Display module, electronic device, and display method

Abstract

Provided in the present application are a display module, an electronic device, and a display method. The display method comprises: when a display screen is in a first display state, a display drive chip sending a first switching instruction to the display screen, wherein the first switching instruction is used for instructing the display screen to switch the first display state to a second display state, the first display state being performing display in a first display area, and the second display state being performing display in a second display area; the display drive chip sending a first image frame to the display screen, wherein the first image frame is an image frame displayed in the second display state; and on the basis of the first switching instruction, switching the first display state of the display screen to the second display state, and displaying the first image frame in the second display area. By means of the solution, a display screen can perform switching to a second display state on the basis of a first switching instruction sent by a display drive chip, such that online switching between different display states of the display screen is completed, and the display screen can acquire in a timely manner an image displayed in a display state reached after switching, thereby ensuring a display effect during display state switching.

Description

A display module, an electronic device, and a display method

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410937390.9, filed on July 11, 2024, entitled “A display module, electronic device and display method”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of terminal technology, and in particular to a display module, electronic device and display method. Background Technology

[0004] With the development of terminal technology, the screen form of electronic devices is no longer singular. For example, foldable screen phones can provide screens of different sizes and shapes by changing the folding state. When an electronic device has multiple display states, since the display areas on the screen corresponding to different display states are different, the electronic device needs to switch to the corresponding display area when the display state is switched. Summary of the Invention

[0005] This application provides a display module, an electronic device, and a display method to ensure the display effect during the online switching process of different display states when the display screen of an electronic device supports multiple display states.

[0006] In a first aspect, this application provides a display module, the display module including a display driver chip and a display screen, the display screen including a first display area and a second display area; the display screen is configured to, when the display screen is in a first display state, receive a first switching instruction sent by the display driver chip, the first switching instruction being used to instruct the display screen to switch from the first display state to a second display state, the first display state being display in a first display area and the second display state being display in a second display area; receive a first image frame sent by the display driver chip, and switch from the first display state to the second display state according to the first switching instruction, the first image frame being an image frame displayed in the second display state; display the first image frame in the second display area; the display driver chip is configured to send the first switching instruction to the display screen and send the first image frame to the display screen.

[0007] Based on the display module provided in this application, after the user triggers the display screen of the electronic device to switch display states, the display driver chip sends a first switching command to the display screen to instruct the display screen to switch display states. The display screen can switch to the second display state according to the first switching command, thereby completing the online switching of different display states of the display screen and ensuring that the display screen can obtain the image displayed in the switched display state in a timely manner, thus ensuring the display effect during the display state switching process.

[0008] In one possible implementation, the first image frame sent by the display driver module to the display screen is an image frame corresponding to the size of the second display area. When the second display area is a part of the display screen, the first image frame is a local image corresponding to the display screen of the electronic device, which ensures the display effect while saving image processing power consumption.

[0009] In one possible implementation, the display driver chip is further configured to send a first screen-off command to the display screen before sending the first switching command to the display screen; the display screen is further configured to receive the first screen-off command sent by the display driver chip, and control the screen-off area corresponding to the second display state to enter the screen-off state according to the first screen-off command. Through this implementation, the display driver chip can instruct the display screen to control the screen-off area corresponding to the second display state to enter the screen-off state, ensuring that the display screen can display in the correct display area after switching display states.

[0010] In one possible implementation, the display driver chip is further configured to send a first screen-on command to the display screen after sending the first image frame to the display screen; the display screen is further configured to receive the first screen-on command sent by the display driver chip before displaying the first image frame in the second display area, and control the second display area to enter the screen-on state according to the first screen-on command. Through this implementation, the display driver chip sends the first image frame to the display screen and then instructs the display screen to control the second display area to enter the screen-on state, thereby preventing the abnormal display problem of flashback of the image displayed when the second display area was last lit due to residual image signals in the capacitor used to store image signals in the circuit corresponding to the second display area discharging when switching to the second display area; and this solution can also prevent abnormal display problems such as screen distortion or flashback of the image displayed before the screen was last turned off when the storage space of the image memory corresponding to the second display area contains random values ​​or the image frame displayed when the second display area was last lit, and the second display area is triggered to light up before the first image frame is stored in the storage space of the image memory corresponding to the second display area.

[0011] In one possible implementation, when the second display area includes the first display area, the first display area remains on when the display screen switches from the first display state to the second display state; or, when the first display area includes the second display area, the second display area remains on when the display screen switches from the first display state to the second display state. With this implementation, when the first and second display areas before and after the switch include overlapping areas, the overlapping areas remain on, thereby providing a smooth display transition effect.

[0012] In one possible implementation, the display screen is further configured to receive a first reset instruction sent by the display driver chip before receiving the first switching instruction sent by the display driver chip. The first reset instruction is configured to instruct the first capacitor used for storing image signals in the circuit of the display area other than the first display area in the second display area to be reset; the first capacitor is reset according to the first reset instruction; the display driver chip is further configured to send the first reset instruction to the display screen. With this implementation, when the display screen switches between different display states, the display driver chip can instruct the display screen in advance to reset the capacitor storing image signals in the circuit of the display area corresponding to the switched display state, thereby preventing the abnormal display problem of flashback to the image displayed when the second display area was last lit due to capacitor discharge when the circuit of the display area is turned on during screen switching.

[0013] In one possible implementation, the first display area and the second display area are non-overlapping display areas. The display screen is further configured to: receive a second image frame sent by the display driver chip before receiving a first switching instruction sent by the display driver chip, wherein the second image frame is the last image frame displayed in the first display state and the second image frame is a black image; display the second image frame in the first display area; and the display driver chip is further configured to: send the second image frame to the display screen before sending the first switching instruction to the display screen.

[0014] In one possible implementation, the first display area includes a second display area and a first sub-area; the display screen is further configured to: receive a second image frame sent by the display driver chip before receiving a first switching instruction sent by the display driver chip, the second image frame being the last image frame displayed in the first display state, and the image corresponding to the first sub-area in the second image frame being a black image; the display driver chip is further configured to: send the second image frame to the display screen before sending the first switching instruction to the display screen. With this design, when the display screen switches its display state again to display in the first display area, even if the first display area switches from a screen-off state to a screen-on state and the CST discharges when the circuit is turned on, the first display area will still flash a black image frame, without exhibiting the abnormal display problem of flashing back to the image displayed when the second display area was on last time.

[0015] Secondly, this application provides an electronic device, which includes a system-on-a-chip and the display module described in the first aspect;

[0016] The system-on-a-chip (SoC) is configured to, in response to a first user operation, send a first switching instruction to the display driver chip, wherein the first switching instruction instructs the display driver chip to control the display screen to switch from the first display state to the second display state; and is also configured to send the first image frame to the display driver chip; the display driver chip is configured to receive the first switching instruction sent by the SoC and receive the first image frame sent by the SoC.

[0017] Based on the electronic device provided in this application, the system-on-a-chip responds to the user's operation by instructing the display driver chip to control the display screen to switch display states, and sends the image frame displayed in the second display state to the display driver chip, thereby completing the online switching of different display states of the display screen.

[0018] In one possible implementation, the system-on-a-chip (SoC) is further configured to stop sending image frames displayed in the first display state to the display driver chip, and send a first buffer area switching instruction to the display driver chip. The first buffer area switching instruction instructs the display driver chip to set the image display area to the second display area. The display driver chip is further configured to receive the first buffer area switching instruction sent by the SoC and switch the image display area to the second display area according to the first buffer area switching instruction. Through this implementation, when switching display states, the electronic device can, according to a set timing sequence, stop sending image frames corresponding to the previous display state and instruct the display driver chip to switch the image display area, thereby timely switching the image display area and ensuring that the image can be displayed in the correct display area after switching display states, thus guaranteeing the display effect.

[0019] In one possible implementation, the system-on-a-chip (SoC) is further configured to send a first light-emitting enable signal shutdown instruction to the display driver chip. This first light-emitting enable signal shutdown instruction instructs the display driver chip to shut down the light-emitting enable signal corresponding to the screen-off area in the second display state. The display driver chip is further configured to: receive the first light-emitting enable signal shutdown instruction sent by the SoC; and generate a first screen-off instruction based on the first light-emitting enable signal shutdown instruction. This first screen-off instruction instructs the display screen to adjust the screen-off area corresponding to the second display state to a screen-off state. Through this implementation, the SoC can send the first light-emitting enable signal shutdown instruction to the display driver chip before sending the first buffer area switching instruction. The display driver chip then instructs the display screen to adjust the screen-off area in the second display state to a screen-off state based on the first light-emitting enable signal shutdown instruction, ensuring that the electronic device can display in the correct display area after switching display states.

[0020] In one possible implementation, the system-on-chip is further configured to send a second light-emitting enable signal turn-on instruction to the display driver chip, the second light-emitting enable signal turn-on instruction being used to instruct the display driver chip to turn on the light-emitting enable signal corresponding to the second display area; the display driver chip is further configured to: receive the second light-emitting enable signal turn-on instruction sent by the system-on-chip, and generate a first screen-on instruction according to the second light-emitting enable signal turn-on instruction, the first screen-on instruction being used to instruct the display screen to adjust the second display area to a screen-on state. In this implementation, after the system-on-a-chip (SoC) sends the first image frame to the display driver chip for a preset duration, the first image frame sent by the SoC to the display driver chip has been stored in the storage space corresponding to the second display area. The image signal corresponding to the first image frame will cover the residual signal in the capacitor of the circuit in the second display area. At this time, the display driver chip then turns on the light-emitting enable signal corresponding to the second display area according to the second light-emitting enable signal instruction, instructing the display screen to control the second display area to enter the on-screen state, so as to display the first image frame in the second display area. This prevents the abnormal display problem caused by the capacitor discharging when switching to the second display area due to residual image signals in the capacitor used to store image signals in the circuit corresponding to the second display area, resulting in a flashback of the image displayed when the second display area was on last time. Furthermore, this solution can also prevent abnormal display problems such as screen distortion or flashback of the image displayed before the screen went out when the second display area is on last time, caused by the second display area being on before the first image frame is stored in the storage space corresponding to the second display area and the second display area is on.

[0021] In one possible implementation, the system-on-a-chip (SoC) is further configured to: send a second reset instruction to the display driver chip, the second reset instruction being used to instruct the first capacitor used for storing image signals in the circuit of the display area other than the first display area in the second display area to be reset; the display driver chip is further configured to: receive the second reset instruction sent by the SoC, and generate a first reset instruction based on the second reset instruction, the first reset instruction being used to instruct the display screen to reset the first capacitor. Through this implementation, when the electronic device switches between different display states, the capacitor storing display data in the circuit of the display area corresponding to the switched display state can be reset in advance, thereby preventing the abnormal display problem of flashback to the image displayed when the second display area was last lit due to capacitor discharge when the circuit of the display area is turned on during screen switching.

[0022] In one possible implementation, the first display area and the second display area are non-overlapping display areas; the system-on-a-chip is further configured to: send a second image frame to the display driver chip, the second image frame being the last image frame displayed in the first display state, and the second image frame being a black image; the display driver chip is further configured to: receive the second image frame sent by the system-on-a-chip.

[0023] In one possible implementation, the first display area includes a second display area and a first sub-area; the system-on-a-chip is further configured to: send a second image frame to the display driver chip, the second image frame being the last image frame displayed in the first display state, and the image corresponding to the first sub-area in the second image frame being a black image; the display driver chip is further configured to: receive the second image frame sent by the system-on-a-chip.

[0024] Thirdly, this application provides a display module, which includes a display driver chip and a display screen. The display screen is in a first state of being off-screen. In response to a second operation by a user, the second operation is used to wake up the display screen, power on the display screen, and turn off the light-emitting enable signal of the off-screen area corresponding to the first state; control the display area corresponding to the first state to enter a screen-on state, and display a third image frame sent by the display driver chip in the display area corresponding to the first state; the display driver chip is used to send the third image frame to the display screen.

[0025] Based on the display module provided in this application, during the power-on process, when the user wakes up the display, the display can turn off the light-emitting enable signal of the screen-off area corresponding to the first state of the user's wake-up, and control the display area corresponding to the first state to enter the screen-on state, so that the display can correctly display the image in the state of the user's wake-up.

[0026] In one possible implementation, the display screen includes a first area and a second area. The first state includes a first state, a second state, or a third state. The first state involves displaying in the first area, the second state involves displaying in the second area, and the third state involves displaying across the entire area of ​​the display screen. Through this implementation, the display screen of the electronic device in this application can have first, second, and third display states. The display area and size differ in each display state, thus providing users with a variety of display experiences. The display method provided in this application enables the correct display of images when the user wakes up the display screen in different display states, ensuring the display effect during power-on.

[0027] In one possible implementation, the display driver chip is further configured to send a black image frame to the display screen before sending the third image frame; the display screen is further configured to receive the black image frame sent by the display driver chip and display the black image frame in the display area corresponding to the first state. With this implementation, during power-on, the display driver module can send a black image frame to the display screen before sending the third image frame, thereby preventing abnormal display problems caused by residual image data in the image memory being refreshed to the display screen during the initial power-on phase.

[0028] Fourthly, this application provides an electronic device, which includes a system-on-a-chip and a display module as described in the third aspect;

[0029] The system-on-a-chip is used to send the third image frame to the display driver chip, the third image frame being an image frame displayed on the display screen in the display area corresponding to the first state; the display driver chip is used to receive the third image frame sent by the system-on-a-chip.

[0030] Fifthly, this application provides a display module, the display module including a display driver chip and a display screen; the display screen is in a screen-off state of the first state, responding to a second operation by a user, the second operation being used to wake up the display screen; the display screen is powered on in a default display state, and a second switching instruction sent by the display driver chip is received, the second switching instruction being used to instruct the display screen to switch from the default display state to the first state; the display screen switches from the default display state to the first state according to the second switching instruction; a third image frame sent by the display driver chip is displayed in the display area corresponding to the first state; the default display state includes a full-screen display state;

[0031] The display driver chip is used to send the second switching command to the display screen and also to send the third image frame to the display screen.

[0032] Based on the display module provided in this application, during the power-on process, when the display screen is powered on in the default display state, the default display state of the electronic device may be different from the display state corresponding to the folded state when the user triggers the power-on of the electronic device. The display driver chip can instruct the display screen to switch from the default display state to the first state, so that the display screen can display in the display state when the user wakes up.

[0033] In one possible implementation, the display screen includes a first area and a second area. The first state includes a first state, a second state, or a third state. The first state involves displaying in the first area, the second state involves displaying in the second area, and the third state involves displaying across the entire area of ​​the display screen. Through this implementation, the display screen of the electronic device in this application can have first, second, and third display states. The display area and size differ in each display state, thus providing users with a variety of display experiences. The display method provided in this application enables the display screen to switch from its default display state to the user-activated display state when the user wakes it up in different display states, thereby ensuring the display effect during power-on.

[0034] In one possible implementation, the display driver chip is further configured to send a second screen-off command to the display screen after sending the second switching command to the display screen; the display screen is further configured to receive the second screen-off command sent by the display driver chip, and control the screen-off area corresponding to the first state to enter the screen-off state according to the second screen-off command.

[0035] In one possible implementation, the display driver chip is further configured to send a second screen-on command to the display screen before sending the third image frame to the display screen; the display screen is further configured to receive the second screen-on command sent by the display driver chip, and control the display area corresponding to the first state to enter the screen-on state according to the second screen-on command.

