公开(公告)号：GB2160730B

公开(公告)日：1987-07-29

申请号：GB8512544

申请日：1985-05-17

Applicant: CASIO COMPUTER CO LTD

Inventor： FUSE TAKAHIRO ,  KAWAMURA MASAO ,  YAMAGISHI KOJI ,  ODACHI KAZUYUKI ,  ONO HARUO ,  KIZAKI MASAHARU

IPC: H04N5/14 ,  G09G3/36 ,  H03M1/00 ,  H04N3/12 ,  H04N5/20 ,  H04N5/57 ,  H04N5/66 ,  H03M1/36 ,  H04N5/44

Abstract: A television video signal A/D converter apparatus in a liquid crystal television receiver has an A/D converter for A/D converting a television video signal. Upper and lower reference potentials for determining an operating voltage amplitude are supplied to the A/D converter from a reference potential generator. The upper and lower reference potentials are divided at a given ratio by a resistor so as to fix an average potential of the television video signal at a constant value using the potential at the dividing point as a bias potential, and thereafter the television video signal is supplied to the A/D converter.

公开(公告)号：HK78495A

公开(公告)日：1995-05-26

申请号：HK78495

申请日：1995-05-18

Applicant: CASIO COMPUTER CO LTD

Inventor： KAWAMURA MASAO ,  USUL MINORU

IPC: G09G3/36 ,  G02F1/133 ,  H04N3/12

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.

公开(公告)号：GB2161336B

公开(公告)日：1987-04-29

申请号：GB8512545

申请日：1985-05-17

Applicant: CASIO COMPUTER CO LTD

Inventor： YAMAGISHI KOJI ,  FUSE TAKAHIRO ,  KAWAMURA MASAO ,  MATSUI SHINICHI

IPC: H03M1/00 ,  H04N3/12 ,  H04N5/57 ,  H03M1/18

Abstract: A television video signal A/D converter apparatus has an A/D converter which samples a television video signal to A/D convert it in accordance with upper and lower reference potentials, and supplies the digital signals to a liquid crystal display device. The apparatus also has detectors which detect digital values of the digital signals from the A/D converter which exceed a predetermined value and are below another predetermined value, and which respectively correspond to the upper and lower reference potentials for A/D conversion by the A/D converter. The digital values exceeding and below the predetermined values are counted by a counter, and the upper and lower reference potentials are determined in accordance with the respective counts and are supplied to the A/D converter.

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

IPC: G02F1/133 ,  H04N3/12 ,  G09G3/36

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.

公开(公告)号：HK65589A

公开(公告)日：1989-08-25

申请号：HK65589

申请日：1989-08-17

Applicant: CASIO COMPUTER CO LTD

Inventor： KOBAYASHI SABURO ,  YABE NOBOL ,  KASHIYAMA SHUNJI ,  KAWAMURA MASAO ,  FUSE TAKAHIRO ,  HIRASAWA YUKINORI

IPC: G09F9/30 ,  H04N3/12 ,  H04N5/64 ,  H04N5/655 ,  H04N5/66 ,  G09G3/22 ,  H04N5/70

Abstract: A portable television reciever of the panel type, having a pocketable size, is provided with about 1/8 the number of scanning electrodes as effective T.V. picture scanning lines, and a panel type picture display device with a double matrix array in which two picture element electrodes lying on each of the signal electrodes commonly provided in the direction of the width of said scanning electrodes are disposed in opposition to each other. A display circuit is driven at a duty cycle expressed as follows: where A is the number of fields constituting one frame, B is the number of horizontal periods for a video signal assigned to a scanning electrode; and C is the number of scanning lines.

公开(公告)号：GB2124816B

公开(公告)日：1986-10-15

申请号：GB8320219

申请日：1983-07-27

Applicant: CASIO COMPUTER CO LTD

Inventor： KOBAYASHI SABURO ,  YABE NOBOL ,  KASHIYAMA SHUNJI ,  KAWAMURA MASAO ,  FUSE TAKAHIRO ,  HIRASAWA YUKINORI

IPC: G09F9/30 ,  H04N3/12 ,  H04N5/64 ,  H04N5/655 ,  H04N5/66 ,  H04N5/70

Abstract: A portable television reciever of the panel type, having a pocketable size, is provided with about 1/8 the number of scanning electrodes as effective T.V. picture scanning lines, and a panel type picture display device with a double matrix array in which two picture element electrodes lying on each of the signal electrodes commonly provided in the direction of the width of said scanning electrodes are disposed in opposition to each other. A display circuit is driven at a duty cycle expressed as follows: where A is the number of fields constituting one frame, B is the number of horizontal periods for a video signal assigned to a scanning electrode; and C is the number of scanning lines.

