JPH01209492A - Pocket type display device for displaying character and image received with wireless - Google Patents

Abstract

PURPOSE: To miniaturize a pager capable of displaying the large amount of information such as Chinese or the like by using an optimum bit number and addressing only one entrance from a fixed length character font table capable of covering infinite characters and pictographs by a floating storage method. CONSTITUTION: This device is constituted of a microcontroller unit A, a RAM B, a complementary metal oxide semiconductor/masking ROM C, a liquid crystal display segment driving circuit D, a liquid crystal display common driving circuit E, a high contrast liquid crystal display device F and a liquid crystal display power source circuit G. Then, a floating storage technique(FST) is applied and data words are converted to the characters and/or images to be displayed by a method for enlarging the total number of the displayable characters and/or images to be more than the N-th power of 2 (2 raised to the N-th power) by using one or more data words of the N-th power of 2 possible for changing conversion and/or the method used in character generation. Thus, the large-scale vocabulary of Chinese or the like is stored in the storage device of the size of about a cigarette case.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pocket-type display device that displays characters and images received by a wireless device, and more specifically, alphanumeric characters, hieroglyphs in oriental languages such as Chinese, Korean, Thai, etc. Or it relates to a display device that displays graphic information.

It is well known that it is very difficult to produce receivers for the hieroglyphic Behnoer (PAGCR) language for two reasons described below.

(a) Many Oriental languages have many more scripts and hieroglyphs than do European languages of the English type. In particular, the Chinese language is composed of over 50,000 different characters. Therefore, without the invention of special storage techniques, it is not possible to store such a large number of words in a pager with a storage device the size of a 20-person cigarette case. Will. This point is important for pocket-type wireless pager receivers.

(b) It generally takes more transmission time to convert Oriental language characters than ordinary alphanumeric characters, due to the large number of characters that require long codes to identify each individual character (an important factor in paging). Unless special message recognition techniques, characterized by It becomes expensive. Of course, there are now many wireless base receivers that can provide English and alphanumeric information to the user. However, there is no wireless pager receiver that can receive and display Oriental languages, especially Chinese by solving the above-mentioned problems.

The usefulness and appeal of this information display pager would be greatly enhanced by providing the user with a pager capable of displaying a large amount of information in a variety of different Oriental languages, especially Chinese, the most commonly used language.

An additional advantage of current pagers is that they are equipped with an identification code (ID) J that is written into a single read-only memory and permanently fixed there. is called a code plug, and allows a paging company to address each pager receiver.Another innovative concept that does not use a code plug to indicate its identity. It would be extremely convenient from a cost and effectiveness standpoint to have a pager that uses a It also includes a pager that is physically returned to the paging station.

The first feature of the invention is that alphanumeric characters and/or Chinese characters,
hieroglyphs, such as Korean and other oriental languages, including Thai;
and/or a display device for displaying graphical information, and a wireless receiving circuit for receiving encoded characters and/or images to be displayed;
or one or more display devices for displaying images, and processing circuitry for receiving wireless messages, such as N-bit message data words from wireless receiving circuitry, and for modifying the conversion and/or method used in character generation. data in such a way that the total number of characters and/or images that can be displayed is expanded to more than 2 to the N power (2 raised to the N power) using as many 2 N data words as possible. The object of the present invention is to provide a display device characterized in that it has a processing circuit for converting words into characters and/or images to be displayed.

A second feature of the invention is a wireless receiving circuit for receiving a wireless message, one or more display devices for displaying the received wireless message in the form of text and/or images, and a wireless message receiving circuit for receiving a wireless message. processing circuitry for converting data words of received messages into characters and/or images to be displayed; and apparatus for storing values of one or more parameters for use in the circuitry of the device to determine the operation of the circuitry; 1 in response to one or more instructions encoded in
The present invention provides a display device characterized by having a device for setting more than one parameter to a required value.

These features of the invention are applicable to display devices,
It is particularly applicable to separate or combined wireless paging devices.

