Deutsche Thomson-brandt Gmbh

Other

Thomson Licensing

Thomson Licensing S.a.

Rainer Schweer

Albrecht Rothermel

Sébastien Weitbruch

Carlos Correa

Gunter Gleim

Sylvain Thiebaud

Cédric Thebault

Friedrich Heizmann

Gangolf Hirtz

Sandor Gyarmati

David Gillies

John Stolte

Thomas Hollmann

Jaques Chauvin

Xavier Lebegue

Phillppe Blaud

A method and an apparatus capable of increasing the video depths depending on the video content of each line in order to provide a maximum of color gradation for each given scene shall be proposed. For this purpose there is disclosed an apparatus for driving a display device including input means for receiving a digital value as video level for each pixel or cell of a line of the display device, reference signaling means for providing at least one reference driving signal and driving means for generating a driving signal on the basis of the digital value and the at least one reference driving signal. The apparatus further includes adjusting means for adjusting the at least one reference driving signal in dependence of the digital values of at least a part of the line.

Method and apparatus for driving a display device with variable reference driving signals

The EMI spectrum of a display device is to comply with respective norms. Therefore, the clock for loading data into data drivers of a display panel is designed to be variable. Consequently, the electromagnetic radiation produced by the loading clock is broadened thereby reducing the peak amplitude. Thus, the limitations of radiation norms can be complied with.

Method and device for driving a display device with line-wise dynamic addressing

The invention relates to a method for displaying screen elements on a reproduction screen. A predetermined number of pixels (Pa . . . Pej) of a reproduction line (L . . . Lm) are combined to form a cell (C . . . Cmn). A reproduction line (L . . . Lm) is formed from a fixedly predetermined number of cells (C . . . Cmn).

Screen display system

Method and device for arranging digitized image signals or data in orthogonal rows and columns

A cache enabling architecture in which an optical storage reading and/or writing device, a caching processor and a mass writing and reading device are each connected to a data bus. The optical storage reading and/or writing device exchanges information directly with the caching processor over the data bus. The caching uses the mass writing and reading device as cache memory.

Cache enabling architecture

Circuit for transmitting digital signals

When processing a digital video signal, the problem often arises of converting the signal from a first sampling raster which is asynchronous with respect to the line interval to a second sampling raster which synchronous with the line interval. Interpolation filters are used for this purpose. The present invention provide a simple method for the conversion which does not require intermediate D/A or A/D conversion. For each line of the input signal, the phase of samples of the first sampling raster relative to the line synchronization pulse and the total number of the samples for this line are determined and are used to control of the interpolation filter.

Method and apparatus for converting the sampling rates of a digital

A film mode detection method and corresponding relatively non complex hardware implementation compares the amplitudes of pixels of corresponding image areas of three successive field to determine if the pixel amplitudes are monotonically increasing or decreasing. Depending on the comparison a positive or negative polarity indication is generated and these indications are combined within each field to generate a polarity indication representing each respective field. The field sequence of such field polarity indications are thereafter compared with a predetermined pattern to determine whether the video signal is from a film or video-mode source.

Method and device for film-mode detection

A grid correction circuit for a television receiver includes a first memory for storing correction values for correcting the deflection current of the television receiver. A second memory perodically provides a test signal to a correction coil to correct the deflection of the television receiver. A switch periodically selectively connects the first memory to the correction coil and a correction current flows through the correction coil. The switch also periodically connects the second memory to the correction coil and a test current flows through the correction coil. An impedance is responsive to the correction coil and produces a correction voltage and a test voltage in response to the correction current and the test current respectively. A comparator receives the test voltage and compares the test voltage to a reference voltage and provides an output voltage having a first level when the test voltage is below the reference voltage and a second level when the test voltage is above the reference voltage. A processor receives the output voltage and changes the correction voltage to incrementally reciprocate above and below the reference voltage by a preslected increment to maintain the correction voltage at substantially the same level as the reference voltage over a long time period.

Grid correction circuit for TV sets

Growing community of inventors

Niedereschach, Germany

Rainer Schweer