Patents by Inventor Kenji Shino
Kenji Shino has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20060256101Abstract: A scanning circuit and an image display device in which the influence of losses in a signal path to scanning wiring and a scanning signal output circuit can be reduced. By considering matrix drive in which one row is driven at a time and two or more of the rows are not simultaneously driven, the 480 rows are divided into six modules and one feedback circuit is provided in correspondence with each module to perform feedback control of the output buffers corresponding to 80 rows. An output from a switch is amplified by an operational amplifier and is input as a compensation signal to all the output buffers by an output voltage compensation circuit. Compensation for a voltage drop is made by using the compensation signal for an increase in voltage such that the apparent voltage drop due to the output current is limited to a small value.Type: ApplicationFiled: July 24, 2006Publication date: November 16, 2006Applicant: Canon Kabushiki KaishaInventors: Kenji Shino, Tadashi Aoki, Aoji Isono, Kazuhiko Murayama
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Publication number: 20060250345Abstract: A scanning circuit having a plurality of output units each outputs an ON potential sequentially, comprises: a first output unit that changes an ON potential to an OFF potential during a first period; and a second output unit that changes the OFF potential to the ON potential during a second period, wherein at least part of the first period and at least part of the second period overlap.Type: ApplicationFiled: April 19, 2006Publication date: November 9, 2006Applicant: Canon Kabushiki KaishaInventors: Kenji Shino, Yasukazu Noine
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Patent number: 7126597Abstract: A scanning circuit and an image display device in which the influence of losses in a signal path to scanning wiring and a scanning signal output circuit can be reduced. By considering matrix drive in which one row is driven at a time and two or more of the rows are not simultaneously driven, the 480 rows are divided into six modules and one feedback circuit is provided in correspondence with each module to perform feedback control of the output buffers corresponding to 80 rows. An output from a switch is amplified by an operational amplifier and is input as a compensation signal to all the output buffers by an output voltage compensation circuit. Compensation for a voltage drop is made by using the compensation signal for an increase in voltage such that the apparent voltage drop due to the output current is limited to a small value.Type: GrantFiled: July 30, 2002Date of Patent: October 24, 2006Assignee: Canon Kabushiki KaishaInventors: Kenji Shino, Tadashi Aoki, Aoji Isono, Kazuhiko Murayama
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Publication number: 20060227078Abstract: The present invention can provide a driving apparatus capable of compensating an influence of a voltage drop at low costs in a simple manner, which includes: a column driver circuit that generates at least one of modulation signals different in start reference time in one horizontal scanning period and the modulation signals obtained by using pulse width modulation and voltage amplitude modulation in combination; and a correction circuit that corrects a voltage of the row selection signal so as to suppress a voltage variation of the row selection signal, which is caused due to at least a resistance of an output stage of the row driver circuit and a current caused to flow into the resistance.Type: ApplicationFiled: June 9, 2006Publication date: October 12, 2006Inventors: Kenji Shino, Tadashi Aoki, Aoji Isono, Kazuhiko Murayama, Yasuhiko Sano
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Patent number: 7079123Abstract: The present invention can provide a driving apparatus capable of compensating an influence of a voltage drop at low costs in a simple manner, which includes: a column driver circuit that generates at least one of modulation signals different in start reference time in one horizontal scanning period and the modulation signals obtained by using pulse width modulation and voltage amplitude modulation in combination; and a correction circuit that corrects a voltage of the row selection signal so as to suppress a voltage variation of the row selection signal, which is caused due to at least a resistance of an output stage of the row driver circuit and a current caused to flow into the resistance.Type: GrantFiled: June 13, 2003Date of Patent: July 18, 2006Assignee: Canon Kabushiki KaishaInventors: Kenji Shino, Tadashi Aoki, Aoji Isono, Kazuhiko Murayama, Yasuhiko Sano
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Publication number: 20060050030Abstract: The present invention discloses an invention about a drive waveform for driving an image display unit. In particular, the present invention discloses the structure of using as a drive waveform a drive waveform signal which is level controlled by a plural of discontinuous levels including a minimum level which is a level corresponding to luminance brightness gradation data which is not 0, at least one non-minimum level which is a level corresponding to larger luminance brightness gradation data, and an intermediate level between the above-described minimum level and the above-described non-minimum level, and is given pulse width control with discontinuous pulse width, and which has a portion, which is controlled with the above-described minimum level, in its trailing edge, and a portion, which is controlled with the above-described intermediate level just before the former portion, when it has the portion controlled by the above-described non-minimum level.Type: ApplicationFiled: November 2, 2005Publication date: March 9, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Tadashi Aoki, Kazunori Katakura, Aoji Isono, Kazuhiko Murayama, Kenji Shino
