JP2003019788A - Ink jet printing system to be mounted in vehicle and printing method for ink jet printer mounted in vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet printing system mounted in a vehicle such as an automobile, a ship or the like and to obtain a good print even when an acceleration of a vehicle is changed in a method for controlling an ink jet printer. SOLUTION: The ink jet printing system 1 is mounted in the vehicle 91. The printing system 1 comprises an acceleration detecting means 11 for detecting the acceleration A of the vehicle 91. When the acceleration A exceeds a predetermined threshold value K01, its printing is stopped. When the acceleration A becomes smaller than a threshold value K02, printing is continued from data of a head line of a page in which the printing is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted ink jet printing system and a method for controlling a vehicle-mounted ink jet printer which can perform good printing even when the acceleration of a vehicle such as a vehicle or a ship changes.

[0002]

2. Description of the Related Art In recent years, a car navigation system terminal device and an internet terminal device have been installed in a vehicle, and a driver, a passenger or the like desires to print a color image displayed on a display. There are many cases.

[0003]

By the way, typical color printers include an inkjet printer, a laser beam printer, and a thermal sublimation printer.

Although a laser beam color printer can use plain paper as a print medium, it is not suitable for the above-mentioned applications because it is expensive and the mechanism part is huge. Further, the thermal sublimation color printer can be made relatively small, but it is a coloring medium (color film cartridge) or a dedicated print medium (print paper).
Is expensive.

On the other hand, the ink jet printer can be made relatively small and can use plain paper. However, the inkjet printer has a structure in which an ink droplet is ejected from a nozzle and the ink droplet is deposited on the surface of a print medium. For this reason, when mounted on a vehicle, if the acceleration changes, the ink drop is affected by the change in the acceleration in the gap between the print paper and the landing position differs from the original position, and printing is performed. There is a problem that the image becomes unclear.

For these reasons, it was considered unrealistic to mount an ink jet printer on a vehicle and print while driving.

An object of the vehicle-mounted inkjet printing system of the present invention is to provide a vehicle-mounted inkjet printing system and a vehicle-mounted inkjet printer that can perform good printing even when the vehicle is running. It is to provide a control method.

[0008]

A vehicle-mounted inkjet printing system (hereinafter simply referred to as "inkjet printing system") according to the first aspect of the present invention is mounted on a vehicle such as a vehicle, a ship, and an airplane. It is characterized in that it has an acceleration detecting means for detecting the acceleration of the vehicle, and stops the printing when the acceleration or the amount of change in acceleration detected by the acceleration detecting means exceeds a predetermined threshold value.

The acceleration detecting means can detect the acceleration of the vehicle by inputting the output signal of the speed detecting means provided in the vehicle. When the acceleration detecting means is originally mounted on the vehicle, the acceleration detecting means constitutes a part of the inkjet printing system. The speed detecting means may detect only the longitudinal acceleration of the vehicle or may further detect centrifugal force generated when the vehicle is traveling in a curve. In the first aspect (the same applies to each of the aspects described below), it goes without saying that printing is not stopped if the amount of change in acceleration or high speed does not exceed a predetermined threshold value within a predetermined period. .

In the ink jet printing system of the present invention, when printing is stopped, the paper is discharged, and thereafter,
When the acceleration or the amount of change in acceleration detected by the acceleration detecting means becomes smaller than a predetermined threshold value, new print paper is fed, and the page for which printing has been stopped is printed from the data of the first line. When the acceleration or the amount of change in acceleration detected by the acceleration detecting unit becomes smaller than a predetermined threshold value after continuing or feeding a new print sheet, the top data (( It is characterized by restarting printing from image data and binary data).

In addition to cut sheets,
Roll paper is also used. When the print paper is roll paper, the discharge may include a roll paper cutting step by an automatic cutting device. In the case of a system that does not include an automatic roll paper cutting device, the paper is discharged by a predetermined length of roll paper.

In the first aspect of the present invention, the carriage shaft can be mounted on the vehicle so that the carriage axis faces the front and rear of the vehicle, and the predetermined threshold value of the acceleration or the acceleration change amount at the time of restarting printing is It may be the same as the predetermined threshold value when printing is stopped, or may be different.

The ink jet printing system according to the second aspect of the present invention has an acceleration detecting means for detecting the acceleration of the vehicle, and when the acceleration or the amount of change in acceleration detected by the acceleration detecting means exceeds a predetermined threshold value. When the printing is temporarily stopped and the acceleration or the amount of change in acceleration becomes smaller than a predetermined threshold value, the printing is restarted from the data next to the last printed data when the printing is temporarily stopped. . The second aspect of the present invention
Also in the aspect, similarly to the first aspect, the acceleration detecting means is
The acceleration of the vehicle can also be detected by inputting the output signal of the speed detecting means provided in the vehicle. When the acceleration detecting means is originally installed in the vehicle, the acceleration detecting means is an inkjet printer. It forms part of the printing system.

