Patent Description:
Smart terminals have been widely used in daily life, and users can get more information through the smart terminals. Moreover, in order to increase screen areas of the smart terminals, flexible screens with better flexibility are used in more smart terminals.

In the related art, screen folding is the general way to change the screen areas of the smart terminals. A housing of the smart terminal is divided into a first housing and a second housing. The first housing and the second housing can be folded and extended by a bending structure arranged therebetween, and a flexible screen covers an upper surface of the first housing and an upper surface of the second housing. When a screen with a larger area is needed, the first housing or the second housing is bent, so that the upper surface of the first housing and the upper surface of the second housing are in the same horizontal plane and in an extended state. In this case, the whole flexible screen can be used to display images. When a screen with a smaller area is needed, the first housing or the second housing is bent, so that the first housing is located below the second housing and in a folded state. In this case, a part of the flexible screen located on the upper surface of the second housing in the entire flexible screen can display images.

However, the related art only covers two cases of the screen area of the smart terminal, one is the area of the whole flexible screen, and the other is the area of a half flexible screen, which leads to lower flexibility of adjusting the screen area of the smart terminal and smaller application range.

<CIT> discloses a display device comprising a shell and a single flexible display panel, wherein the flexible display panel can be partially or completely exposed out of the shell, and can be bent to the back side of the shell in order to achieve independent displays on both the front and back side of the shell. <CIT> discloses a double-sided display device according to the preamble of claim <NUM>.

The present disclosure provides a double-sided display device, which improves the flexibility of adjusting a display area, enlarges an application range of the double-sided display device, and is convenient for users to use.

Optionally, a housing drive part is further included, wherein the housing drive part is configured for driving the second housing to slide relative to the first housing.

Optionally, the housing drive part includes a housing drive motor and a rack assembly driven to slide by the housing drive motor.

Optionally, the rack assembly includes a fixed seat, a first rack, a second rack and a gear meshed with the first rack and the second rack simultaneously, the fixed seat is fixed to the first housing, the first rack and the second rack are both slidably arranged on the fixed seat, and the second rack is connected with the second housing, and the housing drive motor is connected with the first rack and configured for driving the first rack to slide.

Optionally, the flexible screen drive part includes first roll shafts and a flexible screen drive motor configured for driving the first roll shafts to rotate, and the other end of the first flexible screen is wound on the two first roll shafts.

Optionally, the flexible screen drive part further includes a second roll shaft, the other end of the second flexible screen is wound on the second roll shaft, and the flexible screen drive motor is further configured for driving the second roll shaft to rotate.

Optionally, the flexible screen drive part further includes a roller, the roller is located between the first flexible screen and the second flexible screen, and teeth are evenly distributed on an outer side of the roller in a circumferential direction; an inner side of the first flexible screen is provided with a plurality of first tooth sockets, the teeth are meshed with the first tooth sockets, and the flexible screen drive motor is further configured for driving the roller to rotate.

Optionally, an inner side of the second flexible screen is provided with a plurality of second tooth sockets, and the teeth can be meshed with the second tooth sockets.

Optionally, an elastic structure and two fixing structures are further included, wherein the elastic structure and the two fixing structures are all located between the first flexible screen and the second flexible screen, two ends and a middle of the elastic structure are spiral, and one end of the elastic structure is arranged on the first flexible screen through one of the fixing structures, and the other end of the elastic structure is arranged on the second flexible screen through the other of the fixing structures.

Optionally, a control switch fixed on the housing is further included, wherein the control switch is connected with the flexible screen drive motor, and is configured for controlling the flexible screen drive motor to be enabled and stopped.

Optionally, one end of the first flexible screen is wound in the first housing.

According to the double-sided display device provided by the present disclosure, double-sided display of the double-sided display device is implemented by arranging the first flexible screen and the second flexible screen on the front and rear sides of the housing respectively, so that the display area of the double-sided display device is increased; the second flexible screen is driven to be extended by the housing drive part, and the first flexible screen is driven to be extended by the flexible screen drive part, so that the display area of the double-sided display device can be controlled, and thus, the display area of the double-sided display device can have various situations, which improves the flexibility of adjusting the display area of the double-sided display device, enlarges an application range of the double-sided display device, and is convenient for users to use.

