| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 106 === Based on different technical domains and functional domains in the technical/functional matrices of LED stage light, and in accordance with the modified DEMATEL operational steps, the paper finds the total relationship influence matrix, and draws the direct/indirect relationship diagrams, and the causal diagram of (D+R) value and (D-R) value. Such a causal diagram of (D+R) value and (D-R) value can help judge the degree of being mutually affected between different technical domains and mutually affected between different functional domains of LED stage light. The paper also adds in the modified technical life cycle. This life cycle is different from those in the past that the three technical domains on the first layer are separated, and analysis and exploration can be made by software. The paper also draws out life cycle curves, and divides the years into two stages. In this way, each technical domain can be explored independently, whereas in the past all the technical domains had to be discussed together. Using the modified technical life cycle curves, each technical domain can be analyzed in terms of years, being a more detailed way, and the relationship of mutual effects among them can be explored. The paper firstly focus LED stage light, to integation discuss the DEMATEL causal diagram of different technical domains and a technical activity trend chart, and analyzes the life span of patent techniques and the modified technical life cycle of patents which in the newly added in this . In accordance with the abovementioned practices of LED stage lights, the paper further collects the related LED track light patents. Using term segmentation and word segmentation system, the paper calculates the normalized numerical values of key technical words, part and component words and functional words of the various related patents. After that, the paper analyzes and induces the word clusters of technical words and part and component words of different first-layer technical domains, and then defines the second-layer technical domains and functional domains of their first-layer technical domain. Furthermore,the paper establishes the technical/functional matrix of LED track light. After that, with LED track light as the carrier, the paper also calculates the ratio of normalized numerical values of the patents’ technical words having repeated definition or the same definition between a certain technical domain and another technical domain in the related technical domains of LED track light. Applying a modified DEMATEL method, the paper obtains an evaluated value 0~4 of the degree of mutual effect among different technical domains. Then, the paper makes calculation and achieves the matrix of total relationship influence, direct/indirect relationship diagram, and causal diagram of (D+R) value and (D-R) value in order to judge the degree of being mutually affected among different technical domains of LED track light. Furthermore, the paper calculates the modified DEMATEL causal diagrams of different technical domains. Applying the method mentioned above, the paper also calculates the ratio of normalized numerical values of the patents’ functional words having repeated definition or the same definition between a certain functional domain and another functional domain in the related functional domains of LED track light.The paper further makes calculation and draws a modified DEMATEL causal diagram of different functional domains. Focusing on LED track light, the paper also integratively analyzes the DEMATEL causal diagrams with different functional domains, functional activity trend chart, patents’ functional life span and patents’ functional life cycle. For application of LED track light, the paper also combines the modified cosine similarity with probability method to carry out patent domain identification of the newly added LED track light patents. First of all, the paper uses modified cosine similarity for screening, and then employs probability method to calculate whether a patent may belong to technical domain or functional domain. The paper also conducts IPC analysis and inventor analysis of LED track light, and analyzes the core competitiveness of different companies and the technical and functional activity trends. The above analysis results can be provided to enterprises and engineers as a reference. Besides, the enterprises are able to understand the core competitiveness of their competitors.
New patent development rules are also added to the study. Through term segmentation and word segmentation system, new normalized numerical values can be calculated for different functions of each technique domain in the established technical/functional matrix. The new normalized numerical value refers to the quotient after dividing the number of technical words of each function in the each corresponding technique domain by the total number of words of patent documents on each technical domain. For example, in the matrix of technical domain of design techniques of hanger and support frame that are corresponding to the functional domain of increase in steadiness, the new normalized numerical value is: (No.of fuctional words for functional domain of increase in steadiness)/█(No.of words of total patent documents about technical domain of design techniques of hanger and support frame@)
When the new normalized numerical value for one functional domain is lower, it represents that the function domain corresponding to this technical domain has not been developed in large amount. Therefore, this method can be used to carry out development of new patents. Finally, the paper takes LED track light as the carriers, and adds in new patent development rules. The paper also integrates the modified technical life cycle, DEMATEL causal diagram of technical domain, and core competitiveness trend chart of different companies, to conduct analysis. Through the above analysis, referential information focusing on the corresponding functional domains of a certain technical domain can be provided for development of new patents.
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