WO2014000659A1 - Printing control method and printer - Google Patents

Abstract

Disclosed is a printing control method. The printing control method comprises: S1, acquiring a lateral compression expression according to the lateral compression ratio, and acquiring the number m of microsteps in a line according to the longitudinal compression ratio; S2, acquiring original dot matrix data; S3, compressing each dot-line data of the original dot matrix data according to the lateral compression expression to generate compressed dot matrix data; S4, each time a motor moves m microsteps, the motor prints a dot-line data of the compressed dot matrix data. Also disclosed is a printer using the above printing control method, providing fast printing speed and saving paper during compressed printing.

Description

 Print control method and printer

This application claims the priority of the Chinese Patent Application Serial No. 201210222146.1, entitled "Print Control Method and Printer", filed on June 29, 2012, the entire disclosure of which is hereby incorporated by reference. TECHNICAL FIELD The present invention relates to the field of printing, and in particular to a print control method and a printer. BACKGROUND OF THE INVENTION A conventional printing system generally uses two data processing methods for printing. The first data processing method is that a print information generating device (such as a computer) generates dot matrix data and sends it to a printer, and the dot matrix print data is directly printed by the printer; The data processing method is that the print information generating device generates character print data including a text code and various typesetting instructions, and sends the character print data to the printer according to the typesetting instruction, such as line spacing, character spacing, etc., according to the text. The code looks up the dot matrix data of the character corresponding to the text code stored in the non-volatile memory of the printer to convert the character print data into dot matrix print data. In recent years, with the increase in environmental awareness, users have demanded that printers have a paper saving function, thereby reducing the consumption of printing media. For example, reduce the width of the print medium, such as replacing the print medium with a width of 80 mm with a print medium with a width of 56 mm, or shorten the length of the print medium, such as printing the original print length of 150 mm on 100 mm long print media. The printing medium having the original printing width of 80 mm and the printing length of 150 mm is printed on a printing medium having an actual width of 56 mm and a length of 100 mm. In order to achieve the above object, the related art provides a print control method for processing original dot matrix data by an interpolation algorithm according to a compression ratio. Due to the compression printing by the interpolation algorithm, the higher the print quality requirement, the higher the calculation accuracy requirement for the interpolation algorithm. However, the higher the calculation accuracy of the interpolation algorithm, the larger the amount of data processing calculation, resulting in slow data processing speed, which affects the printing speed. In order to achieve the above object, the related art provides a print control method for saving printing paper by compressing the line pitch of characters or the word pitch of characters. However, this method is limited in the length and width of the available use and does not meet the expected paper saving requirements. In view of the problem that it is difficult to balance paper saving and printing speed in compression printing in the related art, an effective solution has not been proposed yet. SUMMARY OF THE INVENTION A main object of the present invention is to provide a print control method and a printer to solve the problem in the related art that it is difficult to achieve both paper saving and printing speed when performing compression printing. In order to achieve the above object, according to an aspect of the present invention, a print control method is provided. The printing control method includes: Step S1, obtaining a horizontal compression expression according to a lateral compression ratio, acquiring a row microstep number m according to a vertical compression ratio; Step S2, acquiring original lattice data; Step S3, performing a raw point according to a horizontal compression expression Each line of data of the array data is compressed to generate compressed dot matrix data; and in step S4, the motor prints a point of data in the compressed dot matrix data every m microsteps. Further, obtaining the horizontal compression expression according to the lateral compression ratio in step S1 includes: calculating a horizontal compression expression according to the lateral compression ratio, or obtaining a horizontal compression expression according to the horizontal compression ratio table, wherein the table stores the Correspondence between multiple lateral compression ratios and multiple transverse compression expressions. Further, obtaining the lateral compression expression according to the lateral compression ratio operation includes calculating the number of the fixed operation term and the OR operation term in the horizontal compression expression according to the following formula: pi + 2*p ₂ = r