[0036] In one possible implementation, the display driver chip is further configured to send a black image frame to the display screen before sending the third image frame; the display screen is further configured to receive the black image frame sent by the display driver chip and display the black image frame in the display area corresponding to the first state. With this implementation, during power-on, after the display driver module sends the third image frame to the display screen, it can send a black image frame to the display screen, thereby preventing abnormal display problems caused by residual image data in the image memory being refreshed to the display screen during the initial power-on process.

[0037] In a sixth aspect, this application provides an electronic device, the electronic device including a system-on-a-chip (SoC) and a display module as described in the fifth aspect; the SoC is configured to, in response to the second operation of the user, send a second switching instruction to the display driver chip, the second display area switching instruction being used to instruct the display driver chip to control the display screen to switch from the default display state to the first state; and is further configured to send the third image frame to the display driver chip; the display driver chip is configured to receive the second switching instruction sent by the SoC and receive the third image frame sent by the SoC.

[0038] Based on the electronic device provided in this application, the default display state of the electronic device may be different from the display state corresponding to the folded state when the user triggers the electronic device to power on. In this case, during the power-on process, the system-on-a-chip can send a second switching instruction to the display driver chip so that the display driver chip instructs the display screen to display in the display state corresponding to the folded state when the user triggers the electronic device to power on, thereby ensuring that the electronic device can power on correctly and display images, and reducing the power-on delay and improving power-on efficiency.

[0039] Seventhly, this application provides a display method, which can be executed by a display device including a display driver chip and a display screen. The method includes: when the display screen is in a first display state, the display driver chip sends a first switching instruction to the display screen, the first switching instruction instructing the display screen to switch from the first display state to a second display state, the first display state being for displaying in a first display area and the second display state being for displaying in a second display area; the display driver chip sends a first image frame to the display screen, the first image frame being an image frame displayed in the second display state; the display screen switches from the first display state to the second display state according to the first switching instruction, and displays the first image frame in the second display area.

[0040] In one possible implementation, before the display driver chip sends the first switching instruction to the display screen, the method further includes: the display driver chip sending a first screen-off instruction to the display screen; and the display screen controlling the screen-off area corresponding to the second display state to enter the screen-off state according to the first screen-off instruction.

[0041] In one possible implementation, after the display driver chip sends the first image frame to the display screen, the method further includes: the display driver chip sending a first screen-on command to the display screen; and the display screen controlling the second display area to enter a screen-on state according to the first screen-on command.

[0042] In one possible implementation, when the second display area includes the first display area, the first display area remains on when the display screen switches from the first display state to the second display state; or, when the first display area includes the second display area, the second display area remains on when the display screen switches from the first display state to the second display state.

[0043] In one possible implementation, before the display driver chip sends a first switching instruction to the display screen, the method further includes: the display driver chip sending a first reset instruction to the display screen, the first reset instruction being used to instruct a first capacitor used for storing image signals in the circuit of the display area other than the first display area in the second display area to be reset; the display screen resetting the first capacitor according to the first reset instruction.

[0044] In one possible implementation, the first display area and the second display area are non-overlapping display areas; before the display driver chip sends a first switching instruction to the display screen, the method further includes: the display driver chip sending a second image frame to the display screen; the second image frame is the last image frame displayed in the first display state, and the second image frame is a black image; the display screen displays the second image frame in the first display area.

[0045] In one possible implementation, the first display area includes a second display area and a first sub-area; before the display driver chip sends a first switching instruction to the display screen, the method further includes: the display driver chip sending a second image frame to the display screen, the second image frame being the last image frame displayed in the first display state, and the image corresponding to the first sub-area in the second image frame being a black image; the display screen displaying the second image frame in the first display area.

[0046] Eighthly, this application provides a display method that can be executed by an electronic device, the electronic device including a display screen; the method includes: when the display screen is in a first display state, in response to a first operation by a user, the electronic device instructs the display screen to switch from the first display state to a second display state, the first display state being for displaying in a first display area, and the second display state being for displaying in a second display area; displaying a first image frame in the second display area of ​​the display screen.

[0047] In one possible implementation, after responding to a user's first operation and before the electronic device instructs the display screen to switch from the first display state to the second display state, the method further includes: controlling the off-screen area corresponding to the second display state in the display screen to enter an off-screen state, and controlling the second display area in the display screen to enter a screen-on state.

[0048] In one possible implementation, the first display area and the second display area are non-overlapping display areas; before the electronic device instructs the display screen to switch from the first display state to the second display state, the method further includes: displaying a second image frame in the first display area, the second image frame being a black image.

[0049] In one possible implementation, the first display area includes a second display area and a first sub-area; before the electronic device instructs the display screen to switch from the first display state to the second display state, the method further includes: displaying a second image frame in the first display area, wherein the image corresponding to the first sub-area in the second image frame is a black image.

[0050] Ninthly, this application provides a display method that can be executed by a display device, the display device including a display driver chip and a display screen, the method including: the display screen being in a first state of a screen-off state, responding to a second operation by a user, the second operation being used to wake up the display screen, the display screen being powered on, the display screen turning off the light-emitting enable signal of the screen-off area corresponding to the first state, the display screen controlling the display area corresponding to the first state to enter a screen-on state, and displaying a third image frame sent by the display driver chip in the display area corresponding to the first state.

[0051] In one possible implementation, the display screen includes a first area and a second area, and the first state includes a first state, a second state, or a third state, wherein the first state is for display in the first area, the second state is for display in the second area, and the third state is for display in the entire area of ​​the display screen.

[0052] In one possible implementation, the method further includes: before receiving the third image frame sent by the display driver chip, the display screen receives a black image frame sent by the display driver chip; the display screen displays the black image frame in the third display area.

[0053] Tenthly, this application provides a display method that can be executed by an electronic device, the electronic device including a display screen; the method includes: the display screen being in a first state of a screen-off state, responding to a second operation by a user, the second operation being used to wake up the display screen and control the display screen to power on; controlling the display screen to turn off the light-emitting enable signal of the screen-off area corresponding to the first state, and controlling the display area of ​​the display screen corresponding to the first state to enter a screen-on state; and displaying a third image frame in the display area corresponding to the first state.

[0054] Eleventhly, this application provides a display method, which can be executed by a display device, the display device including a display driver chip and a display screen, the method comprising: the display screen being in a screen-off state of a first state, responding to a second operation by a user, the second operation being used to wake up the display screen; the display screen being powered on in a default display state; the display screen receiving a second switching instruction sent by the display driver chip, the second switching instruction being used to instruct the display screen to switch from the default display state to the first state; the display screen switching from the default display state to the first state according to the second switching instruction; and the display screen displaying a third image frame sent by the display driver chip in a display area corresponding to the first state.

[0055] In one possible implementation, the display screen includes a first area and a second area, and the first state includes a first state, a second state, or a third state, wherein the first state is for display in the first area, the second state is for display in the second area, and the third state is for display in the entire area of ​​the display screen.

[0056] In one possible implementation, the method further includes: after sending the second switching instruction to the display screen, the display driver chip sends a second screen-off instruction to the display screen; the display screen controls the screen-off area corresponding to the first state to enter the screen-off state according to the second screen-off instruction.

[0057] In one possible implementation, the method further includes: before sending the third image frame to the display screen, the display driver chip sends a second screen-on command to the display screen; the display screen controls the display area corresponding to the first state to enter the screen-on state according to the second screen-on command.

[0058] In one possible implementation, the method further includes: before receiving the third image frame sent by the display driver chip, the display screen receives a black image frame sent by the display driver chip; the display screen displays the black image frame in the third display area.

[0059] In a twelfth aspect, this application provides a display method, which can be executed by an electronic device including a display screen; the method includes: the display screen being in a first state of being off-screen; responding to a second operation by a user, the second operation being used to wake up the display screen and control the display screen to power on in a default display state; controlling the display screen to switch from the default display state to the first state, and displaying a third image frame in the display area corresponding to the first state.

[0060] In one possible implementation, before the electronic device displays the third image frame in the display area corresponding to the first state, the method further includes: controlling the screen-off area corresponding to the first state in the display screen to enter a screen-off state, and controlling the display area corresponding to the first state in the display screen to enter a screen-on state.

[0061] In a thirteenth aspect, this application provides an electronic device including at least one processor and at least one memory, wherein the at least one memory stores computer program instructions. When the electronic device is in operation, the at least one processor executes the method executed by the electronic device in the eighth aspect and its embodiments described above, or executes the method executed by the electronic device in the tenth aspect and its embodiments described above, or executes the method executed by the electronic device in the twelfth aspect and its embodiments described above.

[0062] In a fourteenth aspect, this application also provides a computer program product containing instructions that, when the computer program product is run on a computer, cause the computer to perform the method executed by a display device or electronic device in any of the seventh to twelfth aspects and their respective embodiments.

[0063] In a fifteenth aspect, this application also provides a computer-readable storage medium storing a computer program that, when executed by a computer, causes the computer to perform the method executed by a display device or electronic device in any of the seventh to twelfth aspects and their respective embodiments.

[0064] In a sixteenth aspect, this application also provides a chip for reading a computer program stored in a memory and executing a method executed by an electronic device in any of the above aspects and embodiments, such as executing a method executed by a display driver chip in any of the above aspects and embodiments, or executing a method executed by a system-level chip in any of the above aspects and embodiments.

[0065] In a seventeenth aspect, this application also provides a chip system including a processor for supporting a computer device in implementing the methods executed by electronic devices in any of the above aspects and their embodiments. In one possible implementation, the chip system further includes a memory for storing programs and data necessary for the computer device. The chip system may be composed of chips or may include chips and other discrete devices.

[0066] The technical effects that can be achieved by any of the technical solutions in aspects seven through seventeen above can be described with reference to the technical effects that can be achieved by the technical solutions in aspects one through six above, and the repeated parts will not be repeated. Attached Figure Description

[0067] Figure 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0068] Figure 2 is a software structure block diagram of an electronic device provided in an embodiment of this application;

[0069] Figure 3 is a schematic diagram of a GOA bilateral drive provided in an embodiment of this application;

[0070] Figure 4 is a display system architecture diagram to which a display state switching method provided in this application is applicable;

[0071] Figure 5 is a schematic diagram of the display status of an electronic device provided in an embodiment of this application;

[0072] Figure 6 is a waveform example diagram provided in an embodiment of this application;

[0073] Figure 7 is a schematic diagram of control signals corresponding to each display area in a display screen provided in an embodiment of this application;

[0074] Figure 8 is a schematic diagram of the circuit unit structure of the display screen in an embodiment of this application;

[0075] Figure 9 is a waveform example diagram provided in an embodiment of this application;

[0076] Figure 10 is another example of a waveform provided in an embodiment of this application;

[0077] Figure 11 is another example of a waveform provided in an embodiment of this application;

[0078] Figure 12 is a schematic diagram of another display state switching provided in an embodiment of this application;

[0079] Figure 13 is a schematic diagram of another display state switching provided in an embodiment of this application;

[0080] Figure 14 is a schematic diagram of another display state switching provided in an embodiment of this application;

[0081] Figure 15 is a schematic diagram of another display state switching provided in an embodiment of this application;

[0082] Figure 16 is a schematic diagram of another display state switching provided in an embodiment of this application;

[0083] Figure 17 is a schematic diagram of another display state switching provided in an embodiment of this application;

[0084] Figure 18 is a schematic diagram of another display state switching provided in an embodiment of this application;

[0085] Figure 19 is a waveform example diagram provided in an embodiment of this application;

[0086] Figure 20 is a waveform example diagram provided in an embodiment of this application;

[0087] Figure 21 is a schematic diagram showing a power-on process according to an embodiment of this application;

[0088] Figure 22 is a flowchart illustrating a display method provided in an embodiment of this application;

[0089] Figure 23 is a schematic diagram of a display device provided in an embodiment of this application;

[0090] Figure 24 is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0091] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings. In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0092] It should be understood that in the embodiments of this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0093] First, the electronic devices in the embodiments of this application and embodiments for using such electronic devices will be described. The electronic devices in the embodiments of this application can be tablet computers, mobile phones, in-vehicle devices, augmented reality (AR) / virtual reality (VR) devices, laptop computers, ultra-mobile personal computers (UMPCs), netbooks, personal digital assistants (PDAs), wearable devices, etc. The embodiments of this application do not impose any restrictions on the specific type of electronic devices.

[0094] In some embodiments of this application, the electronic device may also be a portable terminal device that includes other functions such as a personal digital assistant and / or a music player. Exemplary embodiments of the portable terminal device include, but are not limited to, devices equipped with... Or portable terminal devices with other operating systems.

[0095] Figure 1 is a schematic diagram of the structure of an electronic device 100 provided in an embodiment of this application. As shown in Figure 1, the electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headphone jack 170D, a sensor module 180, buttons 190, a motor 191, an indicator 192, a camera 193, a display module 194, and a subscriber identification module (SIM) card interface 195, etc.

[0096] Processor 110 may include one or more processing units, such as an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural network processing unit (NPU). Different processing units may be independent devices or integrated into one or more processors. The controller may serve as the central nervous system and command center of the electronic device 100. The controller can generate operation control signals based on instruction opcodes and timing signals to control instruction fetching and execution. Processor 110 may also include memory for storing instructions and data. In some embodiments, the memory in processor 110 is a cache memory. This memory can store instructions or data that processor 110 has recently used or is repeatedly used. If processor 110 needs to reuse an instruction or data, it can directly retrieve it from the memory. This avoids repeated access, reduces the waiting time of processor 110, and thus improves system efficiency.

[0097] USB interface 130 is a USB standard compliant interface, which can be a Mini USB interface, Micro USB interface, USB Type-C interface, etc. USB interface 130 can be used to connect a charger to charge electronic device 100, and can also be used for data transfer between electronic device 100 and peripheral devices. Charging management module 140 receives charging input from the charger. Power management module 141 connects battery 142, charging management module 140, and processor 110. Power management module 141 receives input from battery 142 and / or charging management module 140 to power processor 110, internal memory 121, external memory, display screen 1943, camera 193, and wireless communication module 160, etc.

[0098] The wireless communication function of electronic device 100 can be implemented through antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, modem processor, and baseband processor. Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 100 can be used to cover one or more communication frequency bands. Different antennas can also be multiplexed to improve antenna utilization. For example, antenna 1 can be multiplexed as a diversity antenna for a wireless local area network. In some other embodiments, the antennas can be used in conjunction with tuning switches.

[0099] The mobile communication module 150 can provide solutions for wireless communication, including 2G / 3G / 4G / 5G, applied to the electronic device 100. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves via antenna 1, and perform filtering, amplification, and other processing on the received electromagnetic waves before transmitting them to a modem processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modem processor and convert it into electromagnetic waves for radiation via antenna 1. In some embodiments, at least some functional modules of the mobile communication module 150 may be housed in the processor 110. In some embodiments, at least some functional modules of the mobile communication module 150 and at least some modules of the processor 110 may be housed in the same device.

[0100] The wireless communication module 160 can provide solutions for wireless communication applications on the electronic device 100, including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), and infrared (IR) technologies. The wireless communication module 160 can be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via antenna 2, performs frequency modulation and filtering of the electromagnetic wave signals, and sends the processed signal to processor 110. The wireless communication module 160 can also receive signals to be transmitted from processor 110, perform frequency modulation and amplification, and convert them into electromagnetic waves for radiation via antenna 2.

[0101] In some embodiments, antenna 1 of electronic device 100 is coupled to mobile communication module 150, and antenna 2 is coupled to wireless communication module 160, enabling electronic device 100 to communicate with networks and other devices via wireless communication technology. The wireless communication technology may include Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Time-Division Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE), BT, GNSS, WLAN, NFC, FM, and / or IR technologies, etc. The GNSS may include the Global Positioning System (GPS), the Global Navigation Satellite System (GLONASS), the BeiDou Navigation Satellite System (BDS), the Quasi-Zenith Satellite System (QZSS), and / or satellite-based augmentation systems (SBAS).

