Portable radio telephone set

Abstract: A portable radio telephone set comprises a telephone number generating apparatus and a telephone number transmitting apparatus which are preferably contained in a pencil shaped body (1). The telephone number generating means generates a telephone number signal, for instance, by sensing the motion of a ball (11) provided on a lower end of the body. The ball is moved to draw a telephone number on a surface of an article. The telephone number signal is modulated in the telephone number transmitting apparatus to be transmitted to air by an antenna (6) which is provided on an upper end of the body.

Description: FIELD OF THE INVENTION This invention relates to a portable radio telephone set,and more particularly to an improvement of a dial unit in a portable radio telephone set. BACKGROUND OF THE INVENTION In general, a portable radio telephone set comprises a dial operation unit having a plurality of push buttons for generating a calling signal and a telephone number signal of a called party. In this portable radio telephone set, the calling party presses the selected push buttons in turn to generate a telephone number signal which is supplied to a control unit of the telephone set, so that the telephone set of the calling party is connected through a communication channel to a telephone set of the called party. Otherwise, a portable radio telephone set having a voice recognition apparatus has been proposed. In this portable radio telephone set, a calling party speaks the telephone number of the called party by facing the telephone set, so that the voice recognition apparatus recognizes the voice of the calling party to generate a telephone number signal of the called party. Consequently, the telephone set of the calling party is connected through a communication channel to a telephone set of a called party. However, the former portable radio telephone set has a disadvantage in that a limitation occurs in making the size of the telephone set small, because the plural push buttons must be provided on a main body of the telephone set to generate a telephone number signal. In addition, the latter portable radio telephone set has a disadvantage in that it is difficult to dial a telephone number of the called party in a confidential manner, because the telephone number has to be spoken at a predetermined voice level by the calling party. In EP-A-317 496 a telephone system is provided with an address book having a number of bar codes each corresponding to a short code and a telephone transmitter/receiver housing having a bar-code reading wand. The short codes each correspond to a location in a telephone memory. The telephone is programmed by storing a telephone number corresponding to each of the short codes and labelling each bar code in the address book with the name of the subscriber. To make a call the calling party locates the name of the subscriber he wishes to call (the called party) in the address book and scans the corresponding bar code. The short code represented by the bar code is then used to address the memory location having the called party's telephone number stored therein. The telephone number is read from the memory and converted into dialling pulses which are sent down the telephone line to establish communication with the called party. EP-A-0 070 697 discloses a telephone dialling system in which a hand-held wand reads telephone numbers represented in bar-code form. The invention in its various aspects is defined in the independent claims below to which reference should now be made. Advantageous features of the invention are set forth in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS This invention will be explained in more detail in conjunction with the appended drawings, wherein: Fig. 1 is a perspective view showing a portable radio telephone set in a preferred embodiment according to the invention; Fig. 2 is an enlarged perspective view showing an information input unit in the portable radio telephone set in the preferred embodiment; Fig. 3 is a block diagram showing the portable radio telephone set in the preferred embodiment; Figs. 4A and 4B are explanatory diagrams showing output signals of encoders in the portable radio telephone set in the preferred embodiment, and a pattern defined by the output signals, respectively; and Figs. 5A to 5C are a flow chart explaining operation of the portable radio telephone set in the preferred embodiment. DESCRIPTION OF THE PREFERRED EMBODIMENT Fig. 1 shows a portable radio telephone set in a preferred embodiment according to the invention. The portable radio telephone set comprises a main body 1 of a pencil shape which is provided at a first end with an information input unit 2 and at a second end with an antenna 6, an LCD display 3 at the approximately central portion of the main body 1, a microphone 4 in the vicinity of the first end, and a receiver 5 in the vicinity of the second end. This portable radio telephone set is