In the second aspect, the printing is stopped during the forward movement or the backward movement of the carriage, or depending on the timing of the print stop, after the carriage forward movement is completed and before the backward movement is started. That is, the printing is stopped in the middle of a certain line, or immediately before the start (or immediately after the end) of the line depending on the timing of the print stop.

In an inkjet printer, the data sent to the printhead is temporarily stored in an image buffer. The image buffer has a storage area for a plurality of lines. However, if the printing is stopped, the data of the first line of the plurality of lines may be erased.

In such a case, the image buffer is provided with a storage area for backup, and when printing is restarted, the data in this backup storage area is copied to the original storage area. Can be used. When the printing is stopped, the address of the line data when the printing is stopped can be recorded in the register, and when the printing is restarted, the printing can be performed from the address next to the address.

Also in the second aspect of the present invention, the carriage shaft can be mounted on the vehicle so that the carriage axis faces the front and rear of the vehicle, and the predetermined threshold value of the acceleration or the acceleration change amount when printing is restarted is: It may be the same as the predetermined threshold value when printing is stopped, or may be different.

The ink jet printing system according to the third aspect of the present invention has an acceleration detecting means for detecting the acceleration of the vehicle and an acceleration predicting means for predicting the acceleration, and the predicted value of the acceleration predicted by the acceleration predicting means or When it is determined that the change amount of the predicted value exceeds the predetermined threshold value within the predetermined period, the printing is temporarily stopped, and thereafter, the predicted value of the acceleration or the change amount of the predicted value is within the predetermined period. When it is determined that the value becomes smaller than the predetermined threshold value, the printing is restarted. In the third aspect of the present invention, as in the first and second aspects, the acceleration detecting means can also predict the acceleration of the vehicle by inputting the output signal of the speed detecting means provided in the vehicle. Further, when the acceleration detecting means is originally mounted on the vehicle, the acceleration detecting means constitutes a part of the inkjet printing system.

Further, in the third aspect, the acceleration predicting means is
The acceleration prediction value is used as an independent variable, and a multidimensional map in which at least one of the vehicle speed and the drive source rotational speed is used as a dependent variable is provided, and the acceleration of the vehicle can be predicted based on the multidimensional map.

In the third mode, the printing can be temporarily stopped when the printing of the line currently being printed is completed, and the printing can be restarted from the line next to the line where the printing is completed. The predetermined period when the printing is temporarily stopped is the next forward movement period or the backward movement period of the carriage or the next reciprocating movement period of the carriage, and the predetermined period when the printing is restarted (estimated period)
Is a carriage forward or backward movement period or a reciprocating period from the time when printing is restarted.

Also in the third aspect of the present invention, the carriage shaft can be mounted on the vehicle so that the carriage axis faces the front and rear of the vehicle, and the predetermined threshold value of the acceleration or the acceleration change amount when printing is restarted is: It may be the same as the predetermined threshold value when printing is stopped, or may be different.

The ink jet printer control method according to the fourth aspect of the present invention is characterized in that the acceleration of the vehicle is detected and printing is stopped when the acceleration detection value exceeds a predetermined threshold value.

In the fourth aspect, when printing is stopped, the paper is discharged (in the case of roll paper, the cutting step may be included as described above), and thereafter, the acceleration or the acceleration change amount of the vehicle is changed. When the value becomes smaller than the specified threshold value, new print paper is fed, and for the page for which the printing was stopped, printing is continued from the data of the first line, or new print paper is fed. Then, when the acceleration or the amount of change in acceleration of the vehicle becomes smaller than a predetermined threshold value, the printing can be restarted from the top data of the page where the printing was stopped.

In the fourth aspect of the present invention, the predetermined threshold value of the acceleration or the acceleration change amount when printing is restarted is
It may be the same as the predetermined threshold value when printing is stopped, or may be different.

In the control method for an inkjet printer according to the fifth aspect of the present invention, when the vehicle acceleration or the acceleration change amount exceeds a predetermined threshold value, the printing is temporarily stopped, and the acceleration or the acceleration change amount is set to a predetermined value. When it becomes smaller than the threshold value, the printing is resumed from the data next to the data printed last when the printing is temporarily stopped.

In the fifth aspect of the present invention, the predetermined threshold value of the acceleration or the acceleration change amount when printing is restarted is
It may be the same as the predetermined threshold value when printing is stopped, or may be different.

