How to test the bad and dark spots of Panasonic th p50s 10c plasma TV? Thank you.

Panasonic [1] (formerly known as National, 1986, later gradually changed to Panasonic. In the 1980s, national black-and-white TV was only available in duty-free shopping malls. In addition, Technics is the trademark of Panasonic's high-fidelity HiFi equipment and professional products, and Panasonic also has a special trademark in the aviation field)./kloc-0 100060666606 Panasonic products mainly focus on digital audio-visual, small household appliances, office products, household appliances market and professional equipment in special fields. At present, Panasonic has more than 70 kinds of products, from electric toothbrushes and razors to radio and television equipment, with Panasonic's slogan of creative life, such as plasma TV, LCD TV, digital rear projection TV, flat-panel TV, digital camera, DVD burner, desktop DVD, portable DVD, mini speaker, video recorder and so on. Panasonic is also proud of its patent number and strong independent development capability. The utilization rate of its own components in household appliances is as high as 80-90%. Its notebook think Book and VIREA TV phones, which are not on the shelves in mainland China, are quite famous in Japan. Mobile phone is the first Japanese mobile phone manufacturer whose sales volume exceeds 654.38 billion. At present, P905i and P906i mobile phones are popular all over Japan, and they are expected to enter the China market in 2009. Chinese mainland official product catalogue:/[Edit this paragraph] Brief introduction of Panasonic Company Kōnosuke Matsushita, as an entrepreneur, has been engaged in business activities by providing goods and services with the business philosophy of "making people's lives richer and more comfortable and contributing to the development of world culture" since he started his business on 19 18. After more than 80 years of struggle, it has become a world-famous comprehensive large-scale electronic enterprise, and has carried out business activities in various countries around the world. Panasonic is a multinational company with more than 230 companies and more than 290,493 employees worldwide. There are more than 54,000 people in China. The total sales in 200 1 year reached 6 1 more than 100 million dollars, ranking 26th among the top 500 manufacturing enterprises in the world. Since Deng Xiaoping visited Matsushita Electric in 1978, Matsushita Electric began to invest in China, combining Panasonic's business in China with China's reform, opening up and economic construction. Up to now, there are more than 160 technical cooperation projects in China, and 53 joint ventures have been established (7 in Shanghai), with a total investment of nearly $654,380+0.5 billion. Matsushita Electric Industrial Co., Ltd. was founded in 19 18, and its founder is Mr. Kōnosuke Matsushita, who is known as the "God of Management". At the beginning, it was just a small workshop composed of three people. After several generations of efforts, it has now become a world-renowned international comprehensive electronic technology enterprise group. Since its establishment, it has always regarded "striving to improve and improve social life and contribute to the development of world culture" as its social mission and corporate program. In order to realize a richer social life and promote social development, Panasonic has actively carried out worldwide comprehensive research, development and commercial activities from basic technology, commodity technology to new production technology. Matsushita Electric unified the global brand to Panasonic, took "Panasonic Creative Life" as the brand slogan, realized the ideals of "dot network society" and "living in harmony with the earth's environment", and continued to make contributions to improving the cultural and living standards of people all over the world. Panasonic is currently engaged in the following businesses: digital AV network; Energy conservation and environmental protection; Digital communication service; System engineering design; Household appliances; Residential facilities; Air conditioning equipment business; Parts and components of industrial automation equipment and related undertakings; Network, software industry, etc. In these fields, Panasonic is engaged in product research and development, design, manufacturing, sales and after-sales service. The cooperation between Panasonic and China began at 1978. From technology introduction, investment in establishing joint ventures and wholly-owned enterprises to establishing R&D bases, Panasonic's business scale in China is expanding day by day. Up to now, Panasonic has invested and established 60 joint ventures and wholly-owned enterprises in China, including 4 R&D centers with more than 60,000 employees. Panasonic has bases in many countries in the world, and carries out global business activities that meet the local people, culture and needs. Matsushita Electric Co., Ltd. has spanned the region and society, and currently has enterprise activities in more than 40 countries. Its enterprise activities are not limited to production, but also carry out a variety of businesses, including services and information systems and other solutions. Moreover, product manufacturing and customer-oriented business activities that meet market demand in time are carried out on a global scale. More importantly, in order to meet the needs of customers from all over the world, the unified regional management organization originally located in Japan was moved to Beijing, Singapore, New Jersey, London and other places to directly carry out marketing activities there. As a truly international enterprise, Panasonic has always carried out global activities based on customers and made contributions to society. Panasonic History 19 18 Kōnosuke Matsushita entrepreneurs set up Matsushita Electric Factory in Otomachi, Fukushima, Osaka, and began to produce bulb sockets and double-bulb rotary sockets. In 2002, he established the first headquarters factory in Otani-CHO, Fukushima, Osaka, and developed and promoted bullet-shaped lamps for bicycles, using the agency system. Bicycle square lamp was developed in 1927 and sold nationwide. From the beginning of this product, 1929 used the trademark of "country", and the company name was changed to "Matsushita Electric Appliance Manufacturing Co., Ltd.". 