A method for correcting bending of a flexible display device is described. The method includes forming a plurality of sensor groups of an augmented reality (AR) display device, where one of the plurality of sensor groups includes a combination of a camera, an IMU (inertial measurement unit), and a component, each being tightly coupled to each other, a spatial relationship between the camera, the IMU sensor, or the component being predefined, accessing sensor groups data from the plurality of sensor groups, estimating a spatial relationship between the plurality of sensor groups based on the sensor groups data, and displaying virtual content in a display of the AR display device based on the spatial relationship between the plurality of sensor groups.