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| Number | Title | Issue Date |
| 7312793 | Liquid crystal display controller In a liquid crystal television, a display controller prevents burning of a liquid crystal panel due to irregularity in a synchronization signal. A counter of a liquid crystal display controller detects a period of a horizontal synchronization signal and a vertical s... | 12/25/2007 |
| 7176979 | Synchronization pulse detection circuit A synchronization pulse detector includes an absolute value independent shape detector for processing samples of an input signal having a synchronization pulse and a plurality of non-synchronization pulses to determine whether such samples have a predetermined seque... | 02/13/2007 |
| 7127631 | Single wire serial interface utilizing count of encoded clock pulses with reset A single wire serial interface for power ICs and other devices is provided. To use the interface, a device is configured to include an EN/SET input pin. A counter within the device counts clock pulses sent to the EN/SET input pin. The output of the counter is passed... | 10/24/2006 |
| 7053959 | Digital video encoder A mask circuit masks a digital video signal so that a video signal of an analog video signal is not outputted for a predetermined period after the start of output of a horizontal synchronizing signal of the analog video signal. A period of masking the digital video ... | 05/30/2006 |
| 7050111 | Process and device for synchronizing a reference signal with respect to a video signal A synchronization process may include detecting successive horizontal synchronization pulses of a video signal, and a phase comparison between the successive detected pulses and the successive transitions of the reference signal for controlling the oscillator of the... | 05/23/2006 |
| 7020165 | Apparatus and method for trellis encoding data for transmission in digital data transmission systems A system for bidirectional communication of digital data between a central unit and a remote unit wherein the need for tracking loops in the central unit has been eliminated. The central unit transmitter generates a master carrier and a master clock signal which are... | 03/28/2006 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6909428 | Signal converter device The present invention provides a device for signal transfer, which outputs a treatment signal relating to a vertical-horizontal composite sync signal of a monitor and an integrated signal of the vertical-horizontal composite sync signal. There is a plurality of logi... | 06/21/2005 |
| 6839092 | Feed forward error correction in video decoder In accordance with an embodiment of the present invention a microprocessor in the horizontal phased lock loop reads the horizontal timing with respect to the sync input and provides an increment inch to the horizontal discrete time oscillator to make corr... | 01/04/2005 |
| 6177959 | Circuit and method for generating a clock signal synchronized with time reference signals associated with television signals A clock generation circuit for use in a television system displaying images encoded in television signals and images represented by network application data. The clock generation circuit generates a clock signal synchronized with HSYNC signals of the tele... | 01/23/2001 |
| 6130718 | Method and device for correcting errors in the opening of time windows for recovering data with horizontal synchronization pulses Method and device for correcting errors in synchronization of operations of recovering sequences of ancillary data transmitted over the invisible lines of the VBI of a video signal including a vertical synchronization signal Vsync and a horizontal synchro... | 10/10/2000 |
| 6049358 | Counter control circuit for controlling counter having a pulse period measuring function A counter control circuit of a counter for measuring a pulse period of a video synchronization signal includes a main control unit having a synchronization signal input Sync, and a control signal producing unit including a stop signal generator, a latch s... | 04/11/2000 |
| 6005634 | Method and apparatus for controlling the display of a video image A control circuit (100) which receives horizontal synchronising pulses (265) and generates a horizontal drive output signal (455) for a cathode ray tube (CRT) display. The horizontal control circuit (100) generates two ramp signals. A first ramp signal (4... | 12/21/1999 |
| 5844622 | Digital video horizontal synchronization pulse detector and processor The invention pertains to a digital video horizontal synchronization pulse detector and processor comprising pulse detector for generating a timing pulse in response to each horizontal synchronization pulse. A sync position error device generates a time p... | 12/01/1998 |
| 5502502 | PLL-based method and apparatus for generating video drive signals from various sync formats Various video signals provide horizontal sync pulses for generating a horizontal drive signal only during a horizontal sync portion and part of the vertical sync portion of a video signal. The invention generates a horizontal drive signal in the absence o... | 03/26/1996 |
