Patent ID: 11917778
Assignee: WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC H  F  G | IPC F  H

Claim 0:
1. A foldable display device, comprising:
a first casing, a second casing, and a flexible display panel, wherein the first casing and the second casing are configured to support the flexible display panel, the first casing and the second casing are disposed opposite to each other, the first casing is rotatable about a first rotation center, and the second casing is rotatable about a second rotation center;
wherein a y coordinate axis is defined by a straight line perpendicular to a plan on which the first casing and the second casing are located and extending to a middle between the first casing and the second casing when the foldable display device is in a flat state; and
an x coordinate axis is defined by a straight line located on and overlapping a plane the same as that of surfaces of the first casing and the second casing adjacent to the flexible display panel when the foldable display device is in the flat state;
wherein the x coordinate axis and the y coordinate axis are coplanar and perpendicular to each other, a coordinate origin o is defined by an intersection of the x coordinate axis and the y coordinate axis, and an xoy coordinate plane is cooperatively defined by the x coordinate axis, the y coordinate axis, and the coordinate origin, wherein coordinates of an orthographic projection of the first rotation center on the xoy coordinate plane are (x1, y1), and coordinates of an orthographic projection of the second rotation center on the xoy coordinate plane are (−x1, y1);
wherein a predetermined value is defined by a sum of coordinate values x1 and y1, the coordinate value x1 is greater than zero, the coordinate value y1 is greater than −0.3 millimeter (mm) and less than or equal to 1 mm, and the predetermined value is greater than zero mm and less than or equal to 2.5 mm;
wherein the flexible display panel comprises an organic light-emitting diode (OLED) array layer, and the OLED array layer is spaced apart from the surfaces of the first casing and the second casing adjacent to the flexible display panel;
wherein the first rotation center and the second rotation center are located at a side of a lower surface of the OLED array layer adjacent to the first casing and the second casing in a direction of the y coordinate axis when the foldable display device is in the flat state, and each of the first rotation center and the second rotation center is spaced at a distance greater than or equal to 0 mm and less than or equal to 0.243 mm from the lower surface of the OLED array layer, or the first rotation center and the second rotation center are located at a side of the lower surface of the OLED array layer away from the first casing and the second casing, wherein each of the first rotation center and the second rotation center is spaced at a distance greater than 0 mm and less than or equal to 0.157 mm from the lower surface of the OLED array layer, wherein the lower surface of the OLED array layer is a surface of the OLED array layer adjacent to the first casing and second casing.