[0102] Display module 194 receives image data sent by the processor and displays the image data accordingly. Display module 194 may include DDIC 1941, GOA driving circuit 1942, and display screen 1943. DDIC 1941 is the control element of display module 194, used to send driving signals and image data to display screen 1943 in the form of electrical signals. GOA driving circuit is used to implement the progressive scan driving function of display screen 1943. Display screen 1943 is used to display images and application interfaces, such as displaying application pages installed on electronic device 100. Display screen 1943 may be a liquid crystal display (LCD), organic light-emitting diode (OLED), active-matrix organic light-emitting diode (AMOLED), flexible light-emitting diode (FLED), MiniLED, MicroLED, Micro-OLED, quantum dot light-emitting diode (QLED), etc. In some embodiments, the electronic device 100 may include one or N displays 1943, where N is a positive integer greater than 1. In this embodiment, the folding screen of the electronic device is a display 1943, which can be folded into various folding forms, such as a tri-fold state, which can be, for example, the first device state shown in Figure 5(a); or the display 1943 can be folded into the second device state shown in Figure 5(b); or each area of ​​the display can be folded into the third device state shown in Figure 5(c).

[0103] Camera 193 is used to capture still images or videos. An object is projected onto a photosensitive element by generating an optical image through the lens. The photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element converts the light signal into an electrical signal, which is then passed to an ISP for conversion into a digital image signal. The ISP outputs the digital image signal to a DSP for processing. The DSP converts the digital image signal into image signals in standard RGB, YUV, or other formats. In some embodiments, the electronic device 100 may include one or N cameras 193, where N is a positive integer greater than 1.

[0104] Internal memory 121 can be used to store computer executable program code, which includes instructions. Processor 110 executes various functional applications and data processing of electronic device 100 by running the instructions stored in internal memory 121. Internal memory 121 may include a program storage area and a data storage area. The program storage area may store the operating system and software code for at least one application program. The data storage area may store data generated during the use of electronic device 100 (e.g., captured images, recorded videos, etc.). Furthermore, internal memory 121 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, universal flash storage (UFS), etc.

[0105] The external storage interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device. The external memory card communicates with the processor 110 through the external storage interface 120 to perform data storage functions. For example, images, videos, and other files can be saved on the external memory card.

[0106] Electronic device 100 can implement audio functions, such as music playback and recording, through audio module 170, speaker 170A, receiver 170B, microphone 170C, headphone jack 170D, and application processor.

[0107] The sensor module 180 may include a pressure sensor 180A, an acceleration sensor 180B, a touch sensor 180C, a gravity sensor 180D, a Hall sensor 180E, etc.

[0108] Pressure sensor 180A is used to sense pressure signals and can convert the pressure signals into electrical signals. In some embodiments, pressure sensor 180A may be located on display screen 1943.

[0109] Touch sensor 180C, also known as a "touch panel," can be located on display screen 1943. The touch sensor 180C and display screen 1943 together form a touchscreen, also known as a "touch screen." Touch sensor 180C detects touch operations applied to or near it. The touch sensor can transmit the detected touch operation to the application processor to determine the type of touch event. Visual output related to the touch operation can be provided through display screen 1943. In other embodiments, touch sensor 180C may also be located on the surface of electronic device 100, in a different position than display screen 1943.

[0110] The gravity sensor 180D is used to measure gravity. In this embodiment, the folding angle of the display screen 1943 can be calculated based on the data measured by the gravity sensor 180D and the acceleration sensor 180B.

[0111] The Hall sensor 180E is used to determine the opening and closing state of the part of the display screen 1943 connected by the folding axis in the electronic device 100.

[0112] Buttons 190 include a power button, volume buttons, etc. Buttons 190 can be mechanical buttons or touch buttons. Electronic device 100 can receive button inputs and generate key signal inputs related to user settings and function control. Motor 191 can generate vibration alerts. Motor 191 can be used for incoming call vibration alerts or for touch vibration feedback. For example, touch operations applied to different applications (such as taking photos, audio playback, etc.) can correspond to different vibration feedback effects. Touch vibration feedback effects can also be customized. Indicator 192 can be an indicator light, used to indicate charging status, battery level changes, or to indicate messages, missed calls, notifications, etc. SIM card interface 195 is used to connect a SIM card. The SIM card can be inserted into or removed from the SIM card interface 195 to achieve contact and separation with electronic device 100.

[0113] The components shown in Figure 1 do not constitute a specific limitation on the electronic device 100. The electronic device may include more or fewer components than shown, or combine some components, or separate some components, or have different component arrangements. Furthermore, the combination / connection relationships between the components in Figure 1 can also be adjusted and modified.

[0114] Figure 2 is a software structure block diagram of an electronic device provided in an embodiment of this application. As shown in Figure 2, the software structure of the electronic device can be a layered architecture. For example, the software can be divided into several layers, each with a clear role and division of labor. The layers communicate with each other through software interfaces. In some embodiments, the operating system is divided into four layers, from top to bottom: the application layer, the application framework layer (framework, FWK), the runtime and system libraries, and the kernel layer.

[0115] The application layer can include a series of application packages. As shown in Figure 2, the application layer can include camera, settings, skin modules, user interface (UI), third-party applications, etc. Third-party applications can include gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, SMS, etc.

[0116] The application framework layer provides application programming interfaces (APIs) and a programming framework for applications in the application layer. The application framework layer can include some predefined functions. As shown in Figure 2, the application framework layer can include a window manager, content provider, view system, phone manager, resource manager, and notification manager.

[0117] The window manager is used to manage windowed applications. It can obtain the screen size, determine if a status bar is present, lock the screen, and capture screenshots. The content provider stores and retrieves data, making this data accessible to applications. This data may include videos, images, audio, made and received phone calls, browsing history and bookmarks, phone books, etc.

[0118] A view system includes visual controls, such as controls for displaying text and controls for displaying images. View systems can be used to build applications. A display interface can consist of one or more views. For example, a display interface including a text notification icon could include views for displaying text and views for displaying images.

[0119] A phone manager is used to provide communication functions for electronic devices. For example, it manages call status (including connection and disconnection).

[0120] The file explorer provides applications with various resources, such as localized strings, icons, images, layout files, video files, and more.

[0121] The notification manager allows applications to display notifications in the status bar. These notifications can be used to deliver informational messages and can disappear automatically after a short pause, requiring no user interaction. For example, the notification manager can be used to notify users of completed downloads or message alerts. The notification manager can also display notifications as icons or scrolling text in the top status bar, such as notifications from background applications, or as dialog boxes on the screen. Examples include displaying text messages in the status bar, emitting sounds, vibrating electronic devices, and flashing indicator lights.

[0122] The runtime includes the core libraries and the virtual machine. The runtime is responsible for the scheduling and management of the operating system.

[0123] The core library consists of two parts: one part contains the functionalities that the Java language needs to call, and the other part contains the core libraries of the operating system. The application layer and application framework layer run in the virtual machine. The virtual machine executes the Java files of the application layer and application framework layer as binary files. The virtual machine is used to perform functions such as object lifecycle management, stack management, thread management, security and exception management, and garbage collection.

[0124] System libraries can include multiple functional modules. For example: surface manager, media libraries, 3D graphics processing libraries (e.g., OpenGL ES), 2D graphics engines (e.g., SGL), image processing libraries, etc.

[0125] The Surface Manager is used to manage the display subsystem and provides the blending of 2D and 3D layers for multiple applications.

[0126] The media library supports playback and recording of various common audio and video formats, as well as still image files. It supports multiple audio and video encoding formats, such as MPEG4, H.264, MP3, AAC, AMR, JPG, and PNG.

[0127] The 3D graphics processing library is used to implement 3D graphics drawing, image rendering, compositing, and layer processing.

[0128] A 2D graphics engine is a graphics engine for 2D drawing.

[0129] The kernel layer is the layer between hardware and software. The kernel layer contains at least the display driver, camera driver, audio driver, and sensor driver.

[0130] The hardware layer can include various types of sensors, such as accelerometers, gyroscopes, and touch sensors.

[0131] The structures shown in Figures 1 and 2 are merely examples of electronic devices provided in the embodiments of this application and are not intended to limit the electronic devices provided in the embodiments of this application. The electronic devices may have more or fewer devices or modules than those shown in Figures 1 or 2.

[0132] In some examples of this application, the structure of the display module 194 shown in Figure 1 can be referenced to Figure 3. Figure 3 shows an example of a GOA dual-side drive structure. Referring to Figure 3, this structure can utilize the GOA input / output (IO) interface of the IC's inner layer to bring out startvertical (STV) signals on different displays separately, so as to control multiple displays individually. Referring to Figure 3, STV1 is a signal used to control the display of the first area, and STV2 is a signal used to control the display of the second area. Through this implementation, the DDIC can control the display of different display areas of the screen separately.

[0133] Figure 4 is a display system architecture diagram applicable to a display method provided in an embodiment of this application. Referring to Figure 4, the display system may include a SOC, a DDIC, and a display screen. The SOC may include the following modules: a sensor foldstate manager, a fold screen manager service, a window manager service (WMS), a display manager service (DMS), a surface flinger (SF), a hardware composer (HWC) module, a high-performance display manager (HDM), a display kernel mode driver (DKMD), a display subsystem accelerator (DACC), and a liquid crystal display kit (LCD KIT).

[0134] The folding state sensor manager is used to obtain folding parameters sent by the folding sensors of electronic devices and send the obtained folding parameters to the folding screen management service.

[0135] The foldable screen management service determines the folding state of the electronic device based on the received folding parameters and sends the size information of the bright screen area corresponding to the folding state to the WMS.

[0136] WMS is used to calculate the position of application icons displayed in the bright area of ​​an electronic device and to determine the motion parameters when the electronic device displays images with animation effects.

[0137] The Display Management System (DMS) manages multiple logical screens, each corresponding to a different display state. As shown in Figure 4, the DMS manages logical screens 1 through N. Logic screen 1 corresponds to the first state shown in Figure 5(a), logical screen 2 corresponds to the second state shown in Figure 5(b), and logical screen 3 corresponds to the third state shown in Figure 5(c). The DMS can set the size of the illuminated area corresponding to the current display state, thereby controlling the on / off state of different display areas in the electronic device's display screen. In this embodiment, the display screen being in an off state means that the light-emitting units in the display screen's circuitry no longer emit light; at this time, the display screen cannot display images. The off state in this embodiment does not include the case where the display screen displays a black image frame.

[0138] The Surface Flinger (SF) is responsible for managing and rendering the graphics window, creating the final displayed image by compositing and blending multiple layers. If the electronic device includes multiple displays, the Surface Flinger needs to composite the content displayed on each display separately, as shown in Figure 4, where the SF is used to composite the content displayed on displays 1 through N.

[0139] HWC is used for layer composition and display, providing hardware support for SF.

[0140] HDM is used to receive business requests from the application framework layer.

[0141] DKMD is used to issue commands to DDIC to drive DDIC. DKMD includes DACC, a small core in DKMD. DACC is used to respond to TE interrupts, send display-related configuration information to DDIC, etc.

[0142] The LCD kit is used to control the power-on and power-off of the display screen via DDIC.

[0143] DDIC is used to receive commands sent by the SOC, convert the commands into signals / commands that the display screen can respond to, and then send the converted signals / commands to the display screen to control the display screen's on / off state and display status.

[0144] In this application embodiment, the electronic device supports multiple display states, and different display states correspond to different display areas. The multiple display states of the electronic device involved in this application embodiment are described below. The display screen of the electronic device in this application embodiment may include a first area and a second area. Based on the first area and the second area of ​​the display screen, the display screen of the electronic device may include three display states: a first state, a second state, and a third state. The first state is displaying in the first area, the second state is displaying in the second area, and the third state is displaying in the entire display area.

[0145] For example, Figure 5 is a schematic diagram of the display state of an electronic device according to an embodiment of this application. Referring to Figure 5, the display screen of the electronic device may include a first area and a second area, and the display screen of the electronic device may include three display states: a first state, a second state, and a third state. Referring to Figure 5(a), a schematic diagram of the first state is shown. When the electronic device screen is in the first state, the first area is lit and the second area is off. Referring to Figure 5(b), a schematic diagram of the second state is shown. When the electronic device is in the second state, the first area is off and the second area is lit. Referring to Figure 5(c), a schematic diagram of the third state is shown. When the electronic device is in the third state, both the first area and the second area are lit.

[0146] Figure 5 is only an example of a display area and not a limitation. The display screen of the electronic device may include more display areas. As shown in Figure 5(c), the first area includes area A, and the second area may also include areas B and C. Based on different folding forms of the electronic device, the electronic device may also make different combinations between adjacent areas in areas A, B, and C to obtain more display states. This application embodiment does not limit this.

[0147] In this embodiment, the different display states of the electronic device can be related to the device state of the electronic device. For example, referring to Figure 5(c), there is a folding axis 1 between the first region and the second region, and a folding axis 2 between region B and region C of the second region. Therefore, the possible device states of the electronic device include the first device state, the second device state, and the third device state as shown in Figure 5. Specifically, when the electronic device is in the first device state, the display state of the electronic device is the first state; when the electronic device is in the second device state, the display state of the electronic device can be the second state; and when the electronic device is in the third device state, the screen display state of the electronic device is the third state.

[0148] In some embodiments, when the electronic device is in a second device state, its display state can also be a first state. In this embodiment, when the electronic device is in a second device state, the electronic device can determine its display state based on the orientation of its screen and / or the user's eye gaze direction. For example, when the electronic device detects that the screen orientation is as shown in Figure 5, with area A facing upwards and areas B and C facing downwards, the electronic device can determine the display state as a first state; when the electronic device detects that the screen orientation is as shown in Figure 5, with areas B and C facing upwards and area A facing downwards, the electronic device can determine the display state as a second state. As another example, when the electronic device detects that the user is looking at area A of the screen, the electronic device can determine the display state as a first state; when the electronic device detects that the user is looking at areas B and C of the screen, the electronic device can determine the display state as a second state.

[0149] This application does not limit the screen folding angle corresponding to different device states. The screen folding angle corresponding to different device states can be a preset value or a preset angle range. For example, when the physical screens corresponding to area A, area B, and area C in Figure 5(c) are completely flattened to the same plane, the device state of the electronic device is the third device state. When the physical screens corresponding to area B and area C are completely flattened to the same plane, and there is a folding angle between the physical screen corresponding to area A and the physical screens corresponding to areas B and C, and the folding angle is less than a preset threshold, the electronic device can also determine that the device state of the electronic device is the third device state.

[0150] Furthermore, the device state and its corresponding display state of the electronic device in the above embodiments are only examples and not limitations. The display state of the electronic device can also be related to user operation, such as the user setting the display state of the electronic device. This application embodiment does not limit this.

[0151] The display method provided in the embodiments of this application is described below. The display method provided in the embodiments of this application can be executed by an electronic device and can be instructed by the SOC and display module in the electronic device. The display module can include a DDIC and a display screen. The electronic device can have the structure shown in FIG1 and / or FIG2 above, wherein the SOC and the display module can also constitute a display system, which can have the display system architecture shown in FIG5.

