JP2016007787A - Printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer suppressing density variations and performing printing with density set as a reference.SOLUTION: A printer 20 discharging ink containing at least pigment and being stored in ink cartridges 56 and performing printing comprises: a density setting section 102 receiving density setting related to density for the printing; a setting information storage section 104 storing the density setting received; an image processing section 110 adjusting density of image data on the basis of the density setting stored and generating printing data on the basis of the image data having the density adjusted; and a printing section 130 performing the printing by selectively discharging the ink on the basis of the printing data.

Description

  The present invention relates to a printing apparatus.

Ink jet printers that selectively eject ink droplets from a nozzle onto a print medium and record a desired image on the print medium have recently increased ink density per dot while increasing the density of the nozzles that eject the ink droplets. By reducing the discharge amount, further high-resolution image recording is realized.
Ink jet printers are required to have clearness of printing, water resistance, light resistance, and the like, and as one method for achieving them, printers that use pigments rather than dyes as ink colorants are known. In the ink using the pigment, the pigment is present in a state of being dispersed in the ink solvent. If the pigment is left standing for a long period of time, the pigment having a specific gravity larger than that of the solvent settles at the bottom of the ink tank. For this reason, there is a known problem that a difference in density of the pigment occurs between the upper layer portion and the lower layer portion of the ink stored in the ink tank, resulting in a difference in print density.
Patent Document 1 below discloses a technique for determining the amount of ink to be used in accordance with the passage of time when an ink tank is mounted in order to reduce a difference in print density in a printer using a pigment.

JP 2005-131908 A

However, in the disclosed technology, the amount of ink is determined by the passage of time when the ink tank is attached, and therefore, the printing may be performed with a density that is significantly different from the density desired by the user. It took a lot of work to do.
The present invention has been made in view of the above-described problems, and an object of the present invention is to perform printing while suppressing a change in density using a set density as a reference.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
The printing apparatus according to this application example is a printing apparatus that includes at least a pigment and discharges and prints ink stored in a container, and the density setting unit that receives density settings related to the density to be printed, and the received density A storage unit that stores settings; an image processing unit that adjusts the density of image data based on the density settings stored in the storage unit; and that generates print data based on the image data that has been adjusted in density. And a printing unit that prints by ejecting the ink based on the print data.

  According to such a configuration, the density of the image data is adjusted based on the density setting received by the density setting unit, and printing is performed based on the print data generated based on the image data whose density has been adjusted. Therefore, since the density is adjusted based on the density setting received by the density setting unit, it is possible to perform printing while suppressing the density change of the ink including the pigment based on the set density by appropriately adjusting the density. .

[Application Example 2]
In the printing apparatus according to the application example, a time measurement unit that measures elapsed time, a posture detection unit that detects a mounted posture, and a usage amount that uses the ink after the container is mounted is acquired. It is preferable that the image processing unit adjust the density based on at least one of the elapsed time, the posture, and the usage amount.

  According to such a configuration, the density is adjusted based on at least one of the elapsed time, the posture, and the amount of ink used. Therefore, it is possible to appropriately adjust the variation due to the passage of time, the posture change, and the ink usage amount.

[Application Example 3]
In the printing apparatus according to the application example, it is preferable that the image processing unit adjusts the density and the density set in the density setting to be opposite in accordance with the usage amount acquired by the usage amount acquisition unit. .

  According to such a configuration, the density is adjusted so that the density and the density set in the density setting are reversed according to the usage amount of the ink used after the container is mounted. Concentration variation can be adjusted appropriately.

[Application Example 4]
In the printing apparatus according to the application example described above, it is preferable that the image processing unit adjusts the density according to the posture detected by the posture detection unit and the elapsed time after the posture is detected. .

  According to such a configuration, the concentration is adjusted according to the posture detected by the posture detection unit and the elapsed time after the posture is detected. Can be adjusted appropriately.

[Application Example 5]
In the printing apparatus according to the application example, the ink is held by a porous ink absorber included in the container, and the image processing unit determines whether the ink settles in the ink absorber based on the posture. It is preferable to adjust the density when it is determined whether or not the ink is settled.

  According to such a configuration, the density can be adjusted when the ink settles in the ink absorber.

