Display control apparatus and method, and display device

Abstract

The present invention is applied to the technical field of display, and provides a display control apparatus and method, and a display device. The display control apparatus comprises: a first control circuit configured to: in response to detecting a display mode switching instruction for switching from a first display mode to a second display mode, control a display apparatus to enter a display transition time period, wherein at a first predetermined moment of the display transition time period, a first control signal is enabled to be at a valid level, and at a second predetermined moment of the display transition time period, a second control signal is enabled to be at an invalid level; and a display circuit configured to: in a display time period, in response to detecting that the second control signal is at the invalid level, on the basis of the first control signal, control the display apparatus to display in the second display mode, wherein the second control signal is used for controlling the display apparatus to display in the first display mode.

Description

Display control device, method and display equipment Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display control device, method, and display equipment. Background Art

[0002] With the development of information science and technology, display technology has also been developed. A display device can have multiple display modes. In different usage scenarios, the display device can display in a display mode corresponding to the usage scenario.

[0003] Summary of the Invention

[0004] In view of the above problems, the present disclosure provides a display control apparatus, method and display device.

[0005] A first aspect of the present disclosure provides a display control device, comprising:

[0006] a first control circuit configured to, in response to detecting a display mode switching instruction for switching from the first display mode to the second display mode, control the display device to enter a display transition period, set the first control signal to an active level at a first predetermined time in the display transition period, and set the second control signal to an inactive level at a second predetermined time in the display transition period; and

[0007] The display circuit is configured to control the display device to display in a second display mode according to the first control signal in response to detecting that the second control signal is at an invalid level during a display period;

[0008] The second control signal is used to control the display device to display in the first display mode.

[0009] A second aspect of the present disclosure provides a display device, including:

[0010] A display control device according to an embodiment of the present disclosure; and

[0011] The display module is configured to display in a second display mode according to a first control signal provided by the display control device.

[0012] A third aspect of the present disclosure provides a display control method, which is applied to a display control device according to an embodiment of the present disclosure. The display control method includes:

[0013] In response to detecting a display mode switching instruction for switching from the first display mode to the second display mode, the first control circuit controls the display device to enter a display transition period, makes the first control signal an active level at a first predetermined time in the display transition period, and makes the second control signal an inactive level at a second predetermined time in the display transition period; and

[0014] In the display phase, the display circuit controls the display device to display in the second display mode according to the first control signal in response to detecting that the second control signal is at an invalid level;

[0015] The second control signal is used to control the display device to display in the first display mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0017] FIG1A schematically shows a signal control diagram of a first display mode and a second display mode according to an example;

[0018] FIG1B schematically shows a signal timing diagram of switching from the first display mode to the second display mode according to this example;

[0019] FIG2A schematically shows a block diagram of a display control device according to an embodiment of the present disclosure;

[0020] FIG2B schematically shows a signal timing diagram of a display control device according to an embodiment of the present disclosure;

[0021] FIG3A schematically shows a signal timing diagram of switching from a first display mode to a second display mode according to an embodiment of the present disclosure;

[0022] FIG3B schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0023] FIG3C schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0024] FIG3D schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0025] FIG3E schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0026] FIG4A schematically shows a signal control diagram for a first display mode and a second display mode according to an embodiment of the present disclosure;

[0027] FIG4B schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0028] FIG4C schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0029] FIG4D schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0030] FIG4E schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0031] FIG4F schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0032] FIG5A schematically shows a signal timing diagram of a display control device according to another disclosed embodiment;

[0033] FIG5B schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0034] FIG5C schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0035] FIG5D schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0036] FIG5E schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure;

[0037] FIG6 schematically shows a block diagram of a display device according to an embodiment of the present disclosure; and

[0038] FIG7 schematically shows a flow chart of a display control method according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure. It should be noted that the shapes and sizes of the various components in the figures do not reflect the actual size and proportion, but only illustrate the contents of the embodiments of the present disclosure.

[0040] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise," "include," etc. used herein indicate the presence of the features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0041] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0042] When expressions such as "at least one of A, B and C, etc." are used, they should generally be interpreted in accordance with the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0043] The display device can display in a display mode corresponding to the usage scenario. For example, if the usage scenario is a power-saving scenario, the display mode can be a power-saving mode. If the usage scenario is normal use, the display mode can be a normal display mode. The display device in the embodiments of the present disclosure can be a device with a display panel, such as a mobile phone, a smart watch, or a notebook, and is not limited here.

[0044] Fig. 1A schematically shows a signal control diagram of a first display mode and a second display mode according to an example. Fig. 1B schematically shows a signal timing diagram of switching from the first display mode to the second display mode according to the example.

[0045] As shown in FIG1A , the first display mode and the second display mode may have different display frequencies. For example, the display frequency of the first display mode may be greater than the display frequency of the second display mode. In the first display mode, the second control signal is used to control the display panel to display in the first display mode, and the first control signal does not control the display panel. In the second display mode, the first control signal controls the display panel to display in the second display mode, and the second control signal does not control the display panel.

[0046] As shown in Figure 1B, in the time period P1, the display device is in the first display mode, the second control signal is at a high level, and the first control signal is in a high impedance state (i.e., Hiz). At moment p1, the display device switches from the first display mode to the second display mode, the first control signal is adjusted from the high impedance state to a high level, and the second control signal is adjusted from a high level to a high impedance state. In the time period P2, the display device is in the second display mode, the first control signal is at a high level, and the second control signal is in a high impedance state. Among them, the high level can be a valid level, and the high impedance state can be an invalid level. When the first control signal is adjusted to a valid level, the first control signal will be in an unstable state, which will cause the current flowing through the display device to be unstable, and the actual brightness value of the display device is positively correlated with the current of the display device. Therefore, when the first control signal is unstable, the actual brightness value of the display device will fluctuate, causing a flickering screen phenomenon.

[0047] In view of this, the present disclosure proposes a display control device that, when a display device detects a display mode switching instruction, can enter a display transition period. During the display transition period, the second control signal is in a stable state, and the first control signal transitions from an unstable state to a stable state during the display transition period. Since the first control signal is stabilized by adding the display transition period, and the display device is controlled to display according to the stable second control signal during the display transition period, and the display device is controlled to display according to the stable first control signal during the display period, the flickering phenomenon of the display device caused by the unstable first control signal directly controlling the display device to display when a display mode switching instruction is detected is avoided, thereby improving the display effect of the display device.

[0048] FIG2A schematically shows a block diagram of a display control device according to an embodiment of the present disclosure.

[0049] As shown in FIG. 2A , the display control device 200 may include a first control circuit 210 and a display circuit 220 .

[0050] The first control circuit 210 can be configured to control the display device to enter a display transition period in response to detecting a display mode switching instruction for switching from the first display mode to the second display mode, so that the first control signal is a valid level at a first predetermined moment in the display transition period, and so that the second control signal is an invalid level at a second predetermined moment in the display transition period.

[0051] The display circuit 220 may be configured to control the display device to display in the second display mode according to the first control signal in response to detecting that the second control signal is at an inactive level during the display period.

[0052] The second control signal is used to control the display device to display in the first display mode.

