Portable internet access device back page cache
First Claim
1. A host computer which receives information from an outside source, contains a browser with a window which renders and freezes the information onto a virtual display in its memory, wherein a software program reduces the color depth of the virtual display, compresses the virtual display and sends it to a remote device capable of receiving, decompressing, storing into memory and displaying it to a user on a display screen, wherein if the user clicks on the display screen or enters text on the remote device, the display is unfrozen at the browser and the virtual display sent again to the remote device only if the information has changed.
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Accused Products
Abstract
The present invention aims to provide a system that allows multiple users operating a PDA (Personal Digital Assistant), receiving information from a server via a cellular phone, to access the Internet or the World Wide Web (WWW), view and interact with these images remotely on a display screen. The invention relates to the priority in which packets or blocks of information are transferred to and displayed on the screen of the PDA device. The invention further relates to various methods to reduce the amount of data sent to the PDA for back pages or previously viewed web pages, stored in the cache memory of the PDA and also mirrored on the server'"'"'s memory. Various algorithms may be used by the server to determine what information is to be removed from the PDA'"'"'s cache memory, as it approaches its full capacity.
212 Citations
5 Claims
- 1. A host computer which receives information from an outside source, contains a browser with a window which renders and freezes the information onto a virtual display in its memory, wherein a software program reduces the color depth of the virtual display, compresses the virtual display and sends it to a remote device capable of receiving, decompressing, storing into memory and displaying it to a user on a display screen, wherein if the user clicks on the display screen or enters text on the remote device, the display is unfrozen at the browser and the virtual display sent again to the remote device only if the information has changed.
Specification