[0152] In this embodiment, the electronic device's display screen is in a first display state. The electronic device detects a first user operation, which instructs the display screen to switch from the first display state to a second display state. The first display state involves displaying in a first display area, and the second display state involves displaying in a second display area. The first display state can be any of the first, second, and third states shown in Figure 5, and the second display state can be any display state different from the first display state. The user's first operation can be an operation that changes the folding form of the electronic device. For example, referring to Figure 5, if the first operation is the user folding the electronic device from a first device state to a second device state, then the first operation instructs the electronic device to switch from the first state to the second state; or, for example, if the first operation is the user unfolding the electronic device from a first device state to a third device state, then the first operation instructs the electronic device to switch from the first state to the third state.

[0153] After the user inputs a first operation, the DDIC of the electronic device sends a first switching command to the display screen. This first switching command instructs the display screen to switch from a first display state to a second display state. The DDIC then sends a first image frame to the display screen. The display screen, according to the first switching command, switches from the first display state to the second display state and displays the first image frame in the second display area. The first image frame is the image frame displayed in the second display state. In this way, after the user triggers the display screen to switch display states, the DDIC sends a first switching command to the display screen to instruct it to switch display states. The display screen can then switch to the second display state according to the first switching command and display the correct image in the second display area, thus completing the online switching between different display states.

[0154] In this embodiment, after the user triggers the display to switch display states, the DDIC can receive a first switching instruction sent by the SOC and instruct the display to switch from a first display state to a second display state according to the first switching instruction sent by the SOC. The first switching instruction sent by the DDIC to the display is the same as the first switching instruction sent by the SOC to the DDIC; alternatively, the first switching instruction sent by the DDIC to the display is generated by the DDIC based on the first switching instruction sent by the SOC to the DDIC. For example, the first switching instruction sent by the SOC to the DDIC can be a first display area switching instruction, which is used to indicate the operating parameters of the DDIC when the display is in the second display state. The DDIC can generate a first switching instruction based on the first display area switching instruction and send the first switching instruction to the display to instruct the display to switch from the first display state to the second display state. For ease of description, in the following embodiments, the first switching instruction sent by the SOC to the DDIC as a first display area switching instruction will be used as an example.

[0155] In some embodiments, in response to a first operation input by the user, the SOC in the electronic device stops sending image frames corresponding to the first display state to the DDIC. For example, when the first display state is the first state shown in FIG5, in response to the first operation by the user, the SOC stops sending image frames corresponding to the first state.

[0156] In an electronic device, the SOC sends a screen switching command to the DDIC. This screen switching command instructs the DDIC to control the display screen to switch from a first display state to a second display state. In this embodiment, the screen switching command includes multiple commands / signals. During the process of issuing the screen switching command, the SOC first sends a first buffer area switching command to the DDIC. This first buffer area switching command instructs the DDIC to set the image display area to the second display area. For example, the first buffer area switching command can be used to instruct the DDIC to write the start and end coordinates of the first image frame corresponding to the second display state into the GRAM.

[0157] In some embodiments of this application, the GRAM of the DDIC is used to store image data of the image displayed on the display screen. The storage space of the GRAM corresponds to the display screen of the electronic device. Different display areas correspond to different GRAM storage spaces. After receiving the first buffer area switching instruction, the DDIC can switch the image display area from the first display area to the second display area. When the DDIC sends the first image frame to the display screen, it can read the first image frame from the storage space corresponding to the second display area in the GRAM and send the first image frame to the second display area of ​​the display screen.

[0158] The screen switching command sent by the SOC of the electronic device to the DDIC also includes a first display area switching command. After sending the first buffer area switching command to the DDIC, the SOC can send the first display area switching command to the DDIC. The first display area switching command is used to indicate the operating parameters of the DDIC when the display screen is in a second display state. For example, the first display area switching command may include instructions and timing signals for indicating the DDIC's working cycle, as well as instructions for the DDIC to save power during the sleep cycle.

[0159] In this embodiment, after receiving the first display area switching instruction, the DDIC does not immediately trigger the first display area switching instruction to take effect, but instead caches it. The SOC sends a first image frame corresponding to the second display state to the DDIC. This first image frame is the first image frame displayed in the second display state. The DDIC writes the first image frame into the GRAM storage space corresponding to the second display area and triggers the cached first display area switching instruction to take effect. The DDIC generates a first switching instruction based on the first display area switching instruction, sends the first switching instruction to the display screen, and sends the first image frame to the display screen. Thus, the display screen switches from the first display state to the second display state according to the first switching instruction and displays the first image frame in the second display area. In other words, in the display method provided in this embodiment, the DDIC waits until it receives the first image frame displayed in the second display state sent by the SOC before triggering the cached first display area switching instruction to take effect. The DDIC triggering the first display area switching instruction to take effect can be the DDIC generating a first switching instruction based on the first display area switching instruction and sending the first switching instruction to the display screen to switch the display screen from the first display state to the second display state. This solution prevents screen flickering caused by residual random values ​​in the GRAM being sent to the display screen upon power-up when the DDIC takes effect upon receiving the first display area switching command.

[0160] Figure 6 is an example waveform diagram of a display provided in an embodiment of this application. Referring to Figure 6, the source signal waveform is the signal waveform corresponding to the image data sent by the DDIC to the display screen, and the tearing effect (TE) signal waveform is the waveform of the synchronization signal output by the display module to the SOC. The TE signal is used to realize data synchronization. For example, the SOC sends an image frame to the DDIC, and after the DDIC sends the image frame to the display screen, it sends a feedback message to the SOC through the TE pin, thereby ensuring that the display screen can output the image correctly and preventing abnormal display problems such as screen tearing. The Mobile Industry Processor Interface (MIPI) signal waveform is the signal waveform corresponding to the data transmitted based on the MIPI interface. In the embodiment of this application, the MIPI signal waveform is the signal waveform corresponding to the image frame to be displayed sent by the SOC to the DDIC or the signal waveform corresponding to the control command. Taking the user's first operation to indicate a switch from the first state to the second state as an example, in response to the user's first operation, the SOC stops sending the image frame corresponding to the first state to the DDIC, and sends a screen-switching command to the DDIC. The SOC then sends the image frame corresponding to the second state to the DDIC. Upon receiving the image frame corresponding to the second state, the DDIC triggers the first display area switching command in the screen-switching command. The DDIC sends a first switching command to the display screen, and then sends the image frame corresponding to the second state to the display screen. The display screen switches to the second state according to the first switching command and displays the image frame corresponding to the second state in the second display area. Referring to Figure 6, after the display screen switches display states, it can display the image frame corresponding to the second state normally without any screen flickering issues.

[0161] In some embodiments of this application, after the electronic device detects the user's first operation, the DDIC can send a first screen-off command to the display screen before sending a first switching command. The display screen then controls the screen-off area corresponding to the second display state to enter the screen-off state according to the first screen-off command. For example, if the first operation is used to instruct the display screen to switch from the first state to the second state, the first screen-off command sent by the DDIC to the display screen is used to instruct the display screen to control the first area shown in Figure 5 to enter the screen-off state, thereby ensuring that the screen-off area corresponding to the second display state is in the screen-off state during the display state switching process, preventing abnormal display problems in the screen-off area corresponding to the second display state. After sending the first image frame to the display screen, the DDIC sends a first screen-on command to the display screen. The display screen controls the second display area to enter the screen-on state according to the first screen-on command, so that the display screen controls the second display area to turn on after receiving the first image frame, ensuring that the image displayed after the display screen turns on is the correct first image frame.

[0162] In some embodiments of this application, during the process of the SOC sending a screen-switching command to the DDIC, the SOC sends a first light-emitting enable signal shutdown command to the DDIC before sending the first buffer area switching command. This first light-emitting enable signal shutdown command instructs the shutdown of the light-emitting enable signal corresponding to the off-screen area in the second display state, thereby causing the off-screen area in the second display state to enter an off-screen state. After receiving the first light-emitting enable signal shutdown command, the DDIC can determine the off-screen area in the second display state and generate a first off-screen command based on it. The DDIC then sends the first off-screen command to the display screen, which executes the command, thereby shutting down the light-emitting enable signal of the off-screen area corresponding to the second display state. The off-screen area will not display an image. For example, in this embodiment, the light-emitting enable signal can be an ESTV signal. After the DDIC instructs the display screen to activate the ESTV signal of a certain display area, the light-emitting unit corresponding to that display area starts emitting light, and the display area begins to display an image. When the ESTV signal of that display area is not activated, even if the DDIC sends the image stored in the GRAM to the display screen, the display area will still not display an image.

[0163] As described above, the screen-switching command sent by the SOC to the DDIC also includes a first buffer area switching command and a first display area switching command sent sequentially. After sending the screen-switching command to the DDIC, the SOC sends the first image frame displayed in the second display state to the DDIC. The first image frame is the first image frame displayed in the second display state. After receiving the first image frame sent by the SOC, the DDIC can trigger the buffered display area switching command to take effect. After a preset time after sending the first image frame to the DDIC, the SOC can send a second light-emitting enable signal turn-on command to the DDIC. This second light-emitting enable signal turn-on command is used to instruct the DDIC to turn on the light-emitting enable signal corresponding to the second display area. After receiving the second light-emitting enable signal turn-on command, the DDIC generates a first screen-on command based on the second light-emitting enable signal turn-on command and sends the first screen-on command to the display screen. After the display screen executes the first screen-on command, the second display area enters the screen-on state, at which time the display screen displays the first image frame in the second display area. The preset duration value can be related to the preset frame rate. For example, when the SOC sends an image frame to the DDIC according to the preset frame rate, assuming the SOC sends the first image frame to the DDIC at T1, the SOC can send the second image frame at T1+a according to the preset frame rate. The preset duration value can be ax, that is, the SOC can send the second light-enabling signal to the DDIC at T1+ax. Here, a is the time interval between the SOC sending two adjacent image frames calculated according to the preset frame rate, and x is a preset value, such as x can be 100 microseconds.

[0164] When the second display state is the third state shown in Figure 1, since both the first and second regions are in the bright state in the third state, the SOC does not need to send the first light-emitting enable signal to the DDIC to turn off, and the DDIC does not need to send the first screen-off command to the display screen.

[0165] As shown in Figure 5, the electronic device in this embodiment of the application has multiple display states. The process of switching between different display states of the electronic device will be further described below.

[0166] For example, Figure 7 is a schematic diagram of control signals corresponding to various display areas in a display screen provided in an embodiment of this application. Referring to Figure 7, in this embodiment, the ESTV1 signal is a light-emitting enable signal for controlling the light-emitting unit in the first area to emit light, and the ESTV2 signal is a light-emitting enable signal for controlling the light-emitting unit in the second area to emit light. In the display state switching method provided in this embodiment, the ESTV off command and ESTV on command sent by the SOC to the DDIC during the display state switching process are related to the second display state after the switch. Table 1 below provides an exemplary correspondence between the ESTV off command and ESTV on command sent by the SOC and the second display state.

[0167] Table 1. Correspondence between ESTV shutdown command, ESTV turn-on command and second display state

[0168] Referring to Table 1 above, when the electronic device switches from other display states to the first state, the SOC first sends a command to the DDIC to indicate that ESTV2 is turned off. After sending the preset duration of the first frame image displayed in the first state to the DDIC, the SOC sends a command to the DDIC to indicate that ESTV1 is turned on. When the electronic device switches from other display states to the second state, the SOC first sends a command to the DDIC to indicate that ESTV1 is turned off. After sending the preset duration of the first frame image displayed in the second state to the DDIC, the SOC sends a command to the DDIC to indicate that ESTV2 is turned on. When the electronic device switches from other display states to the third state, after sending the preset duration of the first frame image displayed in the third state to the DDIC, the SOC sends a command to the DDIC to indicate that ESTV1 and ESTV2 are turned on.

[0169] In this way, during the display state switching process, the SOC can instruct the DDIC to turn on the light-emitting enable signal of the bright screen area corresponding to the second display state after sending the first image frame corresponding to the second display state to the DDIC. This allows the SOC to store the first image frame corresponding to the second display state in the GRAM after sending it to the DDIC, and the DDIC to read the first image frame from the GRAM and send it to the display screen. Only then can the display screen be instructed to control the bright screen area corresponding to the second display state to turn on, ensuring that the electronic device can accurately display the correct image in the bright screen area corresponding to the second display state.

[0170] In the foregoing embodiments, the display screen of the electronic device is in a first display state, which can be any content such as the lock screen interface, main interface, and application interface of the electronic device. Through the display method provided in this application embodiment, the electronic device can complete the online switching of display states without powering off the display screen, thereby improving the efficiency of switching display states while ensuring the display effect.

[0171] Furthermore, when an electronic device supports always-on display (AOD), it can still display the AOD interface in the first display state. In this scenario, after the user inputs a first operation, the electronic device needs to display the interface in the second display state, which could be, for example, a lock screen or a main screen. When the electronic device exits the AOD display in the first display state, its SOC stops sending the image frames corresponding to the first display state to the DDIC. Therefore, the SOC does not need to perform the process of stopping sending the image frames corresponding to the first display state again; instead, the SOC can directly send a screen-switching command to the DDIC to complete the switch from the first display state to the second display state. For specific implementation details, please refer to the above embodiments; repeated details will not be elaborated further.

[0172] Furthermore, for example, Figure 8 is a schematic diagram of the circuit unit structure of the display screen in an embodiment of this application. Figure 8 shows a control circuit for a light-emitting diode as an example. Referring to Figure 8, the screen-off area of ​​the display screen based on this circuit structure is not truly completely powered off, but rather the gate signal of the transistor in the path is pulled high or low. For example, if the gate signals of T3 and T4 shown in Figure 8 are pulled high or low, the light-emitting diode controlled by this circuit unit will no longer emit light. Since the screen-off area is not truly completely powered off, the signal in the CST capacitor in the circuit shown in Figure 8 cannot be completely released. When the display screen of the electronic device switches the display state, and the display area switches from the screen-off state to the screen-on state, the CST discharges when the circuit is turned on. At this time, the display area will flash the image displayed before the last screen-off, causing display abnormality. In addition, as mentioned above, the GRAM of the DDIC may store random values ​​written when the display is initially powered on, or the image frame displayed when the display area was last lit. When a display state switch occurs, if the DDIC receives a self-refresh instruction, the DDIC will trigger the first display area switching instruction in the cache to take effect according to the self-refresh instruction, and send the random values ​​stored in the GRAM or the image frame displayed when the display was last lit to the display, which will cause abnormal display problems such as screen distortion or flashing of the image displayed before the last screen was turned off. The scheme provided in this application, in which the SOC instructs the DDIC to turn on the light-emitting enable signal of the second display area after a preset time period of sending the first image frame to the DDIC, allows the DDIC to store the first image frame in GRAM and read it from GRAM and send it to the display screen after receiving the first image frame sent by the SOC. At this time, the circuit capacitor corresponding to the second display area of ​​the display screen contains the image signal corresponding to the first image frame. The SOC then instructs the DDIC to turn on the light-emitting enable signal of the second display area. The DDIC sends a first screen-on command to the display screen. After the display screen executes the first screen-on command, it displays the first image frame in the second display area. This can avoid the aforementioned abnormal display problem and ensure the display effect.