[0053] According to an embodiment of the present disclosure, the first display mode and the second display mode can be two modes with different display frequencies. For example, the display frequency of the first display mode can be 60Hz, and the display frequency of the second display mode can be 30Hz. Therefore, when it is necessary to reduce the display frequency, the first display mode can be switched to the second display mode, and the second display mode with the lower display frequency can be used for display.

[0054] The maximum actual brightness value of the first display mode and the maximum actual brightness value of the second display mode may be different. For example, the maximum actual brightness value of the first display mode may be 650 nits, and the maximum actual brightness value of the second display mode may be 150 nits. If it is necessary to lower the actual brightness value of the display device, the first display mode may be switched to the second display mode, and the display may be performed in the second display mode with a lower maximum actual brightness value. The actual brightness value may be the brightness value of the actual light emitted by the display device.

[0055] The display mode conversion instruction may be received via a Mobile Industry Processor Interface (MIPI) of the display device.

[0056] The display transition period may be a period for the first control signal to reach a stable state. The stable state may mean that when the display device is controlled to display according to the first control signal, flickering of the display screen of the display device can be avoided.

[0057] The first scheduled time for displaying the transition period may be a time before the second scheduled time for displaying the transition period. The first scheduled time for displaying the transition period and the second scheduled time for displaying the transition period may be any time between the start time and the end time of the display transition period. The first scheduled time for displaying the transition period may also be the start time of the display transition period, and the second scheduled time for displaying the transition period may also be the end time of the display transition period.

[0058] At a first predetermined time during the display transition period, the first control signal may be adjusted to an effective level. At a second predetermined time during the display transition period, the second control signal may be adjusted to an ineffective level.

[0059] The first control signal is in an unstable state during the display transition period, while the second control signal is at an effective level in a stable state. Therefore, the display device is controlled by the second control signal in the stable state to perform display during the display transition period.

[0060] The display period may be a period after the display transition period. For example, the display period may be after the second predetermined time of the display transition period. The first control signal may be in a stable state at the second predetermined time of the display transition period. Therefore, during the display period, the display device may be controlled to display in the second display mode based on the stable first control signal, thereby preventing flickering on the display screen of the display device.

[0061] When the active level is high, the inactive level may be high impedance or low. When the active level is low, the inactive level may be high impedance or high. For example, the active level of the first control signal may be high, and the inactive level may be low or high impedance. The active level of the second control signal may be high, and the inactive level may be high impedance or low.

[0062] The timing changes of the first control signal and the second control signal are described below with reference to FIG. 2B .

[0063] FIG2B schematically shows a signal timing diagram of the display control device according to an embodiment of the present disclosure.

[0064] As shown in FIG2B , at a first predetermined time t1 during the display transition period T1, the first control signal is set to an active level. At a second predetermined time t2 during the display transition period T1, the second control signal is set to an inactive level. During the display period T2, the second control signal is set to an inactive level, and the display device is controlled to display in the second display mode according to the first control signal.

[0065] When the display device detects a display mode switch instruction, it may enter a display transition period. During the display transition period, the second control signal is in a stable state, and the first control signal transitions from an unstable state to a stable state during the display transition period. By adding the display transition period, the first control signal is stabilized, and during the display transition period, the display device is controlled to display according to the stable second control signal, while during the display period, the display device is controlled to display according to the stable first control signal. This avoids flickering in the display device caused by the unstable first control signal directly controlling the display when a display mode switch instruction is detected, thereby improving the display quality of the display device.

[0066] The first control circuit 210 may include a timing control subcircuit and a brightness control subcircuit.

[0067] The timing control subcircuit can make the first control signal be at a valid level at a first predetermined time in the display transition period, and make the second control signal be at an invalid level at a second predetermined time in the display transition period.

[0068] The brightness control subcircuit may determine a first display brightness value corresponding to the second display mode according to a first actual brightness value corresponding to the second display mode during a display transition period.

[0069] Among them, the display circuit 220 controls the display device to display in the second display mode according to the first control signal by performing the following operations: under the control of the first control signal, the display brightness value of the display device is configured to the first display brightness value, so that the display device displays with the first actual brightness value.

[0070] The timing control sub-circuit can refer to the first control circuit and will not be described in detail here.

[0071] According to the display brightness value (DBV), the display device can be controlled to display at an actual brightness value corresponding to the display brightness value in the corresponding display mode. The relationship between the display brightness value and the actual brightness value can be determined by gamma tuning.

[0072] The first display brightness value may be a value used to control the display device to display at a first actual brightness value in the second display mode. To enable the display device to display at the first actual brightness value, gamma tuning may be used to determine a first display brightness value corresponding to the first actual brightness value. By configuring the display brightness value of the display device to the first display brightness value, the display device can display at the first actual brightness value.

[0073] To determine the first display brightness value corresponding to the second display mode based on the first actual brightness value corresponding to the second display mode by performing one of the following operations: the brightness control subcircuit may further determine, in response to detecting a display brightness value switching instruction, the first display brightness value corresponding to the second display mode from one of the first mapping relationship set and the second mapping relationship set based on the first actual brightness value corresponding to the second display mode.

[0074] The brightness control subcircuit may also determine a first display brightness value corresponding to the second display mode from the first mapping relationship set according to the first actual brightness value corresponding to the second display mode.

[0075] The first mapping relationship set includes at least one first mapping relationship, where the first mapping relationship represents a relationship between an actual brightness value and a displayed brightness value when a power management integrated circuit (PMIC) supplies power to the display device. The second mapping relationship set includes at least one second mapping relationship, where the second mapping relationship represents a relationship between an actual brightness value and a displayed brightness value when a display driver circuit (DDIC) supplies power to the display device.

[0076] The display brightness value switching instruction may be an instruction for switching the second actual brightness value corresponding to the first display mode to the first actual brightness value corresponding to the second display mode. The second actual brightness value may be an actual brightness value matching the second display mode.

[0077] The first mapping relationship set can be obtained by performing gamma tuning on the display device using a PMIC, while the second mapping relationship set can be obtained by performing gamma tuning on the display device using a DDIC. When the display device is powered by a DDIC, the voltage is low, and the maximum actual brightness value that the display device can display is lower than the maximum actual brightness value that the display device can display when powered by a PMIC. For example, the maximum actual brightness value in the first mapping relationship set may be 650 nits, while the maximum actual brightness value in the second mapping relationship set may be 150 nits.

[0078] The same display brightness value in the first mapping relationship set and the second mapping relationship set may correspond to different actual brightness values. For example, in the first mapping relationship set, a display brightness value of 255 may correspond to an actual brightness value of 650 nits, while in the second mapping relationship set, a display brightness value of 255 may correspond to an actual brightness value of 150 nits.

[0079] Different display brightness values ​​in the first mapping relationship set and the second mapping relationship set may correspond to the same actual brightness value. For example, in the first mapping relationship set, a display brightness value of 59 may correspond to an actual brightness value of 150 nit, while in the second mapping relationship set, a display brightness value of 255 may correspond to an actual brightness value of 150 nit.

[0080] When the first actual brightness value is different from the second actual brightness value, it is necessary to switch the second actual brightness value corresponding to the first display mode to the first actual brightness value corresponding to the second display mode through a display brightness value switching instruction.

