CN2549536Y - Electronic-book reading devices - Google Patents

Abstract

The utility model relates to an electronic-book reading device, which is formed by connecting and mounting a shell, a LCD, a key array, a computer interface module, a battery box and a circuit board. The position relationships of the components above are that: the LCD and the key array are arranged on the front panel of a chassis; the computer interface module and the battery box are arranged on the front side of the chassis first and then connected to the corresponding point of the circuit board through a lead; and the circuit is formed by electrically connecting a key board interface circuit, a micro computer interface circuit, a micro processor interface circuit, a LCD interface circuit and storing interface circuit one by one through signal wires. The utility model adopts compressing in partition, which can adequately use storing space and increase the length and number of a storing texture; partly decompression can decompress and read the needed and random content, thus greatly increasing reaction speed; and electronic device can be agile and convenient to be operated and used, thus can conduct advance, withdrawing, page up, page down and exit operation.

Description

A kind of electronic book reading machine

(1) technical field:

The utility model is a kind of electronic book reading machine, belongs to high-performance, consumer electronics product.

(2) background technology:

In the existing similar electronic product, the not employing e-text compress technique that has, storage space is not fully used, and electronics book, the quantity that can store are very limited; Though what have has adopted the e-text compress technique, the compression method that is adopted is not supported " part decompresses " function, and the average response speed that makes reading at random site content in the e-text require is slower.For a kind of compression method, if it can provide metastable ratio of compression, then the length of compressed file is long more, and reducing of the file length after the compression is just big more.So the file that compresses in the practicality is generally all bigger.For the unfixed-length coding method, even only use the last part that does not have text, the decompress(ion) that also text will be started anew in this case, has just caused the obvious time-delay of system responses.Particularly ability of data processing, limited embedded system and the microcomputer type portable equipment of storage capacity, this response time-delay will be quite obvious, and for this reason, we propose the part decompression method.We are that example specifies the facility that the part decompression method brings with novel Dream of the Red Mansion pandect.Think direct reading the 40th chapter such as the reader, if adopt the complete solution compression, need since the 1st chapter decompress(ion), the decompression time of front 39 chapters will be to reader's sensation of significantly delaying time, if but adopt part to decompress, novel is pressed chapter piecemeal compressed storage, then will be since the direct decompress(ion) of the 40th chapter, do not have the decompression procedure of front 39 chapters, so tangible time-delay can not occur.

(3) summary of the invention:

The purpose of this utility model is exactly to have the decompress(ion) that can only start anew in order to overcome and to solve existing electronic book reading machine, cause the obvious time-delay of its response, the compress technique that it adopted is not supported " part is separated compression functions ", the average response speed that makes reading at random site content in the e-text require is slower, can't make full use of storage space, so that store bigger, the shortcoming and the problem of more e-book etc., a kind of electronic book reading machine of research and design, it can use the e-text compress technique of support " part decompress(ion) " function, can utilize storage space fully, can store bigger, more e-book, the content that makes the user to read is abundanter, and the average response speed that the reading at random site content in the e-text is required is accelerated greatly.

The utility model is realized by following technical proposals: the contour structures synoptic diagram of this electronic book reading machine as shown in Figure 1, its circuit block diagram as shown in Figure 2, the circuit theory diagrams of one of embodiment as shown in Figure 3, its workflow block scheme as shown in Figure 4, its e-text compression process flow chart as shown in Figure 5, its part decompression flow process flow chart is as shown in Figure 6; It is connected and composed by shell 1, LCDs 2, push-button array 3, computer interface groove 4, battery 5, the common installation of circuit board, its mutual alignment and annexation are: LCDs 2 and push-button array 3 are loaded on the front panel of shell 1, and are electrically connected mutually by respective point on display signal line, keyboard input signal line and the electroplax respectively; Computer interface groove 4 is positioned at the positive side of shell 1, and interface slot 4 is equipped with the parallel connector of pin type and is electrically connected mutually by respective point on signal wire separately and the circuit board respectively; Battery 5 is positioned at positive side computer interface groove 4 right-hand of shell, and is electrically connected mutually with power supply end points on the circuit board by power lead; Its circuit is electrically connected jointly by keyboard interface circuit, microcomputer interface circuit, microcontroller circuit, liquid crystal display circuit, memory circuitry and constitutes, and its interconnected relationship is: microcontroller circuit is electrically connected with keyboard interface circuit, microcomputer interface circuit, liquid crystal display circuit, memory circuitry respectively mutually by keyboard interface signal wire, microcomputer interface signal wire, liquid crystal display signal wire, memory signals line respectively; Wherein: microcontroller circuit is made of singlechip chip IC1; Keyboard interface circuit is made of keyboard interface chip IC 5; Microcomputer interface circuit is made of microcomputer interface chip IC 6; Liquid crystal display circuit is connected and composed jointly by control chip IC3, the coding chip IC4 of LCD display module; Memory circuitry is electrically connected jointly by flash memory in flash memory IC2 and the microprocessor and constitutes.