According to a sixth aspect of the present invention, an inkjet printer control method predicts a vehicle acceleration, and the predicted value of the predicted acceleration or the amount of change in the predicted value has a predetermined threshold value within a predetermined period. When it is determined that the value exceeds the limit, the printing is temporarily stopped, and thereafter, when the predicted value of the acceleration or the amount of change in the predicted value becomes smaller than a predetermined threshold value within a predetermined period, the printing is restarted. And Needless to say, if it is determined that the predicted value of the acceleration or the amount of change in the predicted value does not exceed the predetermined threshold value within the predetermined period, the printing is not stopped.

In a sixth aspect of the present invention, the acceleration prediction value is used as an independent variable, and a multidimensional map in which at least one of vehicle speed and drive source speed is used as a dependent variable is provided. Vehicle acceleration can be predicted.

Further, the printing is temporarily stopped when the printing of the line currently being printed is completed,
The printing can be restarted from the line next to the line where printing has been completed.

Further, in the sixth aspect, the predetermined period when the printing is temporarily stopped is the next forward movement period or the backward movement period of the carriage or the next reciprocating movement period of the carriage, and when the printing is restarted. The predetermined period may be a forward movement period or a backward movement period of the carriage or a reciprocation period from the time when printing is restarted.

In the sixth aspect of the present invention, the predetermined threshold value of the acceleration or the amount of change in acceleration when printing is restarted may be the same as the predetermined threshold value when printing is stopped. It can be different.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] FIG.
FIG. 1 is an explanatory diagram showing a state in which the print system 1 according to the first embodiment is installed in FIG. 2 (A) and (B),
The center console 911 part of the vehicle 91 is shown. The center console 911 incorporates the computer system-integrated print system 1, a car navigation terminal unit 912, a display unit 913, and the like. 2 (A), (B)
Then, in the print system 1, the carriage axis is the vehicle 91.
It is provided to face the front and back of the. In addition, in FIG.
Reference numeral 914 indicates the speed detecting means of the vehicle 91.

FIG. 3 is a functional block diagram of the print system 1.

The print system 1 comprises a computer unit 11 and a printer unit 12. The printer unit 12 includes a print control unit 121, a storage unit 122, a print sheet conveying unit 123, a carriage driving unit 124, a print head driving unit 125, and
It includes a carriage 126 and a printhead 127.

The print control means 121 integrally controls each of the print sheet conveying means 123, the carriage driving means 124, and the print head driving means 125 so that they operate in cooperation with each other.

Further, the print control means 121 uses the I / O
The computer unit 11 can be accessed through the port 128, and the storage unit 12 for storing the data transferred from the computer unit 11 will be described below.
2 can be stored, the data stored in the storage unit 122 can be read, or the data can be transferred to each unit.

The storage device 122 includes a ROM 1221 and an R
The ROM 1221 stores programs such as a printer driver.

The RAM 1222 also stores print job data transferred from the computer unit 11.

The print sheet conveying means 123 feeds the print sheet and conveys it at a predetermined pitch during printing.

The carriage driving means 124 includes a carriage driving circuit 1241, a carriage motor 1242, and a carriage shaft 1243, and the print head 1
The carriage 126 on which the 27 is mounted is attached to the carriage shaft 12.
Reciprocate along 43.

The print head driving means 125 includes a print image buffer 1251, a head data generating means 1252, and a timing generating section 1253. The image data stored in the print image buffer 1251 is sent to the head data generating means 1252 without a predetermined number of bits. Head data generation means 1252
Then, the received bit data is transferred to the print head 127.
Send to.

The print head 127 drives the predetermined nozzles at the timing generated by the timing generation unit 1253 based on the raster-row converted data.

In the first embodiment, the computer unit 11 contains the acceleration detecting means 111 and the acceleration monitoring means 112. The acceleration detecting means 111 acquires the detection result from the speed detecting means 914 provided in the vehicle 91. The detection result (speed signal) of the speed detection unit 914 is converted into the acceleration signal A by the acceleration detection unit 111.

As shown in FIG. 4A, the speed detecting means 9
When the detection result of 14 is output as the analog speed signal v, the acceleration detecting means 111 is the analog differentiating means 1
111 and A / D conversion means 1112. The analog differentiating means 1111 can convert the analog speed signal v into the analog acceleration signal a, and the A / D converting means 1112 can convert the acceleration signal a into the digital acceleration signal A.