[Application Example 6]
In the printing apparatus according to the application example described above, when the image processing unit determines that the ink concentration of the acquisition port for acquiring the ink from the container increases as time passes, when the ink settles, It is preferable to adjust the density setting so as to become lighter according to the elapsed time when the density setting is adjusted so as to become lighter according to time and it is determined that the ink density of the acquisition port becomes lighter as time elapses.

  According to such a configuration, it is determined whether or not the ink concentration of the acquisition port for acquiring ink from the container is increased or decreased according to the elapsed time due to the ink settling, and based on the determined result, Concentration can be adjusted appropriately.

[Application Example 7]
In the printing apparatus according to the application example, the density setting unit displays a predetermined number of options relating to print density, receives the density setting by selecting one of the displayed options, and the image processing unit includes: It is preferable that one of the candidate values greater than the predetermined number is determined and used as the density of the image data.

  According to such a configuration, it is possible to simplify the selection in the density setting unit and moderate the density change of the image to be printed by the selected density setting.

[Application Example 8]
In the printing apparatus according to the application example described above, it is preferable that when the container is replaced, the storage unit changes the stored density setting to a predetermined initial value.

  According to such a configuration, when the container is replaced, the concentration setting is changed to a predetermined initial value, so that the concentration setting can be initialized when the container is replaced.

1 is a configuration diagram showing an outline of a configuration of a printer according to an embodiment of the present invention. (A) shows the state in which the printer is placed upright, and (b) shows the inversion sensor viewed from the side of the printer. (A) shows the state in which the printer is inverted, and (b) is a view of the inversion sensor viewed from the side of the printer. FIG. 3 is a diagram illustrating a functional configuration of a printer. FIG. 6 is a diagram for explaining density correction according to ink usage. The figure explaining the density correction according to the mounting posture of the printer and the passage of time.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment)
FIG. 1 is a configuration diagram illustrating an outline of a configuration of a printer 20 which is an embodiment of a printing apparatus. This printer 20 applies CMYK inks such as cyan (C), magenta (M), yellow (Y), and black (K) to the paper P transported in the transport direction based on the print data. It is configured as an ink jet printer that performs printing by discharging and discharges paper. The ink used in the printer 20 is assumed to be a pigment-based ink in which a pigment is dispersed in a solvent.
The printer 20 includes a printer unit 26, a memory card controller 24, a USB controller 28, an operation panel 36, a main controller 30, and an inversion sensor 21.
The printer unit 26 has a function of executing printing. The memory card controller 24 reads / writes a file storing data from / to the memory card MC inserted into the memory card slot 23.
The USB controller 28 communicates with the computer 10 via a USB cable (not shown). The operation panel 36 displays a menu screen, a print setting screen, and the like on the display unit 37, and inputs various print setting instructions, a print start instruction, and the like through operation of buttons 38 by the user.
The main controller 30 has a function for controlling the entire printer. The inversion sensor 21 detects the posture where the printer 20 is placed.
The printer 20 is configured such that the printer unit 26, the memory card controller 24, the USB controller 28, and the main controller 30 can exchange various control signals and data with each other via the bus 29.

The memory card controller 24 inputs and outputs data with the memory card MC inserted into the memory card slot 23.
The printer unit 26 includes a printer engine 26a and a printer ASIC 26b that controls the printer engine 26a. The printer engine 26 a includes a paper feed mechanism 41 that transports the paper P in the transport direction (from the back to the front in the drawing) by driving the transport roller 44 by the transport motor 48, and the paper P that is transported onto the platen 50 by the paper feed mechanism 41. And a head drive mechanism 51 that performs printing by ejecting ink droplets from the print head 55. Here, the platen 50 is provided with a rib 50a for supporting the paper P and a dumping region 50b for receiving the ink that has been dumped out of the paper P so that the back surface of the paper P is not stained with ink during borderless printing. ing. The platen 50 has a concavo-convex portion formed on the upper surface by the rib 50a and the discarding region 50b.

The head drive mechanism 51 includes a carriage motor 57a, a driven roller 57b, a carriage belt 54, a carriage 52, an ink cartridge 56, and a print head 55.
The carriage motor 57a is disposed on the right side (main scanning direction) of the mechanical frame 80, and the driven roller 57b is disposed on the left side (main scanning direction) of the mechanical frame 80. The carriage belt 54 is installed on a carriage motor 57a and a driven roller 57b.
The carriage 52 reciprocates left and right (main scanning direction) along the guide 53 by the carriage belt 54 as the carriage motor 57a is driven.
The ink cartridge 56 is a container that is mounted on the carriage 52 and individually accommodates yellow (Y), magenta (M), cyan (C), and black (K) inks containing pigment. The print head 55 has a function of ejecting ink droplets by receiving ink supplied from the ink cartridge 56 and pressurizing the ink with a piezoelectric element.

