Sony Corporation

Atsushi Matsuzaki

Yoshiyuki Kondo

Takashi Okada

Hideo Tomita

Koichi Tagawa

Kiyonori Tominaga

Hiroyuki Kobayashi

Kenji Inoue

Yoshio Suzuki

Masami Yamashita

Takao Tsuchiya

Masakatsu Toyoshima

Ryota Odake

Kenichi Kikuchi

Yasunobu Kuniyoshi

Susumu Akazawa

Koji Ichida

Masatoshi Hirayasu

Atsushi Ichise

Mitsuo Kawamata

Shouji Omori

Shoji Ohmori

Mitsumasa Saito

Satoshi Ohno

A flat display apparatus having improved luminance, contrast and response of display, and applicable for assembling a large flat display apparatus free from the discontinuity of display and having improved luminance, contrast and response of display. The flat display apparatus includes a plurality of signal electrodes divided into at least three regions; a plurality of scanning electrodes intersecting to the plurality of signal electrodes; and a plurality of displaying signal supplying circuits for independently supplying display signals to the signal electrodes in each divided region. The flat display apparatus may include a display panel in which a plurality of signal electrodes and a plurality of scanning electrodes are intersected. The signal electrodes are divided into two or more regions, and a plurality of feeding portions for supplying signal to the signal electrodes are provided on a rear surface of the display panel.

Flat display apparatus

A projector including a projector to superpose pictures on a screen, the pictures being displayed on cathode ray tubes corresponding to different colors. Reference signals are inputted to the corresponding cathode ray tubes for a predetermined period of time after application of power so that one of both a picture with a uniform brightness and a picture with a uniform color is formed all over the screen in response to the reference signals. The projector effectively reduces the fluctuation in registration of the displayed pictures.

Image registration system for multiple picture tube projection television

A television receiver for providing a non-interlaced display of a received television signal intended for interlaced display includes a cathode ray tube having first and second cathodes, control grids and a fluorescent screen, a circuit for applying a first video signal to the first cathode such that the first cathode emanates a first electron beam in response to the first video signal, a circuit for applying a second video signal to the second cathode such that the second cathode emanates a second electron beam in response to the second video signal, a deflection device for horizontally and vertically deflecting the first and second electron beams from the first and second cathodes simultaneously and a deflection compensating device provided between the first and second cathodes and the fluorescent screen for making the second electron beam impinge upon the fluorescent screen between the lines scanned by the first electron beam such that the second electron beam forms a visual display with lines 1/2 line interval apart, in the vertical direction, from a visual display formed by the first electron beam. The first and second video signals fed to the first and second cathodes are the same in one embodiment. In other embodiments, the video signals fed to the two cathodes in one line may be the video signal for that one line and the average of the video signal for that one line and the video signal for the preceding or succeeding line, respectively.

Television receiver with two electron beams simultaneously scanning

A passenger vehicle polling system. The system is capable of polling one or more terminal units, where each terminal unit is provided at a different one of a plurality of passenger seats in a passenger vehicle, to obtain information indicative of the state of each terminal unit. The polling is accomplished by transmitting a polling command signal from a head end apparatus through a transmission line to the terminal units. Preferably, a sensor is mounted adjacent each passenger seat to sense the status of the passenger seat. The sensed information is transmitted as a polling answer signal through the transmission line to the head end apparatus so that the status of each passenger seat and the condition of each passenger can be checked from the head end apparatus. Further, a system according to the invention may transmit audio and video programs to the terminal units, and the polling answer signal may indicate which audio or video program has been selected at each terminal unit.

Passenger vehicle polling system having a central unit for polling

An information transmission system for transmitting signals from a transmitting side through a single transmission line to a plurality of terminal units. When the terminal units are interrupted by a command signal from the transmitting side, transmission of ordinary information signals to the terminal units is inhibited. When the terminal units are released from the interrupt mode, transmission of ordinary information signals automatically resumes, so that the ordinary information signals are reproduced from the point in time point at which they were interrupted. Normal operation of the terminal units is partially or totally inhibited during the interrupt mode. The system may be embodied in a passenger vehicle, in which a terminal unit is provided at each of a plurality of passenger seats.

Message delivery system operable in an override mode upon reception of a

A service and entertainment system for transmitting video signals, audio signals and television game software signals from a central transmitting apparatus to each of a plurality of terminal units mounted at respective passenger seats in a passenger vehicle such as aircraft or the like, or at respective seats in a stadium, a theater, or the like. The video signals, audio signals and television game software signals are frequency-multiplexed and then transmitted to the terminal units, so that desired ones of the frequency-multiplexed signals can be selected at each terminal unit.