Further, as shown in FIG. 4 (B), when the detection result of the speed detecting means 914 is output as the digital speed signal V, the acceleration detecting means 111 determines the speed signal V.
It is possible to output the acceleration signal A by digitally differentiating.

The operation of this embodiment will be described below with reference to the flowchart of FIG.

The acceleration monitoring means 112 monitors whether or not the absolute value of the acceleration signal A exceeds the threshold value K01 (step S1110), and when the absolute value of the acceleration signal A exceeds the threshold value K01. Print control means 121
Then, a print cancel instruction is output (step S112).
0).

In response to this, the print control means 121 outputs an operation stop command (command for returning the carriage 126 to the home position) to the print head drive means 125 (step S1130), and at the same time, an operation stop command to the carriage drive means 124. Is output (step S114
0), and further outputs a paper discharge command to the print paper transport unit 123 (step S1150).

In the acceleration monitoring means 112, the absolute value of the acceleration signal A is the threshold value K02 (here, K02 = K01).
It is monitored whether or not it becomes smaller (step S1160), and when it becomes smaller, the print control means 1
A print restart command is output to the printer 21 (step S117).
0).

Upon receiving a print restart command, the print control unit 121 outputs a paper feed command to the print paper transport unit 123 (step S1180) and RAM.
The print job data (image data) stored in 1222 is sequentially transferred to the print image buffer 1251 (step S1190), and the operation command is output to the print head driving means 125 and the carriage driving means 124 (step S1200). As a result, the page whose printing has been stopped is reprinted (step S12).
10), and printing is performed for the subsequent pages (step S1220).

When the vehicle 91 starts or stops, and the acceleration increases (that is, the absolute value of the acceleration signal A increases), the horizontal component of the force applied to the ink droplets ejected from the nozzles also increases, and the ink The position where the droplets land is displaced from the original target. This can result in blurred printed images.

In the first embodiment, when the absolute value of the acceleration signal A exceeds a certain value (threshold value K01), the print control means 121 suspends printing, and the absolute value of the acceleration signal A exists. When the value becomes smaller than the value (threshold value K02), printing is restarted including the page for which printing was stopped.

[Second Embodiment] A printing system 2 according to a second embodiment is a vehicle 9 as shown by the reference numerals in parentheses in FIG.
It is installed in 2. Center console 9 of vehicle 92
The configuration of 21 is the same as the configuration of the center console 911 of the vehicle 91 already described in the first embodiment. That is, as shown by the reference numerals in parentheses in FIGS. 2A and 2B, the print system 2 is built in, the car navigation terminal unit 922, and the display unit 92.
3 etc. are installed. In FIG. 1, reference numeral 924 indicates the speed detecting means of the vehicle 92.

FIG. 6 is a functional block diagram of the print system 2.

The print system 2 comprises a computer unit 21 and a printer unit 22. The printer unit 22 is the same as the printer unit 12 shown in the block diagram of FIG. That is, in the second embodiment, the printer unit 22 includes the print control unit 221.
Storage means 222 and print paper transport means 223
A carriage driving means 224, a print head driving means 225, a carriage 226, and a print head 2.
Contains 27.

The print control means 221 integrally controls each of the print sheet conveying means 223, the carriage driving means 224, and the print head driving means 225 so that they operate in cooperation with each other.

Further, the print control means 221 uses the I / O
The computer unit 21 can be accessed through the port 228, and means 22 for storing the data transferred from the computer unit 21 will be described below.
2 can be stored, the data stored in the storage unit 222 can be read, or the data can be transferred to each unit.

The storage device 222 includes a ROM 2221 and R
The ROM 2221 stores programs such as a printer driver.

The RAM 2222 also stores print job data transferred from the computer unit 21.

The print sheet conveying means 223 feeds the print sheet and conveys it at a predetermined pitch during printing.

The carriage driving means 224 includes a carriage driving circuit 2241, a carriage motor 2242 and a carriage shaft 2243, and the print head 2
The carriage 126 on which the 27 is mounted is attached to the carriage shaft 22.
Reciprocate along 43.

The print head driving means 225 includes a print image buffer 2251, a head data generating means 2252, and a timing generating section 2253.

In the print image buffer 2251,
As shown in detail in FIG. 7, line data 1 to 2 are provided with storage areas 2251_1 to 2251_4 and a storage area 2251_b for backing up the line data. Here, the line data items 1 to 3 are sequentially output to the print head 227. As will be described later, when printing is resumed after being stopped, the line data in the backup storage area 2251_b is copied to the original storage area storage area 2251_4.

The image data stored in the print image buffer 2251 is stored in the head data generating means 225.
2 is transmitted without a predetermined number of bits. The head data generation unit 2252 sends the received bit data to the print head 227.

