Patents Assigned to Hitachi Video and Information System, Incorporated
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Patent number: 6798460Abstract: A high definition display unit which demodulates, decodes, and processes in relation to chroma and displays a television signal in which a PI (picture) signal and an SI (service information) signal are mixed. A changeover switch 13 connected to an image quality adjusting circuit in a video chroma processing circuit 7 is opened or closed according to an on-off signal S1 showing the superposed period of both signals detected by a decoder 4. If the above on-off signal S1 is on, the changeover switch 13 is opened and the adjustment of image quality is disabled. Therefore, SI display never disappears due to the adjustment of image quality, and the quality of an image can be also adjusted according to an ambient status. Other approaches are also disclosed from preventing image quality adjustment of at least portions of a displayed image containing an information image.Type: GrantFiled: February 19, 2003Date of Patent: September 28, 2004Assignees: Hitachi, Ltd., Hitachi Video and Information System, IncorporatedInventors: Yukimi Saiki, Masahisa Tsukahara, Toshimitsu Watanabe, Kazuhiko Yoshizawa
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Patent number: 6563546Abstract: A high definition display unit which demodulates, decodes, and processes in relation to chroma and displays a television signal in which a PI (picture) signal and an SI (service information) signal are mixed. A changeover switch 13 connected to an image quality adjusting circuit in a video chroma processing circuit 7 is opened or closed according to an on-off signal SI showing the superposed period of both signals detected by a decoder 4. If the above on-off signal SI is on, the changeover switch 13 is opened and the adjustment of image quality is disabled. Therefore, SI display never disappears due to the adjustment of image quality, and the quality of an image can be also adjusted according to an ambient status. Other approaches are also disclosed from preventing image quality adjustment of at least portions of a displayed image containing an information image.Type: GrantFiled: March 29, 2002Date of Patent: May 13, 2003Assignees: Hitachi, Ltd., Hitachi Video and Information System, IncorporatedInventors: Yukimi Saiki, Masahisa Tsukahara, Toshimitsu Watanabe, Kazuhiko Yoshizawa
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Patent number: 6433832Abstract: When a video signal is double-speed processed by the first device, a slight vertical deflection process is performed for redundant similar scan lines by the second device, and any slight deflection in the second device is controlled by the first device to enable setting so as to display images with excellent resolution. The first device generates a discrimination signal to designate interlaced scanning and flag a need for vertical scan-line deflection, and such signal is provided to the second device such that the second device can always appropriately determine need for vertical scan-line deflection. Through monitoring for the discrimination signal, an image display apparatus can prevent vertical resolution from deteriorating when video signals possibly requiring vertical line-shifting are inputted from an external source, and can prevent vertical resolution from deteriorating when displaying images of video signals having different systems within different areas on the same screen.Type: GrantFiled: June 11, 2001Date of Patent: August 13, 2002Assignees: Hitachi, Ltd., Hitachi Video and Information System, IncorporatedInventors: Toshimitsu Watanabe, Masahisa Tsukahara, Nobuaki Kabuto
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Patent number: 6388713Abstract: A high definition display unit which demodulates, decodes, and processes in relation to chroma and displays a television signal in which a PI (picture) signal and an SI (service information) signal are mixed. A changeover switch 13 connected to an image quality adjusting circuit in a video chroma processing circuit 7 is opened or closed according to an on-off signal S1, showing the superposed period of both signals detected by a decoder 4. If the above on-off signal S1 is on, the changeover switch 13 is opened and the adjustment of image quality is disabled. Therefore, SI display never disappears due to the adjustment of image quality, and the quality of an image can be also adjusted according to an ambient status. Other approaches are also disclosed from preventing image quality adjustment of at least portions of a displayed image containing an information image.Type: GrantFiled: July 14, 1998Date of Patent: May 14, 2002Assignees: Hitachi, Ltd., Hitachi Video and Information System, IncorporatedInventors: Yukimi Saiki, Masahisa Tsukahara, Toshimitsu Watanabe, Kazuhiko Yoshizawa
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Patent number: 6239845Abstract: A television receiver and a signal receiving method thereof includes a terminal for connecting the television receiver to a personal computer for inputting information from the personal computer to the television receiver, a display for displaying a television signal, an input operation means, such as a remote controller, for generating a command signal, and a controller supplied with the command signal for controlling the personal computer and for inputting the information from the personal computer through the terminal to the television receiver for converting the television receiver from a television mode to a personal computer mode for displaying the information on a screen of said display. Advantageously, the personal computer and the television receiver are controlled by a command signal from the input operation means.Type: GrantFiled: August 19, 1997Date of Patent: May 29, 2001Assignees: Hitachi, Ltd., Hitachi Video and Information System, IncorporatedInventors: Tsuguo Itagaki, Chihiro Ikeda, Akira Kitazume
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Patent number: 5272421Abstract: An image correction device includes a memory (70) for storing correction data, an address generator (15,31) for supplying addresses to the memory, a regulation pattern generator (40), a DA converter (71) for converting an output of the memory into an analog signal, convergence yoke (CY) coils (74), CY drive amplifiers (73) for converting the analog signal into current for driving the CY coils, a CPU (20) for controlling operation of the image correction device, deflection current detection circuits (10,11) for reading vertical and horizontal deflection currents in the CPU and a memory (60) for storing correction data and deflection currents.Type: GrantFiled: August 27, 1992Date of Patent: December 21, 1993Assignees: Hitachi, Ltd., Hitachi Video and Information System, IncorporatedInventors: Yuichiro Kimura, Kuninori Matsumi, Michitaka Ohsawa