Passenger service and entertainment system for supplying

A cathode ray tube beam current control apparatus for controlling the beam current in a plurality of cathode ray tubes each of which produce different colors wherein each of the cathode ray tubes have a current source circuit which is connected to a respective cathode of each of the cathode ray tubes and a current sink circuit which is connected to the cathode of each of the cathode ray tubes as well as a circuit for substracting the current of the current source circuit from the current of the current sink circuit and each cathode ray tube includes a control circuit which receives an input from the output of the circuit for subtracting and is connected to each of the cathode ray tubes so as to control their luminescence level.

Current control apparatus in which the beam current for all three colors

A multi-beam projector incorporates a cathode ray tube for each of the primary colors red, green and blue, with each cathode ray tube having two electron beams, with all of said electron beams being horizontally and vertically deflected in synchronism with each other. Primary color video signals are supplied to one cathode of each cathode ray tube for generating a first beam, and a delayed primary color video signal is supplied to the second cathode of each cathode ray tube for generating a second beam spaced from the first beam by a predetermined interval. The interval spacing between the beam of the cathode ray tube for the blue primary color is wider than the interval between the electron beams for the other cathode ray tubes.

Multi-beam projector with dual-beam cathode ray tubes

A video signal processing circuit is disclosed which has a wave-forming circuit for setting the level of an input video signal to a predetermined first D.C. level, which is higher than the pedestal level of the input video signal, at least during the blanking period of the input video signal, and producing a wave-formed signal; a peak-hold circuit for detecting and holding the level of the darkest peak of the wave-formed signal and producing a peak-hold output signal; and a black level control circuit controlled by the peak-hold output signal for controlling the D.C. level of the input video signal so that the darkest level of the input video signal coincides with a predetermined second D.C. level.

Video signal processing circuit

A video signal processing circuit for an input video signal having a DC level, a pedestal level, and a blanking period, includes a first clamp circuit for clamping the pedestal level of the input video signal to a first predetermined DC level in response to a clamp voltage supplied from a clamp voltage source, a blanking circuit for setting the level of the input video signal to a second predetermined DC level which is higher than the pedestal level of the input video signal during the blanking period of the input video signal and for producing a wave-formed signal, a peak-hold circuit for detecting and holding the darkest level of the wave-formed signal and for producing a peak-held signal, a series circuit of a diode and resistor, which produces a threshold level signal, connected between the first clamp circuit and the output of the peak-held circuit, a comparator circuit supplied at one input with the lower of the threshold level signal and the peak-held signal and supplied at another input with the output from the first clamp circuit for comparing the signals supplied thereto and for producing an output signal corresponding to the higher one of the compared signals, and an average picture level detecting circuit including a variable impedance element connected to the resistor for increasing the threshold level signal in response to increases in the average picture level of the input video signal.

A color television receiver includes an automatic phase control circuit (which will be hereinafter referred to simply as an APC circuit) with a voltage controlled oscillator for controlling the phase of a reference carrier supplied to a color demodulator so that the phase and frequency of the reference carrier are locked to those of a color burst signal. In addition to the APC circuit, an auxiliary frequency control loop drives the frequency of the voltage controlled oscillator until its frequency falls within the lock-in range of the APC loop. The auxiliary frequency control loop includes a counter circuit for counting cycles of the output signal of the voltage controlled oscillator during a reference time interval and a decoding circuit for decoding the output of the counter circuit to produce an auxiliary control signal for frequency control of the voltage controlled oscillator.

Color television receiver AFPC circuit

A clamping circuit for color television signals includes a demodulator for demodulating the chrominance component of the color television signals to produce first and second color difference signals, and first and second adders for adding adjustable first and second control signals to the first and second color difference signals so as to produce modified first and second color difference signals. A matrix circuit is responsive to the outputs from the first and second adders to produce a third color difference signal. A reference signal, which represents a predetermined level of a color television signal, such as the pedestal level, is added to each of the color difference signals; and a first comparator compares the first color difference signal, with the reference signal added thereto, to the third color difference signal, with the reference signal added thereto, and a second comparator compares the second color difference signal, with the reference signal added thereto, to the third color difference signal, with the reference signal added thereto. At the times of occurrence of the pedestal level of the color television signal, the outputs from the first and second comparators are sampled, respectively, to produce the first and second control signals which are fed back and added to the first and second color difference signals. In one embodiment, the reference signal is a d.c. level proportional to the pedestal level of the color television signal. In another embodiment, the reference signal is the luminance component of the color television signal clamped to the pedestal level. This clamped luminance signal is produced by another clamp circuit.

Growing community of inventors

Kanagawa, Japan

Atsushi Matsuzaki