In the drawings:
<NUM> refers to housing; <NUM> refers to first housing; <NUM> refers to second housing; <NUM> refers to first flexible screen; <NUM> refers to first tooth socket; <NUM> refers to second flexible screen; <NUM> refers to housing drive part; <NUM> refers to fixed seat; <NUM> refers to first rack; <NUM> refers to second rack; <NUM> refers to gear; <NUM> refers to housing drive motor; <NUM> refers to flexible screen drive part; <NUM> refers to first roll shaft; <NUM> refers to flexible screen drive motor; <NUM> refers to second roll shaft; <NUM> refers to roller; <NUM> refers to tooth; <NUM> refers to elastic structure; <NUM> refers to fixing structure; <NUM> refers to control switch; <NUM> refers to braced frame; and <NUM> refers to camera module.

The technical solutions of the present disclosure will be described with reference to the accompanying drawings and through the embodiments hereinafter. The embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the present disclosure. For ease of description, the accompanying drawings only show the parts related to the present disclosure, but not all of the present disclosure.

This embodiment provides a double-sided display device, the two sides of which are both provided with a flexible screen, and display areas of the flexible screens at the two sides can be adjusted, so that the double-sided display device has higher flexibility.

As shown in <FIG>, the double-sided display device includes a housing <NUM>, a first flexible screen <NUM> configured for displaying in a front side of the housing <NUM>, a second flexible screen <NUM> configured for displaying in a rear side of the housing <NUM>, and a flexible screen drive part <NUM> configured for driving the first flexible screen <NUM> to be extended.

As shown in <FIG>, the housing <NUM> includes a first housing <NUM> and a second housing <NUM> slidingly connected with the first housing <NUM>. The first flexible screen <NUM> has a first display surface facing one side of the housing <NUM>, the first flexible screen <NUM> is located at a front side of the double-sided display device, and one end of the first flexible screen <NUM> is connected in the first housing <NUM> and the other end of the first flexible screen <NUM> is wound in the second housing <NUM>. In other words, the first flexible screen <NUM> includes a flat part tiled on one side of the first housing <NUM> and a winding part wound in the second housing <NUM>. The second flexible screen <NUM> is arranged opposite to the first flexible screen <NUM>, and has a second display surface facing the other side of the housing <NUM>, the second flexible screen <NUM> is located at a rear side of the double-sided display device, one end of the second flexible screen <NUM> is fixed in the second housing <NUM>, and the other end of the second flexible screen <NUM> is wound in the first housing <NUM>. In other words, the second flexible screen <NUM> also includes a winding part, and the winding part of the second flexible screen <NUM> is located in the first housing <NUM>. The second display surface and the first display surface can display the same image, or the second display surface and the first display surface can also display different images. Optionally, a bottom wall of the first housing <NUM> may also be provided with a camera module <NUM>. As shown in <FIG>, the flexible screen drive part <NUM> is located in the first housing <NUM>, and is close to a left end of the first housing <NUM>. The flexible screen drive part <NUM> is configured for driving the winding parts of the first flexible screen <NUM> and the second flexible screen <NUM> to wind and unwind when the second housing <NUM> slides relative to the first housing <NUM>, so as to change a display area. In addition, because one end of the second flexible screen <NUM> is fixed in the second housing <NUM>, when the second housing <NUM> slides, one end of the second flexible screen <NUM> can be driven to move, so that the winding part of the second flexible screen <NUM> can be wound and unwound, that is, the second housing <NUM> and the flexible screen drive part <NUM> can simultaneously drive the winding part of the second flexible screen <NUM> to wind.