The print head 227 drives a predetermined nozzle at the timing generated by the timing generation unit 2253 based on the raster-row converted data.

In the second embodiment, the computer unit 21 contains the acceleration detecting means 211 and the acceleration monitoring means 212. The acceleration detection means 211 acquires the detection result from the speed detection means 924 provided in the vehicle 92. The detection result (speed signal) of the speed detection unit 924 is converted into the acceleration signal A by the acceleration detection unit 211.

The detection result (speed signal) of the speed detecting means 924 is converted into the acceleration signal A by the acceleration detecting means 211. That is, as indicated by the reference numerals in parentheses in FIGS. 4A and 4B, when the detection result of the speed detecting means 924 is output as the analog speed signal v, the acceleration detecting means 211 is connected to the analog differentiating means 2111. , A / D conversion means 2112, and analog differentiation means 211
1 is an analog speed signal v to an analog acceleration signal a
Then, the A / D conversion means 2112 can convert the acceleration signal a into a digital acceleration signal A.

The operation of this embodiment will be described below with reference to the flowchart of FIG.

The acceleration monitoring means 212 monitors whether or not the absolute value of the acceleration signal A exceeds the threshold value K03 (step S2110), and when the absolute value of the acceleration signal A exceeds the threshold value K03. Print control means 221
Then, a print cancel instruction is output (step S212).
0).

In response to this, the print control means 221 outputs an operation stop command (command for returning the carriage 226 to the home position) to the print head drive means 225 (step S2130), and at the same time, the line data when the print is stopped. The address of 2251_1 is stored in a predetermined register.

The print controller 221 outputs an operation stop command to the carriage driver 224 (step S21).
40), and outputs a paper discharge command to the print paper transporting means 223 (step S2150).

In the acceleration monitoring means 212, the absolute value of the acceleration signal A is a threshold value K04 (here, K04 = K03).
It is monitored whether it has become smaller (step S2
160), and when it does not exceed the limit, print control means 22
A print restart command is output to the first printer (step S217).
0).

Upon receipt of the print restart command, the print control unit 221 outputs a paper feed command to the print paper transport unit 223 (step S2180). Also,
The print control unit 221 uses the backup area 2251_.
The backup line data b stored in b is copied to the original storage area 2251_1 and the address at which printing is stopped is called from the register (step S
2190). Further, the print control unit 221 includes a print head driving unit 225 and a carriage driving unit 224.
The operation command is output to (step S2200). As a result, printing is performed from the data of the address next to the address of the storage area 2251_1 for which printing has been stopped (step S2210), and printing is also performed for subsequent pages (step S2220).

When the acceleration of the vehicle 92 changes significantly when the vehicle 92 starts or stops (that is, when the absolute value of the acceleration signal A increases), the horizontal component of the force applied to the ink droplets ejected from the nozzles also changes greatly. , The position where the ink drops land is displaced from the original target. This can cause the printed image to be blurred.

In the second embodiment, when the absolute value of the acceleration signal A exceeds a certain value (threshold value K03), the print control means 221 suspends printing, and the absolute value of the acceleration signal A exists. When the value becomes smaller than the value (threshold value K04), the printing is resumed from the stop position of the line where the print is stopped, so that the printed image is not blurred.

[Third Embodiment] FIG. 9 is an explanatory diagram showing how the print system 3 of the third embodiment is mounted on a vehicle 93. The configuration of the center console 931 of the vehicle 93 is similar to that of the center console 91 of the vehicles 91 and 92 described in the first and second embodiments.
The configuration is the same as that of Nos. 1 and 921. That is, FIG.
As shown in parentheses in (A) and (B), the print system 3 is built in, and a car navigation terminal unit 932, a display unit 933, etc. are mounted. In FIG. 9, the speed detecting means of the vehicle 93 is indicated by reference numeral 934, and the drive source rotational speed detecting means is indicated by reference numeral 9.
35 respectively.

FIG. 10 is a functional block diagram of the print system 3.

The print system 3 comprises a computer unit 31 and a printer unit 32. The printer unit 32 is the same as the printer unit 12 shown in the block diagram of FIG. 3 and the printer unit 22 shown in the block diagram of FIG. That is, in the third embodiment, the printer unit 32 includes the print control unit 321, the storage unit 322, the print sheet conveying unit 323, the carriage driving unit 324, and the print head driving unit 32.
5, a carriage 326, and a print head 327.

The print control means 321 integrally controls the print sheet conveying means 323, the carriage driving means 324, and the print head driving means 325 so that they operate in cooperation with each other.