[0081] When the first actual brightness value is the same as the second actual brightness value, it can be determined whether the actual brightness value of the first display mode and the actual brightness value of the second display mode are determined by the same mapping relationship set. When it is determined that the actual brightness value of the first display mode and the actual brightness value of the second display mode are determined by different mapping relationship sets, it is necessary to switch the second actual brightness value corresponding to the first display mode to the first actual brightness value corresponding to the second display mode through a display brightness value switching instruction. When it is determined that the actual brightness value of the first display mode and the actual brightness value of the second display mode are determined by the same mapping relationship set, that is, the display brightness value corresponding to the first actual brightness value and the display brightness value corresponding to the second actual brightness value are the same, there is no need to switch the display brightness value through a display brightness value switching instruction. Since the range of the actual brightness values ​​of the first mapping relationship set is greater than that of the second mapping relationship set, therefore, when it is determined that the actual brightness value of the first display mode and the actual brightness value of the second display mode are determined by the same mapping relationship set, the mapping relationship set is the first mapping relationship set.

[0082] A mapping relationship set matching the second display mode may be determined, a mapping relationship matching the first actual brightness value may be determined from the mapping relationship set matching the second display mode according to the first actual brightness value, and the first display brightness value may be determined according to the mapping relationship.

[0083] According to an embodiment of the present disclosure, the actual brightness values ​​of the first display mode and the second display mode may be determined by different mapping relationship sets.

[0084] For example, when the first display mode is a normal mode and the second display mode is an always on display (AOD) mode, the first control signal is a control signal provided by the DDIC, and the second control signal is a control signal provided by the PMIC. The actual brightness value of the first display mode can be determined according to the first mapping relationship set, and the actual brightness value of the second display mode can be determined according to the second mapping relationship set.

[0085] When the first display mode is the AOD mode and the second display mode is the normal mode, the first control signal is a control signal provided by the PMIC, and the second control signal is a control signal provided by the DDIC. The actual brightness value of the first display mode can be determined according to the second mapping relationship set, and the actual brightness value of the second display mode can be determined according to the first mapping relationship set.

[0086] The normal mode may be a display mode of the display device when it is in use, and the AOD mode may be a display mode of the display device when it is not in use. The display device in the AOD mode may only display some simple information such as a clock.

[0087] The actual brightness values ​​of the first display mode and the second display mode may be determined by the same mapping relationship set.

[0088] For example, when the first display mode is normal mode and the second display mode is AOD mode, the actual brightness values ​​of both normal mode and AOD mode can be determined based on the first mapping relationship set. However, since the first control signal of the AOD mode is provided by the DDIC, the voltage of the control signal that the DDIC can provide is lower than the voltage of the control signal that the PMIC can provide. Therefore, some actual brightness values ​​in the first mapping relationship set cannot be displayed in the AOD mode.

[0089] According to the embodiment of the present disclosure, since the voltage conversion efficiency of the DDIC is higher than that of the PMIC, the voltage conversion efficiency can be improved by using the control signal provided by the DDIC in the AOD mode.

[0090] The first control circuit 210 may further include a first control register and a second control register.

[0091] The first control register may be configured to store a first mapping relationship set.

[0092] The second control register may be configured to store a second mapping relationship set.

[0093] By storing the first mapping relationship set and the second mapping relationship set in different control registers, it is possible to control the display brightness value of the display device through independent control registers in different display modes of the display device. Compared with controlling the display device through one control register, it is more flexible for two control registers to control the display brightness value of the display device in different modes.

[0094] The first mapping relationship set and the second mapping relationship set may also be stored in the same control register. For example, the first control register may be configured to store the first mapping relationship set and the second mapping relationship set.

[0095] The display frequency corresponding to the second display mode is the first display frequency, and the first display frequency is determined according to a tearing effect (TE) signal.

[0096] The tearing effect signal can be a signal generated by the DDIC to prevent tearing during image refresh during image display. The frequency of the tearing signal can be different in different display modes. The display frequency corresponding to different display modes can be the same as the frequency of the tearing signal for that display mode. The first display frequency can be the same as the frequency of the tearing signal in the second display mode. The tearing effect signal can also be used as a reference signal to send instructions to the application processor.

[0097] According to an embodiment of the present disclosure, since the display device in the AOD mode may be in a non-use state, the display frequency of the AOD mode may be lower than that in the normal mode, thereby reducing the display power consumption in the AOD mode. For example, the display frequency of the normal mode may be 60 Hz, and the display frequency of the AOD mode may be 30 Hz. Taking this as an example, when the first display mode is the normal mode and the second display mode is the AOD mode, the display frequency corresponding to the second display mode is the first display frequency of 30 Hz. When the first display mode is the AOD mode and the second display mode is the normal mode, the display frequency corresponding to the second display mode is the first display frequency of 60 Hz.

[0098] In a case where the first display mode is the normal mode and the second display mode is the AOD mode, the display control device 200 may further include a second control circuit.

[0099] The second control circuit may be configured to generate a display mode switching instruction when the actual brightness value of the display device is a second actual brightness value corresponding to the first display mode.

[0100] The second actual brightness value is an actual brightness value that matches the AOD mode.

[0101] The display device may include a sensor capable of detecting ambient light. When the sensor of the display device detects that the ambient light has dimmed, the display device may reduce the actual brightness value of the display device. When the actual brightness value of the display device is a second actual brightness value corresponding to the normal mode, the display device may generate a display mode switching instruction for switching the display device from the normal mode to the AOD mode.

[0102] If the display device does not receive an operation request within a predetermined time period in normal mode, the actual brightness value of the display device may be reduced. The predetermined time period may be 10 seconds, 20 seconds, 30 seconds, etc. If the actual brightness value of the display device is a second actual brightness value corresponding to normal mode, a display mode switching instruction may be generated.

[0103] The display device may also generate a display mode switching instruction when receiving a user's switching request for switching from the normal mode to the AOD mode and adjusting the actual brightness value of the display device to a second actual brightness value corresponding to the normal mode.

[0104] When the actual brightness value of the display device is the second actual brightness value corresponding to the first display mode, the second actual brightness value is an actual brightness value that matches the AOD mode, that is, the first display mode can be switched to the AOD mode while the actual brightness value remains unchanged, thereby avoiding flickering of the screen of the display device.

[0105] The second actual brightness value can be used to determine whether the first display mode meets the conditions for switching to the second display mode. If the actual brightness value of the display device is determined to be the second actual brightness value corresponding to the first display mode, it is determined that the conditions for switching to the second display mode are met, and a display mode switching instruction can be generated.

[0106] When the first display mode is the normal mode and the second display mode is the AOD mode, the second control circuit can also be configured as: under the control of the third control signal, by adjusting the display brightness value of the display device from the third display brightness value corresponding to the first display mode to the second display brightness value corresponding to the first display mode according to the first mapping relationship set, so that the actual brightness value of the display device is adjusted from the third actual brightness value corresponding to the first display mode to the second actual brightness value corresponding to the first display mode.

[0107] The third control signal is a control signal provided by the PMIC. The third display brightness value corresponds to the third actual brightness value, and the second display brightness value corresponds to the second actual brightness value.

[0108] The third actual brightness value may be an actual brightness value of the display device in the first display mode before the display device receives a display mode switching instruction. The third actual brightness value may be greater than the second actual brightness value.