[0173] For example, Figure 9 is a waveform example diagram of a display provided in an embodiment of this application. Referring to Figure 9, the following is an example of a user's first operation used to indicate a switch from a first state to a second state. In response to the user's first operation, the SOC stops sending the image frame corresponding to the first state to the DDIC, and the SOC sends an ESTV1 shutdown command to the DDIC. The DDIC generates a first screen-off command based on the received ESTV1 shutdown command, and sends the first screen-off command to the display screen. The display screen controls the first area to enter the screen-off state. As shown in Figure 9, when ESTV1 is shut down, the electrical signal corresponding to ESTV1 is adjusted to a high level. The SOC sends a first buffer area switching command and a first display area switching command to the DDIC, and the DDIC buffers the first display area switching command. The SOC sends the first image frame of the second state display to the DDIC. At this time, the DDIC triggers the first display area switching instruction in the buffer, and sends a first switching instruction to the display screen. The DDIC stores the first image frame in the GRAM storage space corresponding to the second area, and reads the first image frame from the GRAM and sends it to the display screen. The display screen switches to the second state according to the first switching instruction and receives the first image frame sent by the DDIC. At this time, the signal stored in the capacitor of the circuit of the second area of ​​the display screen is the image signal corresponding to the first image frame. However, since the ESTV signal of the second area is not yet turned on, the second area does not display. After a preset time after the SOC sends the first image frame to the DDIC, it sends an ESTV2 turn-on instruction to the DDIC. The DDIC generates a first screen-on instruction according to the received ESTV2 turn-on instruction and sends the first screen-on instruction to the display screen. The display screen controls the second area to enter the screen-on state, and the second area normally displays the first image frame corresponding to the second state. The SOC continues to send the image frame corresponding to the second state to the DDIC. After receiving the image frame corresponding to the second state, the DDIC sends the image frame corresponding to the second state to the display screen, and the display screen can normally display the image frame in the second area.

[0174] In some examples, after receiving the first image frame corresponding to the second state, the DDIC triggers the cached first display area switching instruction to take effect. The DDIC sends a first switching instruction to the display screen. At this time, if the CST of the display circuit corresponding to the second area stores the image signal corresponding to the image frame previously displayed in the second area, when the display screen executes the first switching instruction to switch to the second state, the circuit turns on the CST to discharge, refreshing the image frame corresponding to the image signal stored in the CST to the display screen. However, since the ESTV2 of the second area is still not turned on at this time, the second area is still in a screen-off state and will not display any abnormal images. After the SOC sends the first image frame corresponding to the second state to the DDIC, the DDIC writes the first image frame to the GRAM and reads the first image frame from the GRAM and sends it to the display screen. The SOC sends an ESTV2 turn-on instruction to the DDIC, and the DDIC sends a first screen-on instruction to the display screen. The display screen executes the first screen-on instruction to control the second area to enter the screen-on state. At this time, the second area can normally display the image frame corresponding to the second state.

[0175] For example, Figure 10 is a waveform example diagram of a display provided by an embodiment of this application. Referring to Figure 10, taking the user's first operation to indicate a switch from the first state to the second state as an example, in response to the user's first operation, the SOC stops sending the image frame corresponding to the first state to the DDIC, and the SOC sends an ESTV1 shutdown command to the DDIC. The DDIC generates a first screen-off command based on the received ESTV1 shutdown command, and the DDIC sends the first screen-off command to the display screen. The display screen executes the first screen-off command to control the first area to enter the screen-off state. As shown in Figure 10, when ESTV1 is turned off, the electrical signal corresponding to ESTV1 is adjusted to a high level. The SOC sends a first buffer area switching command and a first display area switching command to the DDIC, and the DDIC buffers the first display area switching command. As described in the previous embodiments, after caching the first display area switching instruction, the DDIC waits to receive the first image frame corresponding to the second state sent by the SOC or receives a self-refresh instruction before triggering the first display area switching instruction to take effect. Referring to Figure 10, if the DDIC receives the self-refresh instruction before receiving the first image frame corresponding to the second state sent by the SOC, since the self-refresh instruction will also trigger the cached instruction to take effect, the DDIC, upon receiving the self-refresh instruction, responds to the self-refresh instruction by sending a first switching instruction to the display screen. This first switching instruction is used to instruct the display screen to switch from the first state to the second state, and the DDIC reads the image data corresponding to the second area stored in the GRAM and sends it to the display screen. Since the DDIC has not yet received the image frame corresponding to the second state sent by the SOC, the image data stored in the storage space corresponding to the second area in the GRAM is a random value or the image frame displayed in the second area during the most recent screen-on state. However, since the SOC does not instruct the DDIC to turn on ESTV2 at this time, and the DDIC does not instruct the display screen to control the second area to turn on, that is, the second area is still in the off state. Therefore, the user will not see abnormal display problems such as screen distortion or flashing of the image displayed before the last screen-off state. After the SOC sends the first image frame corresponding to the second state to the DDIC, the DDIC writes the first image frame to the GRAM and reads it from the GRAM to send to the display. The SOC sends an ESTV2 turn-on command to the DDIC, and the DDIC sends a first screen-on command to the display. The display then controls the second area to enter the screen-on state, at which point the second area can normally display the image frame corresponding to the second state.

[0176] For example, Figure 11 is a waveform example diagram of a display provided by an embodiment of this application. Referring to Figure 11, the user's first operation is used to indicate a switch from the first state to the third state as an example. In response to the user's first operation, since both the first and second areas are in the on state in the third state, the SOC does not need to instruct the DDIC to turn off the ESTV signal of the display area. Referring to Figure 11, ESTV1 is always in the on state. The SOC sends a first buffer area switching instruction and a first display area switching instruction to the DDIC. The DDIC switches the image display area from the first area to the first and second areas according to the first buffer area switching instruction, and buffers the first display area switching instruction. The SOC sends the first image frame corresponding to the third state to the DDIC. At this time, the DDIC triggers the first display area switching instruction to take effect. The DDIC sends a first switching instruction to the display screen. The DDIC stores the first image frame in the GRAM and reads the first image frame from the GRAM and sends it to the display screen. The display screen switches to the third state according to the first switching instruction and receives the first image frame sent by the DDIC. At this time, since ESTV2 has not yet been turned on, the second area is still in the off state, while the first area can be displayed normally. After the SOC sends the first image frame to the DDIC for a preset duration, it sends the ESTV1 open command and the ESTV2 open command to the DDIC. After receiving the ESTV1 open command and the ESTV2 open command, the DDIC generates the first screen-on command. The DDIC sends the first screen-on command to the display screen. The display screen repeatedly controls the first area to enter the screen-on state and controls the second area to enter the screen-on state according to the first screen-on command. The first area and the second area can normally display the image frame corresponding to the third state.

[0177] The following example illustrates the switching methods between the display states shown in Figure 1.

[0178] Figure 12 is a schematic diagram of an electronic device switching from a first state to a second state according to an embodiment of this application. Referring to Figure 12, the user's first operation is used to instruct the electronic device to switch from the first state to the second state. Referring to Figure 12(a), when the display screen of the electronic device is in the first state, the first area is in a bright state and the second area is in a dark state, and the display screen displays an image in the first area. In response to the user's first operation, the SOC stops sending the image frame corresponding to the first state to the DDIC and sends a screen-switching command to the DDIC. As described above, the screen-switching command includes an ESTV1 shutdown command for instructing the shutdown of ESTV1, a buffer area switching command, and a display area switching command. Referring to Figure 12(b), the DDIC generates a first dark screen command according to the ESTV1 shutdown command, and sends the first dark screen command to the display screen. The display screen controls the first area to enter the dark state, and the first area stops displaying the image. The DDIC switches the image display area from the first area to the second area according to the buffer area switching command and buffers the display area switching command. Referring to Figure 12(c), the SOC sends the first image frame corresponding to the second state to the DDIC. The DDIC triggers the display area switching instruction in the buffer, and sends a first switching instruction to the display screen. The display screen switches to the second state according to the first switching instruction. The DDIC stores the received first image frame in the GRAM storage space corresponding to the second area and sends the first image frame to the display screen. At this time, the image signal corresponding to the first image frame will cover the signal remaining in the capacitor in the circuit of the second area. Since ESTV2 has not yet been turned on, the second area still does not display an image. Referring to Figure 12(d), after a preset time after sending the first image frame, the SOC sends an ESTV2 turn-on instruction to the DDIC to indicate that ESTV2 should be turned on. The DDIC sends a first screen-on instruction to the display screen, and the display screen controls the second area to enter the screen-on state, displaying the image frame corresponding to the second state in the second area. During the display state switching process, the display screen can display images in the switched display area in the form of animation, as shown in (d) and (e) of Figure 12. The display screen can display images with animation from left to right. The display screen can display preset images in areas where the animation has not moved to, such as a screenshot of the background image of the image frame corresponding to the second area.

[0179] Figure 12 illustrates the use of a display screen showing wallpaper as an example. The display screen can also display clock controls, cellular network icons, wireless network icons, application icons, etc. The other content displayed on the display screen, besides wallpaper, corresponds to the display state after the screen is switched. For example, when the display screen switches from the first state to the second state as shown in Figure 12, if the size of the second area is larger than the first area, the display screen can display more application icons in the second area than in the first area after switching display states. Furthermore, the layout of the application icons displayed in the second area is different from that in the first area. This application embodiment does not limit this aspect. Additionally, the interface shown in Figure 12, with multiple display areas on the same plane, is only for demonstrating the display effect and does not limit the folding state of the electronic device corresponding to the display state. The dotted line in the figure is only used to distinguish the first and second areas; the dotted line is not actually displayed on the electronic device. This description can also be referenced in the following examples of this application, and repeated descriptions will not be repeated.

[0180] Figure 13 is a schematic diagram of an electronic device switching from a second state to a first state according to an embodiment of this application. Referring to Figure 13, the user's first operation is used to instruct the electronic device to switch from the second state to the first state. Referring to Figure 13(a), when the display screen of the electronic device is in the second state, the first area is in a screen-off state, the second area is in a screen-on state, and the display screen displays an image in the second area. In response to the user's first operation, the SOC stops sending the image frame corresponding to the second state to the DDIC and sends a screen-switching command to the DDIC. As described above, the screen-switching command includes an ESTV2 shutdown command for instructing the shutdown of ESTV2, a buffer area switching command, and a display area switching command. Referring to Figure 13(b), the DDIC generates a first screen-off command according to the ESTV2 shutdown command, and sends the first screen-off command to the display screen, causing the display screen to control the second area to enter a screen-off state. The DDIC switches the image display area from the second area to the first area according to the buffer area switching command and buffers the display area switching command. Referring to Figure 13(c), the SOC sends the first image frame corresponding to the first state to the DDIC. The DDIC triggers the display area switching instruction in the buffer, and sends a first switching instruction to the display screen. The display screen switches to the first state according to the first switching instruction. The DDIC stores the received first image frame in the GRAM storage space corresponding to the first area and sends the first image frame to the display screen. At this time, the first image frame will cover the residual signal in the capacitor in the circuit of the first area. Since ESTV1 has not yet been turned on, the first area still does not display an image. Referring to Figure 13(d), after a preset time after sending the first image frame, the SOC sends an ESTV1 turn-on instruction to the DDIC to indicate that ESTV1 should be turned on. The DDIC sends a first screen-on instruction to the display screen, and the display screen controls the display area to enter the screen-on state, displaying the image frame corresponding to the first state in the first area. During the display state switching process, the display screen can display images in the switched display area in the form of animation, as shown in (d) and (e) of Figure 13. The display screen can display images with a right-to-left animation effect. The display screen can display a preset image in the area where the animation effect has not moved to. For example, the preset image can be a screenshot of the background image of the image frame corresponding to the first area.

[0181] Figure 14 is a schematic diagram of an electronic device switching from a second state to a third state according to an embodiment of this application. Referring to Figure 14, the user's first operation is used to instruct the electronic device to switch from the second state to the third state. Referring to Figure 14(a), when the display screen of the electronic device is in the second state, the first area is in a screen-off state and the second area is in a screen-on state, and the display screen displays an image in the second area. In response to the user's first operation, the SOC stops sending the image frame corresponding to the second state to the DDIC and sends a screen-switching command to the DDIC. As described above, the screen-switching command includes a buffer area switching command and a display area switching command. Referring to Figure 14(b), the DDIC switches the image display area from the second area to the first and second areas according to the buffer area switching command, and buffers the display area switching command. When switching from the second state to the third state, the SOC does not need to instruct the DDIC to turn off the ESTV of a certain display area. Therefore, when the SOC stops sending the image frame corresponding to the second state to the DDIC, since the DDIC's GRAM still stores the image frame corresponding to the second state, as shown in Figure 14(b), the DDIC sends the image frame corresponding to the second state to the display screen, and the second area of ​​the display screen can still display the image frame corresponding to the second state. Referring to Figure 14(c), the SOC sends the first image frame corresponding to the third state to the DDIC, the DDIC triggers the buffered display area switching instruction to take effect, the DDIC sends the first switching instruction to the display screen, and the display screen switches to the third state according to the first switching instruction. The DDIC stores the received first image frame in the GRAM storage space corresponding to the first area and sends the first image frame to the display screen. At this time, the first image frame will cover the signal remaining in the capacitor in the circuit of the first area. Since ESTV1 has not been turned on at this time, the first area still does not display an image, while the second area still displays an image normally, such as the second area displaying the part of the image corresponding to the second area in the first image frame corresponding to the third state. Referring to (d) in Figure 14, after the SOC sends the first image frame for a preset duration, it sends an ESTV open command to the DDIC to instruct ESTV1 and ESTV2 to be turned on. The DDIC then sends a first screen-on command to the display screen, and the display screen controls the first and second areas to enter the screen-on state.Since the second area of ​​the display screen is already in the on state before receiving the first on-screen command sent by DDIC, after receiving the first on-screen command, the display screen controls the first area to enter the on-screen state and controls the second area to repeatedly enter the on-screen state. The display screen displays the image frame corresponding to the third state in the first and second areas. During the process of switching from the second state to the third state, the display screen can control the display screen to display the image with animation in the first area, as shown in (d) and (e) of Figure 14. The display screen can display the image in the first area with animation from right to left. The display screen can display a preset image in the area where the animation does not move. For example, the preset image can be a screenshot of the background image of the image frame corresponding to the first area, thereby providing the user with a display effect of the image expanding to the full screen.

[0182] Figure 15 is a schematic diagram of an electronic device switching from a third state to a second state according to an embodiment of this application. Referring to Figure 15, the user's first operation is used to instruct the electronic device to switch from the third state to the second state. Referring to Figure 15(a), when the display screen of the electronic device is in the third state, both the first area and the second area are in a bright state, and the display screen displays images in the first area and the second area. In response to the user's first operation, the SOC stops sending the image frame corresponding to the third state to the DDIC and sends a screen-switching command to the DDIC. As described above, the screen-switching command includes an ESTV1 shutdown command indicating the shutdown of ESTV1, a buffer area switching command, and a display area switching command. Referring to Figure 15(b), the DDIC generates a first screen-off command according to the ESTV1 shutdown command. The DDIC sends the first screen-off command to the display screen, and the display screen controls the first area to enter the screen-off state, while the second area displays normally. The DDIC switches the image display area from the first area and the second area to the second area according to the buffer area switching command and buffers the display area switching command. Referring to Figure 15(c), the SOC sends the first image frame corresponding to the second state to the DDIC. The DDIC triggers the cached display area switching instruction to take effect, and sends a first switching instruction to the display screen. The display screen switches to the second state according to the first switching instruction. The DDIC stores the received first image frame in the GRAM storage space corresponding to the second area and sends the first image frame corresponding to the second state to the display screen. Since the second area is in the on state, the display screen can display in the second area according to the received first image frame corresponding to the second state. Referring to Figure 15(d), after the SOC sends the first image frame for a preset duration, it sends an ESTV2 opening command to the DDIC to instruct the ESTV2 to be opened. The DDIC sends a first screen-on command to the display screen, and the display screen controls the second area to repeatedly enter the screen-on state and continue to display the image frame corresponding to the second state in the second area. After receiving the first screen-on command, the display screen can display the image in the second area in the form of animation, as shown in Figure 15(c), (d), and (e). The display screen can display the image with a left-to-right animation effect. The display screen can display a preset image in the area where the animation effect has not moved to, such as a screenshot of the background image of the image frame corresponding to the second area.

[0183] Figure 16 is a schematic flowchart of the fifth display state switching provided in this application embodiment. Referring to Figure 16, the user's first operation is used to instruct the electronic device to switch from the first state to the third state. Referring to Figure 16(a), when the display screen of the electronic device is in the first state, the second area is in a screen-off state, the first area is in a screen-on state, and the display screen displays an image in the first area. In response to the user's first operation, the SOC stops sending the image frame corresponding to the first state to the DDIC and sends a screen switching command to the DDIC. As described above, the screen switching command includes a buffer area switching command and a display area switching command. Referring to Figure 16(b), the DDIC switches the image display area from the first area to the second area according to the buffer area switching command and buffers the display area switching command. When switching from the first state to the third state, the SOC does not need to instruct the DDIC to turn off the ESTV of a certain display area, and the DDIC does not need to send a first screen-off command to the display screen. Therefore, when the SOC stops sending the image frame corresponding to the first state to the DDIC, since the DDIC's GRAM still stores the image frame corresponding to the first state, as shown in Figure 16(b), the DDIC sends the image frame corresponding to the first state to the display screen, and the first area of ​​the display screen can still display the image frame corresponding to the first state. Referring to Figure 16(c), the SOC sends the first image frame corresponding to the third state to the DDIC, the DDIC triggers the display area switching instruction in the buffer queue to take effect, the DDIC sends the first switching instruction to the display screen, and the display screen switches to the third state according to the first switching instruction. The DDIC stores the received first image frame in the GRAM storage space corresponding to the first and second areas, and sends the first image frame to the display screen. At this time, the first image frame will cover the signal remaining in the capacitor in the circuit of the second area. Since ESTV2 has not been turned on at this time, the second area still does not display an image, while the first area still displays an image normally, such as the first area displaying the part of the image corresponding to the first area in the first image frame corresponding to the third state. Referring to (d) in Figure 16, after the SOC sends the first image frame for a preset duration, it sends an ESTV-on command to the DDIC to instruct the ESTV1 and ESTV2 to be turned on. The DDIC then sends a first screen-on command to the display screen, which controls the first and second areas to enter the screen-on state. Since the first area is already in the screen-on state before the display screen receives the first screen-on command, the display screen controls the second area to enter the screen-on state after receiving the first screen-on command, and controls the first area to repeatedly enter the screen-on state.The display screen displays the image frame corresponding to the third state in the first and second areas. During the process of switching from the first state to the third state, the display screen can control the display of the image in the second area with animation, as shown in (d) and (e) of Figure 16. The display screen can display the image in the second area with animation from left to right. The display screen can display a preset image in the area where the animation does not move. For example, the preset image can be a screenshot of the background image of the image frame corresponding to the second area, thereby providing the user with a display effect of the image expanding to the full screen.

[0184] Figure 17 is a schematic diagram of an electronic device switching from a third state to a first state according to an embodiment of this application. Referring to Figure 17, the user's first operation is used to instruct the electronic device to switch from the third state to the first state. Referring to Figure 17(a), when the display screen of the electronic device is in the third state, both the first area and the second area are in a bright state, and the display screen displays images in the first area and the second area. In response to the user's first operation, the SOC stops sending the image frame corresponding to the third state to the DDIC and sends a screen-switching instruction to the DDIC. As described above, the screen-switching instruction includes an ESTV2 shutdown instruction indicating the shutdown of ESTV2, a buffer area switching instruction, and a display area switching instruction. Referring to Figure 17(b), the DDIC generates a first screen-off instruction according to the ESTV2 shutdown instruction, and sends the first screen-off instruction to the display screen. The display screen controls the second area to enter a screen-off state, while the first area displays normally. The DDIC switches the image display area from the first area and the second area to the first area according to the buffer area switching instruction, and adds the display area switching instruction to the buffer queue. Referring to Figure 17(c), the SOC sends the first image frame corresponding to the first state to the DDIC, triggering the cached display area switching instruction to take effect. The DDIC sends a first switching instruction to the display screen, and the display screen switches to the first state according to the first switching instruction. The DDIC stores the received first image frame in the GRAM storage space corresponding to the first area and sends the first image frame to the display screen. Since the first area is in the on-screen state, the display screen can display the first image frame in the first area after receiving it. Referring to Figure 17(d), after a preset time after sending the first image frame, the SOC sends an ESTV1 on instruction to the DDIC to indicate that ESTV1 should be turned on. The DDIC sends a first on-screen instruction to the display screen, and the display screen controls the first area to repeatedly enter the on-screen state, displaying the image frame corresponding to the first state in the first area. During the display state switching process, the display screen can display images in the switched display area in the form of animation, as shown in (d) and (e) of Figure 17. The display screen can display images with animation effects from left to right. The display screen can display preset images in areas where the animation effects have not moved to, such as a screenshot of the background image of the image frame corresponding to the first area.

[0185] In some embodiments of this application, referring to the system architecture shown in Figure 4, the display method provided in this application embodiment may include the following process: The folding state sensor manager acquires the folding parameters of the electronic device and sends the acquired folding parameters to the folding screen management service. The folding screen management service determines the folding state of the electronic device and the size information of the bright screen area corresponding to the folding state based on the folding parameters. The folding screen management service sends the determined folding state and the size information of the bright screen area to the WMS. The WMS stops sending and displaying the image frame corresponding to the first display state, and the WMS calculates the position information of the application icon or other controls on the bright screen area, and determines the configuration parameters related to the animation when displaying the image frame in the first display area. The DMS determines the size information of the bright screen area corresponding to the second display state, and the DMS sends screen switching instruction information to the SF. The screen switching instruction information is used to indicate that the display area of ​​the electronic device switches from the first display area to the second display area, wherein the first display area is the bright screen area corresponding to the first display state, and the second display area is the bright screen area corresponding to the second display state. The SF sends screen-switching instruction information to the DKMD via HWC and HDM. Upon receiving the screen-switching instruction, the DKMD's DACC sends a first light-emitting enable signal turn-off command to the DDIC. The DDIC generates a first screen-off command based on this command and sends it to the display screen. The display screen then controls the screen-off area corresponding to the second display state to enter the screen-off state based on the first screen-off command. The DACC sends a buffer area switching command and a display area switching command to the DDIC. The DDIC switches the image display area from the first display area to the second display area based on the buffer area switching command, and also buffers the display area switching command. The SF draws the first image frame corresponding to the second display state and sends it to the DDIC via HWC, HDM, and DKMD. Upon receiving the image frame corresponding to the second display state, the DDIC triggers the buffered display area switching command to take effect, and sends a first switching command to the display screen. The DDIC writes the first image frame corresponding to the second display state into the storage space corresponding to the second display area in the GRAM, and reads the first image frame corresponding to the second display state from the GRAM and sends it to the display screen. The display screen switches to the second display state according to the first switching instruction and receives the first image frame corresponding to the second display state sent by the DDIC. The DACC sends a second light-emitting enable signal to the DDIC, and the DDIC generates a first screen-on instruction according to the second light-emitting enable signal. The DDIC sends the first screen-on instruction to the display screen, and the display screen controls the second display area to enter the screen-on state according to the first screen-on instruction, displaying the first image frame corresponding to the second display state in the second display area.SF draws the second frame image corresponding to the second display state and sends the drawn second frame image to DDIC through HWC, HDM, and DKMD. DDIC writes the second frame image corresponding to the second display state into the storage space corresponding to the second display area in GRAM and reads the second frame image corresponding to the second display state from GRAM and sends it to the display screen. The display screen displays the second frame image corresponding to the second display state in the second display area.

[0186] In some embodiments of this application, after the electronic device detects the user's first operation, before sending the first switching command to the DDIC, the SOC sends a second image frame to the DDIC. The second image frame is the last image frame displayed in the first display state. When the first display area and the second display area are non-overlapping display areas, the second image frame is a black image frame; when the first display area includes the second display area and the first sub-area, the image corresponding to the first sub-area in the second image frame is a black image. The DDIC sends the second image frame to the display screen, and the display screen displays the second image frame in the first display area. In this embodiment, the last image frame displayed in the first display state sent by the SOC to the DDIC can be a black image frame. After receiving the image frame, the DDIC can store the black image frame in the GRAM storage space corresponding to the first display area, and read the black image frame from the GRAM and send it to the display screen. The display screen displays the black image frame in the first display area, and the signal stored in the capacitor in the circuit of the first display area is the image signal corresponding to the black image frame. In this way, when the electronic device switches its display state to the first display area for the next time, even if the first display area switches from the off state to the on state and the CST discharges when the circuit is turned on, the first display area will still display a black image frame, and there will be no abnormal display problem of flashing back to the image displayed when the second display area was on last time.

[0187] In some implementations, when the electronic device switches to the first display area for the next display state, the display screen can also dynamically display the image frame corresponding to the switched display state sent by DDIC after displaying a black image frame, thereby providing users with a more comfortable viewing experience.

[0188] In this embodiment of the application, the aforementioned black image frame may be on a different layer than the image frame displayed on the display screen in different display states, such as the black image frame being located on a black layer.

[0189] As previously described, when the first and second display areas do not overlap, or when the first display area includes the second display area, the second image frame generated by the SOC is different. The position and size of the black image in the second image frame are related to the first display area. Taking the switching between display states shown in Figure 5 as an example, when the electronic device switches from the first state to the second state, the second image frame is a black image with the same position and size as the first area; when the electronic device switches from the second state to the first state, the second image frame is a black image with the same position and size as the second area; when the electronic device switches from the third state to the first state, the image corresponding to the second area in the second image frame is a black image, and the image corresponding to the first area in the second image frame is a screenshot of the position corresponding to the first area in the image displayed in the third state. When the electronic device switches from the third state to the second state, the image corresponding to the first area in the second image frame is a black image, and the image corresponding to the second area in the second image frame is a screenshot of the position corresponding to the second area in the image displayed in the third state. For switching from the first state to the third state and from the second state to the third state, no second image frame needs to be generated.

[0190] Figure 18 is a schematic diagram of a display state switching according to an embodiment of this application. Referring to Figure 18, a user's first operation is used to instruct the electronic device to switch from a first state to a second state. Referring to Figure 18(a), when the display screen of the electronic device is in the first state, the first area is in a bright state and the second area is in a dark state, and the display screen displays an image in the first area. In response to the user triggering an operation, the SOC generates a black image frame corresponding to the first area and sends the black image frame to the DDIC. The DDIC stores the black image frame in the GRAM storage space corresponding to the first area, and reads the black image frame from the GRAM and sends it to the display screen, as shown in Figure 18(b), where the display screen displays a black image frame in the first area. The SOC stops sending the image frame corresponding to the first state to the DDIC and sends a screen switching command to the DDIC. The screen switching command includes a buffer area switching command and a display area switching command. The DDIC switches the image display area according to the screen switching command and triggers the display area switching command to take effect. The DDIC sends a switching command to the display screen, and the display screen switches to the second state, where the display screen displays in the second area. Based on the solution provided in this embodiment, if the CST of the circuit corresponding to the second region contains the image signal corresponding to the black image frame, then referring to (c) in Figure 18, the display screen displays the black image frame in the second region. The SOC sends the image frame corresponding to the second state to the DDIC. The DDIC stores the image frame corresponding to the second state in the GRAM storage space corresponding to the second region, and reads the image frame from the GRAM and sends it to the display screen. The display screen displays the image frame corresponding to the second state in the second region. For example, referring to (d) and (e) in Figure 18, the display screen can display the image frame corresponding to the second state with a left-to-right animation.

[0191] Furthermore, when the user triggers a third operation, this third operation instructs the electronic device to switch from the second state to the first state. In response to the user's third operation, the SOC generates a black image frame corresponding to the second region and sends the black image frame to the DDIC. The DDIC stores the black image frame in the GRAM storage space corresponding to the second region, and then reads the black image frame from the GRAM and sends it to the display screen, as shown in Figure 18(f). The display screen displays the black image frame in the second region. The SOC stops sending the image frame corresponding to the second state to the DDIC and sends a screen-switching command to the DDIC. This screen-switching command includes a buffer area switching command and a display area switching command. The DDIC switches the GRAM display area according to the screen-switching command and triggers the display area switching command to take effect. The DDIC sends a switching command to the display screen, and the display screen switches to the first state. The display screen displays in the first area. As mentioned above, when the user triggers the electronic device to switch from the first state to the second state, the DDIC stores the black image frame corresponding to the first area sent by the SOC into the GRAM corresponding to the first area, and the CST of the circuit corresponding to the first area contains the image signal corresponding to the black image frame. Then, referring to Figure 18(g), after the display screen switches to the first state, the first area displays a black image frame. The SOC sends the image frame corresponding to the first state to the DDIC. The DDIC stores the image frame corresponding to the first state into the GRAM storage space corresponding to the first area, and reads the image frame from the GRAM and sends it to the display screen. The display screen displays the image frame corresponding to the first state in the first area. For example, referring to Figure 18(h) and (i), the display screen can display the image frame corresponding to the first state with a left-to-right animation.

[0192] Figure 19 is a waveform example diagram of a display provided in an embodiment of this application. Referring to Figure 19, taking the example of a user triggering an electronic device to switch from a first state to a second state, and then triggering the electronic device to switch from the second state back to the first state, as shown in Figure 19, in response to the user's first operation, the first operation is used to instruct the electronic device to switch from the first state to the second state. The SOC sends the last image frame corresponding to the first state to the DDIC, which is a black image frame. The DDIC sends a black image frame to the display screen, and the last image frame displayed on the display screen in the first state is a black image frame. The SOC stops sending the image frame corresponding to the first state to the DDIC and sends a screen switching command to the DDIC. The screen switching command includes a buffer area switching command and a display area switching command. The DDIC switches the image display area according to the screen switching command and triggers the display area switching command to take effect. The DDIC sends a switching command to the display screen, and the display screen switches to the second state according to the switching command. Since the CST of the circuit corresponding to the second area contains the image signal corresponding to the black image frame, after the display screen switches to the second state, the display screen displays a black image frame in the second area. Referring to Figure 19, when the DDIC receives the self-refresh command from the SOC, the DDIC sends the black image frame from the memory space corresponding to the second region in the GRAM to the display screen, and the display screen displays the black image frame corresponding to the second state in the second region. The SOC sends the image frame corresponding to the second state to the DDIC, and the DDIC sends the image frame corresponding to the second state to the display screen, as shown in Figure 19, where the display screen displays the normal image frame of the second state in the second region.

[0193] The user triggers a third operation, which instructs the electronic device to switch from the second state to the first state. The last image frame corresponding to the second state sent by the SOC to the DDIC is a black image frame. The DDIC sends a black image frame to the display screen, and the last image frame displayed on the display screen in the second state is a black image frame. The SOC stops sending the image frame corresponding to the second state to the DDIC and sends a screen-switching command to the DDIC. This screen-switching command includes a buffer area switching command and a display area switching command. The DDIC switches the image display area according to the screen-switching command and triggers the display area switching command to take effect. The DDIC sends a switching command to the display screen, and the display screen switches to the first state according to the switching command. Since the CST of the circuit corresponding to the first area contains the image signal corresponding to the black image frame, the display screen displays a black image frame in the first area. Referring to Figure 19, at this time, the DDIC receives a self-refresh command sent by the SOC. The DDIC then sends the black image frame from the storage space corresponding to the first area in the GRAM to the display screen. This black image frame is the one that the DDIC stored in the GRAM after the SOC sent it to the DDIC when switching from the first state to the second state last time. The display screen displays the black image frame corresponding to the first state in the first area. The SOC sends the image frame corresponding to the first state to the DDIC, and the DDIC displays the image frame corresponding to the first state in the first area, as shown in Figure 19, where the first area displays the normal image frame of the first state.

[0194] In some embodiments of this application, after the electronic device detects the user's first operation, before sending the first buffer area switching instruction to the DDIC, the SOC sends a second reset instruction to the DDIC. The second reset instruction instructs the first capacitor used to store image signals in the circuitry of the display area outside the first display area in the second display area to be reset. After generating a first reset instruction based on the second reset instruction, the DDIC sends the first reset instruction to the display screen, and the display screen resets the first capacitor according to the first reset instruction.

[0195] In some implementations, the SOC can instruct the DDIC to turn on the NSTV and PSTV corresponding to the display area requiring capacitor reset, discharging the capacitors in the circuit of the display area requiring capacitor reset, thereby clearing the residual image signal in the capacitors. For example, taking the circuit structure shown in Figure 8 as an example, the DDIC can instruct the display control to turn on T1 and T2, allowing the CST to discharge via T2 and T1. After the display resets the capacitors in the circuit of the second display area, the SOC can also instruct the DDIC to turn off the NSTV and PSTV corresponding to the second display area. The DDIC can instruct the display control to turn off the NSTV and PSTV corresponding to the second display area. The SOC sends a screen switching command to the DDIC, which may include a buffer area switching command and a display area switching command. The DDIC sends a first switching command to the display, and the display switches to the second display state according to the first switching command. The SOC sends a first image frame to the DDIC, which stores the first image frame in the storage space corresponding to the second display area in the GRAM, and reads the first image frame from the GRAM and sends it to the display, allowing the display to display the first image frame in the second display area. In this way, when an electronic device switches between different display states, the capacitors storing image signals in the circuit of the display area corresponding to the switched display state can be reset in advance, thereby preventing abnormal display problems caused by capacitor discharge when the circuit of the display area is turned on during the screen switching process.

[0196] In some implementations, the first reset command sent by the DDIC to the display screen is used to instruct the capacitors in the circuits of the display areas other than the first display area in the second display region corresponding to the second display state to be reset. The display areas other than the first display area in the second display region are the display areas requiring capacitor reset, and these areas are related to the first display state before the switch. Taking the display states shown in Figure 5 as an example, when the first display state is the first state, the display area requiring capacitor reset during the display state switch is the second region; when the first display state changes to the second state, the display area requiring capacitor reset during the display state switch is the first region. When the electronic device switches from the first state to the second state, the display area requiring capacitor reset is the second region; when the electronic device switches from the second state to the first state, the display area requiring capacitor reset is the first region; when the electronic device switches from the first state to the third state, the display area requiring capacitor reset is the second region; when the electronic device switches from the second state to the third state, the display area requiring capacitor reset is the first region; when the electronic device switches from the third state to the first state or from the third state to the second state, no capacitor reset is required.

[0197] The display method provided in this application embodiment can also be used during the power-on display process of an electronic device. In this application embodiment, the display screen of the electronic device is in a first state of off-screen state. In response to the user's second operation, the display screen is powered on. The display screen turns off the light-emitting enable signal of the off-screen area corresponding to the first state and controls the display area corresponding to the first state to enter the on-screen state. The display screen displays the third image frame sent by the display driver chip in the display area corresponding to the first state. The second operation is used to wake up the display screen. The first state can be any display state supported by the electronic device. For example, the first state can be any of the first, second, and third states shown in Figure 5. The off-screen state of the first state can be understood as the display screen is currently in the folded state corresponding to the first state and the display screen is not lit; or the first state can be any of the first, second, or third device states shown in Figure 5. In this way, during the power-on process, the display screen can control the off-screen area corresponding to the first state to enter the off-screen state and control the display area corresponding to the first state to enter the on-screen state, so as to ensure that the display screen can display in the first state woken up by the user, and the display driver chip can send the correct image frame corresponding to the display state to the display screen, so that the display screen can correctly display the image in the display state woken up by the user.

[0198] In some implementations, when the first state is as shown in Figure 5, in response to the user's second operation, the electronic device powers on the display screen. The display screen can turn off the light-emitting enable signal of the second area to put the second area into a screen-off state, and the display screen can control the first area to enter a screen-on state. The display screen receives the third image frame sent by the DDIC and displays the third image frame in the first area, thereby realizing power-on in the first state.

[0199] When the first state is the second state shown in Figure 5, in response to the user's second operation, the electronic device powers on the display screen. The display screen can turn off the light-emitting enable signal of the first area to put the first area in a screen-off state, and the display screen can control the second area to enter a screen-on state. The display screen receives the third image frame sent by the DDIC and displays the third image frame in the second area, thereby realizing power-on in the second state.

[0200] When the first state is the third state shown in Figure 5, in response to the user's second operation, the electronic device powers on the display screen. Since all areas of the display screen are displayed in the third state, the display screen can control the first and second areas to enter the on-screen state. The display screen receives the third image frame sent by the DDIC and displays the third image frame in the first and second areas, thereby realizing power-on in the third state.

[0201] In some implementations, before sending the third image frame to the display screen, the DDIC can also send a black image frame to the display screen. After receiving the black image frame sent by the DDIC, the display screen can display the black image frame in the display area corresponding to the first state, thereby preventing abnormal display problems caused by the image data remaining in the image memory being refreshed to the display screen during the initial power-on period.

[0202] In other embodiments of this application, when the display screen of the electronic device is in a screen-off state (first state), in response to a second user operation, the display screen powers on in a default display state. The display screen receives a second switching instruction sent by the display driver chip, which instructs the display screen to switch from the default display state to the first state. The display screen switches from the default display state to the first state according to the second switching instruction. The display screen displays a third image frame sent by the display driver chip in the display area corresponding to the first state. The second operation is used to wake up the display screen. The first state can be any display state supported by the electronic device, such as any one of the first, second, and third states shown in Figure 5. The screen being in a screen-off state (first state) can be understood as the display screen currently being in a folded state corresponding to the first state, and the display screen is not lit. In this way, when the electronic device is preset to power on in the default display state, the DDIC can instruct the display screen to switch from the default display state to the correct display state, ensuring that the display is performed in the user-wake-up state.

[0203] In response to a second user operation, the SOC can send a second switching instruction to the DDIC, which instructs the DDIC to switch the display screen from a default display state to a first state. The second switching instruction sent by the DDIC to the display screen is the same as the second switching instruction sent by the SOC to the DDIC; alternatively, the second switching instruction sent by the DDIC to the display screen is generated by the DDIC based on the second switching instruction sent by the SOC to the DDIC. For example, the second switching instruction sent by the SOC to the DDIC can be a second display area switching instruction, which instructs the DDIC on its operating parameters when the display screen is in the first state. The DDIC can generate a second switching instruction based on the second display area switching instruction and send it to the display screen to instruct the display screen to switch from the default display state to the first state. For ease of description, the following embodiments will use the example of a second display area switching instruction sent by the SOC to the DDIC.

[0204] In some embodiments of this application, in response to a second user operation, the SOC can send a second buffer area switching instruction to the DDIC. This instruction instructs the display driver chip to set the image display area to the display area corresponding to the first state. The DDIC then switches the image display area to the display area corresponding to the first state according to the second buffer area switching instruction. After sending the second buffer area switching instruction to the DDIC, the SOC sends a second display area switching instruction to the DDIC. This instruction instructs the DDIC on its operating parameters when the display screen is in the first state, and the DDIC caches the second display area switching instruction. The SOC sends a third image frame to the DDIC. Upon receiving the third image frame, the DDIC triggers the cached second display area switching instruction to take effect, generates a second switching instruction based on the second display area switching instruction, and sends the second switching instruction to the display screen. The display screen then switches from the default display state to the first state according to the second switching instruction. The SOC sends the third image frame to the DDIC, which stores the third image frame in the storage space corresponding to the third display area in the GRAM. After reading the third image frame from the GRAM, the DDIC sends the third image frame to the display screen, allowing the display screen to display the third image frame in the third display area.

[0205] In some embodiments of this application, before sending the third image frame to the display screen, the DDIC can send a black image frame to the display screen. The display screen can then display the black image frame in the display area corresponding to the first state, thereby preventing abnormal display problems caused by residual image data in the image memory being refreshed to the display screen during the initial power-on period.

[0206] In some scenarios, when an electronic device powers on, the first N frames of images sent by the DDIC to the display screen can be black image frames, where N is a positive integer. This prevents residual image data in the GRAM from being refreshed to the display screen during the initial power-on phase, thus avoiding abnormal display. In this scenario, if the user triggers power-on in the first state, the SOC can send a third light-emitting enable signal shutdown command, a second buffer area switching command, and a second display area switching command to the DDIC. The third light-emitting enable signal shutdown command indicates that the light-emitting enable signal corresponding to the screen-off area in the first state should be shut down. After receiving the third light-emitting enable signal shutdown command, the DDIC can generate a second screen-off command based on it. The DDIC sends the second screen-off command to the display screen, and the display screen controls the screen-off area corresponding to the first state to enter the screen-off state. The DDIC switches the image display area from the bright screen area corresponding to the default display state to the third display area according to the second buffer area switching command, and the DDIC buffers the second display area switching command. The SOC sends a fourth light-emitting enable signal to the DDIC, instructing it to enable the light-emitting signal corresponding to the third display area. Upon receiving this command, the DDIC generates a second screen-on command and sends it to the display screen. The display screen then controls the third display area to enter the screen-on state. Since the first N frames sent by the DDIC to the display screen during initial power-on are black frames, the display screen will show black frames in the third display area without any abnormal display issues. The SOC then sends the first frame corresponding to the first state to the DDIC. Upon receiving this first frame, the DDIC triggers the cached second display area switching command, sending a second switching command to the display screen and switching to the first state. The DDIC stores the first frame in the GRAM corresponding to the third display area, reads the third frame from the GRAM, and sends it to the display screen, allowing the display screen to show the third frame in the third display area. In this way, when a user triggers the electronic device to power on in a non-default power-on state, the SOC can send a screen-switching command to the DDIC to instruct the DDIC to display in the correct display state, thus ensuring the display effect when powered on.

[0207] Figure 20 is a waveform example diagram of a display provided in an embodiment of this application. Referring to Figure 20, taking the user waking up the electronic device in the first state shown in Figure 5 as an example, it is assumed that the default power-on state of the electronic device is the third state. Referring to Figure 20, after the user wakes up the electronic device, the SOC sends a power-on command to the DDIC. After receiving the power-on command, the DDIC powers on the display screen in the default third state. Referring to Figure 20, in the initial stage of power-on, the ESTV signals corresponding to the first and second regions are both turned on, and the first N frames of image frames displayed on the display screen are black image frames, thereby preventing the image data remaining in the GRAM from being refreshed to the display screen during the initial power-on process, which would cause display abnormalities. The SOC sends an ESTV2 shutdown command, a second buffer area switching command, and a second display area switching command to the DDIC. The DDIC generates a second screen-off command according to the ESTV2 shutdown command and sends the second screen-off command to the display screen, which controls the second region to enter the screen-off state. The DDIC switches the image display area from the first and second regions to the first region according to the second buffer area switching command. The DDIC buffers the second display area switching command. The SOC sends an ESTV1 enable command to the DDIC, which repeatedly enables the ESTV1 signal corresponding to the first area and sends a second screen-on command to the display. The display controls the first area to repeatedly enter the screen-on state according to the second screen-on command. The SOC sends the image frame corresponding to the first state to the DDIC, which triggers the buffered second display area switching command to take effect. The DDIC sends a second switching command to the display, which switches to the first state according to the second switching command. The DDIC sends the image frame corresponding to the first state to the display, and the display shows the image frame corresponding to the first state in the first area.

[0208] Figure 21 is a schematic diagram of a power-on process provided in an embodiment of this application. Figure 21 illustrates an example where the default display state of the electronic device is the third state, and the user triggers power-on in the first state. Referring to Figure 21(a), when the user triggers power-on of the electronic device in the first state, the first N frames of images sent by the DDIC in the electronic device to the display screen can be black image frames. Therefore, the electronic device first displays black image frames in the third display area corresponding to the third state. The SOC sends an ESTV2 shutdown command, a second buffer area switching command, and a second display area switching command to the DDIC. The DDIC sends a second screen-off command to the display screen according to the ESTV2 shutdown command. Referring to Figure 21(b), the display screen controls the second area to enter the screen-off state according to the second screen-off command. The DDIC switches the image display area from the first area and the second area back to the first area according to the second buffer area switching command. At this time, the first area is in a bright state, so the display screen continues to display black image frames in the first area. The SOC sends an ESTV1 on command to the DDIC. The DDIC then sends a second on command to the display screen based on the ESTV1 on command. The display screen, according to the second on command, controls the first area to repeatedly enter the on state, as shown in Figure 21(c). At this time, the first area still displays a black image frame. The SOC sends the image frame corresponding to the first state to the DDIC. The DDIC triggers the cached second display area switching command and sends a second switching command to the display screen. The display screen switches to the first state according to the second switching command. The DDIC sends the image frame corresponding to the first state to the display screen, as shown in Figure 21(d). The display screen displays the image in the first area based on the received image frame corresponding to the first state.

[0209] In some embodiments of this application, referring to the system architecture shown in Figure 4, the display method provided in this application embodiment may include the following process: In response to a user's wake-up operation, the folding state sensor manager acquires the folding parameters of the electronic device when the user triggers the electronic device to power on, and sends the acquired folding parameters to the folding screen management service. The folding screen management service determines the folding state of the electronic device and the size information of the bright screen area corresponding to the folding state based on the folding parameters. The folding screen management service sends the determined folding state and the size information of the bright screen area to the WMS. The WMS calculates the position information of the application icon or other controls on the bright screen area, and determines the configuration parameters related to the animation when displaying an image frame in the third display area corresponding to the first state. The WMS sends the size information of the third display area to the DMS, and the DMS sends the size information of the third display area to the SF. The SF instructs the DKMD to power on the electronic device in the first state through HWC and HDM. The DKMD executes the power-on initialization process corresponding to the first state, and the DKMD instructs the LCD KIT and DDIC to power on in the first state. DKMD sequentially sends a third light-emitting enable signal to turn off, a second buffer area switching command, and a second display area switching command to DDIC. DDIC generates a second screen-off command based on the third light-emitting enable signal to turn off, and sends this command to the display screen. DDIC then controls the screen-off area corresponding to the first state to enter the screen-off state. DDIC sets the image display area to the third display area based on the second buffer area switching command, and also buffers the second display area switching command. DKMD sends a fourth light-emitting enable signal to turn on, and DDIC generates a second screen-on command based on this command. DDIC then sends this command to the display screen, and the display screen controls the third display area to enter the screen-on state. SF draws the image frame corresponding to the first state and sends the drawn image frame to DDIC via HWC, HDM, and DKMD. Upon receiving the image frame corresponding to the first state, DDIC triggers the buffered second display area switching command to take effect. DDIC then sends a second switching command to the display screen, and the display screen switches to the first state based on the second switching command. DDIC writes the image frame corresponding to the first state into GRAM, reads the image frame corresponding to the first state from GRAM and sends it to the display screen, and the display screen displays the image frame corresponding to the first state in the third display area.