Where _P1 is the number of items of the fixed operation term in the horizontal compression expression, and P2 is the number of items of the OR operation term in the horizontal compression expression, ! ^ represents the amount of data after compression, and r represents the amount of original data. Further, the horizontal compression expression obtained according to the horizontal compression ratio lookup table includes: determining whether the horizontal compression ratio can be found in the table; when the horizontal compression ratio can be found in the table, the horizontal compression ratio corresponding to the horizontal compression ratio obtained by the table lookup is further compressed. The expression is used as a horizontal compression expression; and when the horizontal compression ratio cannot be found in the table, the horizontal compression expression corresponding to the lateral compression ratio of the table is similar to the horizontal compression ratio as the horizontal compression expression corresponding to the lateral compression ratio . Further, step S3 includes: grouping each dot row data of the original dot matrix data by a data length of the horizontal compression expression to obtain a plurality of data groups; and compressing the plurality of data groups according to the horizontal compression expression, Generating multiple compressed data sets; combining multiple compressed data sets to generate one-line compressed data; and combining compressed data of all dot rows to generate compressed dot matrix data. Further, step S3 includes: partitioning each point row data in the original dot matrix data according to a type to obtain a plurality of data regions; and compressing the plurality of data regions according to the horizontal compression expression to generate a plurality of compressed data regions; Multiple compressed data regions are combined to generate compressed data for a single row; and compressed data for all dot rows is combined to generate compressed dot matrix data. In order to achieve the above object, according to another aspect of the present invention, a printer is provided. The printer includes: a first obtaining unit, configured to obtain a horizontal compression expression according to a lateral compression ratio, obtain a row microstep number m according to a vertical compression ratio; a second acquiring unit, obtain original lattice data; and generate a unit, according to horizontal compression expression The method compresses each dot row data of the original dot matrix data to generate compressed dot matrix data; and a printing unit for printing a dot row data in the compressed dot matrix data every m microsteps of the motor. Further, the first obtaining unit is configured to obtain a horizontal compression expression by: calculating a horizontal compression expression according to the lateral compression ratio, or obtaining a horizontal compression expression according to the horizontal compression ratio table, where the table stores Correspondence between multiple lateral compression ratios and multiple transverse compression expressions. Further, the first obtaining unit is further configured to calculate the number of items of the fixed operation item and the OR operation item in the horizontal compression expression according to the following expression: pi + 2*p ₂ = r