[0109] The third actual brightness value may be an actual brightness value that does not match the AOD mode. For example, the third actual brightness value may be greater than any actual brightness value in the AOD mode. Since the first actual brightness value and the second actual brightness value are both actual brightness values ​​that match the second display mode, and the third actual brightness value does not match the actual brightness value in the AOD mode, when the display device is at the third actual brightness value, the display device cannot switch from the normal mode to the AOD mode, and the actual brightness value of the display device needs to be adjusted from the third actual brightness value corresponding to the first display mode to the second actual brightness value corresponding to the first display mode.

[0110] In a case where the first display mode is the normal mode and the second display mode is the AOD mode, the third control signal may be the same signal as the first control signal.

[0111] When the first display mode is the normal mode and the second display mode is the AOD mode, under the control of the third control signal, according to the second actual brightness value, a first mapping relationship matching the second actual brightness value can be determined from the first mapping relationship set, and a second display brightness value corresponding to the second actual brightness value can be determined according to the first mapping relationship, thereby adjusting the display device from the third display brightness value corresponding to the first display mode to the second display brightness value corresponding to the first display mode.

[0112] In order to achieve the following by performing the following operations: adjusting the display brightness value of the display device from the third display brightness value corresponding to the first display mode to the second display brightness value corresponding to the first display mode according to the first mapping relationship set, so that the actual brightness value of the display device is adjusted from the third actual brightness value corresponding to the first display mode to the second actual brightness value corresponding to the first display mode, the second control circuit can also be configured to adjust the display brightness value of the display device step by step from the third display brightness value corresponding to the first display mode to the second display brightness value corresponding to the first display mode according to the first mapping relationship set, so that the actual brightness value of the display device is gradually adjusted from the third actual brightness value corresponding to the first display mode to the second actual brightness value corresponding to the first display mode.

[0113] At least one intermediate display brightness value can be determined based on the third display brightness value and the second display brightness value. Based on the third display brightness value, the second display brightness and the at least one intermediate display brightness value, the display device is adjusted from the third display brightness value to the at least one intermediate display brightness value, and then adjusted from the at least one intermediate display brightness value to the second display brightness value.

[0114] For example, a display brightness value interval can be determined based on the first display brightness value and the second display brightness value, and the display brightness value interval can be divided into 10 parts, 20 parts, etc., and at least one intermediate display brightness value corresponding to the first display mode can be determined based on the display brightness values ​​of the endpoints of the equally divided display brightness value sub-intervals. The display device can be adjusted from the third display brightness value to the first intermediate display brightness value, and then from the first intermediate display brightness value to the second intermediate display brightness value, and so on, until it is adjusted from the last intermediate display brightness value to the second display brightness value corresponding to the first display mode. For example, the third display brightness value corresponding to the first display mode can be 200, and the second display brightness value corresponding to the first display mode can be 100. A display brightness value range of 100 to 200 can be determined, and the display brightness value range can be divided into 10 equal parts. 110, 120, 130, 140...180, 190 are determined as intermediate display brightness values. The display device is adjusted from the third display brightness value of 200 corresponding to the first display mode to the intermediate display brightness value of 190, and from the intermediate display brightness value 190 to the intermediate display brightness value 180, and so on, until it is adjusted to the second display brightness value of 100 corresponding to the first display mode.

[0115] By gradually adjusting the display brightness value of the display device from the third display brightness value corresponding to the first display mode to the second display brightness value corresponding to the first display mode, the brightness of the display device can be slowly reduced when it is adjusted from the third actual brightness value to the second actual brightness value, thereby avoiding flickering of the display device when it is directly adjusted from the third actual brightness value to the second actual brightness value, thereby improving the display effect of the display device.

[0116] FIG3A schematically shows a signal timing diagram when the first display mode switches to the second display mode according to an embodiment of the present disclosure.

[0117] As shown in FIG. 3A , the display transition period T1 may be a first display transition sub-period.

[0118] In order to achieve the following operations, such that the first control signal is at a valid level at a first predetermined time in the display transition period and the second control signal is at a invalid level at a second predetermined time in the display transition period, the timing control subcircuit may be further configured to, at the first predetermined time in the first display transition sub-period, enable the first control signal to a valid level in response to a first vertical synchronization pulse vsync_1, and to disable the second control signal in response to a second vertical synchronization pulse vsync_2, at a second predetermined time in the first display transition sub-period. The first predetermined time in the first display transition sub-period may be the first predetermined time t1 of the display transition period T1, and the second predetermined time in the first display transition sub-period may be the second predetermined time t2 of the display transition period T1.

[0119] The first vertical synchronization pulse vsync_1 is the first pulse of the first vertical synchronization signal (VSYNC) in the first display transition sub-period. The second vertical synchronization pulse vsync_2 is a pulse in VSYNC that is separated from the first vertical synchronization pulse vsync_1 by one period of the first display frequency. The first display frequency is the display frequency corresponding to the second display mode. For example, the first display frequency may be 60 Hz.

[0120] The frequency of the first vertical synchronization signal is the same as the frequency of the first tearing effect signal corresponding to the second display mode. The first tearing effect signal is shifted forward by M frames relative to the first vertical synchronization signal, where M is greater than or equal to one-eighth and less than or equal to one-half. The frequency corresponding to each frame is the second display frequency corresponding to the first display mode.

[0121] FIG3B schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0122] As shown in Figure 3B , when the first display mode is normal mode and the second display mode is AOD mode, the first control signal is DDIC ELVDD and the second control signal is PMIC ELVDD. TE is shifted M frames ahead of VSYNC. The actual brightness value of the first display mode is determined by the first mapping relationship set stored in the first control register, while the actual brightness value of the second display mode is determined by the second mapping relationship set stored in the second control register.

[0123] In Figure 3B, the display mode switching instruction DMI_1 and the display brightness value switching instruction DB I_1 for switching the normal mode to the AOD mode are received through the MIPI of the display device. The display mode switching instruction DMI_1 can be, for example, 0x39, and the display brightness value switching instruction DBI_1 can be, for example, 69h. At the first predetermined moment of the first display transition sub-period, which can be the first predetermined moment t1 of the display transition period T1 in Figure 3B, the first vertical synchronization pulse vsync_1 is detected, triggering the display mode switching instruction DMI_1, and adjusting the second control signal from the invalid level to the valid level. In the first display transition sub-period, which can be the display transition period T1 in Figure 3B, the rising edge of TE is detected, and TE is adjusted from the second display frequency to the first display frequency. For example, TE is adjusted from 60Hz to 30Hz. At the second predetermined moment of the first display transition sub-period, which may be the second predetermined moment t2 of the display transition period T1 in FIG3B , the second vertical synchronization pulse vsync_2 is detected, triggering the display brightness value switching instruction DB I_1, adjusting the second control signal to an invalid level, and adjusting the emission start signal (Emission Start Vertical, ESTV) from one pulse per frame in the first display mode to four pulses per frame in the second display mode, adjusting the source from the second display brightness value corresponding to the second actual brightness value in the first display mode to the first display brightness value corresponding to the first actual brightness value in the first display mode, and adjusting the control signal (i.e., Swire) used to control the second control signal from a valid level to an invalid level.

[0124] FIG3C schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0125] As shown in FIG3C , unlike FIG3B , the first display mode in FIG3C is the AOD mode, the second display mode is the normal mode, the first control signal is PMIC ELVDD, and the second control signal is DDIC ELVDD. The actual brightness value of the first display mode is determined by the second mapping relationship set stored in the second control register, and the actual brightness value of the second display mode is determined by the first mapping relationship set stored in the first control register.