Further, the print control means 321 uses the I / O
The computer unit 31 can be accessed through the port 328, and the storage means 32 for the data transferred from the computer unit 31 will be described below.
2 can be stored, the data stored in the storage unit 322 can be read, or the data can be transferred to each unit.

The storage device 322 is the ROM 3221.
And a RAM 3222. The carriage driving unit 324 includes a carriage driving circuit 3241, a carriage motor 3242, and a carriage shaft 3243. The print head driving unit 325 includes a print image buffer 3251 and a head data generating unit 32.
52 and a timing generation unit 3253. The print control unit 321 can access the computer unit 31 via the I / O port 328.

In the third embodiment, the computer unit 31 contains an acceleration detecting means 311 and an acceleration monitoring means 312, and an acceleration predicting means 313. The acceleration detecting means 311 is provided in the vehicle 93,
The detection result is acquired from the speed detection means 934.

The detection result (speed signal) of the speed detecting means 934 is converted into the acceleration signal A by the acceleration detecting means 311. That is, when the detection result of the speed detecting means 934 is output as the analog speed signal v, the acceleration detecting means 311 is connected to the analog differentiating means 3111 as shown by the reference numerals in parentheses in FIGS. 4 (A) and 4 (B). , A / D conversion means 3112, and analog differentiation means 311
1 is an analog speed signal v to an analog acceleration signal a
Then, the A / D conversion means 3112 can convert the acceleration signal a into a digital acceleration signal A.

As shown in FIG. 11, the acceleration predicting means 31
Reference numeral 3 denotes a speed signal (here, a digital speed signal V) from the speed detection means 934, an acceleration signal (here, a digital acceleration speed signal A) from the acceleration detection means 311, and a rotation speed from the drive source rotation speed detection means 935. A signal (here, a digital rotation speed signal R) is input.

The acceleration predicting means 313 supplies the velocity signal V
, A multidimensional map (here, a four-dimensional map) M in which the acceleration velocity signal A and the rotation speed signal R are used as dependent variables and the predicted acceleration value AP is used as an independent variable is stored.

The third embodiment of the present invention will be described below with reference to the flowchart of FIG.

The acceleration predicting means 313 uses the four-dimensional map M.
With reference to, it is monitored whether or not the predicted acceleration value AP (absolute value) exceeds the threshold value K05 during the next reciprocating period of the carriage (step S3110). When it is determined that the value of the predicted acceleration value AP exceeds the threshold value K05 during the next reciprocating movement of the carriage, the print control unit 3 is provided.
A print cancel command is output to 21 (step S31).
20).

In response to this, the print control means 321 issues an instruction to the print head driving means 325 to stop the operation after printing the line currently being printed (a command to return the carriage 326 to the home position). In addition to the output (step S3130), the carriage drive unit 324 outputs an instruction to stop the operation after the line currently being printed is printed (step S3140). At this time,
The print control unit 321 stores the address of the image data to be transferred from the RAM 3222 to the print image buffer 3251 in a predetermined register (step S3150).

The acceleration predicting means 313 uses the four-dimensional map M.
With reference to, it is determined whether the predicted acceleration value AP is smaller than the threshold value K06 (here, K06 = K05) during one stroke (step S3160).
When it is determined that the size becomes smaller, the print control unit 321
A print restart command is sent to the printer (step S3170).

The print control means 321 thereafter accesses the address stored in the register (address of the RAM 3222) and transfers the print image data after the line not printed to the print image buffer 3251 (step S3180). ). Also,
The print control unit 321 uses the carriage driving unit 324.
An operation command to the computer (step S3190). After that, continuous printing is performed (step S3200).

When the vehicle 93 starts or stops and the acceleration changes greatly (that is, the absolute value of the acceleration signal A increases), the horizontal component of the force applied to the ink droplets ejected from the nozzle also changes greatly. , The position where the ink drops land is displaced from the original target. This can result in blurred printed images.

In the third embodiment, when the absolute value of the acceleration signal A exceeds a certain value (threshold value K05), the print control means 311 prints the line currently being printed and then suspends printing. Acceleration signal K
When the absolute value of is smaller than a certain value (threshold value K06), printing is restarted from the next line, so that good print output can be obtained even when the acceleration is large.

[0093]

According to the present invention, even when the acceleration of a vehicle such as a vehicle or a ship changes, the change in the acceleration is monitored (because the value of the acceleration is monitored), so that good printing can be performed. .

[Brief description of drawings]

FIG. 1 is a schematic view showing a first embodiment of the present invention,
FIG. 6 is an explanatory diagram showing a state in which a print system is mounted on a vehicle so that a carriage shaft faces the front and rear of the vehicle.