The double-sided display device provided by this embodiment has a plurality of display states, which are respectively a normal display state, an extended display state and a transitional display state between the two display states. When the double-sided display device is in the normal display state, the flat part of the first flexible screen <NUM> on the front side of the housing <NUM> is exposed and used to display images (as shown in <FIG>), while the second flexible screen <NUM> on the rear side of the housing <NUM> is not exposed out of the housing <NUM>, that is, the second flexible screen <NUM> is shaded by the first housing <NUM> and the second housing <NUM> (as shown in <FIG>) and cannot display images. When the double-sided display device is in the extended display state, the flat part of the first flexible screen <NUM> on the front side of the housing <NUM> and a part of the winding part are both exposed out of the housing <NUM> and used to display images (as shown in <FIG>). In this case, the display area is larger, and the part of the second flexible screen <NUM> on the rear side of the housing <NUM> is exposed out of the housing <NUM>, and can be used to display images (as shown in <FIG>), which increases the display area of the double-sided display device. When the double-sided display device is in the transitional display state, the display area of the double-sided display device is between the display area in the normal display state and the display area in the extended display state.

When it is necessary to control the double-sided display device to change from a normal display state to an extended display state, the second housing <NUM> is driven to slide away from the first housing <NUM> first, so that the second housing <NUM> can pull the second flexible screen <NUM> to extend, which is, to pull the winding part of the second flexible screen <NUM> to unwind, and meanwhile, drive the winding parts of the first flexible screen <NUM> and the second flexible screen <NUM> to unwind through the flexible screen drive part <NUM>, so that a second part of the first flexible screen <NUM> is extended. In this process, the action of the flexible screen drive part <NUM> may be stopped at any time to obtain a corresponding display area of the first flexible screen <NUM> and a corresponding display area of the second flexible screen <NUM> as needed. In this embodiment, the second housing <NUM> can be manually pulled by a user to slide relative to the first housing <NUM>, and the second housing <NUM> can also be driven to slide relative to the first housing <NUM> by a driver, which is not limited in this embodiment. According to the double-sided display device provided by the present disclosure, double-sided display of the double-sided display device is implemented by arranging the first flexible screen <NUM> and the second flexible screen <NUM> on the front and rear sides of the housing <NUM> respectively, so that the display area of the double-sided display device is increased; the winding part of the first flexible screen <NUM> and the second flexible screen <NUM> are driven to wind and unwind by the housing drive part <NUM>, so that the display area of the double-sided display device can be controlled, and thus, the display area of the double-sided display device can have various situations, which improves the flexibility of adjusting the display area of the double-sided display device, enlarges an application range of the double-sided display device, and is convenient for users to use.

Optionally, as shown in <FIG>, the double-sided display device may also include a braced frame <NUM> located in the housing <NUM>, the braced frame <NUM> is configured for bracing the first flexible screen <NUM> and the second flexible screen <NUM>, so as to prevent the first flexible screen <NUM> and the second flexible screen <NUM> from being excessively bent to affect the use.

In this embodiment, as shown in <FIG>, one end of the first flexible screen <NUM> is wound in the first housing <NUM>. In other words, the two ends of the first flexible screen <NUM> are both provided with a winding part, and one winding part is wound in the first housing <NUM>, and the other winding part is wound in the second housing <NUM>. When the first flexible screen <NUM> is extended, the two winding parts of the first flexible screen can be extended at the same time, or one of the two winding parts of the first flexible screen <NUM> is extended and the other one is kept in a wound state, which is not limited in this embodiment.

Optionally, as shown in <FIG>, the double-sided display device further includes a housing drive part <NUM> configured for driving the housing <NUM> to extend. In an embodiment, the housing drive part <NUM> is fixedly connected with the second housing <NUM> and is configured for driving the second housing <NUM> to slide relative to the first housing <NUM>. The housing drive part <NUM> can drive the second housing <NUM> to slide close to or away from the first housing <NUM>.

In an embodiment, the housing drive part <NUM> may include a housing drive motor <NUM> and a rack assembly driven to slide by the housing drive motor <NUM>. The rack assembly is connected with the second housing <NUM>. When the housing drive motor <NUM> drives the rack assembly to move, the rack assembly can drive the second housing <NUM> to slide relative to the first housing <NUM>.

