Between 2002 and 2007, the number of patent applications for TFT-LCD drive technology in China increased dramatically. In this area, the main technology is controlled by Japan, South Korea and a few US companies. Although mainland Chinese companies started late and have weak technical strength, they have also made some breakthroughs.
The recently released "Electronic Information Industry Adjustment and Revitalization Plan" listed the flat display industry as the core industry of three key breakthroughs. In the field of TFT-LCD (Thin Film Transistor Liquid Crystal Display) with the largest market share in the tablet market, the liquid crystal panel and the driving circuit occupy the largest share of the cost of the entire liquid crystal display, and the technology exhibits strong agglomeration. To this end, this study selected the TFT-LCD driver circuit for patent investigation and analysis. According to the search, as of October 15, 2008, there were 694 Chinese patents (including patent applications) related to the drive circuit in the TFT-LCD field.
Apply for the accelerated growth of the number of Chinese patents
Figure 1 is a bar graph showing the number of patent applications and the number of patentees in the Chinese patent as a function of the year of application.
It can be seen from the figure that during the period from 1995 to 2001, the number of patent applications for TFT-LCD drive technology in China increased gradually, but the increase rate was slow. Between 2002 and 2007, the number of patent applications for TFT-LCD drive technology in China increased dramatically, and TFT-LCD drive technology is in the development stage in China.
Between 1995 and 2001, the number of patent holders of TFT-LCD drive technology increased slowly year by year. From 2002 to 2006, the number of patent holders of TFT-LCD drive technology increased.
Figure 2 is a development trend chart of IPC classification of Chinese patents. The number of patents in the arrows in the figure are G02F1/133, G02F1/136, G02F1/1362, G09G3/20, G09G3/30, G09G3/32, G09G3/36. . It can be seen from the figure that the proportion according to the IPC classification is: G09G3/36 (only control devices and circuits connected to visual indicators other than cathode ray tubes are considered, for selecting individual characters from many characters or by individual The combination of components constitutes a character to display a single character, which controls the illumination from an independent light source, and the application of liquid crystal accounts for 36%. G02F1/133 (device based on liquid crystal structure, operation of liquid crystal tube, circuit device) accounts for 21%, G02F1 /1362 (active matrix addressing unit) accounted for 15%, G09G3/20 (graphic image conversion in the image plane, linear conversion of all or part of the graphics) accounted for 10%, G09G3/30 (digital analog conversion device and method) 8%, G02F1/136 (structured with a semiconductor layer or substrate combined with liquid crystal tube) accounted for 6%, G09G3/32 (source drive device and its driving method, display device) accounted for 4%, G09G5/00 (image enhancement or restoration) accounted for 1%.
The technology on the G09G3/36 classification developed earlier, and the number of patents has increased year by year, especially in the last three years. Considering the 18-month period of Chinese patent disclosure, some patents were not disclosed in 2008, so the 2008 data is not used as the basis for analysis, but it is predicted that the increase in the number of patents in the first three years should be continued in 2008.
The technology development of the G02F1/1362 classification is relatively late, but the number of patents has increased rapidly year by year. The rapid increase in the number of patents in 2007 and 2008 indicates that the technology in this field has developed rapidly in the last two years and is worthy of attention.
Japanese and Korean companies control TFT-LCD drive technology
Figure 3 is a technical development trend chart of the patentee of the Chinese patent. The arrows in the direction of the arrow are the patents of Samsung, Seiko Epson, AU Optronics, Innolux, Quncom, Sony, Sharp, and Chi Mei. In terms of quantity, Samsung Corporation is in a leading position in this field, with a total of 122 pieces.
In the field of TFT-LCD drive technology, Samsung Electronics Co., Ltd. has the fastest development rate, from one in 1999 to 43 in 2007. Taking into account the 18-month period of Chinese patent disclosure, the 2008 data is also not used as the basis for analysis, but it is expected that the company will continue to increase the number of patents in the first three years in 2008.
