Patent ID: 7176847

Claim:
Apparatus for enabling information in a first graphics display control signal that a first high-power graphics display controller derives in a first format and a second graphics display control signal that a second low-power graphics display controller derives in a second format to be coupled to a display screen arranged to operate in response to signals in the first format, the first and second graphics display control signals being respectively associated with first and second microprocessors of first and second electronic devices respectively having relatively large and small display screens, the first display screen being the display screen arranged to operate in response to signals in the first format, the first and second microprocessors being arranged for: respectively deriving (a) information included in the first and second graphics display control signals and (b) first and second multiplexer control signals for controlling coupling of information in the first and second graphics display control signals to the display screen of the first device, the apparatus comprising: a converter arrangement for converting graphics display control signals in one of the formats to graphics display control signals in the other of the formats, a multiplexer, and a controller for the multiplexer, the controller being arranged to be responsive to the first and second multiplexer control signals, the converter arrangement, the multiplexer, and the controller being arranged with each other and arranged to be coupled to (a) the first and second graphics display signals, (b) the first and second multiplexer control signals, and (c) the display screen of the first device for: causing the display screen of the first device to be responsive to signals in the first format to display information in the first and second graphics display control signals at different times without the second graphics display control signal being processed by the first high-power graphics display controller.