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US 5,329,290 AGranted
Monitor control circuit
AssigneeSPEA Software AG
InventorsStefan Schwarz, Ian Cartwright
Life of this patent
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AssigneeSPEA Software AG
InventorsStefan Schwarz, Ian Cartwright
Estimating the term…
A monitor control circuit for driving a monitor, operating at a second pixel frequency, on the basis of a digital image signal having a first pixel frequency. The circuit has a first storage device, constructed as a first in-first out storage device, into which the image signal, having a frequency dependant on the first pixel frequency, can be read by means of a first control device. The circuit further has a video storage device in effective connection with the output of the first storage device. To ensure constant updating of the image signal to be displayed, a second storage device, connected to the video storage device and the first storage device, is adapted for reading data words from the first storage device and writing them into the video storage device in such a manner that the reading of the data words from the first storage device is interrupted when data words are being read from the video storage device. As a result, the number of data words stored in the first storage device which can be re-stored in the video storage device can vary.
A monitor control circuit for driving a monitor, which operates at a second pixel frequency, on the basis of a digital image signal with a first pixel frequency, comprising:
A method of driving a monitor, which operates at a second pixel frequency, the monitor being adapted to produce a display by reading an output-side digital image signal with the second pixel frequency from a video storage device (4), on the basis of all the data words of an input-side digital image signal having a first pixel frequency, comprising:
A monitor control circuit for driving a monitor, which operates at a second pixel frequency, said monitor being adapted to produce a display by reading an output-side digital image signal with the second pixel frequency from a video storage device (4), on the basis of all the data words of a digital image signal having a first pixel frequency, comprising:
Dependencies are inferred from the claim text.