Where _P1 is the number of items of the fixed operation term in the horizontal compression expression, and P2 is the number of items of the OR operation term in the horizontal compression expression, ! ^ represents the amount of data after compression, and r represents the amount of original data. Further, the first obtaining unit obtains the horizontal compression expression according to the horizontal compression ratio lookup table, including: determining whether the horizontal compression ratio can be found in the table; and when the horizontal compression ratio can be found in the table, the horizontal compression ratio obtained by the table is obtained. The corresponding horizontal compression expression is used as a horizontal compression expression; and when the horizontal compression ratio cannot be found in the table, the horizontal compression expression corresponding to the lateral compression ratio of the table is similar to the horizontal compression ratio as the horizontal compression ratio Horizontal compression expression. Further, the generating unit is configured to generate compressed dot matrix data according to the following manner: grouping each dot row data of the original dot matrix data by a data length of the horizontal compression expression to obtain a plurality of data groups; Compressing multiple data sets to generate multiple compressed data sets; combining multiple compressed data sets to generate one-line compressed data; and combining compressed data of all dot rows to generate compressed dot matrix data. Further, the generating unit is configured to generate compressed dot matrix data according to the following manner: partitioning each dot row data in the original dot matrix data by type to obtain a plurality of data regions; compressing the plurality of data regions according to the horizontal compression expression , generating a plurality of compressed data areas; combining a plurality of compressed data areas to generate compressed data of one line; and combining compressed data of all point lines to generate compressed dot matrix data. In order to achieve the above object, according to another aspect of the present invention, a printer is provided. The printer comprises: a stepping motor; a printing mechanism; and a controller, respectively connected to the stepping motor and the printing mechanism, configured to obtain a transverse compression expression according to a lateral compression ratio, and obtain a row microstep number m according to a longitudinal compression ratio; Raw dot matrix data; compresses each dot row data of the original dot matrix data according to the horizontal compression expression to generate compressed dot matrix data; and controls the printing mechanism to print a point in the compressed dot matrix data every m microsteps of the stepping motor Row data. With the print control method or printer of the present invention, since the horizontal compression expression and the row microstep number are first acquired, then each dot row data of the original lattice data is compressed according to the transverse compression expression to generate compressed dot matrix data, And controlling the rotation of the motor in a micro-step manner, and printing each dot row data of the compressed dot matrix data in a row mode according to the microstep number, thereby solving the problem that the paper saving and the printing speed are difficult to be achieved in the related art in the compression printing. The problem, in turn, achieves the effect of speed and significant paper saving when performing compression printing. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. 1 is a schematic diagram of a composition of a first embodiment of a printer according to the present invention; FIG. 2 is a flow chart of a printing control method according to a first embodiment of the present invention; FIG. 3 is a first embodiment of the present invention. FIG. 4 is a flow chart of horizontally compressing a little line of data according to a second embodiment of the present invention; FIG. 4 is a flow chart for printing lateral line data according to a second embodiment of the present invention; FIG. FIG. 6 is a schematic diagram of a dot-line data compression process of horizontally compressed dot line data according to a print control method according to a first embodiment of the present invention; FIG. 7 is a print according to a second embodiment of the present invention. A schematic diagram of a dot-line data compression process for horizontally compressing point line data of a control method; and FIG. 8 is a schematic diagram of the composition of a second embodiment of the printer according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. 1 is a schematic diagram of the composition of a first embodiment of a printer according to the present invention. As shown, the printer 30 includes a controller 31, a communication interface 32, a RAM memory 33, a FLASH memory 34, a motor driver 35, a stepper motor 36, and Printing mechanism 37. The controller 31 controls each module to perform work. For example, the controller 31 controls the communication interface 32 to receive print data and a compression ratio setting command sent by a print requesting device (such as a computer or a network device), and the print data may be dot matrix print data. It can print data for characters including text codes and various typesetting instructions, and can also be print data defined by graphic instructions (referred to as graphic print data). The compression ratio setting command is used to set the horizontal compression ratio and vertical direction of the printer. The compression ratio, when the print data is character print data or graphic print data, the controller 31 also converts the character print data and the graphic print data into dot matrix print data, and the controller 31 also controls the printing mechanism 37 to perform data printing on the medium, etc. . The controller 31 includes a data compression unit 311 for compressing the original dot matrix print data in a bit manner according to the horizontal compression expression to generate compressed dot matrix data, which is a dot matrix print sent by the print requesting device to the printer. The data or the dot print data converted into the character print data sent to the printer by the print requesting device. The communication interface 32 receives the print data and the compression ratio setting command sent by the print requesting device, and stores the received print data and the compression ratio setting command in the RAM memory 33. The commonly used communication interface is a USB interface, an Ethernet interface, or the like. . The RAM memory 33 includes a receive buffer 331 for holding print data received by the communication interface 32 and a compression ratio setting instruction, and a print buffer 332 for saving to be printed. The compressed lattice data of the mechanism 37. a FLASH memory (ie, a non-volatile memory) 34, configured to store a font database 341, the font database 341 includes an index data area and a font data area, wherein the index data area includes a data amount of the font data of the character (referred to as a data amount), The font address of the character in the font data area is stored in the font data area (referred to as the address offset). The font data area stores the font data of each character. When the font data of the character is obtained, the character code is first indexed according to the character. The data amount of the font data of the character and its address offset in the font data area are obtained in the data area, and then the font data corresponding to the data amount is read in the font data area according to