FIG. 2 is an explanatory diagram of a console of a vehicle equipped with a printer according to the first to third embodiments, (A) is a front explanatory diagram, and (B) is a side explanatory diagram.

FIG. 3 is a functional block diagram of the print system according to the first embodiment.

FIG. 4A is a diagram showing an example of acceleration detecting means in the first embodiment, and FIG. 4B is a diagram showing an example of acceleration detecting means in the same manner.

FIG. 5 is a flowchart showing the operation of the first embodiment.

FIG. 6 is a functional block diagram of a print system according to a second embodiment.

FIG. 7 is a diagram showing the print image buffer of FIG. 2 in detail.

FIG. 8 is a flowchart showing the operation of the second embodiment.

FIG. 9 is a schematic view showing a third embodiment of the present invention,
FIG. 6 is an explanatory diagram showing a state in which a print system is mounted on a vehicle so that a carriage shaft faces the front and rear of the vehicle.

FIG. 10 is a functional block diagram of a print system according to a third embodiment.

FIG. 11 is a functional block diagram when the acceleration predicting means inputs a speed signal from the speed detecting means, an acceleration signal from the acceleration detecting means, and a rotation speed signal from the driving source rotation speed detecting means in the third embodiment. is there.

FIG. 12 is a flowchart showing the operation of the third embodiment.

[Explanation of symbols]

1, 2, 3 Print system 11, 21, 31 Computer unit 12, 22, 32 Printer unit 91, 92, 93 Vehicle 111, 211, 311 Acceleration detection means 121, 212, 312 Acceleration monitoring means 112, 221, 321 Print control Means 122, 222, 322 Storage means 123, 223, 323 Print paper transport means 124, 224, 324 Carriage drive means 224, 225, 325 Print head drive means 126, 226, 326 Carriage 127, 227, 327 Print heads 128, 228 , 328 I / O port 313 Acceleration predicting means 911, 921, 931 Center console 912, 922, 932 Car navigation terminal unit 913, 923, 933 Display unit 914, 924, 9 4 speed detecting means 935 drive source rotational speed detecting means 1111, 2111, 3111 analog differentiating means 1112, 2112, 3112 A / D converting means 1222, 2222, 3222 RAM 1241, 241, 3241 carriage driving circuits 1242, 2242, 3242 carriage motor 1243, 2243, 3243 Carriage shafts 1251, 251, 3251 Print image buffers 1252, 2252, 3252 Head data generation section 1253, 2253, 3253 Timing generation section 2251_1, 2521_2, 2251_3, 2251
_4, 2251_b line data

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshimasa Tamura             Seiko, 3-3-3 Yamato, Suwa City, Nagano Prefecture             -In Epson Corporation F-term (reference) 2C056 EA07 EB03 EB35 EC67 FA10

Claims (21)