held in operation by the hand of the calling party or the called party. Fig. 2 shows the information input unit 2 which comprises a ball 11 rotating in an arbitrary direction, and X- and Y- direction rotary encoders 12 and 13 having X- and Y- axes intersecting orthogonal to each other at an origin 0. The encoders 12 and 13 comprise rollers 14 and 15 which are in contact to be rotated with the ball 11, gears 18 and 19 connected to the rollers 14 and 15 by rotary shafts 16 and 17, and photo-interruptors 24 and 25 for generating signals indicative of moving distances of the ball 11 in the X-and Y- directions by cooperation with the gears 18 and 19, respectively. The photo-interruptors 24 and 25 comprise LEDs 20 and 21 for emitting light, and phototransistors 22 and 23 for receiving the light passing through portions having no teeth on the outer peripheries of the gears 18 and 19 to generate the moving distance signals, respectively. Fig. 3 shows the portable radio telephone set in the preferred embodiment which comprises a CPU 31 including an arithmetic logic unit, a letter counter, a register set, etc. for receiving the ball moving distance signals generated in the rotary encoders 12 and 13 by cooperation with the ball 11, a pattern ROM 32 for storing patterns of the images of numerical and alphabetical characters, a program ROM 33 for storing a program, by which a telephone number signal and a station name signal of a called party are generated, a RAM 34 having a first region for storing data temporarily and a second region for storing data in non-volatile mode, an I/O port 35, a modulator/demodulator 36 for modulating the telephone number and station name signals of the called party and demodulating a signal received from another station, an amplifier 37 for amplifying the modulated signal and a signal supplied from the microphone 4, an amplifier 38 for amplifying the received signal supplied to the receiver 5, a transmitting and receiving apparatus 39 for transmitting the modulated signal to air by the antenna 6 and receiving a signal received by the antenna 6, and an LCD driver 40 for driving the LCD display 3 to display a telephone number and a station name of the called party, etc. In operation, the calling party holds the portable radio telephone set in the hand, as shown in Fig. 1, and presses the ball 11 of the information input unit 2 on an appropriate plane such as a desk to draw numerical or alphabetical characters such as a telephone number or the station name of a called party. Then, the ball 11 is rotated to rotate the rollers 14 and 15, the rotation speeds of which are proportional to ball moving distances of the X- and Y- directions. Consequently, the ball moving distance signals X and Y having a number of pulses proportional to the X- and Y- ball moving distances are generated for a predetermined time t in accordance with the light shielding effect by the teeth on the outer peripheries of the gears 18 and 19 in the rotary encoders 12 and 13, respectively, as shown in Fig. 4A, and are supplied to the CPU 31, in which the pulse numbers x and y are counted. The pulse number counting operation is sequentially continued for the successive predetermined time t. The counted values x, x' ..... and y, y' ..... are stored into the RAM 34 to provide a pattern of the image of a character, as shown in Fig. 4B. This pattern is compared with a pattern stored previously in the pattern ROM 32, so that the input pattern is determined to be a character which is equal to a character defined by the pattern of the pattern ROM 32, when both patterns coincide. This determined character is displayed on the display 3 by the LCD driver 40. In Fig. 1, the displayed telephone number is "123-4567". This operation will be explained in more detail in conjunction with Figs. 5A to 5C. The ball moving distance signals X and Y are supplied from the X- and Y- encoders 12 and 13 to the CPU 31 (step S 1 ), and the pulse numbers x, x' ..... and y, y' ..... of the ball moving distance signals X and Y are counted (step S 2 ). When the ball moving distance signals X and Y cease to be supplied to the CPU 31 (step S 3 ), a pattern defined by the counted pulse numbers x, x' ..... and y, y' ..... of the ball moving distance signals X and Y is compared with a pattern in the pattern ROM 32 (step S 4 ). When matching of the both patterns is detected in this comparison (step S 5 ), the content of the letter counter is checked (step S 7 ). On the other hand, when the two patterns do not coincide, an error is displayed on the display 3 (step S 6 ). When the letter counter is zero, an input letter is checked as to whether it is numerical or alphabetical (step 8). As an example consider the telephone number "123-4567 corresponding to NIPPON DENKI". The first input letter "1" is numerical character, so that a dial input mode is set and the input letter is displayed on the LCD display 3 (step S 12 ). As a result, the content of the letter counter is increased by