the address offset. For example, the text code 0x30 corresponds to the character "0", and the data amount and address offset of the character code 0x30 are searched in the index data area, such as the data amount is 6 (bytes) and the address offset is 0x1000, then the font data is A total of 6 bytes of data from the address 0x1000 0x1005 in the area is the font data of the character "0". The FLASH memory 34 is also used to store a correspondence table between the preferred horizontal compression ratio and the preferred horizontal compression expression, such as a horizontal compression ratio of /r and a character font data of a WxH lattice, wherein, ! ^ represents the amount of data after compression, r represents the original amount of data, r is in units of bits, W represents the number of points in the width direction of the font data, and H represents the number of points in the height direction of the font data. When r is a divisor of W, the lateral compression ratio is a preferred lateral compression ratio. If the font data of the character is 12x24 lattice, that is, W=12, then when r is a divisor of 12, such as r=3, 4, 6 Or horizontal compression ratio at 12 o'clock Both are preferred lateral compression ratios, such as lateral compression ratios 2/3, 3/4, 5/6, 7/12, etc. are preferred lateral compression ratios; transverse compression expressions are polynomials, including two kinds of operation items, respectively fixed An operation term and an OR operation term, wherein the fixed operation term indicates that the bit corresponding to the operation term is unchanged, and the OR operation term indicates that the adjacent two-bit data corresponding to the operation item is ORed, such as horizontal The compression expression is 1^+13⁄4|13⁄4, where bi, b ₂ , and b ₃ are bit data arranged in order, then! ^ is a fixed operation item, that is, the first bit data is unchanged, b ₂ | b ₃ is an "or" operation item, and "|" means an "or" operator, that is, the second bit data and the third bit data are "or". The number of data bits in the horizontal compression expression, that is, the number of bits, which is the data length of the horizontal compression expression, usually expressed as L. For example, the horizontal compression expression is 1^+13⁄4|13⁄4, then 1 ^ to 13⁄4 a total of 3 bits of data to perform the operation, that is, the horizontal compression expression data length L = 3, and for example, the horizontal compression expression is bi + + bs + + bslbs, then! ^to b ₆ total 6-bit data is operated, so the data length of the horizontal compression expression is L=6, and the horizontal compression expression corresponding to the preferred lateral compression ratio is a preferred lateral compression expression, such as a preferred lateral compression ratio of 2/ 3, then the transverse compression expression bi+b ₂ |b ₃ corresponding to the preferred lateral compression ratio 2/3 is a preferred lateral compression expression. The motor driver 35 is configured to supply a driving current to the stepping motor 36 to rotate the stepping motor. The driving method of the stepping motor includes a full step mode and a micro step mode, wherein the full step mode is the initial step of the motor according to the initial step The working mode when the rotation is performed, the micro step method is the working mode when the motor rotates according to the microstep length, wherein the initial step length is the motor step length when the longitudinal compression is not performed, and the micro step size is to divide the initial step size equally. The motor step size after n equal parts, that is, the micro step size is l/n of the initial step size. Usually, the motor step angle (abbreviated as the initial step angle) of the initial step is equally divided, such as 2 equal parts. It is further divided into equal parts on the basis of two equal parts. Therefore, n is preferably a multiple of two, that is, a multiple of two squares of the initial step angle. The stepping motor 36 is used for driving the movement of the medium. When the stepping motor works in the micro step mode, the moving distance of the motor is dl for each microstep medium. When the stepping motor works in the full step mode, the motor moves every step of the medium. The distance is d2, then dl=d2/n. The printing mechanism 37 includes a printhead for printing the converted compressed dot matrix data on a medium to generate text and images on the medium. The print head is a line print head, which prints a line of data at a time. The commonly used line print head is a thermal print head, which includes a plurality of heat generating units, and a plurality of heat generating units are arranged equidistantly in a row, a heat generating unit and a dot row data. One point of data (ie, 1 bit) corresponds. When the point data is the first setting data, such as "1", the corresponding heat generating unit generates heat, thereby forming a dot on the printing medium, and the point data is the second setting. When data is used, such as "0", its corresponding heat-generating unit does not heat up, and there is no printout on the print medium. The embodiment of the present invention further provides a print control method. The print control method of the embodiment of the present invention can be executed by the controller 31 in the printer of the embodiment of the present invention, or used to control the printer of the embodiment of the present invention. The printer of the embodiment of the present invention can also be used in the print control method of the embodiment of the present invention. 2 is a flowchart of a printing control method according to an embodiment of the present invention. The specific processing procedure is as follows: Step S1, obtaining a horizontal compression expression according to a lateral compression ratio, and obtaining a microstep number m according to a vertical compression ratio The controller 31 analyzes the compression ratio setting command stored in the reception buffer 331 to obtain a lateral compression ratio! ^ , where , , r are positive integers, and r>>r/2, such as the original print width of 80mm, and the print width after compression is 56 mm, then the lateral compression ratio _ri /r=7/10 (ie 56/80 ). After obtaining the lateral compression ratio iVr, the horizontal compression expression can be obtained by operation, or the horizontal compression expression can be obtained by looking up the table. The process of obtaining the horizontal compression expression by the operation according to the lateral compression ratio iVr is as follows: The number of items of the fixed operation term and the OR operation term in the horizontal compression expression is calculated according to the following Expression 1 and Expression 2. Pi + 2*p ₂ = r (Expression 1) pi + P2 = Γι (Expression 2) By processing the above two equations, we get: pi Z - r; p ₂ = r - _ri . Where _P1 is the number of items of the fixed operation term in the horizontal compression expression, and p ₂ is the number of items of the OR operation term in the horizontal compression expression. If the printing medium used is changed from 80mm width to 56mm width, that is, the printing width is changed from the original printing width 80 to the compressed printing width 56, the lateral compression ratio _ri /r = 7/10 (ie 56/80), It is necessary to compress 10 points in the original data into 7 points in the horizontal direction; according to Expression 1 and Expression 2, ₁ = 4, p ₂ = 3 is calculated, that is, the term of the fixed operation term in the horizontal compression expression The number of items with a number of 4 or "or" is 3, corresponding to the original data bl to bl0, and the horizontal compression expression can be