A light emitting element (for example, a light emitting diode) and a light receiving element (for example, a phototransistor) are provided on the mechanical frame 80 so that the optical scale 59a is opposed to the optical scale 59a along the moving direction of the carriage 52. Etc.) is attached. The light receiving element can detect the position of the carriage 52 in the left-right direction (main scanning direction) by receiving light emitted from the light emitting element of the optical sensor 59b toward the optical scale 59a.
In this embodiment, the ink cartridge 56 uses a sponge or the like made of a continuous fine porous material such as polyurethane having elasticity and absorbability as an ink absorber that holds ink (not shown).

  The paper feed mechanism 41 includes a transport roller 44 that transports paper P fed from a tray or cassette (not shown) onto a platen 50 facing the print head 55, and discharges the paper P to a paper discharge tray that is a discharge end. A paper discharge roller 46 for paper, a transport roller 44, and a transport motor 48 that rotationally drives the paper discharge roller 46 are provided.

The main controller 30 is configured as a microprocessor centered on a CPU 31, and includes a ROM 32 that stores various processing programs, a RAM 33 that temporarily stores data and saves data, and can write and erase data. A flash memory 34 and an interface (I / F) 35 are provided. A data file may be input to the main controller 30 via the memory card controller 24 from the memory card MC inserted in the memory card slot 23. This data file includes image data to be printed. It is also possible to assume a mode in which the data file to be printed is transmitted from the computer 10 and received by the USB controller 28.
Further, command signals from the buttons 38 on the operation panel 36 may be input via the I / F 35. Furthermore, detection signals from various sensors that detect the driving state of the printer engine 26a may be input via the printer ASIC 26b.

Further, the main controller 30 outputs transmission data to be transmitted to the computer 10 to the USB controller 28, outputs a control signal to the display unit 37 of the operation panel 36 via the I / F 35, and drives the printer engine 26a. Is output to the printer ASIC 26b. The RAM 33 is provided with a print buffer area, and print data sent from the computer 10 via the USB controller 28 is stored in the print buffer area.
2 and 3 are diagrams for explaining the inversion sensor 21. In the present embodiment, the printer 20 can print even when it is placed in various postures. 2A shows a state in which the bottom of the printer 20 is placed on the horizontal plane (placement), and FIG. 2B is a view of the inversion sensor 21 viewed from the side of the printer 20 (view A). . 3A shows a state in which the vertically placed printer 20 is turned upside down (inverted), that is, a state in which the bottom of the printer 20 faces upward, and FIG. 3B shows a side view of the printer 20. It is the figure which looked at the inversion sensor 21 from the side (A view).

The inversion sensor 21 is disposed around one end of the mechanical frame 80. This inversion sensor 21 is a box-like form having four corners, and a light-emitting unit 90 that emits light of a predetermined wavelength, such as a light-emitting diode, is opposed to both sides of the light-emitting unit 90, for example. Two light receiving portions (92A and 92B) that are arranged at positions and output a signal corresponding to the amount of received light like a phototransistor are mounted. In addition, a spherical shielding member 94 that reflects light is movably enclosed in the box-shaped interior.
As shown in FIG. 2B, in a state where the printer 20 is placed upright, the shielding member 94 moves to the light emitting unit 90 side according to gravity, so that the light emitted from the light emitting unit 90 is shielded by the shielding member 94. The Accordingly, the two light receiving portions (92A, 92B) both output signals in a non-light receiving state.
As shown in FIG. 3B, when the printer 20 is turned upside down, the shielding member 94 moves to the side facing the light emitting unit 90 according to gravity, so that the light emitted from the light emitting unit 90 The light is reflected at 94 and reaches the two light receiving portions (92A, 92B). Accordingly, the two light receiving units (92A, 92B) both output a light receiving state signal.