one (step S 13 ). Thus, the input of the telephone number "123-4567" is carried out. In this dial input mode, the registration mode is not set (step S 14 following step S 7 ), because the telephone number "123-4567" is not completely supplied to the CPU 31. The second to final (seventh) character "2" to "7" are numerical (step S 15 ), so that these characters are in turn displayed on the LCD display 3 (step S 12 ), and the character counter is increased one by one (step S 13 ) to finally count "7". When the telephone number "123-4567" is completely dialed by manipulating the main body 1 having the information input unit 2, the character "M" is then drawn to be supplied to the CPU 31. As a result, the telephone number "123-4567" is transferred to be stored into the first region of the RAM 34 (step S 16 ), so that the registration mode is set (step S 17 ). Next, character image patterns of the station name "NIPPON DENKI" of the called party which is defined "α-TAG" in the flow chart as shown in Fig. 5 are supplied to the CPU 31. The input characters are alphabetical (step S 32 following step S 14 ), so that the input characters are in turn displayed on the LCD display 3 (step S 36 ), and the character counter is increased one by one to finally count "18" ("7" + "11") (step S 37 ). When the input of the station name is completed, the character "M" is then drawn to be supplied to the CPU 31, so that the station name is transferred to be stored into the first region of the RAM 34 (step S 33 ) together with the telephone number. When the station name is stored in the first region of the RAM 34 following the store of the telephone number, these contents are cleared in the first region of the RAM 34 to be transferred into the second region of the RAM 34 (step S 34 ). Thus, the telephone number "123-4567" of the called party and the station name "NIPPON DENKI" corresponding thereto are stored into the second region of the RAM 34. At the same time, the character counter is cleared (step S 35 ). In this state, when the called party's station name "NIPPON DENKI", and then the character "S" are drawn to be supplied to the CPU 31 by use of the information input unit 2, the station name is stored in the first region of the RAM 34 (step S 10 ), the character counter is increased one by one to finally count "11" (step S 11 ). The second region of the RAM 34 is accessed for the index of "NIPPON DENKI" and to check for data coincidence (step S 19 and S 20 following step S 18 between the draw station name and the stored station names . The telephone number "123-4567" indeced with the coinciding stored station name is read from the second region of the RAM 34 to be modulated in the modulator/demodulator 36 and amplified in the amplifier 37. Then, the amplified telephone number is transmitted from the transmitting and receiving apparatus 39 through the antenna 6 to air (step S 21 ). Then, the called party's station name stored in the first region of the RAM 34 is cleared (step S 22 ), and the content "11" of the character counter which is increased by the input of "NIPPON DENKI" (step S 30 and S 31 ) is cleared (step S 23 ). On the other hand, when no data coincidence is detected (step S 20 ), "error" is displayed on the LCD display 3 (step S 24 ), and the telephone number calling operation is then abandoned (step S 25 ). In the following example, it is assumed that the telephone number "123-4567" and the station name corresponding thereto are not in advance stored in the second region of the RAM 34. In such a case, the telephone number "123-4567" and then the character "S" are drawn on the desk to be supplied to the CPU 31 by use of the information input unit 2, so that the telephone number signal which is modulated in the modulator/demodulator 36 is transmitted from the transmitting and receiving apparatus 39 through the antenna 6 to air (step S 26 following step S 18 ). Then, the telephone number stored in the first region of the RAM 34 is cleared (step S 27 ), and the content "7" of the character counter is cleared (step S 28 ). When the letter "C" is supplied to the CPU 31 during the process, in which a part or whole of the telephone number or the station name corresponding thereto is supplied to the CPU 31, the process is abandoned (step S 29 ). On the other hand, when the character "C" is supplied to the CPU 31 in accordance with the termination of communication (telephone conversation), the connection is turned off between the calling and called parties (step S 9 ). That is, as a result of the letter input "C", all states are reset to provide an initial state. In this operation, instructions such as the completion of information input, the calling from a calling party to a called party, and the cancellation of input information are carried out by the letters "M", "S" and "C". Symbols "@", "&", etc., Greek letters "α", "β", "γ", etc. can also be used so that the letters "M", "S" and "C" can be used for the station name of a called party.