| 5495294 | Synchronising signal generator A synchronizing signal separator receives synchronizing signals from a remote source. A window generator opens a window for a period and a counter regenerates synchronizing signals detected when the window is open. Detection of an incoming synchronizing s... | 02/27/1996 |
| 5121086 | PLL including static phase error responsive oscillator control A static phase error responsive oscillator control includes a phase detector coupled to a source of horizontal synchronizing pulses, a low pass filter, an error amplifier, a voltage controlled oscillator having a frequency equal to a multiple of the horiz... | 06/09/1992 |
| 4908582 | AFC circuit for producing a ripple-free oscillator control voltage An AFC circuit using counters, flip-flops and logic gates produces a first pulse signal only when the phase of a VCO output signal lags the phase of a reference signal, and produces a second pulse signal only when the phase of the VCO output signal leads ... | 03/13/1990 |
| 4843469 | Rapid signal acquisition and phase averaged horizontal timing from composite sync A circuit for extracting phase averaged horizontal timing with high noise immunity and for rapidly acquiring a video signal from a composite synchronizing signal generates an output signal at the horizontal sync rate, the output signal having leading edge... | 06/27/1989 |
| 4835611 | Timing signal generator for a video signal processor A timing signl generator for use in a multi-processor real-time digital video processing system. Each processor in the multiprocessing system is responsible for processing a selected portion of the video picture frame, as diesignated by the timing signal ... | 05/30/1989 |
| 4833371 | Picture display device with symmetrical deflection A picture display device for displaying a picture by means of a line raster consisting of a plurality of lines which are successively scanned in the opposite direction includes a video signal processing circuit for receiving an incoming video signal compr... | 05/23/1989 |
| 4812783 | Phase locked loop circuit with quickly recoverable stability A PLL circuit for a phase comparator, a low-pass filter (LPF), a voltage-controlled oscillator (VCO) and a frequency divider. A first control circuit is responsive to a discontinuous phase change of a reference signal of the PLL circuit for inhibiting the... | 03/14/1989 |
| 4737849 | Process and a periodic instant regeneration circuit A process for regenerating a periodic signal creates two signals. The first ignal provides for the detection of a periodic signal for a short time preceding the theoretical timing position of the periodic signal. The second signal is transmitted a very sho... | 04/12/1988 |
| 4689582 | Phase-lock-loop circuit for a television apparatus A digital phase-lock-loop circuit includes a generator that produces a horizontal rate output signal at a controlled frequency and a phase detector responsive to the output signal and to an incoming synchronizing signal. The phase detector is coupled to t... | 08/25/1987 |
| 4654604 | Frequency controlled oscillator utilizing an U/D counter in the feedback A frequency controlled oscillator arranged to be fabricated in integrated circuit form including a primary frequency controlled oscillator and a secondary frequency controlled oscillator with a counter arranged to periodically count pulses of the oscillat... | 03/31/1987 |
| 4598234 | Digital image correction circuit for cathode ray tube displays A digital electron optics correction circuit for correcting the focus and astigmatism in a displayed image on a CRT is disclosed. The circuit includes a clock generator for generating a selected number of pulses between each horizontal blanking synchroniz... | 07/01/1986 |
| 4578705 | Digital circuit for synchronizing a pulse train A digital synchronization operation circuit synchronizes a pulse train with horizontal synchronizing pulses contained in a received standard television signal which, after being demodulated in the television receiver, is present as the composite color sig... | 03/25/1986 |
| 4520394 | Horizontal scanning frequency multiplying circuit A horizontal scanning frequency multiplying circuit comprises a flip-flop supplied with an input horizontal synchronizing signal having a horizontal scanning frequency fH of a television signal, a phase-locked-loop (PLL) for producing a signal ... | 05/28/1985 |
| 4476490 | Horizontal scanning frequency multiplying circuit A horizontal scanning frequency multiplying circuit comprises a flip-flop supplied with a horizontal synchronizing signal having a horizontal scanning frequency fH, which is set by this horizontal synchronizing signal, a phase-locked-loop, and ... | 10/09/1984 |
| 4417218 | Linearizing circuit for a high frequency voltage controlled oscillator A circuit for linearizing the oscillator sweep output frequency signal of a oltage controlled oscillator is disclosed. The voltage controlled oscillator is driven by the output of an op amp, which amplifies and filters the output of a D/A converter. The D/... | 11/22/1983 |
| 4335403 | Horizontal countdown system for television receivers A horizontal countdown system is described for developing horizontal scan drive pulses in a color television receiver. The system includes a counter for counting the cycles of a color oscillator signal, various decoders for sensing the state of the counte... | 06/15/1982 |
