Radio paging receiver operable on a word scrolling basis

[54] RADIO PAGING RECEIVER OPERABLE ON A WORD SCROLLING BASIS

[75] Inventor: Kazuyuki Tsunoda, Tokyo, Japan

[73] Assignee: NEC Corporation, Tokyo, Japan

[21] Appl. No.: 838,205

[22] Filed: Mar. 10,1986

Related U.S. Application Data

[63] Continuation of Ser. No. 484,037, Apr. 11, 1983, abandoned.

[30] Foreign Application Priority Data

Apr. 13, 1982 [JP] Japan 57-62022

[51] Int. CI." G08B 1/00

[52] U.S. CI. 340/825.44; 340/311.1;

340/792

[58] Field of Search 340/311.1, 825.44,

825.45-825.48,

340/792, 724, 726, 789; 434/114, 116; 179/2

EC

[56] References Cited

U.S. PATENT DOCUMENTS

3,938,139 2/1976 Day 340/789 X

3,976,995 8/1976 Sebestyen 340/792 X

4,359,730 11/1982 Kunikane et al 340/792

4,373,192 2/1983 Yanagiuchi et al 340/792 X

4,403,212 9/1983 Masaki 340/311.1

4,437,095 3/1985 Akahori et al 340/825.44

4,504,825 3/1985 Bergermann et al 340/792 X

Primary Examiner—Ulysses Weldon

Attorney, Agent, or Firm—Sughrue, Mion, Zinn,

Macpeak and Seas

[57] ABSTRACT

A radio paging receiver comprises a linear array of display elements, a memory having a plurality of storage locations for storing a received message code therein, and a microprocessor-based decoder. The microprocessor-based decoder is responsive to a received preamble code for detecting a match between an address code and a user's own code to store a message codeword into the memory in response to the detection of the match. A first sequence of characters is read from predetermined storage locations of the memory and fed to the display elements. In succession, a blank which immediately follows the first sequence is detected to read a second sequence of characters from the positions immediately following the detected blank and displayed by clearing the characters of the first sequence.

2 Claims, 19 Drawing Figures