[Claims] 1. An inkjet printing system mounted on a vehicle, comprising acceleration detection means (which may be external to the printer) for detecting acceleration of the vehicle, and the acceleration detected by the acceleration detection means or An inkjet printing system for mounting on a vehicle, wherein printing is stopped when the amount of change in acceleration exceeds a predetermined threshold value. 2. When the printing is stopped, the paper is discharged,
Thereafter, when the acceleration or the amount of change in acceleration detected by the acceleration detecting unit becomes smaller than a predetermined threshold value, a new print sheet is fed, and the page of the top line of the page for which the printing is stopped is stopped. Printing is stopped when the acceleration or the amount of change in acceleration detected by the acceleration detecting means becomes smaller than a predetermined threshold value, by continuing printing from data or feeding a new print sheet. The vehicle-mounted inkjet printing system according to claim 1, wherein printing is restarted from the top data of the page. 3. The vehicle-mounted inkjet printing system according to claim 1, wherein the carriage shaft is mounted on the vehicle such that the carriage shaft faces the front and rear of the vehicle. 4. The vehicle-mounted inkjet printing system according to claim 1, wherein the vehicle is a vehicle. 5. An inkjet printing system mounted on a vehicle, comprising acceleration detection means for detecting acceleration of the vehicle, wherein the acceleration or the amount of change in acceleration detected by the acceleration detection means has a predetermined threshold value. When it exceeds, the printing is temporarily stopped, and when the acceleration or the amount of change in acceleration becomes smaller than a predetermined threshold value, the printing is restarted from the data next to the last printed data when the printing is temporarily stopped. An inkjet printing system for mounting on a vehicle, which is characterized by: 6. The vehicle-mounted inkjet printing system according to claim 5, wherein the carriage shaft is mounted on the vehicle such that the carriage shaft faces the front and rear of the vehicle. 7. The vehicle-mounted inkjet printing system according to claim 5, wherein the vehicle is a vehicle. 8. An inkjet printing system mounted on a vehicle, comprising: an acceleration detecting means for detecting an acceleration of the vehicle; and an acceleration predicting means for predicting the acceleration, wherein the acceleration predicting means predicts the acceleration. If it is determined that the predicted value of acceleration or the amount of change in the predicted value exceeds a predetermined threshold value within a predetermined period, printing is temporarily stopped, and then the predicted value of acceleration or An inkjet printing system for mounting on a vehicle, wherein printing is restarted when it is determined that the amount of change in the predicted value becomes smaller than a predetermined threshold value. 9. The acceleration predicting means predicts the acceleration by inputting at least one of an output signal of the acceleration detecting means, an output signal of the speed detecting means and an output signal of the driving source rotational speed detecting means. The inkjet printing system for mounting on a vehicle according to claim 8, wherein: 10. The acceleration predicting means has a multidimensional map in which the acceleration predicted value is used as an independent variable, and at least one of vehicle speed and drive source rotation speed is used as a dependent variable. The inkjet printing system for mounting a vehicle according to claim 8 or 9, wherein the acceleration of the vehicle is predicted. 11. The printing is temporarily stopped when the printing of a line currently being printed is completed, and the printing is restarted from the line next to the line where the printing is completed. Claim 8 ~
11. The vehicle-mounted inkjet printing system according to any one of 10. 12. The predetermined period when the printing is temporarily stopped is the next forward movement period or backward movement period of the carriage,
Alternatively, it is the next reciprocating period of the carriage, and the predetermined period when resuming printing is the forward or backward period of the carriage or the reciprocating period from the time when the printing is resumed, The vehicle-equipped inkjet printing system according to any one of claims 8 to 11, wherein the inkjet printing system is mounted on a vehicle. 13. The inkjet printing system for mounting a vehicle according to claim 8, wherein the carriage shaft is mounted on the vehicle such that the carriage shaft faces the front and rear of the vehicle. 14. The vehicle-equipped inkjet printing system according to claim 8, wherein the vehicle is a vehicle. 15. A method for controlling an inkjet printer mounted on a vehicle, wherein acceleration of the vehicle is detected and printing is stopped when the acceleration detection value exceeds a predetermined threshold value. A method for controlling a vehicle-mounted inkjet printer. 16. When the printing is stopped, the paper is ejected, and when the acceleration of the vehicle or the amount of change in the acceleration becomes smaller than a predetermined threshold value, new print paper is fed. , When the page where the printing is stopped continues printing from the data of the first line, or when a new print paper is fed and the acceleration or the acceleration change amount of the vehicle becomes smaller than a predetermined threshold value. 16. The method for controlling a vehicle-mounted inkjet printer according to claim 15, wherein the printing is restarted from the top data of the page where the printing is stopped. 17. A method for controlling an inkjet printer mounted on a vehicle, wherein when the acceleration or the amount of change in acceleration of the vehicle exceeds a predetermined threshold, printing is temporarily stopped, and the amount of change in acceleration or the amount of acceleration changes. Is smaller than a predetermined threshold value, the printing is restarted from the data next to the last printed data when the printing is temporarily stopped. 18. A method of controlling an inkjet printer mounted on a vehicle, comprising: predicting an acceleration of the vehicle; and predicting a predicted value of the predicted acceleration or a change amount of the predicted value within a predetermined period. When it is determined that the threshold value is exceeded, the printing is temporarily stopped, and thereafter, when the predicted value of the acceleration or the change amount of the predicted value becomes smaller than a predetermined threshold value within a predetermined period, the printing is restarted. A method for controlling an inkjet printer, comprising: 19. A multidimensional map having an acceleration predicted value as an independent variable and at least one of vehicle speed and drive source rotation speed as a dependent variable, and predicting the acceleration of the vehicle based on the multidimensional map. 15. The method according to claim 15, wherein
19. The method for controlling the inkjet printer described in any one of 18. 20. The printing is temporarily stopped when the printing of the line currently being printed is completed, and the printing is restarted from the line next to the line where the printing is completed. Claim 15
19. The method for controlling an inkjet printer according to any one of 18 to 18. 21. The predetermined period when the printing is temporarily stopped is a next forward movement period or a backward movement period of the carriage,
Alternatively, it is the next reciprocating period of the carriage, and the predetermined period when the printing is restarted is the forward or backward period of the carriage or the reciprocating period from the time when the printing is restarted. A method for controlling an inkjet printer, comprising: