Abstract: A line control device and a line control method for a user terminal are operated to control the user terminal. The line control device includes a flexible body, a control unit arranged in the flexible body, and a first deformation detection unit arranged along a first axis of the flexible body. The first deformation detection unit is electronically connected to the control unit. The first deformation detection unit is operated to detect a deformation of the flexible body with respect to the first axis. The control unit is operated to control the user terminal according to a deformation of the flexible body with respect to the first axis.

Abstract: The present disclosure provides a content input method, applied to a head mounted display device, which comprises a headphone apparatus, a display apparatus and a touch input apparatus. The method comprises steps of: controlling the display apparatus to display a soft keyboard input interface in response to a content input request, the soft keyboard input interface comprising an input box and a plurality of virtual keys arranged circularly; determining a virtual key to be input in response to a first touch action applied an annular first touch pad of the touch input apparatus; and displaying a character in the input box when the virtual key to be input is determined to be the character. The present disclosure further provides a head mounted display device. The head mounted display device and the content input method of the present disclosure can help the user to input after wearing the head mounted display device.

Abstract: A line control device and a line control method for a user terminal are operated to control the user terminal. The line control device includes a flexible body, a control unit arranged in the flexible body, and a first deformation detection unit arranged along a first axis of the flexible body. The first deformation detection unit is electronically connected to the control unit. The first deformation detection unit is operated to detect a deformation of the flexible body with respect to the first axis. The control unit is operated to control the user terminal according to a deformation of the flexible body with respect to the first axis.