EP-4742224-A1 - SCREEN CONTROL METHOD APPLIED TO FOLDABLE SCREEN DEVICE AND RELATED APPARATUS

EP4742224A1EP 4742224 A1EP4742224 A1EP 4742224A1EP-4742224-A1

Abstract

This application provides a screen control method applied to a foldable screen device and a related apparatus. In the method, the foldable screen device includes a first physical screen, and the first physical screen includes a first screen area and a second screen area. When the foldable screen device is in a first physical form, the first screen area is on, and the second screen area is blank; and in response to switching from the first physical form to a second physical form, the second screen area is controlled to be on, the first screen area is controlled to be blank, and the first screen area is controlled to be powered off. In this application, after the second screen area of the first physical screen is blank, the second screen area may be controlled to be powered off, so that power consumption of the foldable screen device can be reduced, and standby time can be increased.

Inventors

XU, YONG

Assignees

Huawei Technologies Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20250520

Claims (17)

A screen control method applied to a foldable screen device, wherein the foldable screen device comprises a first physical screen, the first physical screen comprises a first screen area and a second screen area, and the method comprises: when the foldable screen device is in a first physical form, the first screen area is on, and the second screen area is blank; and in response to switching from the first physical form to a second physical form, controlling the second screen area to be on, controlling the first screen area to be blank, and controlling the first screen area to be powered off.
The method according to claim 1, wherein the first physical screen is a liquid crystal display, the liquid crystal display comprises a backlight panel and a liquid crystal layer, and when the first screen area is on, the backlight panel corresponding to the first screen area is in a power-on state, and the liquid crystal layer corresponding to the first screen area is in a power-on state.
The method according to claim 2, wherein when the first screen area is blank, the backlight panel corresponding to the first screen area is in the power-on state, the liquid crystal layer corresponding to the first screen area is in the power-on state, and the liquid crystal layer completely blocks light from the backlight panel; and controlling the first screen area to be powered off comprises: controlling the backlight panel corresponding to the first screen area to be powered off, and controlling the liquid crystal layer corresponding to the first screen area to be powered off.
The method according to claim 2, wherein when the first screen area is blank, the backlight panel corresponding to the first screen area is in a power-off state, and the liquid crystal layer corresponding to the first screen area is in the power-on state; and controlling the first screen area to be powered off comprises: controlling the liquid crystal layer corresponding to the first screen area to be powered off.
The method according to any one of claims 1 to 4, wherein the foldable screen device comprises a plurality of shafts, the foldable screen device implements a physical form change through any one of the shafts, and before controlling the second screen area to be on, controlling the first screen area to be blank, and controlling the first screen area to be powered off, the method further comprises: determining a first display mode based on a folding angle corresponding to each shaft and a physical form corresponding to each shaft, wherein the first display mode indicates that the first screen area is switched from a screen-on state to a blank screen state, and the second screen area is switched from a blank screen state to a screen-on state.
The method according to claim 5, wherein determining the first display mode based on the folding angle corresponding to each shaft and the physical form corresponding to each shaft comprises: determining whether a first shaft and a second shaft whose folding angles or physical forms change simultaneously exist, wherein the first shaft and the second shaft are comprised in the plurality of shafts; and if the first shaft and the second shaft whose folding angles or physical forms change simultaneously do not exist, determining the first display mode at a first moment based on the folding angle corresponding to each shaft and the physical form corresponding to each shaft, and determining the first display mode at a second moment based on the folding angle corresponding to each shaft and the physical form corresponding to each shaft, wherein the first moment is a moment at which the folding angle of the first shaft changes, and the second moment is a moment at which the folding angle of the second shaft changes.
The method according to claim 6, wherein when the first shaft and the second shaft whose folding angles or physical forms change simultaneously exist, determining the first display mode based on the folding angle corresponding to each shaft and the physical form corresponding to each shaft comprises: determining, based on the folding angle of the first shaft, whether the first shaft is in a half-folding critical state, wherein when the first shaft is in the half-folding critical state, the folding angle of the first shaft is within a folding angle range; and if the first shaft is not in the half-folding critical state, determining the first display mode based on the folding angle corresponding to each shaft and the physical form corresponding to each shaft; or if the first shaft is in the half-folding critical state, when the folding angle and the physical form that correspond to the second shaft meet a condition for triggering a status change of a screen area, determining the first display mode based on the folding angle and the physical form that correspond to each shaft.