Where bi, b ₂ , b ₃ , b ₄ are fixed operations, b ₅ |b ₆ , b ₇ |b ₈ , b ₉ |bio are "or"operations; preferably, fixed in the horizontal compression expression When the operation term is separated from the OR operation term and evenly distributed, an optimized horizontal compression expression is obtained, such as! ^+! ^! ^+! ^+! ^! ^+! ^+! ^! ^+! ^. , among them, ! ^, b ₄ , b ₇ , b ₁₍₎ are fixed operations, and b ₂ |b ₃ , b ₅ |b ₆ , b ₈ |b ₉ are OR operations. The process of obtaining the horizontal compression expression by looking up the table according to the lateral compression ratio iVr is as follows: According to the lateral compression ratio / the correspondence table of the preferred lateral compression ratio and the preferred lateral compression expression stored in the FLASH memory 34, the table is looked up, Preferably, the lateral compression ratio "in the column finds a preferred lateral compression expression corresponding to the lateral compression ratio iVr. Table 1 is a table showing the correspondence between the preferred lateral compression ratio and the preferred lateral compression expression when W = 12 (the dot matrix data of the character is 12 X 24), and the lateral compression ratios are 5/6 and 7/10, respectively. Explain the process of checking the table.

Table 1 Find the 5/6 item in the "Preferred Lateral Compression Ratio" column in Table 1, which is located on the third line, and the expression corresponding to the "Preferred Horizontal Compression Expression" column in the third line: bi+ +bs+ +bslbs is the horizontal compression expression to look for. When 7/10 items are found in the "Preferred Lateral Compression Ratio" column in Table 1, if 7/10 items are not found in the "Preferred Lateral Compression Ratio" column, the items close to the value of 7/10 are found. For item 2/3 and item 3/4, any one of them may be selected; preferably, a preferred lateral compression ratio with a smaller value is selected, such as 2/3 is selected, so that a lateral compression ratio of 7/10 can be obtained. The horizontal compression expression is 1^+1) ₂ |13⁄4. The controller 31 parses the compression ratio setting command stored in the receiving buffer 331 to obtain a vertical compression ratio of 3 ₁ /3, where _Sl and s are positive integers, and s> _S1 , for example, the original printing length is 80 mm. The compressed print length is 56 mm, and the longitudinal compression ratio is _Sl / s = 7/10 (ie 56/80). It should be noted that, in order to avoid the offset of the printed text or the image, the lateral compression ratio is usually equal to the vertical compression ratio. According to the longitudinal compression ratio _S1 /s and the number of microsteps n of the initial step size, the number of microsteps m taken by the motor when printing a line of compressed data during longitudinal compression printing is calculated, where m=(n* _S1 )/ _s , such as An initial step step is equally divided into 16 microsteps, and the number of microsteps of the initial step size is n=16. If an initial step step is equally divided into 8 microsteps, the number of microsteps of the initial step size is n=8. . When m is not an integer, since the number of steps of the motor can only be an integer, that is, m cannot be a decimal, the integer processing of m is required to be an integer; preferably, m is the rounded value. The value of the new compression ratio m/n becomes smaller with respect to the longitudinal compression ratio _S1 /s, thereby increasing the longitudinal data compression ratio. Taking ₅₁ /5 as 7/10 and n equal to 8 as an example, how to find the value of m. Since m=C8*7)/10, that is, m is a fraction 5.6, m can be either an integer 5 or an integer 6. Preferably, m is equal to 5, that is, the longitudinal compression ratio is changed from 7/10 of a larger value. The smaller value is 5/8, which increases the longitudinal compression ratio and reduces the length of the medium used, thus reducing the amount of media used. Step S2, the original dot matrix data controller 31 processes the print data stored in the receive buffer 331. When the received print data is dot matrix print data, the received dot matrix print data is the original dot matrix data. When the received print data is character print data, the data amount and the address offset of the font data of the character are queried in the index data area of the font database 341 according to the character code of the character, according to the address offset in the font database. Reading the font data corresponding to the data amount in the font data area of 341, and arranging the corresponding font data of the characters according to the order of receiving the characters to generate original dot matrix print data; when the received print data is graphic print data, Analyze the graphics commands in the graphics print data and get the original dot matrix data in dot matrix mode. Step S3, compressing each dot row data of the original dot matrix data according to the horizontal compression expression, and generating a compressed dot matrix data controller 31 according to the printing order of the original dot matrix data, as shown in FIG. 5, according to the direction 63 From the top to the bottom, the first dot row data 64 of the original dot matrix print data 60 is first compressed to generate first dot row compressed data 84, and then the second dot row data is compressed to generate a second dot row compression. The data is processed in sequence until the i-th (i is equal to 24 in FIG. 5) dot row data is compressed into the i-th row row compressed data, and then the first dot row compressed data, the second dot row compressed data, ..., the 24th are generated. The compressed dot matrix data 80 composed of compressed data is dot-lined, and the generated compressed dot matrix data is stored in the print buffer 332 of the RAM memory 33. For the compression process of each line of data, reference may be made to the detailed description of the flowchart shown in FIG. 3 or FIG. 4 below.