The course of work of this electronic book reading machine is as follows: leave the form of the e-book employing compressed file in the reading machine in, rather than traditional simple characters coded file; Can urtext be compressed with supporting with it computer software, the output file with compression pours in the reading machine then, also urtext can be directly inputted in the reading machine, compresses on reading machine and stores; Reading machine can be as required at any time by being connected to the cable renewal e-book content wherein of computing machine; When utilizing reading machine to read, reading machine de-compresses into the simple characters coding with the e-book of compressed file form earlier, is presented on the LCDs again and reads for the user.Wherein the pairing operation of keyboard action have advance, retreat, preceding page turning, back page turning and withdraw from etc.A kind of dictionary type text compression methods (LZ77 method) of classics is as follows: the data structure of LZ77 method normally one long be the linear table (array) of n, be called workspace cache district (Working Buffer), it is divided into two parts: long is that the buffer zone (HistoryBuffer) of p character and length are the input prediction buffer zone (Look Ahead Buffer) of (n-p) individual character, and wherein the value of (n-p) is little more a lot of than p usually.Its cataloged procedure can be described below (1) initialization history buffer.From inlet flow, read q character and insert the prediction buffer zone; (2) in history buffer, seek with the prediction buffer zone in the maximum match of character string; (3) with certain form the original coding that finds a character (new char) of coupling string back in reference position (addr), the length (len) of coupling string and the buffer zone of looking forward to the prospect in the history buffer being encoded into a compressed character code together outputs in the compression output stream; (4), and from input, read the blank space of len+1 character fill to prediction buffer zone afterbody with the distance of the data in the job buffer to len+1 the character of direction translation of old character; (5) since the second step repetition said process, in inlet flow, there has not been untreated character.As seen, in the whole cataloged procedure, job buffer seems a window that slips on text to be compressed, so this method becomes the dictionary compression method of " based on moving window " again.Decode procedure is more simple, and can not use the prediction buffer zone.Only need the position in the pairing history buffer of addr from the compressed character code that receives to begin to duplicate len character in the decompression output stream during decoding, with len+1 the character of direction translation of the character in the job buffer to old character, duplicate the blank space of an above-mentioned len character to the afterbody of history buffer simultaneously, the fresh character with explicit coding in the compressed character code adds in the decompression output stream and history buffer afterbody blank space at last.

The e-text compression method that the utility model adopts is a dictionary type text compression methods of supporting that piecemeal compression and part decompress, reading machine is decompressed to current reading position with compressed text, on LCDs, show a screen literal, and can require forward and page turning backward according to user's operation; " part decompresses " method is to wait length to cut apart the support of the method realization of recompression to " part decompresses " function by elder generation, and improves ratio of compression by prestrain dictionary before compression; The partial code that makes the reading function skip text so directly decompresses to required code block, can improve the response speed of system effectively for big length text; Concrete compression and decompression procedure are as follows: (1) piecemeal compression: according to the feature of text, be that unit is cut apart with text 1., perhaps for the big text of no obvious characteristic, can wait length to cut apart; 2. the text unit after cutting apart is handled successively, the classical dictionary type of the direct usefulness text compression methods of first module is compressed; Since Unit second, the beginning with first module earlier partly is pre-loaded in " dictionary " of common dictionary type text compression methods, according to this dictionary this unit is compressed with classical dictionary type text compression methods again; (2) part decompresses: 1. obtain the unit information that part text that the user will read is positioned at; 2. judge whether this unit is first module, if first module then directly decompresses with classical dictionary type text compression methods to first module and exports; If not first unit, then with the decompress beginning part of first unit of classical way, to obtain in " dictionary " that text is pre-loaded to classical dictionary type text compression methods, then according to this dictionary with the output that decompresses of classical dictionary type text compression methods.

