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First Claim
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1. In a system for transmitting messages from a common source to a plurality of movable destinations by radio transmission, a device at at least one of the destinations, comprising:
- (a) receiver means for receiving a radio message from the common source, said message comprising a sequence of coded signals;
(b) fixed memory means for storing fixed graphical images, which include character font images, at addressable locations;
(c) read-write memory means for storing graphical images that can be changed, which include character font images, at addressable locations;
(d) processor means, coupled to said receiver means, for processing the coded signals received from said receiver means, said processor means including;
(1) means for converting each coded signal into an address code having N bits of 2N possible address codes;
(2) first means for addressing said fixed memory means with a first set of the 2N possible address codes to retrieve fixed graphical images therefrom;
(3) second means for addressing said read-write memory means with a second set of the 2N possible address codes to retrieve the graphical images therefrom;
(4) means responsive to a command signal from the common source for altering the graphical images stored in said read-write memory means, whereby the total number of graphical images retrievable from said fixed memory means and said read-write memory means by the 2N possible address codes exceeds 2N ; and
(e) display means coupled to said processing means for displaying the graphical images retrieved from said fixed memory means and said read-write memory means by said first and second addressing means.
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Abstract
A portable radio pager receives a radio message encoded with graphical information, e.g. Oriental language characters, to be displayed. The radio message is converted into an address code of N-bits. Predetermined and programmable language characters are stored respectively in on-board, read-only and random access memories at addressable locations. More than 2N addressable locations are addressed to obtain the language characters to be displayed on the pager.
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Citations
23 Claims
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1. In a system for transmitting messages from a common source to a plurality of movable destinations by radio transmission, a device at at least one of the destinations, comprising:
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(a) receiver means for receiving a radio message from the common source, said message comprising a sequence of coded signals; (b) fixed memory means for storing fixed graphical images, which include character font images, at addressable locations; (c) read-write memory means for storing graphical images that can be changed, which include character font images, at addressable locations; (d) processor means, coupled to said receiver means, for processing the coded signals received from said receiver means, said processor means including; (1) means for converting each coded signal into an address code having N bits of 2N possible address codes; (2) first means for addressing said fixed memory means with a first set of the 2N possible address codes to retrieve fixed graphical images therefrom; (3) second means for addressing said read-write memory means with a second set of the 2N possible address codes to retrieve the graphical images therefrom; (4) means responsive to a command signal from the common source for altering the graphical images stored in said read-write memory means, whereby the total number of graphical images retrievable from said fixed memory means and said read-write memory means by the 2N possible address codes exceeds 2N ; and (e) display means coupled to said processing means for displaying the graphical images retrieved from said fixed memory means and said read-write memory means by said first and second addressing means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. In a system for transmitting messages from a common source to a plurality of movable destinations by radio transmission, a device at at least one of the destinations, comprising:
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(a) receiver means for receiving radio messages from the common source containing at least one of (1) graphical information, which includes character font information, to be displayed, and (2) command data, which includes an identifying code; (b) display means for displaying graphical images, which include character font images, corresponding to graphical information received by said receiver means from the common source; (c) non-volatile memory means for changeably storing the identifying code identifying said device, in accordance with said command data received by said receiver means; and (d) processor means coupled to said receiver means, for processing radio messages received from said receiver means when the received identifying code matches the stored identifying code, said processor means including; (1) means for converting encoded graphical information into graphical images for display by said display means, and (2) means responsive to command data received by said receiver means from the common source for altering the identifying code identifying said device and stored in said non-volatile memory means.
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Specification