[0210] This application also provides a display method, which can be executed by a display module in an electronic device. The display module may include a display driver chip and a display screen. Figure 22 is a flowchart illustrating a display method provided in this application. Referring to Figure 22, the method includes the following steps:

[0211] S2201: When the display screen is in the first display state, the display driver chip sends a first switching command to the display screen.

[0212] The first switching instruction is used to instruct the display screen to switch from a first display state to a second display state. The first display state is to display in the first display area, and the second display state is to display in the second display area.

[0213] 2202: The display driver chip sends the first image frame to the display screen.

[0214] The first image frame is the image frame displayed in the second display state.

[0215] S2203: The display screen switches from the first display state to the second display state according to the first switching instruction, and displays the first image frame in the second display area.

[0216] The display method shown in Figure 22 of this application can be referred to in the above embodiments of this application in specific implementation, and repeated parts will not be described again.

[0217] To achieve the functions of the electronic devices in the above embodiments, the electronic devices include hardware and / or software structures corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and method steps described in conjunction with the embodiments disclosed in this application, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0218] Figure 23 is a structural example diagram of a display device 2300 provided in an embodiment of this application. Referring to Figure 23, the display device 2300 may include a display unit 2301 and a display driving unit 2302. In some examples, the display device 2300 may also include a processing unit 2303.

[0219] In one embodiment, the display device 2300 can be used to implement the method executed by the electronic device in the above embodiments. The display device 2300 can be the electronic device itself, or a chip or chipset in the electronic device, or a part of the chip used to execute the relevant method function. Specifically, the display unit 2301 can be used to implement the steps executed by the display screen in the electronic device in the above embodiments, the display driver unit 2302 can be used to implement the steps executed by the display driver chip in the electronic device in the above embodiments, and the processing unit 2303 can be used to implement the steps executed by the system-on-a-chip in the electronic device in the above embodiments.

[0220] In some embodiments, the display unit 2301 is configured to, while in a first display state, receive a first switching instruction sent by the display driving unit 2302, the first switching instruction instructing the display unit 2301 to switch from the first display state to a second display state, wherein the first display state is for display in a first display area and the second display state is for display in a second display area; receive a first image frame sent by the display driving unit 2302, and switch from the first display state to the second display state according to the first switching instruction, wherein the first image frame is an image frame displayed in the second display state; and display the first image frame in the second display area.

[0221] The display driving unit 2302 is used to send the first switching command to the display screen and send the first image frame to the display screen.

[0222] The division of units (functional modules) in this embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the units in the various embodiments of this application can be integrated into a single processor, exist as separate physical entities, or two or more units can be integrated into a single module. The integrated units can be implemented in hardware or as software functional modules. The functions or implementations of the units in this embodiment can be further described in the relevant descriptions of the method embodiments.

[0223] Figure 24 is a structural example diagram of an electronic device provided in an embodiment of this application. This electronic device can be used to implement the functions of the electronic device in the above embodiment, and thus can also achieve the beneficial effects of the above embodiment.

[0224] Referring to Figure 24, the device 2400 may include a processor 2401, a memory 2402, and a communication interface 2403. The processor 2401, memory 2402, and communication interface 2403 are coupled to each other. Optionally, the memory 2402 may be used to store instructions executed by the processor 2401, or to store input data required by the processor 2401 to execute instructions, or to store data generated after the processor 2401 executes instructions. The communication interface 2403 may be a transceiver or an input / output interface.

[0225] Optionally, referring to Figure 24, the processor 2401, the memory 2402, and the communication interface 2403 are interconnected via a bus 2404. The bus 2404 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is used in Figure 24, but this does not indicate that there is only one bus or one type of bus.

[0226] The processor 2401 can be used to implement the processing functions of the electronic device in the above embodiments. For example, the processor 2401 can be used to execute the steps performed by the system-on-a-chip and / or display driver chip in the above electronic device. The communication interface 2403 can be used to implement the transmission and reception functions of the electronic device.

[0227] The processor 2401 in the embodiments of this application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor.

[0228] The memory 2402 in Figure 24 of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. It should be noted that the memory in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0229] Based on the above embodiments, this application also provides a computer program product containing instructions, which, when run on a computer, causes the computer to execute the methods described in the embodiments of this application.

[0230] Based on the above embodiments, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a computer, causes the computer to perform the methods described in the embodiments of this application.

[0231] Based on the above embodiments, this application also provides a chip for reading computer programs stored in a memory to implement the methods described in the embodiments of this application.

[0232] Based on the above embodiments, this application provides a chip system including a processor for supporting a computer device in implementing the methods described in the embodiments of this application. In one possible implementation, the chip system further includes a memory for storing necessary programs and data of the computer device. This chip system may be composed of chips or may include chips and other discrete devices.

[0233] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0234] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more blocks of the flowchart illustrations and / or one or more blocks of the block diagrams.

[0235] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0236] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0237] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of protection of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A display module, characterized in that, The display module includes a display driver chip and a display screen, and the display screen includes a first display area and a second display area; The display screen is configured to, when in a first display state, receive a first switching instruction sent by the display driver chip, the first switching instruction instructing the display screen to switch from the first display state to a second display state, wherein the first display state is for display in a first display area and the second display state is for display in a second display area; receive a first image frame sent by the display driver chip, and switch from the first display state to the second display state according to the first switching instruction, wherein the first image frame is an image frame displayed in the second display state; The first image frame is displayed in the second display area; The display driver chip is used to send the first switching command to the display screen and send the first image frame to the display screen.

2. The display module as described in claim 1, characterized in that, The display driver chip is further configured to send a first screen-off command to the display screen before sending the first switching command to the display screen; The display screen is also used to receive the first screen-off command sent by the display driver chip, and control the screen-off area corresponding to the second display state to enter the screen-off state according to the first screen-off command.

3. The display module as described in claim 1 or 2, characterized in that, The display driver chip is further configured to send a first screen-on command to the display screen after sending the first image frame to the display screen; The display screen is further configured to receive the first screen-on command sent by the display driver chip before displaying the first image frame in the second display area, and control the second display area to enter the screen-on state according to the first screen-on command.

4. The display module as described in claim 2 or 3, characterized in that, When the second display area includes the first display area, the first display area remains on when the display screen switches from the first display state to the second display state; or, when the first display area includes the second display area, the second display area remains on when the display screen switches from the first display state to the second display state.

5. The display module as described in claim 1, characterized in that, The display screen is further configured to receive a first reset instruction sent by the display driver chip before receiving the first switching instruction sent by the display driver chip. The first reset instruction is configured to instruct the first capacitor used for storing image signals in the circuit of the display area outside the first display area in the second display area to be reset; and to reset the first capacitor according to the first reset instruction. The display driver chip is also used to send the first reset command to the display screen.

6. The display module as described in claim 1, characterized in that, The first display area and the second display area are non-overlapping display areas. The display screen is further configured to receive a second image frame sent by the display driver chip before receiving the first switching instruction sent by the display driver chip, wherein the second image frame is the last image frame displayed in the first display state and the second image frame is a black image; and display the second image frame in the first display area; The display driver chip is further configured to send the second image frame to the display screen before sending the first switching instruction to the display screen.

7. The display module as described in claim 1, characterized in that, The first display area includes the second display area and the first sub-area; The display screen is also configured to receive a second image frame sent by the display driver chip before receiving the first switching instruction sent by the display driver chip. The second image frame is the last image frame displayed in the first display state, and the image corresponding to the first sub-region in the second image frame is a black image. The display driver chip is further configured to: send the second image frame to the display screen before sending the first switching instruction to the display screen.

8. An electronic device, characterized in that, The electronic device includes a system-on-a-chip and a display module as described in any one of claims 1-7; The system-on-a-chip is used to send a first switching instruction to the display driver chip in response to a first operation by the user. The first switching instruction is used to instruct the display driver chip to control the display screen to switch from the first display state to the second display state. It is also used to send the first image frame to the display driver chip; The display driver chip is configured to receive the first switching instruction sent by the system-on-a-chip and the first image frame sent by the system-on-a-chip.

9. The electronic device as claimed in claim 8, characterized in that, The system-on-a-chip is also used to stop sending the image frame of the first display state to the display driver chip, and to send a first buffer area switching instruction to the display driver chip. The first buffer area switching instruction is used to instruct the display driver chip to set the image display area to the second display area. The display driver chip is further configured to receive the first cache area switching instruction sent by the system-on-a-chip, and switch the image display area to the second display area according to the first cache area switching instruction.

10. The electronic device as claimed in claim 8 or 9, characterized in that, The system-on-a-chip is also used to send a first light-emitting enable signal turn-off instruction to the display driver chip. The first light-emitting enable signal turn-off instruction is used to instruct the display driver chip to turn off the light-emitting enable signal corresponding to the screen-off area in the second display state. The display driver chip is further configured to receive the first light-emitting enable signal turn-off instruction sent by the system-on-a-chip, and generate a first screen-off instruction according to the first light-emitting enable signal turn-off instruction. The first screen-off instruction is used to instruct the display screen to adjust the screen-off area corresponding to the second display state to the screen-off state.

11. The electronic device according to any one of claims 8-10, characterized in that, The system-on-a-chip is also used to send a second light-emitting enable signal turn-on instruction to the display driver chip, the second light-emitting enable signal turn-on instruction being used to instruct the display driver chip to turn on the light-emitting enable signal corresponding to the second display area; The display driver chip is further configured to receive the second light-emitting enable signal turn-on instruction sent by the system-on-chip, and generate a first screen-on instruction according to the second light-emitting enable signal turn-on instruction. The first screen-on instruction is used to instruct the display screen to adjust the second display area to a screen-on state.

12. The electronic device as claimed in claim 8 or 9, characterized in that, The system-on-a-chip is also used to send a second reset instruction to the display driver chip. The second reset instruction is used to instruct the first capacitor used for storing image signals in the circuit of the display area outside the first display area in the second display area to be reset. The display driver chip is further configured to receive the second reset instruction sent by the system-on-a-chip, and generate a first reset instruction based on the second reset instruction. The first reset instruction is used to instruct the display screen to reset the first capacitor.

13. The electronic device as claimed in claim 8 or 9, characterized in that, The first display area and the second display area are non-overlapping display areas; The system-on-a-chip is also used to send a second image frame to the display driver chip. The second image frame is the last image frame displayed in the first display state, and the second image frame is a black image. The display driver chip is also used to receive the second image frame sent by the system-on-a-chip.

14. The electronic device as claimed in claim 8 or 9, characterized in that, The first display area includes the second display area and the first sub-area; The system-on-a-chip is also used to send a second image frame to the display driver chip. The second image frame is the last image frame displayed in the first display state, and the image corresponding to the first sub-region in the second image frame is a black image. The display driver chip is also used to receive the second image frame sent by the system-on-a-chip.

15. A display module, characterized in that, The display module includes a display driver chip and a display screen; The display screen is in a first state of screen off. In response to a second operation by the user, the second operation is used to wake up the display screen, power on the display screen, turn off the light-emitting enable signal of the screen off area corresponding to the first state, and control the display area corresponding to the first state to enter the screen on state, and display the third image frame sent by the display driver chip in the display area corresponding to the first state. The display driver chip is used to send the third image frame to the display screen.

16. The display module as described in claim 15, characterized in that, The display screen includes a first area and a second area. The first state includes a first state, a second state, or a third state, wherein the first state is to display in the first area, the second state is to display in the second area, and the third state is to display in the entire area of ​​the display screen.

17. An electronic device, characterized in that, The electronic device includes a system-on-a-chip and a display module as described in claim 15 or 16; The system-on-a-chip is used to send the third image frame to the display driver chip, wherein the third image frame is an image frame displayed by the display screen in the display area corresponding to the first state; The display driver chip is used to receive the third image frame sent by the system-on-a-chip.

18. A display module, characterized in that, The display module includes a display driver chip and a display screen; The display screen is in the first state of screen off, responding to the user's second operation, the second operation being used to wake up the display screen; Power on the display screen in the default display state, and receive a second switching instruction sent by the display driver chip. The second switching instruction is used to instruct the display screen to switch from the default display state to the first state. According to the second switching instruction, the display state is switched from the default display state to the first state; The third image frame sent by the display driver chip is displayed in the display area corresponding to the first state; the default display state includes a full-screen display state. The display driver chip is used to send the second switching command to the display screen and also to send the third image frame to the display screen.

19. The display module as described in claim 18, characterized in that, The display screen includes a first area and a second area. The first state includes a first state, a second state, or a third state, wherein the first state is to display in the first area, the second state is to display in the second area, and the third state is to display in the entire area of ​​the display screen.

20. An electronic device, characterized in that, The electronic device includes a system-on-a-chip and a display module as described in claim 18 or 19; The system-on-a-chip is configured to send a second switching instruction to the display driver chip in response to the user's second operation. The second display area switching instruction is configured to instruct the display driver chip to control the display screen to switch from the default display state to the first state. It is also used to send the third image frame to the display driver chip; The display driver chip is used to receive the second switching instruction sent by the system-on-a-chip and the third image frame sent by the system-on-a-chip.

21. A display method, characterized in that, Applied to a display device, the display device including a display driver chip and a display screen, the method includes: When the display screen is in a first display state, the display driver chip sends a first switching instruction to the display screen. The first switching instruction is used to instruct the display screen to switch from the first display state to a second display state. The first display state is to display in a first display area, and the second display state is to display in a second display area. The display driver chip sends a first image frame to the display screen, and the first image frame is the image frame displayed in the second display state. The display screen switches from the first display state to the second display state according to the first switching instruction, and displays the first image frame in the second display area.

22. The method as described in claim 21, characterized in that, Before the display driver chip sends the first switching command to the display screen, the method further includes: The display driver chip sends a first screen-off command to the display screen; The display screen controls the screen-off area corresponding to the second display state to enter the screen-off state according to the first screen-off command.

23. The method as described in claim 21 or 22, characterized in that, After the display driver chip sends the first image frame to the display screen, the method further includes: The display driver chip sends a first screen-on command to the display screen; The display screen controls the second display area to enter the screen-on state according to the first screen-on command.

24. A method for switching display states, characterized in that, Applied to an electronic device, the electronic device including a display screen; the method includes: When the display screen is in a first display state, in response to a user's first operation, the electronic device instructs the display screen to switch from the first display state to a second display state, wherein the first display state is for display in a first display area and the second display state is for display in a second display area; The first image frame is displayed in the second display area of ​​the display screen.

25. The method as described in claim 24, characterized in that, After responding to the user's first operation, and before the electronic device instructs the display screen to switch from the first display state to the second display state, the method further includes: Control the screen-off area corresponding to the second display state in the display screen to enter the screen-off state, and control the second display area in the display screen to enter the screen-on state.

26. The method as described in claim 24 or 25, characterized in that, The first display area and the second display area are non-overlapping display areas; Before the electronic device instructs the display screen to switch from the first display state to the second display state, the method further includes: A second image frame is displayed in the first display area. The second image frame is a black and white image.

27. The method as described in claim 24 or 25, characterized in that, The first display area includes the second display area and the first sub-area; before the electronic device instructs the display screen to switch from the first display state to the second display state, the method further includes: A second image frame is displayed in the first display area, wherein the image corresponding to the first sub-region in the second image frame is a black image.

28. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 21-23, or the method as described in any one of claims 24-27.

29. A computer program product, characterized in that, When the computer program product is run on a computer, it causes the computer to perform the method as described in any one of claims 21-23, or the method as described in any one of claims 24-27.

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