[0126] In Figure 3C, the display mode switching instruction DMI_2 and the display brightness value switching instruction DBI_2 for switching the AOD mode to the normal mode are received through the MIPI of the display device. The display mode switching instruction DMI_2 can be, for example, 0x38, and the display brightness value switching instruction DBI_2 can be, for example, 51h. At the first predetermined moment of the first display transition sub-period, which can be the first predetermined moment t1 of the display transition period T1 in Figure 3C, the first vertical synchronization pulse vsync_1 is detected, triggering DMI_2 to adjust the second control signal from the invalid level to the valid level. During the first display transition sub-period, which can be the display transition period T1 in Figure 3C, the rising edge of TE is detected, and TE is switched from the second display frequency to the first display frequency. At the second predetermined moment of the first display transition sub-period, which may be the second predetermined moment t2 of the display transition period T1 in FIG3C , the second vertical synchronization pulse vsync_2 is detected, DBI_2 is triggered, the first control signal is adjusted from a valid level to an invalid level, and ESTV is switched from four pulses per frame in the first display mode to one pulse per frame in the second display mode. The second display brightness value corresponding to the second actual brightness value in the first display mode is adjusted to the first display brightness value corresponding to the first actual brightness value in the first display mode, and Swire is adjusted from a valid level to an invalid level.

[0127] The mapping relationship sets corresponding to the normal mode and AOD mode in Figures 3B and 3C are stored in two control registers respectively. Therefore, the display brightness value switching instruction DBI_1 for switching from normal mode to AOD mode and the display brightness value switching instruction DBI_2 for switching from AOD mode to normal mode are for different control registers.

[0128] FIG3D schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0129] As shown in FIG. 3D , different from FIG. 3B , the actual brightness value of the first display mode and the actual brightness value of the second display mode in FIG. 3D are both determined by the first mapping relationship set.

[0130] Since the actual brightness values ​​of the first display mode and the second display mode are both determined by the first mapping relationship set, if the second actual brightness value corresponding to the first display mode is the same as the first actual brightness value corresponding to the second display mode, there is no need to display the brightness value switching instruction. Only the display mode switching instruction DMI_1 needs to be received via the MIPI of the display device. The changes of other signals in Figure 3D can be referred to Figure 3B and will not be repeated here.

[0131] FIG3E schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0132] As shown in FIG. 3E , different from FIG. 3C , the actual brightness value of the first display mode and the actual brightness value of the second display mode in FIG. 3E are both determined by the first mapping relationship set.

[0133] Since the actual brightness values ​​of the first display mode and the second display mode are both determined by the first mapping relationship set, if the second actual brightness value corresponding to the first display mode is the same as the first actual brightness value corresponding to the second display mode, there is no need to display the brightness value switching instruction, and only the display mode switching instruction DMI_2 is received via the MIPI of the display device. The changes in other signals in Figure 3E can be referred to Figure 3C and will not be repeated here.

[0134] In FIG. 3D and FIG. 3E , there is no need to display brightness value switching instructions, which reduces the execution of display brightness value switching instructions and improves the efficiency of display mode switching.

[0135] For ease of understanding, in Figures 3A to 3E , the start time of the display transition period is shown as the first predetermined time t1 of the display transition period T1, and the end time of the display transition period is shown as the second predetermined time t2 of the display transition period T1. However, this does not limit the present disclosure. The start time of the display transition period may also be a time before the first predetermined time t1 of the display transition period T1, and the end time of the display transition period may also be a time after the second predetermined time t2 of the display transition period T1.

[0136] FIG4A schematically shows a signal control diagram of a first display mode and a second display mode according to an embodiment of the present disclosure.

[0137] As shown in FIG4A , the display control device may further include an application processor control circuit. The application processor control circuit is connected to a control pin for controlling the first control signal and a control pin for controlling the second control signal. When the first display mode switches to the second display mode, a first auxiliary control signal (Application Swire, AP Swire) may be provided by the application processor control circuit. The AP Swire controls the second control signal to maintain an active level during the display transition period.

[0138] FIG4B schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0139] As shown in FIG4B , the display transition period T1 may include a first display transition sub-period T1_1 and a second display transition sub-period T1_2, wherein the second display transition sub-period T1_2 is a sub-period preceding the first display transition sub-period T1_1. The application processor control circuit may be configured to set the first auxiliary control signal to an active level at a third predetermined time in the second display transition sub-period T1_2, and to set the first auxiliary control signal to an inactive level at a second predetermined time in the first display transition sub-period.

[0140] The first auxiliary control signal may be used to control the second control signal to maintain an active level during the display transition period T1 .

[0141] The third predetermined time of the second display transition sub-period T1_2 may be the third predetermined time t3 of the display transition period T1. The third predetermined time t3 of the display transition period T1 may be a time before the first predetermined time of the display transition period.

[0142] 4C to 4F illustrate the specific operation of the timing control sub-circuit, so that the first control signal is at a valid level at a first predetermined time during the display transition period, and the second control signal is at an invalid level at a second predetermined time during the display transition period.

[0143] At a first predetermined moment of the first display transition sub-period, the first control signal is made to be at a valid level according to the third vertical synchronization pulse vsync_3, and at a second predetermined moment of the first display transition sub-period, the second control signal is made to be at an invalid level by making the first auxiliary control signal at an invalid level.

[0144] The third vertical synchronization pulse vsync_3 is the first pulse of the second vertical synchronization signal in the first display transition sub-period.

[0145] FIG4C schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0146] As shown in Figure 4C, when the first display mode is normal mode and the second display mode is AOD mode, the first control signal is DDIC ELVDD and the second control signal is PMIC ELVDD. The actual brightness value of the first display mode is determined by a first mapping relationship set, and the actual brightness value of the second display mode is determined by a second mapping relationship set. The first mapping relationship set and the second mapping relationship set can be stored in the same register, such as the first control register. The PMIC controlling the second control signal is controlled by the DDIC Swire.

[0147] In Figure 4C , at the third predetermined moment of the second display transition sub-period T1_2, which may be the third predetermined moment t3 of the display transition period T1 in Figure 4C , the display device receives a display mode switching instruction DMI_1 and a display brightness value switching instruction DBI_2 via its MIPI interface, causing the first auxiliary control signal to be adjusted from an inactive state to an active state. At the first predetermined moment of the first display transition sub-period T1_1, which may be the first predetermined moment t1 of the display transition period T1 in Figure 4C , a third vertical synchronization pulse vsync_3 is detected, triggering the display mode switching instruction DMI_1, adjusting the second control signal from an inactive level to an active level, and adjusting DDIC Swire from an active level to an inactive level. The second control signal is controlled by the first auxiliary control signal, and ESTV is adjusted from one pulse per frame in the first display mode to four pulses per frame in the second display mode. Source is adjusted from a second display brightness value corresponding to the second actual brightness value in the first display mode to a first display brightness value corresponding to the first actual brightness value in the first display mode. At the second predetermined time of the first display transition sub-period T1_1, which may be the second predetermined time t2 of the display transition period T1 in FIG. 4C , in response to detecting that the active level of the first auxiliary control signal has been maintained for one frame, the first auxiliary control signal is adjusted from the active level to the inactive level, so that the second control signal is adjusted from the active level to the inactive level. The frequency corresponding to each frame is the first display frequency corresponding to the second display mode.