Optionally, as shown in <FIG>, the rack assembly includes a fixed seat <NUM>, a first rack <NUM>, a second rack <NUM> and a gear <NUM> meshed with the first rack <NUM> and the second rack <NUM> simultaneously. The fixed seat <NUM> is fixed to the first housing <NUM>, the first rack <NUM> and the second rack <NUM> are both slidably arranged on the fixed seat <NUM>, and the second rack <NUM> is connected with the second housing <NUM>. When the first rack <NUM> slides in a first direction, the second rack <NUM> can be driven by the gear <NUM> to slide in a second direction, so that the second rack <NUM> drives the second housing <NUM> to slide in the second direction, and then the second flexible screen <NUM> can be extended or contracted. The second direction is opposite to the first direction. For example, in <FIG>, when the first rack <NUM> moves upward, the second rack <NUM> moves downward under the action of the gear <NUM>. In this case, the second rack <NUM> drives the second housing <NUM> to move downward, so as to be away from the first housing <NUM>, and the second housing <NUM> pulls one end of the second flexible screen <NUM> to move downward, so that the winding part of the second flexible screen <NUM> is unwound, and thus, the second flexible screen <NUM> is extended. However, the contracted process of the second flexible screen <NUM> is opposite to this process, and will not be elaborated in this embodiment here.

Optionally, the fixed seat <NUM> may be provided with a slide track, and bottoms of the first rack <NUM> and the second rack <NUM> may be provided with runners which can be slidably arranged on the slide track, so as to realize the sliding of the first rack <NUM> and the second rack <NUM> relative to the fixed seat <NUM>, and the slide track can also guide a slide direction of the first rack <NUM> and the second rack <NUM>.

Optionally, please continuously refer to <FIG>. The flexible screen drive part <NUM> may include two first roll shafts <NUM> and a flexible screen drive motor <NUM> for driving the two first roll shafts <NUM> to rotate. Two ends of the first flexible screen <NUM> (i.e., two winding parts of the first flexible screen <NUM>) are wound on the two first roll shafts <NUM> respectively. When the first roll shaft <NUM> rotates in a first rotation direction, winding of the winding part of the first flexible screen <NUM> can be realized. When the first roll shaft <NUM> rotates in a direction opposite the first rotation direction, unwinding of the winding part of the first flexible screen <NUM> can be realized. Optionally, an outer surface of the first roller shaft <NUM> may be circumferentially provided with a plurality of bulges to better wind up the first flexible screen <NUM>. The first roll shaft <NUM> is rotatably connected to the first housing <NUM>, so that one end of the first flexible screen <NUM> is connected to the first housing <NUM> through the first roll shaft <NUM>.

For example, the flexible screen drive motor <NUM> can be connected with the first roll shaft <NUM> through a conversion structure. The conversion structure is respectively connected with a telescopic end of the flexible screen drive motor <NUM> and the first roll shaft <NUM>, and is configured for converting linear displacement generated by the telescopic end into rotation. For example, when the telescopic end is extended, the conversion structure can drive the first roll shaft <NUM> to rotate in the first rotation direction, and when the telescopic end is retracted, the conversion structure can drive the first roll shaft <NUM> to rotate in the direction opposite to the first rotation direction. Optionally, the conversion structure may be a gear structure with teeth inside and outside, and the telescopic end may be a rack.

In an embodiment, as shown in <FIG>, the flexible screen drive part <NUM> may further include a second roll shaft <NUM>. The other end of the second flexible screen <NUM> (i.e., the winding part of the second flexible screen <NUM>) is wound on the second roll shaft <NUM>. In this case, the flexible screen drive motor <NUM> is further configured for driving the second roll shaft <NUM> to rotate, so that the second flexible screen <NUM> is extended or contracted. Optionally, an outer surface of the second roll shaft <NUM> may be circumferentially provided with a plurality of bulges to better wind up the second roll shaft <NUM>. Moreover, in order to avoid interference between the movement of the first flexible screen <NUM> and the second flexible screen <NUM>, the second roll shaft <NUM> is located between the two first roll shafts <NUM>.

