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公开(公告)号：DE69216467D1
公开(公告)日：1997-02-20
申请号：DE69216467
申请日：1992-04-16
Applicant: CASIO COMPUTER CO LTD
Inventor： USUI MINORU , YAMAGISHI KOUJI , YOSHINO KEN , MORI HIDEKI , MOGI TOMOHIRO
Abstract: An image display circuit (11-13, 21-24, 92, 93) supplies gray scale data according to a video signal (RD) to a liquid crystal panel (20) to present gray-scaled display and scans the liquid crystal panel (20) N times during one field period of a video signal. The image display circuit includes a table ROM (77, 78) comparing current video signal with a previous video signal of one frame before, and generates gray scale data for N times in accordance with the comparison result. Gray scale data greater than the gray scale of the current video signal is generated when the comparison result indicates that the gray scale of the current video signal is greater than that of the previous video signal, and gray scale data smaller than the gray scale of the current video signal is generated when the gray scale of the current video signal is found smaller than that of the previous video signal. Based on the generated gray scale data, the liquid crystal panel (20) is driven with the proper gray scales.
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公开(公告)号：DE69121138T2
公开(公告)日：1997-01-09
申请号：DE69121138
申请日：1991-05-24
Applicant: CASIO COMPUTER CO LTD
Inventor： MOGI TOMOHIRO , USUI MINORU
Abstract: In a liquid crystal display device, to improve the contrast, the frame frequency is raised by scanning the scanning electrodes (X) of the liquid crystal display panel (17) a plurality of times during one field interval of the video signal. The scanning electrodes (X) are divided into two groups, which are scanned alternately. An image memory (M) is provided to store video signals. In scanning the liquid crystal display panel (17), the video signal from the video signal supplying source (11) and the video signal read from the image memory (M) are alternately supplied to the liquid crystal display panel. The image memory (M) stores only part of the video signal such as the video signal for every other horizontal interval or the signal consisting of the most significant bit only, not the entire video signal.
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公开(公告)号：SG26396G
公开(公告)日：1995-09-01
申请号：SG1995906533
申请日：1986-09-18
Applicant: CASIO COMPUTER CO LTD
Inventor： KAWAMURA MASAO , USUI MINORU
Abstract: In the signal electrode drive apparatus for use in a liquid crystal display, the signal electrode drive circuit (3a) for driving a liquid crystal display panel (LCD) is comprised of a latch circuit (2l) for latching a digitized video signal, a buffer (22), a graduation signal-forming circuit (23), an intensity modulation pulse-generating circuit (25), and an analog multiplexer (24). The latch circuit (2l) holds the video data only once during one horizontal scanning period till the next latch pulse M is generated, thus considerably reducing current dissipation.
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公开(公告)号：GB2120441B
公开(公告)日：1986-05-08
申请号：GB8307067
申请日：1983-03-15
Applicant: CASIO COMPUTER CO LTD
Inventor： USUI MINORU
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公开(公告)号：GB2120441A
公开(公告)日：1983-11-30
申请号：GB8307067
申请日：1983-03-15
Applicant: CASIO COMPUTER CO LTD
Inventor： USUI MINORU
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Patent Agency Ranking
公开(公告)号：DE3309899A1
公开(公告)日：1983-09-29
申请号：DE3309899
申请日：1983-03-18
Applicant: CASIO COMPUTER CO LTD
Inventor： USUI MINORU
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公开(公告)号：DE3149897A1
公开(公告)日：1982-07-29
申请号：DE3149897
申请日：1981-12-16
Applicant: CASIO COMPUTER CO LTD
Inventor： USUI MINORU
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公开(公告)号：DE3149905A1
公开(公告)日：1982-07-08
申请号：DE3149905
申请日：1981-12-16
Applicant: CASIO COMPUTER CO LTD
Inventor： USUI MINORU
Abstract: Electronic equipment has a memory which stores input data to be displayed. The data read out from the memory is formed as a corresponding character pattern signal and is output from a character pattern generator. The character pattern signal generated by the character pattern generator is displayed in n characters at a display section in response to a first mode signal which is supplied by a mode switching section. The mode switching section supplies different display mode signals determined by the contents of the data to be displayed. The character pattern signal from the character pattern generator is displayed in m characters (n
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公开(公告)号：GB2164190A
公开(公告)日：1986-03-12
申请号：GB8521384
申请日：1985-08-28
Applicant: CASIO COMPUTER CO LTD
Inventor： AOKI TSUYOSHI , KOBAYASHI SABURO , USUI MINORU , ODAKE RYOTA
Abstract: An image display apparatus having an A/D converter which samples a television signal a plurality of times in each horizontal effective display period and converts the sampled signal into digital data, and a gradation signal generator combines gradation signals produced in a plurality of horizontal effective display periods according to the digital data to produce a new gradation signal. An image display panel is driven for display according to the new gradation signal.
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公开(公告)号：DE69216467T2
公开(公告)日：1997-04-24
申请号：DE69216467
申请日：1992-04-16
Applicant: CASIO COMPUTER CO LTD
Inventor： USUI MINORU , YAMAGISHI KOUJI , YOSHINO KEN , MORI HIDEKI , MOGI TOMOHIRO
Abstract: An image display circuit (11-13, 21-24, 92, 93) supplies gray scale data according to a video signal (RD) to a liquid crystal panel (20) to present gray-scaled display and scans the liquid crystal panel (20) N times during one field period of a video signal. The image display circuit includes a table ROM (77, 78) comparing current video signal with a previous video signal of one frame before, and generates gray scale data for N times in accordance with the comparison result. Gray scale data greater than the gray scale of the current video signal is generated when the comparison result indicates that the gray scale of the current video signal is greater than that of the previous video signal, and gray scale data smaller than the gray scale of the current video signal is generated when the gray scale of the current video signal is found smaller than that of the previous video signal. Based on the generated gray scale data, the liquid crystal panel (20) is driven with the proper gray scales.
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