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| Number | Title | Issue Date |
| 6573944 | Horizontal synchronization for digital television receiver A horizontal synchronizing system, comprising: a source of a horizontal synchronizing signal; a source of first and second higher frequency horizontal drive signals; a phase detector for generating a first control voltage responsive to the horizontal sync... | 06/03/2003 |
| 6486926 | Adaptable raster distortion correction system for multiple horizontal scanning frequencies A memory and a switchable digital filter supply different numbers of digital distortion correction values. The supplied distortion correction values are converted to an analog distortion correction signal. A passive, analog low pass filter for the analog ... | 11/26/2002 |
| 6483533 | Projection televisions with three dimensional holographic screens A projection television is provided comprising at least three image projectors for projecting respective images of different colors onto a holographic projection screen. One of the projectors has a first, shortest optical path disposed in a substantially ... | 11/19/2002 |
| 6437914 | Projection televisions with holographic screens having center to edge variations An East-West switching transistor is coupled between a flyback transformer primary winding and a horizontal deflection output transistor circuit to control retrace energy to obtain an East-West modulation of the deflection current amplitude as required fo... | 08/20/2002 |
| 6420918 | Phase control for oscillators A phase locked loop, comprising: a controllable oscillator requiring a control signal having a given bias voltage for generating a clock signal; an integrator for developing the control signal; a source of an external synchronizing signal; first and secon... | 07/16/2002 |
| 6400417 | Projection television with three-dimensional holographic screen and centered blue CRT for balanced CRT drive In a method for controlling color temperature a projection television having green, blue and red image projectors and a projection screen, holographically improving color shift performance of the screen results in an undesirable controlled input angle cha... | 06/04/2002 |
| 6366706 | Method and apparatus for automatic aspect format detection in digital video pictures Analyzing steps are used for automatic aspect format detection in digital video pictures. A black bars analyzing step is performed wherein for each possible aspect format (14:9, 16:9, 2:1) a top and/or bottom area is defined and checked for whether a blac... | 04/02/2002 |
| 6292235 | Distortion correction system with switchable digital filter A switchable digital filter interpolates distortion correction values. The distortion correction values together with interpolated distortion correction values are supplied as an output. Proper operation of the digital filter is disturbed by transient sig... | 09/18/2001 |
| 6173115 | Record during pause and playback with rewritable disk medium A method for recording a program during pausing and playing back the program utilizing a disk medium, comprising the steps of: upon initiating a pause, recording the program onto a disk medium as a first pattern of recorded segments alternating with a sec... | 01/09/2001 |
| 6151163 | Holographic projection screen having a rear-facing fresnel lens A screen for a projection-type video display apparatus. A linear-type Fresnel lens has a lens pattern on a first side for receiving light energy from a light source. A second side of the Fresnel lens is opposite the first side. The light energy exits the ... | 11/21/2000 |
| 6122433 | HDTV trick play stream derivation for VCR A consumer digital video cassette recorder (210) may record an advanced television signal having an MPEG like signal format. The predictive nature of the MPEG like signal format requires that additional I frame data be generated and recorded together with... | 09/19/2000 |
| 6111616 | Method for correcting the convergence in a projection television receiver A set of coarse or initial convergence correction values for a model line of projection television receivers is defined in digital form prior to production using a fine grid or grating pattern. The set of coarse convergence correction values is digitally ... | 08/29/2000 |
| 6108054 | Method and apparatus for obtaining correction values for video lines of a video frame A method and apparatus for obtaining correction values for convergence setting in video projection devices includes calculating the correction values for the individual video lines at least in part by interpolation between correction interpolation point v... | 08/22/2000 |
| 6088242 | Switched-mode power supply having a reduced harmonic load on the mains A switched mode power supplier having an improved power factor, that is to say a reduced harmonic load on the mains comprising a switch mode power supply with a reduced harmonic load on mains, comprising a mains rectifier being coupled to a charge capacit... | 07/11/2000 |
| 6078351 | Projection televisions with three dimensional holographic screens A projection television comprises a projection screen formed by a three dimensional hologram disposed on a film substrate. A projection tube has an optical path in a substantially orthogonal orientation with the screen and two other projection tubes have ... | 06/20/2000 |
| 6072544 | Method for obtaining signals in electronic devices by means of interpolation between interpolation point values A method is proposed for obtaining signals in electronic devices by means of interpolation between interpolation point values (W0 to W12), the interpolation point values (W0 to W12) being distributed linearly over a region. A number of interpolation value... | 06/06/2000 |
| 6064713 | Shift register using "MIS" transistors of like polarity A shift register having several cascaded stages, each stage containing an output at a first node connected to a next stage, a first input connected to an output of a preceding stage, a second input connected to an output of the next stage and a first term... | 05/16/2000 |
| 6064794 | Trick-play control for pre-encoded video An inventive method provides various reproduction modes by controlled selection of replay locations. Selection within a video stream or between separate video streams derived for selected trick-play speeds may be facilitated. The method allows selections ... | 05/16/2000 |
| 6058240 | HDTV trick play stream derivation for VCR A consumer digital video cassette recorder (210) may record an advanced television signal (09) having an MPEG like signal format. The predictive nature of the MPEG like signal format requires that additional I frame data be generated and recorded together... | 05/02/2000 |