The utility model compared with prior art has following advantage and beneficial effect: (1) the utility model adopts " piecemeal compression " technology, and storage space can be fully used, and electronics book, the quantity that can store all improve a lot; (2) the compression method support that the utility model adopted " part decompresses " function, the too big quickening of average response speed that can require at the reading of random site content in the e-text; (3) bigger, the more e-book of this e-book reading function storage, user's reading content is abundanter, the pairing operation of its keyboard action have advance, retreat, preceding page turning, back page turning and withdraw from etc., make manipulate very convenient, its LCDs has the human-computer interaction interface of graphic form, be simple and easy to usefulness, can select the e-book that to read before using flexibly and easily, also can select to begin in the e-book position of reading easily.

(4) description of drawings:

Below Figure of description is further specified as follows: Fig. 1 is the contour structures synoptic diagram of this electronic book reading machine; Fig. 2 is the circuit block diagram of this electronic book reading machine; Fig. 3 is the circuit theory diagrams of one of this electronic book reading machine embodiment; Fig. 4 is this electronic book reading machine workflow procedure block scheme; Fig. 5 is a piecemeal compressed software program circuit flow chart; Fig. 6 is a part gunzip flow diagram.Among Fig. 1: the 1st, shell, the 2nd, LCDs, the 3rd, push-button array, the 4th, computer interface groove, the 5th, battery.

(5) embodiment:

The inventor has implemented the utility model preferably through years of researches, design, test.The inventor thinks that realization optimal way of the present utility model can be as follows: press shown in Fig. 1 institute (1), can select aluminum alloy materials for use, and adopt the shell of these electronic book reading machines of machine-tooled method processing and manufacturing such as punching press, also punching press is set on the front panel of casing 1 the big small square hole of LCDs 2 and fitting key array 3 is installed, stay in the positive side of casing 1 and establish interface slot 4 and the battery 5 that computer interface spare is installed in also punching press.Wherein: LCDs can be selected high-resolution lattice liquid crystal display screen for use; The optional button keys of push-button array; The optional pin type parallel interface of computer interface spare part; Battery can adopt battery No. 7; (2) press Fig. 2, draw PCB shown in Figure 3, screen components and parts then connection is installed, for example: the AT89C51 singlechip chip that processor IC1 can adopt U.S. Atmel company to produce, its instruction set and widely used Intel 51 series are compatible, chip integration becomes the flash memory of 4K byte, but program repeated multiple times ground is directly write on the chip; Chip IC 2 can adopt M29W400B, and it is the large flash memory of 256K word, is used to store special be the control program that native system customized and the e-book of compressed file form; Software on the flash memory is carried out by the AT89C51 single-chip microcomputer; The control chip of the LCD display module of IC3 can adopt the K0713BT-01 of Sumsung; IC4 is the 3-8 coding chip, can adopt 74LS138; IC5 is the keyboard interface chip, can adopt 74LS244; IC6 is the microcomputer interface chip, can adopt 74LS245.After in machine, installing circuit board, can be electrically connected, just can implement this electronic book reading machine preferably by described its position of top instructions and interconnected relationship; (3), and each software program is stored in the storer of electronic reading by Fig. 4～each software program of writing shown in Figure 6; After this machine powers on, carry out resetting of hardware at first automatically, then, software program carries out initialization to relevant storer, enters the execution of master routine again.LCDs adopts high-resolution lattice liquid crystal display screen, has the human-computer interaction interface of graphic form, is simple and easy to use.The user can select the e-book that will read neatly, also can select to begin in the e-book position of reading.

Claims (2)

1, a kind of electronic book reading machine, it is characterized in that: it is connected and composed by shell (1), LCDs (2), push-button array (3), computer interface groove (4), battery (5), the common installation of circuit board, its mutual alignment and annexation are: LCDs (2) and push-button array (3) are loaded on the front panel of shell (1), and are electrically connected mutually by respective point on display signal line, keyboard input signal line and the electroplax respectively; Computer interface groove (4) is positioned at the positive side of shell (1), interface slot (4) is equipped with the parallel connector of pin type and is electrically connected mutually by respective point on signal wire separately and the circuit board respectively, battery (5) is positioned at positive side computer interface groove (4) right-hand of shell, and is electrically connected mutually with power supply end points on the circuit board by power lead.

2, by the described a kind of electronic book reading machine of claim 1.It is characterized in that described circuit is electrically connected jointly by keyboard interface circuit, microcomputer interface circuit, microcontroller circuit, liquid crystal display circuit, memory circuitry constitutes, and its interconnected relationship is: microcontroller circuit is electrically connected with keyboard interface circuit, microcomputer interface circuit, liquid crystal display circuit, memory circuitry respectively mutually by keyboard interface signal wire, microcomputer interface signal wire, liquid crystal display signal wire, memory signals line respectively.

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