From the following description, it can be seen that the two features of the present invention are used to solve the problems mentioned above, and that the two features together can receive and display any Oriental language, especially Chinese, and code plug. It will become clear that individual paging companies can provide addressable pagers without the need for individual paging companies. Custom mode “single chip” with specially designed software program
Microprocessor Application Special Integrated Circuit (AS IG)
°Using a controller, the wireless pager receiver can use radio frequency channels to store message data collected by the electronic data receiving module in random access memory (RAM), and at the same time Using a floating memory method (described later), the character font table stored partly in the read-only memory (ROM) for character generation and partly in the read-write memory (RAM) is searched, and the graphical liquid crystal Messages received can be displayed on a display device, as well as the invention (described below) to dynamically identify a particular pager receiver from all receivers. The wireless pager receiver itself can store many messages to the user for later review. The pager controls the messages that are displayed.

- can be viewed one by one in the forward or backward direction, and when the control reaches the end of the message, the first message, second message, etc. are displayed again. Even if the message is too long, the control device allows the valley message to be displayed in frame frj. Users can also select messages they want to delete from memory.

The control device allows the user to turn on and off the brightness of the background of the liquid crystal display, and also to turn off the sound the moment a message is received.

A first feature of the present invention is that the floating storage technique (F S
Use the optimal number of bits by means of T )! 11 (allows a single entry point to be addressed from a fixed-length character font table that can cover limited characters and hieroglyphics. This is explained below.

Let us assume that "N" bits are used to represent an address code representing a single character in, for example, an oriental language. An N-bit code can typically address up to "2 to the N power" entrances, and a valley code corresponds to each character. The floating storage technique allows for the use of 2 to the Nth power of available codes as described below. In particular, the code for losing 2 to the N power is divided into four usages.

Usage 1 By combining rXJ, use the character font table in read-only memory (ROM).
Address a fixed entrance.

Usage 2 A combination of rYJ addresses an rYJ fixed population using a character font table located in random access memory (RAM). This table can be modified by the system's controller upon command from the radio frequency channel.

Usage 3 The combination of "Z" creates a [phrase (phr
ase) Address J. These pointers are stored in random access memory, receive commands from the radio frequency channel, and can be modified by the system's controller.

Usage 4 By combining “1”, the requested character font is “
If a graphic is requested to be displayed or is not present in the " You can instruct the system to assemble the end of the bit pattern in any suitable way, e.g. with one bit pattern following the end (such as the bit pattern indicating the activation of usage 4), or with the end of the sent image. Can be displayed with a preamble indicating length, width and coordinates.

It is clear that the sum of "X", "Yo", "Z" and "I" is still equal to 2 to the N power. However, this technique has the following unique advantages over other conventional methods: There is.

Usage l is a colloquial word that refers to efficient and fast processing or conversion.
Can be used to hold the most commonly used characters/hieroglyphs.

Usage 2 can be used to extend the ability of the system to recognize the entire script/hieroglyph set of that particular language without any restrictions on facets.

Usage 3 describes commonly used phrases that may consist of strings of letters or hieroglyphs of any length.
It can be represented using only “N” bits. this is,
It shows that data storage space and authorization (l1cencO) conversion time can be greatly reduced, and message conversion time is the most valuable and important factor in the paging industry.

Usage 4 further allows the system to recognize information other than text messages as well as graphical information in any form. In the paging industry, pager receivers are small facsimile receivers.

An example of the application of the floating storage technique (FST) to Chinese, particularly to wireless pager receivers, and by choosing a random example, a fixed 4,000 characters can be used to define 99 terms used in the paging industry. Statistically, it can be seen that more than % can be covered. It is therefore possible to identify the entry of a character from the character font table using just a 12-bit (I, 5 byte) address. In other words, “N
If “ is 12 bits, and “X” is 4.000
The combination addresses a total of 4,000 fixed characters in 128 kilograms by 8 bits of read-only memory.

The 32 combinations of rYJ address a total of 32 programmable characters from a character font table located in a portion of 8 kilobytes by 8 bits of random access memory.

The 63 combinations of ``Z'' address a total of 63 programmable phrases in an 8 x 8 bit random access memory.

A single combination of “stars” addresses graphical information that is boat fishing.

