Abstract: A backplane includes: a substrate including a circuit structure layer, a first reflective layer disposed on a bearing surface of the substrate, a plurality of light-emitting diode chips, and a plurality of optical structures. The first reflective layer includes a plurality of through holes spaced apart. A light-emitting diode chip in the plurality of light-emitting diode chips is located in one of the plurality of through holes. The plurality of light-emitting diode chips are electrically connected to the circuit structure layer. The circuit structure layer is configured to drive the plurality of light-emitting diode chips to emit light. An optical structure in the plurality of optical structures covers the light-emitting diode chip, a light incident surface of the optical structure is in contact with a light exit surface of the light-emitting diode chip, and a light exit surface of the optical structure is a curved surface.

Abstract: Provided are a method, apparatus and device for detecting a field curvature of a VR optical module, wherein a diaphragm is fixed on a lens of a camera, a first electronic control is used to drive the VR optical module to self-rotate around an optical axis of a VR lens, and a second electronic control is used to drive the camera to swing in a plane where the optical axis of the VR lens is located with a center of the diaphragm as a fixed point.

Abstract: Provided are a method, apparatus and device for detecting a field curvature of a VR optical module, wherein a diaphragm is fixed on a lens of a camera, a first electronic control is used to drive the VR optical module to self-rotate around an optical axis of a VR lens, and a second electronic control is used to drive the camera to swing in a plane where the optical axis of the VR lens is located with a center of the diaphragm as a fixed point.