公开(公告)号：GB2161336A

公开(公告)日：1986-01-08

申请号：GB8512545

申请日：1985-05-17

Applicant: CASIO COMPUTER CO LTD

Inventor： YAMAGISHI KOJI ,  FUSE TAKAHIRO ,  KAWAMURA MASAO ,  MATSUI SHINICHI

IPC: H03M1/00 ,  H04N3/12 ,  H04N5/57 ,  H03M1/18

Abstract: A television video signal A/D converter apparatus has an A/D converter which samples a television video signal to A/D convert it in accordance with upper and lower reference potentials, and supplies the digital signals to a liquid crystal display device. The apparatus also has detectors which detect digital values of the digital signals from the A/D converter which exceed a predetermined value and are below another predetermined value, and which respectively correspond to the upper and lower reference potentials for A/D conversion by the A/D converter. The digital values exceeding and below the predetermined values are counted by a counter, and the upper and lower reference potentials are determined in accordance with the respective counts and are supplied to the A/D converter.

公开(公告)号：GB2160730A

公开(公告)日：1985-12-24

申请号：GB8512544

申请日：1985-05-17

Applicant: CASIO COMPUTER CO LTD

Inventor： FUSE TAKAHIRO ,  KAWAMURA MASAO ,  YAMAGISHI KOJI ,  ODACHI KAZUYUKI ,  ONO HARUO ,  KIZAKI MASAHARU

IPC: H04N5/14 ,  G09G3/36 ,  H03M1/00 ,  H04N3/12 ,  H04N5/20 ,  H04N5/57 ,  H04N5/66 ,  H03M1/36 ,  H04N5/44

Abstract: A television video signal A/D converter apparatus in a liquid crystal television receiver has an A/D converter for A/D converting a television video signal. Upper and lower reference potentials for determining an operating voltage amplitude are supplied to the A/D converter from a reference potential generator. The upper and lower reference potentials are divided at a given ratio by a resistor so as to fix an average potential of the television video signal at a constant value using the potential at the dividing point as a bias potential, and thereafter the television video signal is supplied to the A/D converter.

公开(公告)号：GB2124816A

公开(公告)日：1984-02-22

申请号：GB8320219

申请日：1983-07-27

Applicant: CASIO COMPUTER CO LTD

Inventor： KOBAYASHI SABURO ,  YABE NOBOL ,  KASHIYAMA SHUNJI ,  KAWAMURA MASAO ,  FUSE TAKAHIRO ,  HIRASAWA YUKINORI

IPC: G09F9/30 ,  H04N3/12 ,  H04N5/64 ,  H04N5/655 ,  H04N5/66 ,  H04N5/70

Abstract: A portable television reciever of the panel type, having a pocketable size, is provided with about 1/8 the number of scanning electrodes as effective T.V. picture scanning lines, and a panel type picture display device with a double matrix array in which two picture element electrodes lying on each of the signal electrodes commonly provided in the direction of the width of said scanning electrodes are disposed in opposition to each other. A display circuit is driven at a duty cycle expressed as follows: where A is the number of fields constituting one frame, B is the number of horizontal periods for a video signal assigned to a scanning electrode; and C is the number of scanning lines.

公开(公告)号：DE3518433A1

公开(公告)日：1985-11-28

申请号：DE3518433

申请日：1985-05-22

Applicant: CASIO COMPUTER CO LTD

Inventor： FUSE TAKAHIRO ,  KAWAMURA MASAO ,  YAMAGISHI KOJI ,  ODACHI KAZUYUKI ,  ONO HARUO ,  KIZAKI MASAHARU

IPC: H04N5/14 ,  G09G3/36 ,  H03M1/00 ,  H04N3/12 ,  H04N5/20 ,  H04N5/57 ,  H04N5/66 ,  H04N9/77

Abstract: A television video signal A/D converter apparatus in a liquid crystal television receiver has an A/D converter for A/D converting a television video signal. Upper and lower reference potentials for determining an operating voltage amplitude are supplied to the A/D converter from a reference potential generator. The upper and lower reference potentials are divided at a given ratio by a resistor so as to fix an average potential of the television video signal at a constant value using the potential at the dividing point as a bias potential, and thereafter the television video signal is supplied to the A/D converter.