S4, the motor rotates m microsteps, prints a little line of data in the compressed dot matrix data to control the motor rotation in a microstep manner, and the motor prints a little line of compressed data every m microsteps. According to this manner, the first dot row compressed data, the second dot row compressed data, the third dot row compressed data, ... of the compressed dot matrix data are sequentially printed, until the last point of the compressed dot matrix data is printed, and the data is compressed due to The number of microsteps of the initial step of the motor is n, so the print height of each dot row data is m/n when the stepper motor works in full step mode. 3 is a flow chart of laterally compressing a bit of row data according to the printing control method according to the first embodiment of the present invention, and the specific processing procedure is as follows: Step S311: grouping a bit of row data of the original dot matrix data by the original dot matrix data The dot row data is composed, and each row of data is composed of a plurality of dot data, and each point of data corresponds to one bit of data. The point data in the one-line data of the original dot matrix data (referred to as the original dot row data) is grouped according to the data length L of the horizontal compression expression. The point data of the original point row data is grouped by the data length L of the horizontal compression expression, and is divided into N/L data groups, where N is the original point. The number of bits of the row data sequentially generates the first data group, the second data group, ..., the kth data group (k = N/L), as shown in (b) of FIG. 6, for (a in FIG. 6) The original dot row data 95 shown is grouped. Since the horizontal compression expression is 1^+13⁄4|13⁄4, that is, L is equal to 3, a row of original dot row data 95 having a data amount of 12 bits is divided into four. (ie 12/3) data groups, which are the first data group, the second data group, the third data group and the fourth data group, respectively. Step S312, compressing each data group according to the horizontal compression expression, and generating a corresponding compressed data group. As shown in (b) of FIG. 6, the first data group and the second data group are performed according to the horizontal compression expression bi+ lbs. First, the fourth data group is compressed, and respectively generates a first compressed data group, a second compressed data group, ..., a fourth compressed data group as shown in (c) of FIG. 6, as shown in (b) of FIG. The first data group is "110", and is compressed by the horizontal compression expression bi+b ₂ |b ₃ , then the first bit "1" is unchanged, the second bit "1" and the third bit "0" The "perform" or "calculation" yields a one-bit "1", and the first data set "110" is compressed into the first compressed data set "11" as shown in (c) of FIG. Step S313, combining the compressed data groups, generating the point row compressed data according to the grouping order of the original point row data, combining the compressed data groups, and generating the point row compressed data, as shown in FIG. 6(c), A compressed data set, a second compressed data set, ..., a fourth compressed data set are combined to generate dot-line compressed data 96 as shown in (d) of FIG. 6, and thus, 95 of FIG. 6(a) is used. The original dot line data "110110011000" is compressed to the dot line compressed data "11110100" as shown by 96 in Fig. 6(d). 4 is a flow chart of laterally compressing a bit of row data according to a second embodiment of the present invention. The specific processing procedure is as follows: Step S321: Partitioning a row of data in the original dot matrix data according to type, and obtaining a plurality of data regions The point data in the point data of the original dot matrix data is classified according to the data attribute, such as the point data generated by the font data of the character is a character class, the point data generated by the graphic command is a graphic class, ..., The dot data formed by the character interval is an interval class or the like. As shown in FIG. 7(b), the dot data of the original dot row data 67 shown in FIG. 7(a) is divided into two types of data, which are character class data 91, respectively. And interval class data 92. According to the type of the point data, in a determined order, such as from left to right, the adjacent point data in the original point line data is partitioned into a plurality of data areas, wherein each data area can only include one Type of data, each character class data area may include point data generated by dot matrix data of one character, or dot data generated by dot matrix data composed of a plurality of consecutive characters, and similarly, each The graphics class data area can include A graphic dot matrix data may also include dot matrix data composed of a plurality of consecutive graphics. As shown in FIG. 7(c), the original dot row data 67 is divided into eight data regions, which are respectively a first data region, and a first data region. a second data area, ..., an eighth data area, wherein the first data area, the third data area, the fifth data area, and the seventh data area are character classes, the second data area, the fourth data area, and the sixth data area The eighth data area is an interval class. Step S322, compressing each data area according to the horizontal compression expression, and generating a corresponding compressed data area according to the horizontal compression expression, to the first data area, the second data area, ..., shown in FIG. 7(c) The eighth data area is compressed to generate a first compressed data area, a second compressed data area, and an eighth compressed data area as shown in FIG. 7(d), respectively. Step S323, combining the compressed data regions, generating the point row compressed data according to the partition order of the original dot row data, combining the compressed data regions, and generating the dot row compressed data, as shown in FIG. 7(d), for the first compression The data area, the second compressed data area, ..., the eighth compressed data area are combined to generate the dot line compressed data 87 as shown in Fig. 7(e), and thus the original shown in Fig. 7(a) 67 is obtained. The dot row data is compressed into the dot row compressed data shown in 87 of Fig. 7(e). In this embodiment, by classifying the point line data, the mutual interference between different types of data during horizontal compression is reduced, and the integrity of each type of data is maintained, thereby improving the horizontal compression printing effect. The embodiment of the present invention further provides a printer. As shown in FIG. 8, the printer includes a first obtaining unit 301, a second obtaining unit 302, a generating unit 303, and a printing unit 304. The first obtaining unit 301 is configured to obtain a horizontal compression expression according to the lateral compression ratio, and acquire the row microstep number m according to the vertical compression ratio. The first obtaining unit 301 can be implemented by the controller 31 and the communication interface 32 described above. The second acquisition unit 302 acquires the original lattice data. The second obtaining unit 302 can be implemented by the communication interface 32 described above, or by the communication interface 32 that is separately provided, or converted by the controller 31 to the character print data acquired by the printer. The generating unit 303 compresses each dot row data of the original dot matrix data according to the horizontal compression expression to generate compressed dot matrix data. The generating unit 303 can also be implemented by the controller 31 described above. The printing unit 304 is configured to print a little line of data in the compressed dot matrix data every m microsteps of the motor. The printing unit 304 can be realized by the controller 31, the stepping motor 36, and the printing mechanism 37 described above. It should be noted that the print control method of the embodiment of the present invention may be performed by, but not limited to, the printer provided by the embodiment of the present invention. The printer of the embodiment of the present invention may be used to execute the print control method provided by the embodiment of the present invention. . The printer of the embodiment of the present invention can be used in conjunction with the print control method provided by the embodiment of the present invention, and thus can also be used to perform the preferred print control method of the embodiment of the present invention. In this embodiment, the first acquisition unit is no longer used. 301. The second acquisition unit 302, the generation unit 303, and the printing unit 304 perform a more preferable description. The print control method or printer provided by the embodiment of the present invention obtains a horizontal compression expression according to a lateral compression ratio, wherein the horizontal compression expression includes a fixed operation term and an OR operation term, and the row microstep number is obtained according to the vertical compression ratio, and the horizontal direction is used. The compression expression laterally compresses the dot line data and then prints, reducing the width of the character line, thereby reducing the width of the used medium; controlling the paper feeding motor to perform dot line data printing in a microstep manner according to the number of microsteps of the line, thereby Longitudinal compression of print data reduces the length of media used. Since the horizontal compression expression includes a fixed operation item and an "or" operation item, the shape of the text font is preserved by the fixed operation item, the influence of the horizontal compression on the text font is reduced, and the horizontal data is effectively reduced by the "or" operation item. The volume is compressed to realize the horizontal compression of the print data, and the motor movement is controlled in a micro-step manner to realize the longitudinal compression of the print data, and the print data is not required to be compressed in the longitudinal direction, thereby ensuring the print quality of the text and the like in the vertical direction. Therefore, the compressed printing effect of the original print data in the horizontal and vertical directions can be realized by a simple operation. According to the print control method provided by the embodiment of the present invention, since the amount of processing of the compressed data is small, the printing speed of the printer is not affected in the case of ensuring the print quality. Further, the point data in the point row data is partitioned and compressed according to the type of the point data, thereby ensuring the compression consistency of different types of data, eliminating the mutual influence on the continuous compression of different types of point data, and ensuring the text. , image, etc. integrity. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A print control method, comprising:

 Step Sl, obtaining a horizontal compression expression according to the lateral compression ratio, and obtaining a row microstep number m according to the vertical compression ratio;

 Step S2, acquiring original dot matrix data;

 Step S3, compressing each point row data of the original dot matrix data according to the horizontal compression expression to generate compressed dot matrix data;

 Step S4: The motor prints a bit of row data in the compressed dot matrix data every time the motor moves by the m microstep.

The print control method according to claim 1, wherein the obtaining the horizontal compression expression according to the lateral compression ratio in the step S1 comprises:

 Calculating the transverse compression expression according to the lateral compression ratio, or

 The horizontal compression expression is obtained based on the lateral compression ratio look-up table, wherein a correspondence relationship between a plurality of lateral compression ratios and a plurality of lateral compression expressions is stored in the table.

3. The printing control method according to claim 2, wherein when the horizontal compression expression is obtained according to the lateral compression ratio operation, a fixed operation term and "or" in the horizontal compression expression are calculated according to the following formula "Number of items in the operation item:

Pi + 2*p ₂ = r

Wherein _P1 is the number of items of the fixed operation item in the horizontal compression expression, and P2 is the number of items of the OR operation item in the horizontal compression expression, ^ represents the amount of data after compression, and r represents the amount of original data.

4. The printing control method according to claim 2, wherein the obtaining the horizontal compression expression according to the horizontal compression ratio lookup table comprises:

 Determining whether the horizontal compression ratio can be found in the table;

When the horizontal compression ratio can be found in the table, a horizontal compression expression corresponding to the horizontal compression ratio obtained by looking up the table is used as the horizontal compression expression; When the horizontal compression ratio cannot be found in the table, a horizontal compression expression corresponding to a lateral compression ratio similar to the value of the lateral compression ratio in the table is used as a horizontal compression expression corresponding to the horizontal compression ratio. formula.

The printing control method according to claim 1, wherein the step S3 comprises:

 And grouping each dot row data of the original dot matrix data in units of data lengths of the horizontal compression expression to obtain a plurality of data groups;

 And compressing the plurality of data groups according to the horizontal compression expression to generate a plurality of compressed data groups;

 Combining the plurality of compressed data sets to generate compressed data of a little line; and combining the compressed data of all the dot lines to generate the compressed dot matrix data.

The printing control method according to claim 1, wherein the step S3 comprises:

 And arranging each point row data in the original dot matrix data according to a type to obtain a plurality of data regions; and compressing the plurality of data regions according to the horizontal compression expression to generate a plurality of compressed data regions;

 Combining the plurality of compressed data regions to generate compressed data of one line; and combining the compressed data of all the dot lines to generate the compressed dot matrix data.

7. A printer, comprising:

 a first obtaining unit, configured to obtain a horizontal compression expression according to a lateral compression ratio, and obtain a row microstep number m according to a longitudinal compression ratio;

 a second acquiring unit, acquiring original dot matrix data;

 Generating unit, compressing each point row data of the original lattice data according to the horizontal compression expression to generate compressed dot matrix data;

 a printing unit, configured to print a line of data in the compressed dot matrix data every time the motor moves by the m microstep.

The printer according to claim 7, wherein the first obtaining unit is configured to obtain the horizontal compression expression by:

Calculating the transverse compression expression according to the lateral compression ratio, or The horizontal compression expression is obtained according to the horizontal compression ratio lookup table, wherein a correspondence relationship between the plurality of horizontal compression ratios and the plurality of horizontal compression expressions is stored in the table.