In an embodiment, as shown in <FIG>, the flexible screen drive part <NUM> may also include a roller <NUM>. The roller <NUM> is located between the first flexible screen <NUM> and the second flexible screen <NUM>, and teeth <NUM> are evenly distributed on an outer side of the roller <NUM> in a circumferential direction. An inner side of the first flexible screen <NUM> (that is, the opposite side of the first display surface) is provided with a plurality of first tooth sockets <NUM>, and the teeth <NUM> can be meshed with the first tooth sockets <NUM>. The flexible screen drive motor <NUM> is further configured for driving the roller <NUM> to rotate, so that when the roller <NUM> rotates, the first flexible screen <NUM> can be driven to move by the teeth <NUM> and the first tooth sockets <NUM> which are meshed with each other. For example, when the roller <NUM> rotates along the first rotation direction, the first flexible screen <NUM> can be driven to move along the first direction. In this case, one winding part of the first flexible screen <NUM> is unwound. When the roller <NUM> rotates along a second rotation direction, the first flexible screen <NUM> can be driven to move along the second direction. In this case, the other winding part of the first flexible screen <NUM> is unwound. As shown in <FIG>, the inner side of the first display screen <NUM> is provided with a plurality of bulge structures, and the plurality of bulge structures is arranged at intervals, and the first tooth socket <NUM> is formed between two adjacent bulge structures. Optionally, the flexible screen drive part <NUM> may include a plurality of rollers <NUM> to improve the stability and reliability when the rollers <NUM> drive the first flexible screen <NUM> to move.

Optionally, the inner side of the second flexible screen <NUM> may be provided with a plurality of second tooth sockets, and the teeth <NUM> can be meshed with the second tooth sockets. In this case, the roller <NUM> can also assist the second housing <NUM> to drive the second flexible screen <NUM> to move, so as to ensure that the second flexible screen <NUM> can be extended or contracted.

In this embodiment, as shown in <FIG> and <FIG>, the double-sided display device further includes an elastic structure and two fixing structures <NUM>. The elastic structure <NUM> and the two fixing structures <NUM> are all located between the first flexible screen <NUM> and the second flexible screen <NUM>, and, two ends and a middle of the elastic structure <NUM> are spiral, and one end of the elastic structure <NUM> is arranged on the first flexible screen <NUM> through one of the fixing structures <NUM>, and the other end of the elastic structure <NUM> is arranged on the second flexible screen <NUM> through the other of the fixing structures <NUM>. The elastic structure <NUM> is configured for elastically bracing the first flexible screen <NUM> and the second flexible screen <NUM>. Moreover, in the extended process of the first flexible screen <NUM> and the second flexible screen <NUM>, the elastic structure <NUM> can also control the strength and toughness during extending, and prevent the first flexible screen <NUM> and the second flexible screen <NUM> from being damaged due to quick bounce.

Claim 1:
A double-sided display device, comprising:
a housing (<NUM>), comprising a first housing (<NUM>) and a second housing (<NUM>) slidingly connected with the first housing (<NUM>);
a first flexible screen (<NUM>) having a first display surface facing one side, one end of the first flexible screen (<NUM>) being connected in the first housing (<NUM>) and the other end being wound in the second housing (<NUM>);
a second flexible screen (<NUM>) arranged opposite to the first flexible screen (<NUM>) and having a second display surface facing the other side, characterized by one end of the second flexible screen (<NUM>) being fixed in the second housing (<NUM>), and the other end being wound in the first housing (<NUM>); and by a flexible screen drive part (<NUM>), wherein the flexible screen drive part (<NUM>) drives winding parts of the first flexible screen (<NUM>) and the second flexible screen (<NUM>) to wind when the second housing (<NUM>) slides relative to the first housing (<NUM>), so as to change a display area.