The method according to any one of claims 1 to 7, wherein the method further comprises: when the foldable screen device is in a third physical form, the first screen area is blank, the second screen area is blank, and the first physical screen is in a power-off state; in response to switching from the third physical form to a fourth physical form, controlling the first physical screen to be powered on; and controlling the first screen area to be on, and controlling the second screen area to be powered off.
The method according to claim 8, wherein the third physical form is in a folded state.
The method according to claim 9, wherein the foldable screen device comprises the plurality of shafts, the foldable screen device implements a physical form change through any shaft, and before controlling the first physical screen to be powered on, the method further comprises: determining a second display mode based on the folding angle corresponding to each shaft and the physical form corresponding to each shaft, wherein the second display mode indicates that the first screen area is switched from the blank screen state to the screen-on state, and the second screen area remains in the blank screen state.
The method according to any one of claims 5 to 7, wherein the foldable screen device comprises a sensor service and a screen switching module, and the method comprises: reporting, by the sensor service to the screen switching module, the folding angle corresponding to each shaft and the physical form corresponding to each shaft; and determining the first display mode based on the folding angle corresponding to each shaft and the physical form corresponding to each shaft comprises: determining, by the screen switching module, the first display mode based on the folding angle corresponding to each shaft and the physical form corresponding to each shaft.
The method according to claim 11, wherein the foldable screen device further comprises a display manager service DMS, a surface finger SF module, a hardware composer HWC, and a display driver, and after determining the first display mode, the method further comprises: sending, by the screen switching module, the first display mode to the DMS; sending, by the DMS, first information to the SF, wherein the first information comprises the first display mode, and the first information indicates to power off the first screen area; sending, by the SF, second information to the HWC, wherein the second information comprises content of the first information; forwarding, by the HWC, the second information to the display driver; and controlling the second screen area to be on, controlling the first screen area to be blank, and controlling the first screen area to be powered off comprises: controlling, by the display driver, the second screen area to be on, controlling the first screen area to be blank, and controlling the first screen area to be powered off.
The method according to claim 12, wherein the foldable screen device further comprises a window manager service WMS; and before sending, by the DMS, the first information to the SF, the method further comprises: sending, by the DMS, the first display mode to the WMS; performing, by the WMS, a screen freezing operation; drawing, by the WMS, a window based on the second screen area; performing, by the WMS, an unfreezing operation; and sending, by the WMS, a drawn window to the SF; the method further comprises: performing, by the SF, layer composition on the window to obtain a to-be-displayed image, wherein the second information further comprises the image; before sending, by the SF, the second information to the HWC, the method further comprises: determining, by the SF, whether the first physical screen is in a power-on state; sending, by the SF, the second information to the HWC comprises: when the first physical screen is in the power-on state, sending, by the SF, the second information to the HWC; and the method further comprises: in response to the second information, controlling, by the display driver, the second screen area to display the image.
A foldable screen device, wherein the foldable screen device comprises one or more processors and a memory, wherein the memory is coupled to the one or more processors, the memory is configured to store computer program code, the computer program code comprises computer instructions, and the one or more processors invoke the computer instructions to enable the foldable screen device to perform the method according to any one of claims 1 to 13.
A chip system, wherein the chip system is applied to a foldable screen device, the chip system comprises one or more processors, and the one or more processors are configured to invoke computer instructions, to enable the foldable screen device to perform the method according to any one of claims 1 to 13.
A computer-readable storage medium, wherein the computer-readable storage medium comprises computer instructions, and when the computer instructions are run on a foldable screen device, the foldable screen device is enabled to perform the method according to any one of claims 1 to 13.
A computer program product, wherein the computer program product comprises computer program code, and when the computer program code is run on a foldable screen device, the foldable screen device is enabled to perform the method according to any one of claims 1 to 13.

