Multi-standard display device with scan conversion circuit
First Claim
1. A multi-standard display device for displaying pictures having a television-standard-dependent format, which device comprises a matrix display screen, a video-signal processing circuit for receiving and processing the pictures, said pictures having a format-associated number of lines in a first direction, a sync separator for determining horizontal and vertical synchronizing signals, and a standard-conversion circuit for converting the pictures of the television-standard-dependent format into pictures having a display-screen-associated format, characterized in that the standard-conversion circuit comprises a scan-conversion circuit for converting pictures having lines in the first direction into lines in a second direction perpendicular to the first direction, said second-direction lines being applied to the display screen and being displayed in the second direction under the control of a control circuit.
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Accused Products
Abstract
A multi-standard display device having a liquid crystal display screen has so far only been realized by using all kinds of interpolation techniques. To make the number of rows and columns of the display screen independent of the incoming video signal and yet provide the possibility of displaying the various television standards without any disturbing errors, the incoming video signal is applied to the display screen via a scan-conversion circuit. The scan-conversion circuit reads in the video information in a first direction and subsequently reads it out in a second direction perpendicular to the first direction, for example, with storage in a memory. The video information is subsequently applied in the second direction to the row driver of the display screen, which row driver applies the video information to the display screen per column and under the control of the column driver.
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Citations
8 Claims
- 1. A multi-standard display device for displaying pictures having a television-standard-dependent format, which device comprises a matrix display screen, a video-signal processing circuit for receiving and processing the pictures, said pictures having a format-associated number of lines in a first direction, a sync separator for determining horizontal and vertical synchronizing signals, and a standard-conversion circuit for converting the pictures of the television-standard-dependent format into pictures having a display-screen-associated format, characterized in that the standard-conversion circuit comprises a scan-conversion circuit for converting pictures having lines in the first direction into lines in a second direction perpendicular to the first direction, said second-direction lines being applied to the display screen and being displayed in the second direction under the control of a control circuit.
Specification