[0148] FIG4D schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0149] As shown in Figure 4D, unlike Figure 4C, the first display mode in Figure 4D is AOD mode, the second display mode is normal mode, the first control signal is PMIC ELVDD, and the second control signal is DDIC ELVDD. The actual brightness value of the first display mode is determined by the second mapping relationship set, while the actual brightness value of the second display mode is determined by the first mapping relationship set. The PMIC controlling the first control signal is primarily controlled by the DDIC Swire.

[0150] In Figure 4D, at the third predetermined moment of the second display transition sub-period T1_2, which may be the third predetermined moment t3 of the display transition period T1 in Figure 4D, the display mode switching instruction DMI_2 and the display brightness value switching instruction DBI_2 are received through the MIPI of the display device, and the first auxiliary control signal is adjusted from the invalid state to the valid state, so that the first control signal is adjusted from the invalid level to the valid level. At the first predetermined moment of the first display transition sub-period T1_1, which may be the first predetermined moment t1 of the display transition period T1 in Figure 4D, the third vertical synchronization pulse vsync_3 is detected, triggering the display mode switching instruction DMI_2, adjusting the second control signal from the valid level to the invalid level, adjusting DDIC Swire from the invalid level to the valid level, and adjusting ESTV from one pulse per frame in the first display mode to four pulses per frame in the second display mode, and adjusting source from the second display brightness value corresponding to the second actual brightness value in the first display mode to the first display brightness value corresponding to the first actual brightness value in the first display mode. At the second predetermined time of the first display transition sub-period T1_1, which may be the second predetermined time t2 of the display transition period T1 in FIG. 4D , in response to detecting that the active level of the first auxiliary control signal has been maintained for one frame, the first auxiliary control signal is changed from the active level to the inactive level, and the first control signal is controlled by the DDIC Swire. The frequency corresponding to each frame is the second display frequency corresponding to the first display mode.

[0151] FIG4E schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0152] As shown in Figure 4E , unlike Figure 4C , the actual brightness values ​​of the first display mode and the actual brightness values ​​of the second display mode in Figure 4E are both determined by the first mapping relationship set. Since the actual brightness values ​​of the first display mode and the second display mode are both determined by the first mapping relationship set, if the second actual brightness value corresponding to the first display mode and the first actual brightness value corresponding to the second display mode are the same, there is no need to display the brightness value switching instruction, and only the display mode switching instruction DMI_1 needs to be received via the MIPI of the display device. The changes in other signals in Figure 4E can be referred to Figure 4C and will not be repeated here.

[0153] FIG4F schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0154] As shown in Figure 4F, unlike Figure 4D, the actual brightness value of the first display mode and the actual brightness value of the second display mode in Figure 4F are both determined by the first mapping relationship set. Since the actual brightness values ​​of the first display mode and the second display mode are both determined by the first mapping relationship set, if the second actual brightness value corresponding to the first display mode and the first actual brightness value corresponding to the second display mode are the same, there is no need to display the brightness value switching instruction, and only the display mode switching instruction DMI_2 is received via the MIPI of the display device. The changes in other signals in Figure 4F can be referred to Figure 4D and will not be repeated here.

[0155] In FIG. 4E and FIG. 4F , there is no need to display brightness value switching instructions, which reduces the execution of display brightness value switching instructions and improves the efficiency of display mode switching.

[0156] For ease of understanding, in Figures 4B to 4F, the start time of the display transition period is the third scheduled time t3 of the display transition period T1, the end time of the display transition period is the second scheduled time t2 of the display transition period T1, and the first scheduled time of the first display transition period is the first scheduled time of the display transition period. However, this does not limit the present disclosure. The start time of the display transition period may also be a time before the third scheduled time t3 of the display transition period T1, and the end time of the display transition period may also be a time after the second scheduled time t2 of the display transition period T1.

[0157] FIG5A schematically shows a signal timing diagram of a display control device according to another disclosed embodiment.

[0158] As shown in Figure 5A, the display transition period T1 may include a first display transition sub-period, the first predetermined moment of the first display transition sub-period may be the first predetermined moment t1 of the display transition period T1, and the second predetermined moment of the first display transition sub-period may be the second predetermined moment t3 of the display transition period T1. At the first predetermined moment of the first display transition sub-period, the first control signal is made to a valid level according to the fourth vertical synchronization pulse vsync_4, and at the second predetermined moment of the first display transition sub-period, the second control signal is made to an invalid level by making the second auxiliary control signal an invalid level.

[0159] The fourth vertical synchronization pulse vsync_4 is the first pulse of the third vertical synchronization signal in the first display transition sub-period.

[0160] The second auxiliary control signal is at an active level at other moments in the first display transition sub-period.

[0161] The specific operation of the timing control subcircuit is described below with reference to Figures 5B to 5E, so as to achieve that at a first predetermined moment in the first display transition sub-period, the first control signal is set to a valid level according to the fourth vertical synchronization pulse vsync_4, and at a second predetermined moment in the first display transition sub-period, the second control signal is set to an invalid level by setting the second auxiliary control signal to an invalid level.

[0162] The timing control subcircuit may be further configured to: according to the fourth vertical synchronization pulse vsync_4 , extend the effective duration of the second auxiliary control signal by a predetermined duration starting from the moment corresponding to the fourth vertical synchronization pulse vsync_4 .

[0163] The predetermined duration corresponds to the duration of the P frame, P is greater than or equal to one eighth and less than or equal to one half, and the frequency corresponding to each frame is the second display frequency corresponding to the first display mode.

[0164] FIG5B schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0165] As shown in Figure 5B, when the first display mode is the normal mode and the second display mode is the AOD mode, the first control signal is DDIC ELVDD and the second control signal is PMIC ELVDD. The actual brightness value of the first display mode and the actual brightness value of the second display mode are determined by the first mapping relationship set. The second control signal is mainly controlled by the second auxiliary control signal (i.e., Swire).

[0166] Since the actual brightness values ​​of the first display mode and the second display mode are both determined by the first mapping relationship set, if the second actual brightness value corresponding to the first display mode and the first actual brightness value corresponding to the second display mode are the same, a display brightness value switching instruction may not be required, and a display mode switching instruction DMI_1 may be received via the MIPI interface of the display device. At the first predetermined time of the first display sub-period, which may be the first predetermined time t1 of the display transition period T1 in FIG5B , the fourth vertical synchronization pulse vsync_4 is detected, triggering the display mode switching instruction DMI_1, adjusting the first control signal from an inactive level to an active level, extending the active duration of the second auxiliary control signal by a predetermined duration P frames from the time corresponding to the fourth vertical synchronization pulse vsync_4 via the control register, adjusting ESTV from one pulse per frame in the first display mode to four pulses per frame in the second display mode, adjusting source from the second display brightness value corresponding to the second actual brightness value in the first display mode to the first display brightness value corresponding to the first actual brightness value in the first display mode, and changing Swire from an active level to an inactive level. At the second predetermined time of the first display transition sub-period, which may be the second predetermined time t2 of the display transition period T1 in FIG. 5B , it is detected that the second auxiliary control signal has been extended by P frames from the first predetermined time t1, and the second auxiliary control signal is changed from an active level to an inactive level, causing the second control signal to change from an active level to an inactive level. The frequency corresponding to each frame is the first display frequency corresponding to the second display mode. For example, the first display frequency may be 60 Hz.