The printer according to claim 8, wherein the first acquiring unit is further configured to calculate the horizontal compressed expression according to the following expression when calculating the horizontal compression expression according to the horizontal compression ratio The number of items in the fixed and "or" operands:

Pi + 2*p ₂ = r

Wherein _P1 is the number of items of the fixed operation item in the horizontal compression expression, and P2 is the number of items of the OR operation item in the horizontal compression expression, ^ represents the amount of data after compression, and r represents the amount of original data.

The printer according to claim 8, wherein the first obtaining unit obtains the horizontal compression expression according to the horizontal compression ratio table:

 Determining whether the horizontal compression ratio can be found in the table;

 When the lateral compression ratio can be found in the table, a horizontal compression expression corresponding to the lateral compression ratio obtained by looking up the table is used as the horizontal compression expression;

 When the horizontal compression ratio cannot be found in the table, a horizontal compression expression corresponding to a lateral compression ratio similar to the value of the lateral compression ratio in the table is used as a horizontal compression expression corresponding to the horizontal compression ratio. formula.

The printer according to claim 7, wherein the generating unit is configured to generate the compressed dot matrix data in the following manner:

 And grouping each dot row data of the original dot matrix data in units of data lengths of the horizontal compression expression to obtain a plurality of data groups;

 And compressing the plurality of data groups according to the horizontal compression expression to generate a corresponding compressed data group;

 Combining the plurality of compressed data sets to generate compressed data of a little line; and combining the compressed data of all the dot lines to generate the compressed dot matrix data.

The printer according to claim 7, wherein the generating unit is configured to generate the compressed dot matrix data in the following manner:

Each row of data in the original dot matrix data is partitioned by type to obtain a plurality of data regions; And compressing the plurality of data regions according to the horizontal compression expression to generate a plurality of compressed data regions;

 Combining the plurality of compressed data regions to generate compressed data of a little line; and compressing the compressed data of all the dot lines to generate the compressed dot matrix data.

13. A printer, comprising:

 Stepper motor (36);

 Printing mechanism (37);

a controller (31) is respectively connected to the stepping motor (36) and the printing mechanism (37) for acquiring a transverse compression expression according to a lateral compression ratio, and obtaining a row microstep number m according to a longitudinal compression ratio _; Acquiring original dot matrix data; compressing each dot row data of the original dot matrix data according to the horizontal compression expression to generate compressed dot matrix data; and controlling the stepper motor (36) every m microsteps The printing mechanism (37) prints a point of line data in the compressed dot matrix data.

14. The printer according to claim 13, wherein the controller (31) is configured to acquire the horizontal compression expression in the following manner:

 Calculating the transverse compression expression according to the lateral compression ratio, or

 The horizontal compression expression is obtained based on the lateral compression ratio look-up table, wherein a correspondence relationship between a plurality of lateral compression ratios and a plurality of lateral compression expressions is stored in the table.

The printer according to claim 14, wherein the controller (31) is configured to calculate the horizontal compression expression according to the following formula when the transverse compression expression is obtained according to the lateral compression ratio operation The number of items in the fixed and "or" operands:

Pi + 2*p ₂ = r

Wherein _P1 is the number of items of the fixed operation item in the horizontal compression expression, and P2 is the number of items of the OR operation item in the horizontal compression expression, ^ represents the amount of data after compression, and r represents the amount of original data.

16. The printer according to claim 14, wherein the controller (31) is configured to obtain the horizontal compression expression according to the transverse compression ratio look-up table in the following manner:

Determining whether the horizontal compression ratio can be found in the table; When the horizontal compression ratio can be found in the table, a horizontal compression expression corresponding to the horizontal compression ratio obtained by looking up the table is used as the horizontal compression expression;

 When the horizontal compression ratio cannot be found in the table, a horizontal compression expression corresponding to a lateral compression ratio similar to the value of the lateral compression ratio in the table is used as a horizontal compression expression corresponding to the horizontal compression ratio. formula.

17. The printer according to claim 13, wherein the controller (31) is configured to generate the compressed dot matrix data in the following manner:

 And grouping each dot row data of the original dot matrix data in units of data lengths of the horizontal compression expression to obtain a plurality of data groups;

 And compressing the plurality of data groups according to the horizontal compression expression to generate a plurality of compressed data groups;

 Combining the plurality of compressed data sets to generate compressed data of a little line; and combining the compressed data of all the dot lines to generate the compressed dot matrix data.

18. The printer according to claim 13, wherein the controller (31) is configured to generate the compressed dot matrix data in the following manner:

 And arranging each point row data in the original dot matrix data according to a type to obtain a plurality of data regions; and compressing the plurality of data regions according to the horizontal compression expression to generate a plurality of compressed data regions;

 Combining the plurality of compressed data regions to generate compressed data of one line; and combining the compressed data of all the dot lines to generate the compressed dot matrix data.