METHOD AND APPARATUS FOR DISPLAYING A PREDETERMINED IMAGE ON A DISPLAY PANEL OF AN ELECTRONIC DEVICE WHEN THE ELECTRONIC DEVICE IS OPERATING IN A REDUCED POWER MODE OF OPERATION

摘要

A display controller for use within an electronic device includes a dedicated memory and a low power display processor for displaying information when the electronic device is operating in a reduced power mode of operation (e.g., sleep mode). The memory stores display data for a predetermined image and the display processor supplies the display data to a display panel of the electronic device when the electronic device is operating in the reduced power mode. The display controller may also include a processor interface for receiving control information from the electronic device's device processor to enable the display processor to determine that the electronic device is operating in reduced power mode. The display processor may be configured to scale the stored display data when, due to memory size constraints, the memory stores the display data at a resolution that is different from (e.g., less than) the display panel resolution.

主权项

1. A display controller for use within an electronic device, the display controller being operable to control operation of a display panel of the electronic device when the electronic device is operating in a full power mode of operation or a reduced power mode of operation, the display controller comprising:
a processor interface operable to receive control information from a device processor of the electronic device when the electronic device is operating in the reduced power mode of operation, the control information excluding display data; a memory operable to store display data for a predetermined image; and a display processor operably coupled to the processor interface and the memory, the display processor being operable, responsive to the control information, to provide the display data for the predetermined image to the display panel so as to enable the display panel to display the predetermined image.