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Patent number: 6995516Abstract: A drive waveform signal which is level controlled by discontinuous levels including a minimum level corresponding to luminance brightness gradation data which is not 0, at least one non-minimum level corresponding to larger luminance brightness gradation data, and an intermediate level between the minimum and non-minimum level. The signal, which is employed to drive an image display unit, is given pulse width control with discontinuous pulse width, and has a portion, controlled with the minimum level, in its trailing edge, and a portion, controlled with the intermediate level just before the former portion, when it has the portion controlled by the non-minimum level.Type: GrantFiled: June 13, 2002Date of Patent: February 7, 2006Assignee: Canon Kabushiki KaishaInventors: Tadashi Aoki, Kazunori Katakura, Aoji Isono, Kazuhiko Murayama, Kenji Shino
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Publication number: 20060007211Abstract: An image display apparatus having a plurality of image forming devices. In an output circuit provided between constant voltage supplies and wiring for driving each of the image forming devices, MOSFETs are successively turned on from the one having a higher ON resistance at the time of switching to make a stepwise transition between outputs from the constant voltage supplies, and have steady potential, thereby limiting undesirable variation in signal potential at the time of switching.Type: ApplicationFiled: May 13, 2005Publication date: January 12, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiko Murayama, Tadashi Aoki, Aoji Isono, Kenji Shino
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Publication number: 20050285882Abstract: Reduction of a display period due to blank shift of a shift register is eliminated. To achieve this, a driving device of a display panel comprises a scanning driver of sequentially selecting scanning wirings by sequentially transferring a selection signal by using the shift register, and a controller of giving the selection signal to the shift register. The controller gives the shift data for scanning (n+1)-th field to the shift register while the shift register is transferring the shift data for scanning n-th field.Type: ApplicationFiled: June 15, 2005Publication date: December 29, 2005Applicant: Canon Kabushiki KaishaInventor: Kenji Shino
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Patent number: 6970162Abstract: An image display apparatus having a plurality of image forming devices. In an output circuit provided between constant voltage supplies and wiring for driving each of the image forming devices, MOSFETs are successively turned on from the one having a higher ON resistance at the time of switching to make a stepwise transition between outputs from the constant voltage supplies, and have steady potential, thereby limiting undesirable variation in signal potential at the time of switching.Type: GrantFiled: August 5, 2002Date of Patent: November 29, 2005Assignee: Canon Kabushiki KaishaInventors: Kazuhiko Murayama, Tadashi Aoki, Aoji Isono, Kenji Shino
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Patent number: 6946799Abstract: A drive circuit includes a drive transistor connected at a pair of its main electrodes respectively to a drive output terminal side and a reference voltage source VEE side, an operational amplifier for controlling an output voltage that is output from the drive transistor, a detection transistor for detecting a current that flows through the drive transistor, a first feedback loop for detecting an output voltage at the drive output terminal and feeding back the output voltage to the operational amplifier, and a second feedback loop for detecting an output current of the detection transistor and feeding back the output current to the operational amplifier. The drive transistor and the detection transistor form a mirror circuit.Type: GrantFiled: January 30, 2004Date of Patent: September 20, 2005Assignees: Canon Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Kenji Shino, Yasukazu Noine
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Patent number: 6882329Abstract: A drive signal generation circuit which performs gradation control on a load by a drive signal having a stepped waveform. In a case where the wave height value corresponding to input gradation data is Vm (2?m?n), the drive signal is caused to rise in such a manner that each output Vk (2?k?m) is produced one slot after the output V(k?1) to increase the wave height value V0 (reference potential) to Vm in a stepping manner. One slot corresponds to a unit time of the pulse width modulation. The drive signal is caused to fall in such a manner that each output V(k?1) (1?k?m?1) is produced one or two slots after the output Vk to reduce the wave height value from Vm to off level in a stepping manner. A delay circuit is used to delay signals slot by slot. A selection is made from delayed signals according to luminance data to determine a waveform. The circuit is also designed to enable the drive signal waveform rise position to be changed.Type: GrantFiled: September 27, 2002Date of Patent: April 19, 2005Assignees: Canon Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Aoji Isono, Tadashi Aoki, Kazuhiko Murayama, Kenji Shino, Tsutomu Sakamoto
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Publication number: 20040217950Abstract: A drive circuit includes a drive transistor connected at a pair of its main electrodes respectively to a drive output terminal side and a reference voltage source VEE side, an operational amplifier for controlling an output voltage that is output from the drive transistor, a detection transistor for detecting a current that flows through the drive transistor, a first feedback loop for detecting an output voltage at the drive output terminal and feeding back the output voltage to the operational amplifier, and a second feedback loop for detecting an output current of the detection transistor and feeding back the output current to the operational amplifier. The drive transistor and the detection transistor form a mirror circuit.Type: ApplicationFiled: January 30, 2004Publication date: November 4, 2004Applicants: CANON KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Kenji Shino, Yasukazu Noine
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Patent number: 6809480Abstract: Even if an output voltage from a high-voltage power source includes a ripple, this invention reduces the influence on a luminance output and suppresses the capacitances of a high-voltage power source transformer and smoothing capacitor. An electron-beam apparatus adopts line-sequential driving of allowing a plurality of electron-emitting devices to simultaneously emit electrons in an arrangement in which an accelerating potential for accelerating electrons includes a ripple. At the same time, sets of devices allowed to simultaneously emit electrons are sequentially switched. The frequency of the ripple is synchronized with the selection frequency of line-sequential driving.Type: GrantFiled: March 28, 2002Date of Patent: October 26, 2004Assignee: Canon Kabushiki KaishaInventor: Kenji Shino