193 1 year formulated the program and creed, and 1932 stipulated the anniversary of starting to produce radios and dry batteries. Announced the real mission of our company, established the Trade Department (1935 became Matsushita Electric Co., Ltd.), 1933 moved our factory to a new factory in Menzhen as the five spirits that Matsushita Electric should contribute to society (1937 changed to seven spirits), 1934 opened the "shop assistant (? In 438+0935, Matsushita Electric Co., Ltd. was established and the company was reorganized into a joint stock company. Matsushita Electric Industrial Co., Ltd. adopted the branch system (9 companies including Matsushita Wireless Co., Ltd. were established) 1938 started the import business through Matsushita Electric Trading Co., Ltd. 1940 held the first business policy meeting 1946 established the trade union organization 1952 cooperated with Nakagawa Machinery Co., Ltd. (now Matsushita Refrigerator) and the Netherlands. Established Panasonic 1953, opened the Central Research Institute, opened the new york office 1954, and cooperated with Japanese Victory Corporation (JVC) 1955 to establish Kyushu Matsushita Electric 1956 and Osaka Electric Seiko Co., Ltd. (now Panasonic Seiko)1. Started to set up nationwide 1958 to set up sales stores, 1959 to set up Panasonic Communication Industry Company, 1965438 to set up American Panasonic Company, 196 1 began to promote color TV, with Kōnosuke Matsushita as the president; Masaji Matsushita established the first foreign production plant in Thailand after World War II (1962) and cooperated with Dongfang Electric Co., Ltd. (now Matsushita Electric Drive System Co., Ltd.) 1968 Matsushita Electric History Museum officially opened 1969 Matsushita Electric Science and Technology Museum officially opened in Osaka (1970). The "Panasonic Pavilion" was set up in the Expo to display products such as "time data register". 197 1 Consumer consultation centers have been set up in exhibition halls all over the country and listed on the NYSE. 1973, Kōnosuke Matsushita became a consultant. Gao Qiao's Arataro became president, with annual sales exceeding 65,438+0 trillion yen, 65,438+0,976, Panasonic Electronics Company was established, 65,438+0,977, and Matsushita Zhengren became president; Yamashita Junhiko became the president to establish Panasonic Residential Machinery Co., Ltd. and Panasonic Industrial Machinery Co., Ltd. 1979 to establish Panasonic Battery Industry Co., Ltd. 1986 Tanii Akio as the president; Yamashita Toshihiko became the president and began to use the Panasonic trademark in Japan. 1987 The financial year final accounts of the subsidiaries of Panasonic Group were unified to the end of March 1988, Panasonic Electric Industry Co., Ltd. merged with Matsushita Electric Co., Ltd. 1989, and Kōnosuke Matsushita, the founder of Matsushita Electric Co., Ltd., died at the age of 94 1990. Buy American MCA company 199 1 year to formulate the basic policy of environmental management (Panasonic Environmental Charter) 1993 Morishita Yoichi as the president; Tanii Akio took office as president and obtained the equity of Panasonic Electronic Industry Co., Ltd. 100% 1995. Panasonic Electric Industry Co., Ltd. merged with Panasonic Residential Machinery Co., Ltd. and transferred 80% of the holding shares of American MCA Company1996, and began to sell DVD players 1997, introducing the company branch system1997. 65438-0999 (Emphasis on Management of Capital Cost) CCM was introduced in 80 years. In 2000, Matsushita became honorary president; Morishita Yoichi became the president; Panasonic Masayuki became vice president; Nakamura Kuniwo took office on 200 1 and launched the "Creation 2 1 Plan". In 2006, Nakamura Kuniwo became president. On October 7th, 2008/KLOC-0, Panasonic announced its merger with Sanyo. China Matsushita Electric Co., Ltd. has exported various products and parts to China since 1978. On the other hand, it also provides production equipment and technology for AV appliances such as color TV sets and household appliances such as refrigerators, which promotes the localization process of these products. 1In September, 1987, Panasonic first established a joint venture company in China. Since then, sole proprietorship and joint venture companies have been established in a wide range of fields, from household appliances such as household air conditioners and washing machines to production equipment such as communication equipment, images, audio and semiconductors (up to now, 59 production-oriented joint ventures and sole proprietorships have been established). The products produced are very popular. Panasonic can achieve today's development, mainly due to the following six aspects as the guiding ideology for the establishment of a joint venture company.