CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a U.S. national phase application of a PCT Application No. PCT/CN2019/090484 filed on Jun. 10, 2019, which claims priority to Chinese Application No. 201910362478.1 filed on Apr. 30, 2019, the disclosures of which are incorporated in their entirety by reference herein.

FIELD OF THE INVENTION

The present application relates to a display technology field, and more particularly to a flexible display device.

BACKGROUND OF THE INVENTION

The flexible display device possesses the advantages of good bending resistance, and can be made smaller and smaller in size by folding and curling, and thus is more and more favored by the market.

The existing flexible display device mainly adopts the inner bending manner or the outer bending manner to accommodate the flexible display screen. However, the flexible display device folded in foregoing two manners is still large in size and cannot meet the portable requirement.

Therefore, the existing flexible display device has a technical problem that the curled flexible display screen is still large and needs to be improved.

SUMMARY OF THE INVENTION

The present application provides a flexible display device to solve a technical problem that the curled flexible display screen of the flexible display device is still large.

To solve the aforesaid problem, the technical solution of the present application is described as follows:

The present application provides a flexible display device, including:

a housing having a receiving cavity formed therein, wherein an opening is formed on at least one of two opposite side edges of the receiving cavity;

at least one winding mechanism disposed in the receiving cavity;

a flexible display screen disposed outside the housing, wherein one end of the flexible display screen extends into the opening and is connected to the winding mechanism; and

at least one stretching mechanism disposed in the receiving cavity, wherein each of the stretching mechanisms is connected to one of the winding mechanisms;

wherein when the flexible display screen is in a first state, the stretching mechanism pulls the winding mechanism to move in a direction away from the housing to pull the flexible display screen out of the winding mechanism; when the flexible display screen is in a second state, the stretching mechanism pulls the winding mechanism to move in a direction toward the housing to receive the flexible display screen into the winding mechanism.

In the flexible display device of the present application, the housing includes a first housing, a second housing and a connecting member connecting the first housing and the second housing, and a first receiving cavity is formed inside the first housing and a second receiving cavity is formed inside the second housing, and at least one of the first receiving cavity and the second receiving cavity is formed with an opening on a side away from the connecting member, wherein when the flexible display screen is in the first state, the first housing and the second housing are unfolded around the connecting member, and when the flexible display screen is in the second state, the first housing and the second housing are folded around the connecting member.

In the flexible display device of the present application, the winding mechanism includes a winding member and a first roller having parallel axes and not contacting each other, and the first roller is disposed between the winding member and the opening, and the winding member and the first roller are fixed on the stretching mechanism, and one end of the flexible display screen is connected to the winding member around the first roller and extends from the opening out of the housing.

In the flexible display device of the present application, the winding member is a coil spring.

In the flexible display device of the present application, the winding mechanism further includes a driving member, and the drive member drives the winding member to pull or retract the flexible display screen from the housing.

In the flexible display device of the present application, the winding mechanism further includes a second roller, and the second roller and the first roller are disposed on two sides of the winding member, and a distance between the second roller and the opening is greater than a distance of the first roller from the opening, and the axis of the first roller and an axis of the second roller are parallel, and the one end of the flexible display screen is connected to the winding member around the second roller and the first roller in sequence and extends from the opening out of the housing.

In the flexible display device of the present application, a diameter of the first roller is equal to or greater than a diameter of the second roller.

In the flexible display device of the present application, the winding mechanism further includes a third roller, and the third roller is disposed between the first roller and the winding member, and an axis of the third roller and the axis of the first roller are parallel, and the one end of the flexible display screen is connected to the winding member around the third roller, the second roller and the first roller in sequence and extends from the opening out of the housing.

In the flexible display device of the present application, a diameter of the third roller is less than or equal to a diameter of the second roller.

In the flexible display device of the present application, the stretching mechanism is a drawer, and a slider is disposed on the drawer, and a corresponding slide rail is disposed on the housing, and the slider slides along the slide rail.

In the flexible display device of the present application, the slider is a draw slip or a pulley.

In the flexible display device of the present application, the slide rail is disposed on a bottom side of the housing.

In the flexible display device of the present application, the slide rail is disposed on a lateral side of the housing.

In the flexible display device of the present application, a pull rod is further disposed on the drawer.

In the flexible display device of the present application, the flexible display device further includes a limiting plate disposed on a bottom side of the housing.

In the flexible display device of the present application, the flexible display device further includes a support layer, and the flexible display screen is disposed on the support layer.

In the flexible display device of the present application, a thickness of the support layer is 30 microns.

In the flexible display device of the present application, a material of the support layer is stainless steel.

In the flexible display device of the present application, the flexible display device further includes an adhesive layer, and the adhesive layer is disposed between the support layer and the flexible display screen, and the flexible display screen is fixed to the support layer by the adhesive layer.

In the flexible display device of the present application, a material of the adhesive layer is optical glue.

The benefits of the present application are: the present application provides a flexible display device, including a housing, at least one winding mechanism, a flexible display screen and at least one stretching mechanism, wherein a receiving cavity is formed in the housing, and an opening is formed on at least one of two opposite side edges of the receiving cavity; at least one winding mechanism disposed in the receiving cavity; a flexible display screen disposed outside the housing, wherein one end of the flexible display screen extends into the opening and is connected to the winding mechanism; and at least one stretching mechanism disposed in the receiving cavity, wherein each of the stretching mechanisms is connected to one of the winding mechanisms; wherein when the flexible display screen is in a first state, the stretching mechanism pulls the winding mechanism to move in a direction away from the housing to pull the flexible display screen out of the winding mechanism; when the flexible display screen is in a second state, the stretching mechanism pulls the winding mechanism to move in a direction toward the housing to receive the flexible display screen into the winding mechanism. By providing the stretching mechanism and the winding mechanism, the flexible display screen is wound up in the housing when not in use, the entire flexible display device is smaller in size, and the housing can protect the internal flexible display screen from damage.