Description

This application claims priority to Chinese Patent Application No. 202410789488.4, filed with the China National Intellectual Property Administration on June 18, 2024, and entitled "SCREEN CONTROL METHOD APPLIED TO FOLDABLE SCREEN DEVICE AND RELATED APPARATUS", which is incorporated herein by reference in its entirety. TECHNICAL FIELD Embodiments of this application relate to the field of foldable screen device technologies, and in particular, to a screen control method applied to a foldable screen device and a related apparatus. BACKGROUND With development of terminal devices, foldable screen devices have been widely used. A user may use different screens in the foldable screen device by performing operations such as folding and unfolding. For example, the user may unfold the foldable screen device, to watch a video on a large screen. Alternatively, the user may fold the foldable screen device, to view information like time on a small screen. As a physical form of the foldable screen device changes, the foldable screen device may adjust a corresponding screen to be on or blank. Currently, after the screen is blank, the screen still consumes power. This increases power consumption of the foldable screen device and reduces standby time. SUMMARY Embodiments of this application provide a screen control method applied to a foldable screen device and a related apparatus. After a part of screen areas of a physical screen is blank, the part of screen areas may be controlled to be powered off, so that power consumption of the foldable screen device can be reduced, and standby time can be increased. According to a first aspect, an embodiment of this application provides a screen control method applied to a foldable screen device. The method may be performed by the foldable screen device, one or more chips in the foldable screen device, or at least one module in the chip. The following uses an example in which the method is performed by the foldable screen device for description. In the method, the foldable screen device includes a first physical screen, and the first physical screen includes a first screen area and a second screen area. It may be understood that the first physical screen may be considered as one physical screen, and one physical screen may be divided into a plurality of screen areas. The following uses the first screen area and the second screen area as an example for description. When the foldable screen device is in a first physical form, the first screen area is on, and the second screen area is blank. In response to switching from the first physical form to a second physical form, the foldable screen device may control the second screen area to be on, control the first screen area to be blank, and control the first screen area to be powered off. In this embodiment of this application, after controlling the first screen area of the first physical screen to be blank, the foldable screen device may further control the first screen area to be powered off, so that power consumption of the foldable screen device can be reduced, and standby time can be increased. In a possible implementation, the first physical screen is a liquid crystal display, and the liquid crystal display includes a backlight panel and a liquid crystal layer. When the first screen area is on, the backlight panel corresponding to the first screen area is in a power-on state, and the liquid crystal layer corresponding to the first screen area is in a power-on state. The following describes a manner in which the foldable screen device controls the first screen area to be powered off. First, when the first screen area is blank, the backlight panel corresponding to the first screen area is in the power-on state, the liquid crystal layer corresponding to the first screen area is in the power-on state, and the liquid crystal layer completely blocks light from the backlight panel. In this manner, the foldable screen device may control the backlight panel corresponding to the first screen area to be powered off, and control the liquid crystal layer corresponding to the first screen area to be powered off, to complete controlling the first screen area to be powered off. Second, when the first screen area is blank, the backlight panel corresponding to the first screen area is in a power-off state, and the liquid crystal layer corresponding to the first screen area is in the power-on state. In this manner, the foldable screen device may control the liquid crystal layer corresponding to the first screen area to be powered off, to complete controlling the first screen area to be powered off. In this embodiment of this application, the foldable screen device controls power-off of the first screen area in various manners, which is easy to implement and has a wide application scope. In a possible implementation, the foldable screen device includes a plurality of shafts, and the foldable screen device implements a physical form change through any o