## 4 Case Study
### IPC-Based Coordinate System and Opportunity Identification  
An IPC-based coordination system of DJI's patents was formed according to Section 3.2.4, and the results are shown in Figure 15. Patents in the region where the value of technological novelty is 8, which belongs to the top two most difficult domains, are technological opportunities with radial invention features, found at the upper right corner of Figure 15.  
Patents represented by the orange part in the upper right corner are patents with radical invention features, mainly in the \"control system\" of a UAV. Eight core patents are listed in Table 5. This illustrates that DJI's flight technology for a UAV implemented radical inventions, from smooth flight controlled by a throttle, to flight position controlled by distance, and angle to hover controlled by error and its error contribution rate. In addition, future radical inventions for the control system could be generated in the empty spaces of the first line. After a feasibility analysis, G02B (optical elements) could be used for adding interactive virtual content and guidance (AR) to assist flight control. This claim was confirmed by patent CN108700741B, titled \"Headsets and Video Glasses for UAV\", published on 21 August 2021. \begin{table}
\begin{tabular}{c c c c c c} \hline
**Execution System** & \begin{tabular}{c} **Transmission** \\ **System** \\ **(Structure)** \\ \end{tabular} & \begin{tabular}{c} **Energy System** \\ **(Engine)** \\ \end{tabular} & \begin{tabular}{c} **Control System** \\ **(Flight)** \\ \end{tabular} & \
\begin{tabular}{c} **Communication** \\ **System** \\ **(Customer/Manipulation)** \\ \end{tabular} &
\begin{tabular}{c} **Others** \\ **(Customer/Manipulation)** \\ \end{tabular} \\ \hline
26 & 14 & 16 & 29 & 20 & 27 \\ \hline \end{tabular}
\end{table} 
Table 4: Degree of centrality of the six R&D themes’ nodes in the IPC network. Figure 14: IPC network. Parents represented by the blue part at the upper right corner of the second line are patents with radical invention features and featured in the executive system of a UAV. Twelve core patents are listed in Table 6, showing that DJI's shooting technology for UAV implemented radical inventions, from remote zooming to tracking focused to ultra-wide range shooting by controlling the rotation and angle of the lens in the horizontal and vertical direction; and image processing technology grew from adjusting the brightness of images to controlling the fill light using exposure parameters. In addition, future radical inventions in the executive system could be generated in the blank areas of the second line. After a feasibility analysis, H04B (electric communication technique, transmission)  
Figure 15: IPC-based coordinate system. can be used for designing a synchronous shooting system, having multiple cameras for three-dimensional images. Finally, future technological opportunities of radical inventions are predicted for UAVs. As drones spread to different industries, the boundaries of \"civilian\" and \"industrial\" UAVs are unclear. A growing number of applications use mission-driven UAVs with powerful computing capabilities. Therefore, G06Q (data processing system or methods, specially adapted for supervisory of forecasting purposes) can be applied to implement the flight function in the control system. This technology has not been used in UAVs before. The first attempts at the control system of UAVs use different technology to implement difficult functional elements. After the feasibility analysis, a flight control intelligent data analysis and decision support system could be achieved to confirm the safety of the flight control, monitor the real-time flight data, and forecast future operational states. In addition, the future sales of UAVs depend on the demand for video creation in the film and television industry and entertainment market. G11B (recording, storing, or playback of information) can be applied to implement image processing functions in the execution system.