Genesis Microchip Corporation

Tamiras Per Pte. Ltd., LLC

Other

Genesis Microchip (delaware) Inc.

John Lattanzi

Ali Noorbakhsh

David C Keene

Ram Chilukuri

Alexander Julian Eglit

Tzoyao Chan

Detecting when the on-board power supply is powered on or off by an auto activity detection circuit by determining if the reference clock signal (T) is toggling, and, if the reference clock signal is toggling, then charging a capacitor to a high voltage in the auto activity detection circuit based on the toggling reference clock signal, and outputting an on-board power supply activity signal based upon the high voltage by the auto activity detection circuit indicative of whether or not the on-board power supply is active.

Automatic activity detection in a display controller

Detecting when the on-board power supply is powered on or off by an auto activity detection circuit by determining if the reference clock signal (T) is toggling and if the reference clock signal is toggling, then charging a capacitor to a high voltage in the auto activity detection circuit based on the toggling reference clock signal, and outputting an on-board power supply activity signal based upon the high voltage by the auto activity detection circuit indicative of whether or not the on-board power supply is active.

A display controller includes a processor arranged to process executable instructions and associated data, a single memory device for storing the executable instructions and associated data and EDID corresponding to the display device that is always available for access by the data ports and/or the processor regardless of a power state of the display controller, a data buffer for storing EDID read from the memory device, and an arbitration circuit for arbitrating memory device access requests between the processor and a requesting data port wherein when the data buffer is not almost empty, then the arbitration circuit grants the processor access to the memory wherein when the data buffer is almost empty, then the arbitration circuit grants only the requesting data port access to them memory so as to replenish the data buffer with read EDID.

Arbitration for acquisition of extended display identification data (EDID)

A display controller coupled to a display device by way of a display interface and to a host device by way of a data port that includes a processor arranged to process executable instructions and associated data, a single memory device for storing the executable instructions and associated data and EDID corresponding to the display device, and a bridge portion coupling the single memory device to the host device by way of the data port, wherein the bridge portion is always in a powered on state thereby providing access to the single memory device by the host device even when the display controller is in a powered off state such as during a boot up process when the display controller is in the powered off state.

Method for acquiring extended display identification data (EDID) in a powered down EDID compliant display controller

Virtual extended display information data (EDID) in a flat panel controller

In a VESA standard compliant display controller having a processor arranged to process executable instructions and associated data, a memory device arranged to store EDID and the executable instructions and associated data, a number of data ports coupled to the memory device by way of an I2C data bus each coupled to a host device, a method of transferring EDID from the memory device over the I2C data bus to a requesting one of the data ports while servicing a processor memory access request without clock stretching.

Acquisition of extended display identification data (EDID) using inter-IC (I2C) protocol

Managing power in a display controller having an on-board power supply coupled to a host device having an off-board power supply by way of a connector is described. If the on-board power supply is active, then power is supplied to the display controller by the off-board power supply by way of the connector and a low frequency clock arranged to provide a low frequency clock signal is turned on. Alternatively, when it is determined that the on-board power supply is active, then power is supplied to the display controller by the on-board power supply only, the low frequency clock is turned off and a high frequency clock arranged to provide a high frequency clock signal is turned on.

Power management in a display controller

A video controller having a processor for processing executable instructions and associated data and a number of data ports, a method of acquiring extended display identification data (EDID) by a requesting one of the data ports is described. When on-board power supply is activated, an off-board power supply is deactivated and then the now active on-board power supply provides power to a memory device used to store the EDID and the executable instructions and associated data and to an on-board clock circuit capable of providing a high frequency clock signal. The on-board clock circuit, in turn, provides the high frequency clock signal from the on-board clock circuit to the memory device and if a memory read operation had been in progress when the on-board power supply was activated, then the memory read operation is completed.

Acquisition of extended display identification data (EDID) in a display controller in a power up mode from a power down mode

A monolithic integrated circuit for use in a digital display unit. The circuit may include an analog-to-digital converter (ADC), a scaler and a clock recovery circuit. The present invention enables the integration of at least these components into a single monolithic integrated circuit while maintaining reasonable display quality. Specifically, the monolithic integrated circuit is designed for substantial immunity from noise, which may otherwise result from integration.

Monolithic integrated circuit implemented in a digital display unit for generating digital data elements from an analog display signal received at high frequencies

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Palo Alto, CA, United States of America

John Lattanzi