According to the second feature of the present invention, the pager identification code (I
D) It is possible to prevent the read-only memory having an identification code (ID) from having to be changed due to the change. Paging companies simply send commands to pagers from wireless radios to achieve similar results. By eliminating the code plug, space is saved and the pager can be made smaller. This second feature provides a dynamic identification (ID) technique;
Dynamic identification (ID) techniques ensure that the pager's identification code is not stored in read-only memory and has a lifetime of 10
Stored in a portion of non-volatile message random access memory backed up by a lithium battery. Thanks to intelligent control by a custom microcontroller, this identification code is not fixed in advance and can be easily changed by the paging company by sending commands to the receiver over a radio frequency channel. Furthermore, two or more identification codes for different applications can be stored simultaneously, making it easier and more effective to send news of different fields to specific subscriber groups.

The term "wireless paging device" as used in the description and claims of the present invention is not limited to devices used solely for the purposes described herein, but is intended to apply to any small device with the functionality described. It is. In particular, not only when used as a dedicated device, but also for small electronic devices that have a display device, can receive wireless paging transmissions and display them on the display device, and have accessories or inputs. The present invention is applicable.

Embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments.

Embodiment - FIG. 1 is a block diagram showing a basic circuit of a display device according to the present invention, and FIG. 2 is a block diagram showing a basic circuit of a display device according to the present invention, and FIG. FIG. The configuration of the illustrated pager is as follows.

Microcontroller unit Δ (custom one-chip MCU I [D6140
80 manufactured by Hitachi, Japan), preferably 2 l/
2 inches x 3 inches XI/2 inches (63,5x76x
Complementary Metal Oxide Semiconductor Mask Read Only Memory (Character Generator ROM, HN 62
32I r3 P, manufactured by Hitachi, Japan) C, 16XI28
It can display dot shapes and a certain number of special languages (for example, Chinese, which can display 8 characters using a 6x16 dot font), and can display two LCD segment drive circuits (1- ID61102.Made by Hitachi, Japan)
D, LCD common drive circuit (II D61103, manufactured by Hitachi, Japan) E, and high contrast liquid crystal display device (Seiko Ring) F. All LCD modules are driven by a specially designed LCD power supply circuit G. LCD display 4, message data and one or more pager identification codes, and programmable several oriental language characters, especially Chinese characters, 8 kg for storing fonts and phrases
Read/write random access memory (RAM) with an 8-bit capacity and powered by a lithium battery.

11N6264r;'LP-3. (manufactured by Hitachi) B. The key panel J consists of one three-position slide mode switch for operating the pager and five button buttons for user operation. The configuration of the radio (RF) receiving module ■1 is as follows. RF tuning circuits, amplifiers, filters and waveform shaping circuits that are hybrid devices for capturing data signals from the air, beepers and emission diodes (LEDs) that generate audio and visual alarm signals for received messages, and radio reception. One 1.5 volt AA-sized battery powers Module H, and one DC voltage boosts the voltage from the battery to power the rest of the equipment.
It consists of a DC exchanger 11 and a miniature light bulb or other lighting device that illuminates the rear of the liquid crystal display device.

The pager is designed and programmed (see Figure 2) to receive specially encoded messages and to display characters of an Oriental language, particularly Chinese, under the control of a user. The operating principle of the pager will be described below.

Paging companies use paging computer systems to convert messages in Eastern languages, particularly Chinese, or graphical information contexts into streams of binary bits based on floating memory encoding algorithms, and to transfer the messages to specific pager recipients. With the addition of some self-error correcting redundancy bits in relation to subscriber tones or groups of subscribers, Universal Boxag (Universal Boxag)
Based on the POCSAG standard (CCIR Radio Paging Code No, I) all data bits are encoded into a complete message packet and transmitted over the air via a specific radio frequency channel.

When the pager is powered on, the microcontroller unit A constantly activates the wireless receiver module 11 to check whether there is a message that attracts attention and stores the identification code associated with the message and the random access memory B.
Detection is performed by comparing the base station's identification code with the base station's own identification code stored in the base station based on a dynamic identification technique. If the result is a message, microcontroller unit A stores the message in random access memory B for subsequent repeated testing, and simultaneously stores the message in read-only memory C and random access memory B.
Another programmable character font table or phrase table in memory B is searched, and the message is converted into Oriental language, Chinese, or other graphical information and displayed on the liquid crystal display. Furthermore, the wireless receiving module 1 is again controlled by the microcontroller unit 8.
1, the beaver emits an alarm sound and lights up a light emitting diode, but the user can turn off the sound by pressing any button on the key panel J. Otherwise, the microcontroller unit 8 will automatically make the sound disappear after about 8 seconds. The battery, one DC-DC converter I, and the liquid crystal display power supply circuit G distribute power to each module during pager operation.

