signal corresponding to the fourth frame of image data at a first frequency so that the display unit outputs the fourth frame of image data at the first refresh frequency comprises: After controlling the display unit to exit the second working mode, the control signal corresponding to the third frame image data is output at the second frequency in the first time period, so that the display unit outputs the third frame image data at the second refresh frequency, and the control signal corresponding to the fourth frame image data is output at the first frequency in the second time period, so that the display unit outputs the fourth frame image data at the first refresh frequency, and the second time period is located after the first time period.

Images