Claims: A portable radio telephone set, comprising: means (2, 31) for generating pattern signals representative of the images of alphanumeric characters and indicative of a telephone number; a memory (32, 34) for storing patterns representative of the images of alphanumeric characters; means (33) coupled to the memory (32, 34) and to the generating means (2,31) for comparing a said generated pattern signal and said stored patterns to generate a coincidence signal when the generated pattern signal corresponds to a stored pattern; and means (35, 36, 39) coupled to the comparing means (33) for transmitting a telephone number signal in response to said coincidence signal, wherein: said generating means, said memory, said comparing means, and said transmitting means are contained in a main body (1) having a pencil shape, said main body (1) being holdable by a hand of an operator; said generating means (2) includes a rotatable ball (11) movable on a surface partly protruded out of a first end of said main body (1) means (12, 13) for determining the distances said ball moves on said surface in first and second directions orthogonal to each other, and means for defining pattern signals representative of the images of characters from said determined distances; and said transmitting means is connected to an antenna (6) provided on a second end of said main body. A portable radio telephone set, according to claim 1, wherein: said determining means (12, 13) includes first and second photo-interruptors (23, 24) each having a light-passing and shielding gear (18, 19) which is rotated in a corresponding one of said first and second directions by said ball (11), each gear (18, 19) being positioned between a light emitting device and a light receiving device. A portable radio telephone set according to claim 1, wherein: said generating means comprises first and second encoders (12, 13) for generating first and second signals representative of the distances through which the ball is moved in first and second directions, respectively, orthogonal to each other, and means (31) coupled to the encoders (12, 13) for generating the pattern signals representative of images of alphanumeric characters in accordance with said first and second distance signals; said memory means comprising a first memory (32) for storing the patterns representative of images of alphanumeric characters; said telephone set further comprises a second memory (34) coupled to the generating means (31) and having a first region for storing said image pattern signals temporarily and a second region for storing said image pattern signals transferred from said first region in non-volatile mode; said comparing means (33) is coupled to the first memory (32) and to the second memory (34) for comparing a pattern defined by said generated pattern signals with a pattern stored in said first memory and generating a coincidence signal when the generated and stored patterns match; and said transmitting means comprises means (36) coupled to the comparing means (33) for modulating a telephone number from said coincidence signal, and means (39) coupled to the modulating means (36) for transmitting said modulated telephone number to air by an antenna (6). A portable radio telephone set, according to claim 3 wherein: said second memory (34) stores a telephone number of a party to be called and stores, in the firm of image pattern signals, a station name corresponding to said telephone number. A portable radio telephone set, according to claim 3 wherein: said ball (11) is partly protruded out of a first end of a pencil shaped main body (1); said first and second encoders (12, 13), said generating means, said first memory, said second memory, said comparing means, said modulating means, and said transmitting means are contained in said pencil shaped main body; and said antenna (6) is provided on the top of a second end of said pencil shaped main body. A method of operating a portable radio telephone set comprising the steps of generating a pattern signal representative of the image of one or more alphanumeric characters, comparing the generated pattern signal with stored patterns representative of the image of one or more alphanumeric characters and generating a coincidence signal indicative of a stored pattern when this stored pattern matches the generated pattern signal, and then transmitting a telephone number signal corresponding to the matched stored pattern, wherein the pattern signals are generated by moving a rotatable ball on a surface along a path corresponding to the shape of an alphanumeric character, measuring the distances moved by the ball in two orthogonal directions at successive predetermined time intervals and generating a string of pairs of distance signals corresponding to the distances moved in the two orthogonal directions in the successive time intervals.

Inventors: FUJIWARA RYUHEI, FUJIWARA, RYUHEI, FUJIWARA, RYUHEI, C/O NEC CORPORATION
Applicants: NIPPON ELECTRIC CO, NEC CORPORATION
Application year: 1991
Main classification: H04M1
IPC codes: H04M1, H04Q7, G06F3, G06K9