If the environment is dark and the LCD display cannot be seen clearly, the user can press the "Light Button" on the key panel J to turn on the miniature light bulb or turn on other lighting devices to brighten the display. .

If the user does not like to disturb third parties with the sound of the beaver, a vibrating alarm sound device may be used instead.

The pager is equipped with manual and automatic time shut-off devices to reduce power consumption, and also includes a low battery alarm/display device.

The program of the microcontroller unit A decodes information encoded in a stream of bits by a specially designed oriental language, especially Chinese, encoding system according to the present invention, based on said floating storage technique. and standard P
It is in OCSAG format and transmits at speeds of 512 baud or higher, switchable by paging companies. This is also applicable to standard POCSAG alphanumeric displays.

During data reception, the pager has 2-bit self-error correction for identification code matching and 3-bit error correction for message recovery to ensure maximum reception reliability. Bit self-error correction and 2-bit machine repair I
It has an E function.

Random access memory B includes: 1) The pager can store up to 32 separate messages, with the maximum length of each message being subject to the use of floating storage techniques, but with no practical limit. Standard alphanumeric messages sent in mark POCSAG format can also be identified. The screen format of the liquid crystal display device is different between Oriental languages, especially Chinese display mode, and alphanumeric character display mode. In the former, many oriental languages can be displayed in each frame, especially +6×! 6
Eight Chinese characters in dot font can be displayed.

In the latter case, 2 lines x 21 characters of 5 x 7 dot font characters can be displayed in a valley frame. Furthermore, the pager is adaptable to both uppercase and lowercase alphabets.

Detailed user operations regarding the pager will be described below.

The pager is programmed to operate in one of four ways:

(a) The active microcontrol unit A is located on the key panel J.
Implement the user's commands from the wireless receiving module ■−
Allocate free time (gpare) periodically to check whether all messages have been received from ■. In this state, power is supplied to all components.

(b) Approximately 30 seconds of inactivity, if no keys on the keyboard are pressed or the user deletes all stored messages.
If used repeatedly, the system will move from active to inactive state. In this state, the power to the liquid crystal display device is turned off.

(c) Disabled State Upon receiving a disabled command, the pager enters this state. This state is similar to the inactive state, except that upon receiving an enable command on a transmission, the next user command becomes valid.

(d) Hibernation The burner enters this state when the user slides the mode switch to the off position.

All components except random access memory B are powered down. By sliding the mode switch to the on position, the pager is enabled to receive subsequent messages.

The normal operation of pager operation in active and inactive states is described below.

The key panel J is equipped with the keys, switches and buttons shown below, and the microcontrol unit Δ
is properly programmed to operate as described above.

■Mode switch: 3rd place that determines the user's operating mode 2゛I Nislide switch ON = pager is active or inactive, alarm sounds and light emitting diode lights up whenever it receives a message do.

M: Exactly the same as ON mode except that the alarm does not sound.

OFF: The pager is in a dormant state and all stored messages are erased.

■Next button: If the message is too long to fit in one frame, the user can check the convex message frame by frame.

■Read button: Allows the user to read the next message in the forward direction. The last message is in the first position of the random access memory buffer.

■Back button: Allows the user to read the next message backwards.

■Delete button: Allows the user to delete the message currently being adjusted from the random access memory buffer. To delete all messages, the user can press both the read and back buttons.

■Light button: By pressing this button, the display illumination becomes brighter.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a pager circuit of a display device according to the present invention, and FIG. 2 is a block diagram showing a pager circuit of a display device according to the present invention, and FIG. 2 shows another submodule incorporated therein to configure a wireless pager receiving device of the display device. It is a figure showing a case. In the figure, A...Microcontroller unit B...Read/write random access memory C...Complementary metal oxide semiconductor mask read only memory D...Liquid crystal display segment drive circuit E...Liquid crystal display common drive circuit F...High contrast liquid crystal display device G...Liquid crystal display power supply circuit H...Wireless reception module...DC-DC exchanger J...Key panel K...・・1.5 volt・AA size・Battery l,・
...σ light bulb! ...PCP Double/Key Switch 2
...Module A (wireless device, DC-DC converter, speaker and light emitting diode drive circuit, and low battery voltage detector and microprocessor reset circuit) 3...Module B (microprocessor, random access memory , read-only memory,
and liquid crystal display device drive circuit) 4...Liquid crystal display device 5...DPTT slide
Switch 6...Light emitting diode 7...Speaker 8.9...Zebra (ZEnRA) connector 10...
・Heat seal connector 11...AA size battery i matter 12...Connector that connects module A and module B