[0167] FIG5C schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0168] As shown in FIG. 5C , different from FIG. 5B , in FIG. 5C , the first display mode is the AOD mode, the second display mode is the normal mode, the first control signal is PMIC ELVDD, and the second control signal is DDIC ELVDD.

[0169] In FIG5C , a display mode switching instruction DMI_2 is received via the display device's MIPI interface. At a first predetermined moment in the first display sub-period, which may be the first predetermined moment t1 of the display transition period T1 in FIG5C , a fourth vertical synchronization pulse vsync_4 is detected, triggering the display mode switching instruction DMI_2. The control register extends the effective duration of the second auxiliary control signal by a predetermined duration P frames from the moment corresponding to the fourth vertical synchronization pulse vsync_4. ESTV is adjusted from four pulses per frame in the first display mode to one pulse per frame in the second display mode. Source is adjusted from a second display brightness value corresponding to the second actual brightness value in the first display mode to a first display brightness value corresponding to the first actual brightness value in the first display mode. At a second predetermined moment in the first display sub-period, which may be the second predetermined moment t2 of the display transition period T1 in FIG5C , an extension of the second auxiliary control signal by P frames from the first predetermined moment t1 is detected. The second auxiliary control signal is adjusted from an inactive level to an active level, thereby adjusting the second control signal from an active level to an inactive level. The frequency corresponding to each frame is the first display frequency corresponding to the first display mode. At the second predetermined time of the first display transition sub-period, which may be the second predetermined time t2 of the display transition period T1 in FIG. 5C , the next pulse of VSYNC after the fourth synchronous vertical pulse vsync_4 is detected, and the second control signal is adjusted from the valid level to the invalid level.

[0170] In FIG. 5B and FIG. 5C , there is no need to display brightness value switching instructions, which reduces the execution of display brightness value switching instructions and improves the efficiency of display mode switching.

[0171] FIG5D schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0172] As shown in FIG5D , compared with FIG5B , the actual brightness value of the first display mode in FIG5D is determined by the first mapping relationship set, and the actual brightness value of the second display mode is determined by the second mapping relationship set. The first mapping relationship set and the second mapping relationship set can be stored in the same control register, for example, the first control register.

[0173] Since the actual brightness values ​​of the first display mode and the second display mode are determined by different mapping relationship sets, when the second actual brightness value corresponding to the first display mode and the first actual brightness value corresponding to the second display mode are the same, a display brightness value switching instruction is required to switch the second display brightness value corresponding to the second actual brightness value to the first display brightness value corresponding to the first actual brightness value. The display mode switching instruction DMI_1 and the display brightness value switching instruction DBI_2 can be received via the MIPI of the display device. The changes of other signals in Figure 5D can refer to Figure 5B and are not repeated here.

[0174] FIG5E schematically shows a signal timing diagram of a display control device according to another embodiment of the present disclosure.

[0175] As shown in FIG5E , unlike FIG5C , the actual brightness value of the first display mode in FIG5E is determined by a first mapping relationship set, and the actual brightness value of the second display mode is determined by a second mapping relationship set. The first mapping relationship set and the second mapping relationship set can be stored in the same control register, for example, the first control register.

[0176] Since the actual brightness values ​​of the first display mode and the second display mode are determined by different mapping relationship sets, when the second actual brightness value corresponding to the first display mode and the first actual brightness value corresponding to the second display mode are the same, a display brightness value switching instruction is required to switch the second display brightness value corresponding to the second actual brightness value to the first display brightness value corresponding to the first actual brightness value. The display mode switching instruction DMI_2 and the display brightness value switching instruction DBI_2 can be received via the MIPI of the display device. The changes of other signals in Figure 5E can refer to Figure 5C and are not repeated here.

[0177] For ease of understanding, in Figures 5A to 5E , the start time of the display transition period is the first predetermined time t1 of the display transition period T1, and the end time of the display transition period is the second predetermined time t2 of the display transition period T1. However, this does not limit the present disclosure. The start time of the display transition period may also be a time before the first predetermined time t1 of the display transition period T1, and the end time of the display transition period may also be a time after the second predetermined time t2 of the display transition period T1.

[0178] FIG6 schematically shows a block diagram of a display device according to an embodiment of the present disclosure.

[0179] As shown in FIG. 6 , a display device 600 may include a display control apparatus 610 and a display module 620 according to an embodiment of the present disclosure.

[0180] The display module 620 may be configured to display in a second display mode according to a first control signal provided by the display control device.

[0181] According to an embodiment of the present disclosure, the display control device 610 may refer to the display control device 200 of the above embodiment, and will not be described in detail here.

[0182] FIG7 schematically shows a flow chart of a display control method according to an embodiment of the present disclosure.

[0183] As shown in FIG. 7 , the display control method is applied to the display control device according to an embodiment of the present disclosure, and the display control method includes operation S710 and operation S720 .

[0184] In operation S710, in response to detecting a display mode switching instruction for switching from a first display mode to a second display mode, the first control circuit controls the display device to enter a display transition period, and at a first predetermined moment in the display transition period, makes the first control signal a valid level, and at a second predetermined moment in the display transition period, makes the second control signal an invalid level.

[0185] For example, operation S710 may refer to the first control circuit 210 in the above embodiment, which will not be described in detail here.

[0186] In operation S720 , in a display phase, in response to detecting that the second control signal is at an inactive level, the display circuit controls the display device to display in the second display mode according to the first control signal.

[0187] The second control signal is used to control the display device to display in the first display mode.

[0188] For example, operation S720 may refer to the display circuit 220 of the above embodiment, which will not be described in detail here.

[0189] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the above-mentioned module, program segment, or a part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0190] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways, even if such combinations and / or couplings are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or couplings are intended to fall within the scope of this disclosure.

[0191] The embodiments of the present disclosure are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although each embodiment has been described separately above, this does not mean that the measures in each embodiment cannot be used in combination to advantage. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A display control device, comprising: A first control circuit is configured to, in response to detecting a display mode switching instruction for switching from a first display mode to a second display mode, control the display device to enter a display transition period, make the first control signal to be a valid level at a first predetermined time in the display transition period, and make the second control signal to be an invalid level at a second predetermined time in the display transition period; as well as A display circuit configured to control the display device to display in the second display mode according to the first control signal in response to detecting that the second control signal is at the invalid level during a display period; The second control signal is used to control the display device to display in the first display mode.

2. The device according to claim 1, wherein: The first control circuit comprises: a timing control subcircuit configured to make the first control signal the valid level at a first predetermined time in the display transition period, and make the second control signal the invalid level at a second predetermined time in the display transition period; and The brightness control subcircuit is configured to determine, during the display transition period, a first display brightness value corresponding to the second display mode according to a first actual brightness value corresponding to the second display mode; The display circuit controls the display device to display in the second display mode according to the first control signal by performing the following operations: Under the control of the first control signal, the display brightness value of the display device is configured to be the first display brightness value, so that the display device performs display at the first actual brightness value.