The technology development of Seiko Epson Co., Ltd. was earlier, among which the three most patents were 2001 (11 pieces), 2003 (14 pieces), and 2004 (11 pieces). In the next few years, the number of applications Gradually falling back. The technology of Innolux Optoelectronics Co., Ltd. started late, but the development speed is relatively fast. The number of patent applications has declined this year. Shanghai Radio and Television Optoelectronics started later than companies in Japan, South Korea and Taiwan, but the number of patents has increased year by year. Among them, 1 in 2006 and 5 in 2007, it is predicted that the number of patents in the first two years should be continued in 2008. increase speed. The situation of BOE and Longteng Optoelectronics is similar to that of Shanghai Radio and Television. The technology starts relatively late, but the number of patents is increasing year by year.
In the field of TFT-LCD drive technology, the top 5 companies applying for patents in China are Samsung Electronics Co., Ltd., Seiko Epson Co., Ltd., AU Optronics Co., Ltd., Innolux Optoelectronics Co., Ltd., Qunkang Technology (Shenzhen) Co., Ltd. the company. Among them, Samsung Electronics Co., Ltd. has the strongest comprehensive strength, both in terms of the number of patent applications and the number of inventors, which are much larger than other companies. Seiko Epson Co., Ltd. has more inventors than AU Optronics Co., Ltd., but the number of patent applications is slightly less than that of AUO Optoelectronics Co., Ltd., and the number and invention of patents of Innolux Optoelectronics Co., Ltd. and Qunkang Technology (Shenzhen) Co., Ltd. The number of people is not as good as AU Optronics Co., Ltd.
It can be seen from the above analysis that in the field of TFT-LCD drive technology, the main technology is mastered by Japan, South Korea and a few US companies. These companies have applied for patents from China since the early 1990s, and apply over time. The number of patents has increased year by year. In particular, in recent years, China's TFT-LCD production lines have been mass-produced, and the number of patent applications by these companies in relevant key technology fields has increased dramatically. In contrast, due to the relatively late start of technology in mainland China, the technical strength is also weak, and the number of patent applications is small. The current TFT-LCD driver chip will be developed to a higher level of integration. The product has been developed from 0.35μm and 0.18μm to 0.13μm. China's mainland driver IC company is working towards 480 channels and 720 channels. Overdrive technology and charge partial pressure technology are key technological breakthroughs. It is worth noting that companies such as New Phase Microelectronics, Tianli Semiconductor and Jingmen Technology of Hong Kong have made great breakthroughs in technology and market, which will bring new opportunities to the industry.
The recently released "Electronic Information Industry Adjustment and Revitalization Plan" listed the flat display industry as the core industry of three key breakthroughs. In the field of TFT-LCD (Thin Film Transistor Liquid Crystal Display) with the largest market share in the tablet market, the liquid crystal panel and the driving circuit occupy the largest share of the cost of the entire liquid crystal display, and the technology exhibits strong agglomeration. To this end, this study selected the TFT-LCD driver circuit for patent investigation and analysis. According to the search, as of October 15, 2008, there were 694 Chinese patents (including patent applications) related to the drive circuit in the TFT-LCD field.
Apply for the accelerated growth of the number of Chinese patents
Figure 1 is a bar graph showing the number of patent applications and the number of patentees in the Chinese patent as a function of the year of application.
It can be seen from the figure that during the period from 1995 to 2001, the number of patent applications for TFT-LCD drive technology in China increased gradually, but the increase rate was slow. Between 2002 and 2007, the number of patent applications for TFT-LCD drive technology in China increased dramatically, and TFT-LCD drive technology is in the development stage in China.
Between 1995 and 2001, the number of patent holders of TFT-LCD drive technology increased slowly year by year. From 2002 to 2006, the number of patent holders of TFT-LCD drive technology increased.
Figure 2 is a development trend chart of IPC classification of Chinese patents. The number of patents in the arrows in the figure are G02F1/133, G02F1/136, G02F1/1362, G09G3/20, G09G3/30, G09G3/32, G09G3/36. . It can be seen from the figure that the proportion according to the IPC classification is: G09G3/36 (only control devices and circuits connected to visual indicators other than cathode ray tubes are considered, for selecting individual characters from many characters or by individual The combination of components constitutes a character to display a single character, which controls the illumination from an independent light source, and the application of liquid crystal accounts for 36%. G02F1/133 (device based on liquid crystal structure, operation of liquid crystal tube, circuit device) accounts for 21%, G02F1 /1362 (active matrix addressing unit) accounted for 15%, G09G3/20 (graphic image conversion in the image plane, linear conversion of all or part of the graphics) accounted for 10%, G09G3/30 (digital analog conversion device and method) 8%, G02F1/136 (structured with a semiconductor layer or substrate combined with liquid crystal tube) accounted for 6%, G09G3/32 (source drive device and its driving method, display device) accounted for 4%, G09G5/00 (image enhancement or restoration) accounted for 1%.