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Publication number: 20040032405Abstract: A modulator circuit (102) is capable of outputting n kinds of unit pulses with the identical width and with peak values A1 to An and controls the peak value and width of a modulation signal through changing the kind and the number of output unit pulses in accordance with luminance data. In case of outputting more than one unit pulse with the maximal peak value out of unit pulses which comprise the modulation signal, the modulator circuit (102) makes the pulses appear dispersedly within an effective light emission time period. With such an arrangement, it is possible to suppress a decrease in display quality otherwise occurring due to voltage drop of row wirings.Type: ApplicationFiled: June 12, 2003Publication date: February 19, 2004Applicant: CANON KABUSHIKI KAISHAInventors: Tadashi Aoki, Aoji Isono, Kazuhiko Murayama, Kenji Shino, Yasuhiko Sano
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Publication number: 20040001039Abstract: The present invention can provide a driving apparatus capable of compensating an influence of a voltage drop at low costs in a simple manner, which includes: a column driver circuit that generates at least one of modulation signals different in start reference time in one horizontal scanning period and the modulation signals obtained by using pulse width modulation and voltage amplitude modulation in combination; and a correction circuit that corrects a voltage of the row selection signal so as to suppress a voltage variation of the row selection signal, which is caused due to at least a resistance of an output stage of the row driver circuit and a current caused to flow into the resistance.Type: ApplicationFiled: June 13, 2003Publication date: January 1, 2004Applicant: CANON KABUSHIKI KAISHAInventors: Kenji Shino, Tadashi Aoki, Aoji Isono, Kazuhiko Murayama, Yasuhiko Sano
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Publication number: 20030063108Abstract: A drive signal generation circuit which performs gradation control on a load by a drive signal having a stepped waveform. In a case where the wave height value corresponding to input gradation data is Vm (2≦m≦n), the drive signal is caused to rise in such a manner that each output Vk (2≦k≦m) is produced one slot after the output V(k−1) to increase the wave height value V0 (reference potential) to Vm in a stepping manner. One slot corresponds to a unit time of the pulse width modulation. The drive signal is caused to fall in such a manner that each output V(k−1) (1≦k≦m−1) is produced one or two slots after the output Vk to reduce the wave height value from Vm to off level in a stepping manner. A delay circuit is used to delay signals slot by slot. A selection is made from delayed signals according to luminance data to determine a waveform. The circuit is also designed to enable the drive signal waveform rise position to be changed.Type: ApplicationFiled: September 27, 2002Publication date: April 3, 2003Inventors: Aoji Isono, Tadashi Aoki, Kazuhiko Murayama, Kenji Shino, Tsutomu Sakamoto
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Publication number: 20030038792Abstract: An image display apparatus having a plurality of image forming devices. In an output circuit provided between constant voltage supplies and wiring for driving each of the image forming devices, MOSFETs are successively turned on from the one having a higher ON resistance at the time of switching to make a stepwise transition between outputs from the constant voltage supplies, and have steady potential, thereby limiting undesirable variation in signal potential at the time of switching.Type: ApplicationFiled: August 5, 2002Publication date: February 27, 2003Inventors: Kazuhiko Murayama, Tadashi Aoki, Aoji Isono, Kenji Shino
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Publication number: 20030025687Abstract: A scanning circuit and an image display device in which the influence of losses in a signal path to scanning wiring and a scanning signal output circuit can be reduced. By considering matrix drive in which one row is driven at a time and two or more of the rows are not simultaneously driven, the 480 rows are divided into six modules and one feedback circuit is provided in correspondence with each module to perform feedback control of the output buffers corresponding to 80 rows. An output from a switch is amplified by an operational amplifier and is input as a compensation signal to all the output buffers by an output voltage compensation circuit. Compensation for a voltage drop is made by using the compensation signal for an increase in voltage such that the apparent voltage drop due to the output current is limited to a small value.Type: ApplicationFiled: July 30, 2002Publication date: February 6, 2003Inventors: Kenji Shino, Tadashi Aoki, Aoji Isono, Kazuhiko Murayama
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Publication number: 20020195966Abstract: The present invention discloses an invention about a drive waveform for driving an image display unit. In particular, the present invention discloses the structure of using as a drive waveform a drive waveform signal which is level controlled by a plural of discontinuous levels including a minimum level which is a level corresponding to luminance brightness gradation data which is not 0, at least one non-minimum level which is a level corresponding to larger luminance brightness gradation data, and an intermediate level between the above-described minimum level and the above-described non-minimum level, and is given pulse width control with discontinuous pulse width, and which has a portion, which is controlled with the above-described minimum level, in its trailing edge, and a portion, which is controlled with the above-described intermediate level just before the former portion, when it has the portion controlled by the above-described non-minimum level.Type: ApplicationFiled: June 13, 2002Publication date: December 26, 2002Inventors: Tadashi Aoki, Kazunori Katakura, Aoji Isono, Kazuhiko Murayama, Kenji Shino