| 5625406 | Unified program guide interface Analog and digital video signals are each representative of a picture and each may carry program guide information. A demultiplexer has the digital video signal as an input and the program guide information as an output. A demodulator has at least a lumin... | 04/29/1997 |
| 5615092 | Switching power supply regulator with an inductive pulse circuit A horizontal deflection circuit couples flyback pulses from a first transformer winding to a second transformer winding. The second winding is coupled to a source of unregulated DC voltage. A switch has input, output and control terminals. The output term... | 03/25/1997 |
| 5608460 | Synchronizing signal separating circuit with controlled flywheel stage A synchronizing signal separating circuit for a television receiver, comprising: a source of a video signal having a line synchronizing signal component; a line synchronizing signal component separator having an amplitude selective stage and having a flyw... | 03/04/1997 |
| 5602447 | Cathode ray tube focus supply A focus supply circuit, comprising: a power source for generating a high voltage for energizing a cathode ray tube, including a transformer having a high voltage winding with at least one intermediate output tap; and, a focus screen assembly, having a res... | 02/11/1997 |
| 5576769 | Automatic synchronization switch for side-by-side displays A video display system comprises a video display for simultaneously displaying pictures representative of first and second video signals, having first and second synchronizing signals respectively. A switch selectably couples the video display with one of... | 11/19/1996 |
| 5576770 | Adaptive synchronizing signal separator A digital clamp combines a digitized luminance signal with a DC offset to clamp the back porch portions of the luminance signal to a predetermined IRE level. The clamp generates a reference signal having successive values indicative of successive IRE leve... | 11/19/1996 |
| 5574508 | Vertical panning for interlaced video A vertical panning system comprises: a source of respective signals having a vertical synchronizing frequency, a horizontal synchronizing frequency and a multiple of the horizontal synchronizing frequency; a video display having an interlaced field mode o... | 11/12/1996 |
| 5534810 | Power stage bias circuit with improved efficiency and stability A driver circuit especially for driving scan velocity modulation (SVM) coils or similar loads is characterized by low quiescent current loading and high peak output. The driver is coupled to an input signal varying between a quiescent signal level and a p... | 07/09/1996 |
| 5532558 | Protection circuit for dynamic focus amplifier An active pull up arrangement coupled to a high voltage source generates an operating voltage. An amplifier for a dynamic focus modulating signal is energized by the operating voltage and has a plurality of transistors, for example low voltage transistors... | 07/02/1996 |
| 5528211 | Magnetic focusing device A focusing device for a cathode ray tube comprises a plurality of substantially cylindrical permanent magnets, each having a longitudinal axis. A holder positions the magnets in an annular array at substantially equally spaced intervals in which the axes ... | 06/18/1996 |
| 5521646 | Geometry and convergence correction for projection television apparatus A projection television apparatus has three monochromatic picture tubes disposed in a planar orientation defining a central picture tube and two outer picture tubes. Each of the picture tubes includes a deflection unit responsive to deflection currents an... | 05/28/1996 |
| 5508593 | Differential error convergence correction A convergence correction circuit, for a cathode ray tube projecting images having keystone, differential sine and differential left edge curl distortions, comprises generators for horizontal rate sine, horizontal rate sawtooth and horizontal rate pulse wa... | 04/16/1996 |
| 5502408 | Circuit for decoding 2T encoded binary signals A decoding circuit for 2T encoded binary signals, comprises: a data input terminal; a first D-type flip flop having an input coupled to the input terminal; a first exclusive OR gate having inputs coupled to the input terminal and an output of the first D-... | 03/26/1996 |
| 5486871 | Automatic letterbox detection A video control system, comprises a deflection system having a dimensionally adjustable raster, a circuit for detecting a letterbox video signal source and a circuit for dimensionally controlling the raster of the deflection system responsive to the detec... | 01/23/1996 |
| 5486741 | Waveform correction circuit for dynamic focus amplifier A dynamic focus amplifier, comprising: a first circuit responsive to a vertical rate sawtooth waveform for generating at the vertical rate a modulating waveform having a desired component of a given shape during trace intervals and an undesired time compr... | 01/23/1996 |
| 5467144 | Horizontal panning for PIP display in wide screen television A video display for a television apparatus has a wide format display ratio and is synchronized with a first video signal representative of first picture. A PIP processor is responsive to a second video signal representative of a second picture to define a... | 11/14/1995 |
| 5442406 | Wide screen television A video display has a first format display ratio. A mapping circuit maps an adjustable picture display are on the video display. A signal processor generates first and second video signals from input video signals having one of different format display ra... | 08/15/1995 |
| 5434625 | Formatting television pictures for side by side display A video display system comprising: a first source of a first video signal representative of a first picture having a first display format ratio; a first memory having write and read ports, the first video signal being written into the first memory at a sl... | 07/18/1995 |
| 5432560 | Picture overlay system for television A picture overlay system assures proper size and placement of picture overlays in simultaneous picture displays. The system comprises a video memory and a control circuit for writing and reading information from a video signal into and out of the video me... | 07/11/1995 |
| 5430494 | Independent horizontal panning for side-by-side pictures A video display system comprises: a video display; first and second signal processors for cropping first and second video signals representative of first and second pictures; a circuit for generating a side-by-side display format of the pictures on the vi... | 07/04/1995 |
| 5430358 | High voltage vertical dynamic focus amplifier A current transformer has a primary side winding coupled to a source of horizontal rate sawtooth yoke current and a secondary side in which a horizontal rate AC signal is developed. A rectifier has at least one capacitor, the rectifier receiving the horiz... | 07/04/1995 |