3. The device according to claim 2, wherein: The brightness control subcircuit determines the first display brightness value corresponding to the second display mode according to the first actual brightness value corresponding to the second display mode by performing one of the following operations: In response to detecting a display brightness value switching instruction, determining a first display brightness value corresponding to the second display mode from one of a first mapping relationship set and a second mapping relationship set according to a first actual brightness value corresponding to the second display mode; as well as Determining a first display brightness value corresponding to the second display mode from the first mapping relationship set according to the first actual brightness value corresponding to the second display mode; The first mapping relationship set includes at least one first mapping relationship, and the first mapping relationship represents the relationship between the actual brightness value and the display brightness value when the display device is powered by a power management integrated circuit PMIC; The second mapping relationship set includes at least one second mapping relationship, and the second mapping relationship represents the relationship between the actual brightness value and the display brightness value when the display panel driving circuit DDIC supplies power to the display device.

4. The device according to claim 3, wherein: The first control circuit further includes: A first control register configured to store the first mapping relationship set; and The second control register is configured to store the second mapping relationship set.

5. The device according to claim 1, wherein: The display frequency corresponding to the second display mode is the first display frequency, and the first display frequency is determined according to the tearing effect signal.

6. The device according to any one of claims 2 to 5, wherein: The display transition period includes a first display transition sub-period; The timing control subcircuit performs the following operations to make the first control signal the valid level at a first predetermined time in the display transition period, and to make the second control signal the invalid level at a second predetermined time in the display transition period: At a first predetermined time of the first display transition sub-period, the first control signal is set to the valid level according to a first vertical synchronization pulse, and at a second predetermined time of the first display transition sub-period, the second control signal is set to the invalid level according to a second vertical synchronization pulse; The first vertical synchronization pulse is the first pulse of the first vertical synchronization signal in the first display transition sub-period, the second vertical synchronization pulse is a pulse in the first vertical synchronization signal that is separated from the first vertical synchronization pulse by one cycle of the first display frequency, and the first display frequency is the display frequency corresponding to the second display mode.

7. The device according to claim 6, wherein: The frequency of the first vertical synchronization signal is the same as the frequency of the first tearing effect signal corresponding to the second display mode. The first tearing effect signal is shifted forward by M frames than the first vertical synchronization signal, M is greater than or equal to one-eighth and less than or equal to one-half, and the frequency corresponding to each frame is the second display frequency corresponding to the first display mode.

8. The device according to any one of claims 2 to 5, wherein: The display transition period includes a first display transition sub-period and a second display transition sub-period, wherein the second display transition sub-period is a sub-period before the first display transition sub-period; The device also includes: The application processor control circuit is configured to make the first auxiliary control signal be at the effective level at a third predetermined time of the second display transition sub-period, and make the first auxiliary control signal be at the ineffective level at a second predetermined time of the first display transition sub-period; The first auxiliary control signal is used to control the second control signal to maintain the effective level during the display transition period.

9. The device according to claim 8, wherein: The timing control subcircuit makes the first control signal the valid level at the first predetermined time of the display transition period, and makes the second control signal the invalid level at the second predetermined time of the display transition period by performing the following operations: At a first predetermined time of the first display transition sub-period, the first control signal is set to the valid level according to a third vertical synchronization pulse, and at a second predetermined time of the first display transition sub-period, the second control signal is set to the invalid level by setting the first auxiliary control signal to the invalid level; The third vertical synchronization pulse is the first pulse of the second vertical synchronization signal in the first display transition sub-period.

10. The device according to any one of claims 2 to 5, wherein: The display transition period includes a first display transition sub-period; The timing control subcircuit performs the following operations to make the first control signal the valid level at a first predetermined time in the display transition period, and to make the second control signal the invalid level at a second predetermined time in the display transition period: At a first predetermined time of the first display transition sub-period, according to a fourth vertical synchronization pulse, the first control signal is set to the valid level, and at a second predetermined time of the first display transition sub-period, the second control signal is set to the invalid level by setting the second auxiliary control signal to the invalid level; Wherein, the fourth vertical synchronization pulse is the first pulse of the third vertical synchronization signal in the first display transition sub-period; The second auxiliary control signal is at the effective level at other times of the first display transition sub-period.

11. The device according to claim 10, wherein: The timing control subcircuit is further configured as: According to the fourth vertical synchronization pulse, extending the effective duration of the second auxiliary control signal by a predetermined duration from the moment corresponding to the fourth vertical synchronization pulse; The predetermined duration corresponds to the duration of a P frame, P is greater than or equal to one eighth and less than or equal to one half, and the frequency corresponding to each frame is a second display frequency corresponding to the first display mode.

12. The device according to any one of claims 1 to 5, wherein: When the first display mode is a normal mode and the second display mode is an AOD mode, the first control signal is a control signal provided by a DDIC, and the second control signal is a control signal provided by a PMIC; When the first display mode is the AOD mode and the second display mode is the normal mode, the first control signal is a control signal provided by the PMIC, and the second control signal is a control signal provided by the DDIC.

13. The device according to claim 12, wherein: When the first display mode is the normal mode and the second display mode is the AOD mode, the device further includes: a second control circuit configured to generate the display mode switching instruction when the actual brightness value of the display device is a second actual brightness value corresponding to the first display mode; The second actual brightness value is an actual brightness value matching the second display mode.

14. The device according to claim 12, wherein: When the first display mode is the normal mode and the second display mode is the AOD mode, the second control circuit is further configured as: Under the control of a third control signal, by adjusting the display brightness value of the display device from a third display brightness value corresponding to the first display mode to a second display brightness value corresponding to the first display mode according to a first mapping relationship set, so that the actual brightness value of the display device is adjusted from the third actual brightness value corresponding to the first display mode to the second actual brightness value corresponding to the first display mode; Wherein, the third control signal is a control signal provided by the PMIC; The third display brightness value corresponds to the third actual brightness value, and the second display brightness value corresponds to the second actual brightness value.

15. The device according to claim 14, wherein: The second control circuit adjusts the display brightness value of the display device from a third display brightness value corresponding to the first display mode to a second display brightness value corresponding to the first display mode according to the first mapping relationship set by performing the following operations, so that the actual brightness value of the display device is adjusted from the third actual brightness value corresponding to the first display mode to the second actual brightness value corresponding to the first display mode: By gradually adjusting the display brightness value of the display device from a third display brightness value corresponding to the first display mode to a second display brightness value corresponding to the first display mode according to the first mapping relationship set, the actual brightness value of the display device is gradually adjusted from the third actual brightness value corresponding to the first display mode to the second actual brightness value corresponding to the first display mode.

16. A display device comprising: The display control device according to any one of claims 1 to 15; as well as The display module is configured to display in a second display mode according to a first control signal provided by the display control device.

17. A display control method, applied to the display control device according to any one of claims 1 to 15, the method comprising: In response to detecting a display mode switching instruction for switching from a first display mode to a second display mode, the first control circuit controls the display device to enter a display transition period, and at a first predetermined time in the display transition period, the first control signal is at a valid level, and at a second predetermined time in the display transition period, the second control signal is at an invalid level; as well as In the display stage, the display circuit controls the display device to display in the second display mode according to the first control signal in response to detecting that the second control signal is the invalid level; The second control signal is used to control the display device to display in the first display mode.

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