Claims (23)

[Claims] (1) a wireless receiving circuit for receiving a wireless message of coded characters and/or images to be displayed, at least one display device for displaying said received characters and/or images, and N bits from said receiving circuit; A processing circuit for receiving said wireless message as a message data word, with N of 2 being enabled for modifying the transformations used to generate said characters and/or images.
said processing circuit for converting in such a manner that the total number of characters and/or images to be displayed is expanded by at least 2 to the N power (2 raised to the N power) using at least one of the power data words; alphanumeric characters, hieroglyphics of oriental languages such as Chinese, Korean, Thai, etc., received by a radio device characterized by
Or a pocket-type display device that displays graphic information. (2) The above claim, wherein a predetermined number X smaller than 2 to the N power among possible combinations of 2 to the N power is used to address a character in a preset character table. The display device according to item 1. (3) The display device according to claim 2, wherein said X is 12 and M is about 4,000. (4) N of 2 among the possible combinations of 2 to the N power
A predetermined number Y smaller than the power of the character (a) whose image data is stored in the read/write memory
, or for accessing a character (b) stored in one of a number of preset tables that can be changed by a processing circuit. Or the display device according to item 3. (5) The selectable image data (a) or the table (b) available for selection can be set by command data received as part of the paged wireless message. display device. (6) The display device according to claim 4 or 5, wherein the Y is about 32. (7) Among the possible combinations of 2 to the N power, 2 N
Claims 1 to 6, wherein a predetermined number Z smaller than the power is used to address a stored code string which is converted in a processing circuit into a multi-character display message or a part thereof. Display device as described. (8) The display device according to claim 7, wherein the Z is approximately 63. (9) The display device according to claim 7 or 8, wherein the stored code string can be set by command data received as part of a paged wireless message. (10) Each of the above claims, wherein the processing circuit responds to one of the combinations of 2 to the N power received as a message data word handling one or more subsequent words as bit image data for generating an image. The display device described in . (11) a wireless receiving circuit for receiving a wireless message; at least one display device for displaying the received wireless message such as text and/or images; and at least one display device for displaying the received wireless message such as text and/or images; or between the processing circuit for converting into an image and the reception of the wireless message by the wireless reception circuit, at least one parameter value is stored for use in the circuitry of the device to determine the operating characteristics of the circuitry; Display device, characterized in that it consists of a device responsive to at least one command encoded in a received message to set a required value. (12) The display device is a wireless paging device, and the at least one parameter comprises an identification code for use in circuitry of the device to determine whether a message via the received wireless page is addressed to the device. The display device according to item 11. (13) Claims 1 to 10, and 11.
13. The wireless paging device according to item 1 or 12. (14) A display device according to any one of claims 1 to 13, further comprising a control device designed to scan the displayed message in either direction. (15) The display device according to claim 14, wherein the control device is capable of examining each message frame by frame to determine whether the message length exceeds a single frame display capacity. (16) A display device according to claim 14 or 15, characterized in that the control device is designed to repeatedly display a stored message or a part thereof. (17) The display device according to any one of claims 14 to 16, further comprising the control device designed to be able to delete all or selected messages stored therein. (18) A display device according to each of the preceding claims, comprising a storage device having a capacity for storing codes of at least 1,000 Oriental language characters, in particular Chinese characters. (19) The display device according to claim 18, further comprising the storage device having a capacity to store a code of at least 1,500 alphanumeric characters. (20) A small wireless pager according to any one of claims 1 to 19, which incorporates a wireless paging circuit for receiving wireless pager messages and a display device for displaying received messages. (21) The display device according to each of the above claims, which is pocket-shaped. (22) External dimensions are approximately 2 1/2^■×3^■×(1
/2) The display device according to each of the above claims. (23) The display device according to each of the preceding claims, comprising an accessory for connection to a pocket digital radio transceiver, a small telephone, a television set, or a videotape/disc player.