Display apparatus, method and apparatus for controlling same

The invention discloses a display device and a control method and control device.The control method is executed by a first device, the first device is a wrist strap device, and the control method comprises the following steps that S1, when a first track of a second device on a target surface is detected, S2 is executed; s2, detecting a second track of second equipment on the target surface; s3, when a third track of the second equipment on the target surface is detected, executing S4; s4, a fourth track is calculated, a control instruction is generated according to the fourth track, the control instruction is sent to a display terminal, the fourth track is mapping of the part, except the third track, in the second track on a first plane, and the first plane is constructed according to the first track. 本发明公开了显示设备及其控制方法和控制设备，其中所述的控制方法由第一设备执行，所述第一设备为腕带设备，所述的控制方法包括如下步骤：S1：当检测到第二设备在目标面的第一轨迹时，执行S2；S2：检测第二设备在目标面的第二轨迹；S3：当检测到第二设备在目标面的第三轨迹时，执行S4；S4：计算第四轨迹，并根据所述第四轨迹生成控制指令，并将所述控制指令发送至显示终端，其中，所述第四轨迹为所述第二轨迹中除所述第三轨迹外的部分在第一