The technology on the G09G3/36 classification developed earlier, and the number of patents has increased year by year, especially in the last three years. Considering the 18-month period of Chinese patent disclosure, some patents were not disclosed in 2008, so the 2008 data is not used as the basis for analysis, but it is predicted that the increase in the number of patents in the first three years should be continued in 2008.
The technology development of the G02F1/1362 classification is relatively late, but the number of patents has increased rapidly year by year. The rapid increase in the number of patents in 2007 and 2008 indicates that the technology in this field has developed rapidly in the last two years and is worthy of attention.
Japanese and Korean companies control TFT-LCD drive technology
Figure 3 is a technical development trend chart of the patentee of the Chinese patent. The arrows in the direction of the arrow are the patents of Samsung, Seiko Epson, AU Optronics, Innolux, Quncom, Sony, Sharp, and Chi Mei. In terms of quantity, Samsung Corporation is in a leading position in this field, with a total of 122 pieces.
In the field of TFT-LCD drive technology, Samsung Electronics Co., Ltd. has the fastest development rate, from one in 1999 to 43 in 2007. Taking into account the 18-month period of Chinese patent disclosure, the 2008 data is also not used as the basis for analysis, but it is expected that the company will continue to increase the number of patents in the first three years in 2008.
The technology development of Seiko Epson Co., Ltd. was earlier, among which the three most patents were 2001 (11 pieces), 2003 (14 pieces), and 2004 (11 pieces). In the next few years, the number of applications Gradually falling back. The technology of Innolux Optoelectronics Co., Ltd. started late, but the development speed is relatively fast. The number of patent applications has declined this year. Shanghai Radio and Television Optoelectronics started later than companies in Japan, South Korea and Taiwan, but the number of patents has increased year by year. Among them, 1 in 2006 and 5 in 2007, it is predicted that the number of patents in the first two years should be continued in 2008. increase speed. The situation of BOE and Longteng Optoelectronics is similar to that of Shanghai Radio and Television. The technology starts relatively late, but the number of patents is increasing year by year.
In the field of TFT-LCD drive technology, the top 5 companies applying for patents in China are Samsung Electronics Co., Ltd., Seiko Epson Co., Ltd., AU Optronics Co., Ltd., Innolux Optoelectronics Co., Ltd., Qunkang Technology (Shenzhen) Co., Ltd. the company. Among them, Samsung Electronics Co., Ltd. has the strongest comprehensive strength, both in terms of the number of patent applications and the number of inventors, which are much larger than other companies. Seiko Epson Co., Ltd. has more inventors than AU Optronics Co., Ltd., but the number of patent applications is slightly less than that of AUO Optoelectronics Co., Ltd., and the number and invention of patents of Innolux Optoelectronics Co., Ltd. and Qunkang Technology (Shenzhen) Co., Ltd. The number of people is not as good as AU Optronics Co., Ltd.
It can be seen from the above analysis that in the field of TFT-LCD drive technology, the main technology is mastered by Japan, South Korea and a few US companies. These companies have applied for patents from China since the early 1990s, and apply over time. The number of patents has increased year by year. In particular, in recent years, China's TFT-LCD production lines have been mass-produced, and the number of patent applications by these companies in relevant key technology fields has increased dramatically. In contrast, due to the relatively late start of technology in mainland China, the technical strength is also weak, and the number of patent applications is small. The current TFT-LCD driver chip will be developed to a higher level of integration. The product has been developed from 0.35μm and 0.18μm to 0.13μm. China's mainland driver IC company is working towards 480 channels and 720 channels. Overdrive technology and charge partial pressure technology are key technological breakthroughs. It is worth noting that companies such as New Phase Microelectronics, Tianli Semiconductor and Jingmen Technology of Hong Kong have made great breakthroughs in technology and market, which will bring new opportunities to the industry.
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