Therefore, based on the output signals of the two light receiving units (92A, 92B), it can be determined whether the printer 20 is in the normal state or the inverted state. The inversion sensor 21 is not limited to such an aspect.
FIG. 4 is a diagram illustrating a functional configuration of the printer 20. The printer 20 includes a density setting unit 102, a setting information storage unit 104, an image processing unit 110, a print target data acquisition unit 106, and a printing unit 130.
In addition, the image processing unit 110 includes an attitude acquisition unit 112, a time measurement unit 114, a density determination unit 116, a density adjustment unit 118, and a print data generation unit 120. In the present embodiment, the image processing unit 110 realizes each function by the cooperation of the hardware and software of the main controller 30.
The density setting unit 102 receives a density setting related to the printing density set by the user operating the operation panel 36. In the present embodiment, it is assumed that three options “dark”, “normal”, and “light” are displayed on the display unit 37 and the user operates the buttons 38 to select.

The density setting unit 102 determines the color correction parameter according to the setting selected by the user. For example, when “dark” is selected, the brightness is darkened, the saturation is brightened, and the RGB values are set so that red is stronger. When “light” is selected, the brightness is increased, the saturation is set as a default setting value, and the RGB values are set so that the bluish green becomes stronger. Information on the color correction parameters determined by the density setting unit 102 is sent to the setting information storage unit 104.
The setting information storage unit 104 stores the color correction parameter information sent from the density setting unit 102 in the flash memory 34. When the ink cartridge 56 is replaced, the setting information storage unit 104 rewrites the stored color correction parameter information to a predetermined initial value (default value).

The print target data acquisition unit 106 assumes the USB controller 28, the memory card controller 24, and the like, acquires image data to be printed in a file format, and accepts a print instruction for the acquired image data. The image data acquired by the print target data acquisition unit 106 is sent to the image processing unit 110.
The attitude acquisition unit 112 acquires information on the attitude of the printer 20 on the basis of a signal obtained from the inversion sensor 21. The posture information acquired by the posture acquisition unit 112 is referred to by the density determination unit 116. Note that the posture acquisition unit 112 corresponds to a posture detection unit.

The time measurement unit 114 can measure the elapsed time by a timer function and notify the concentration determination unit 116 of the elapsed time, and can associate the elapsed time information with the posture information acquired by the posture acquisition unit 112.
The ink usage amount acquisition unit 115 acquires information on the ink usage amount that consumed ink from the installed ink cartridge 56. The amount of ink used may be determined by measuring the remaining amount of ink in the ink cartridge 56 or counting the number of times ink droplets have been ejected. Alternatively, the time measurement unit 114 may measure the time that the ink cartridge 56 has been used, and calculate the usage amount based on the measured time.
The information on the ink usage acquired by the ink usage acquisition unit 115 is referred to by the density determination unit 116. The ink usage amount acquisition unit 115 corresponds to a usage amount acquisition unit.
In the present embodiment, the posture acquisition unit 112 and the time measurement unit 114 have a battery function that can store electricity, and even when the printer 20 is not driven because the printer 20 is powered off, Posture information can be acquired at predetermined time intervals, and posture information and time information can be associated with each other and stored in the setting information storage unit 104. The printer 20 can refer to these pieces of information stored in the setting information storage unit 104 as necessary when transitioning to the driven state.
The density determination unit 116 uses the density adjustment unit 118 based on the color correction parameter information stored in the flash memory 34, the posture information acquired by the posture acquisition unit 112, and the elapsed time information measured by the time measurement unit 114. A density correction parameter for correcting the density is determined.
In the present embodiment, the density correction parameter is determined in more detail than the color correction parameter determined according to the setting selected by the user. For example, the color correction parameter is determined as a candidate value corresponding to one option selected by the user from among a predetermined number of three stages, but the density correction parameter is larger than the predetermined number and is set in advance to 10 Any one of the candidate values for the stage is determined. As a result, the setting by the user is simplified and the density change of the image to be printed can be moderated.

Here, with reference to FIG. 5 and FIG. 6, the process of determining the density correction parameter will be described.
In the present embodiment, the density determination unit 116 assumes two corrections: density correction according to the amount of ink used, and density correction according to the orientation of the printer 20 and the passage of time.
<Density correction according to ink usage>
FIG. 5 is a diagram illustrating density correction according to the amount of ink used. In this case, when the ink acquisition port (acquisition port) of the ink cartridge 56 is stored so as to face upward (pattern A), and when the ink acquisition port of the ink cartridge 56 is stored so as to face downward (pattern B). ) Can be assumed.
In the pattern A, in a state where the ink cartridge 56 is stored, the ink has settled on the bottom of the ink cartridge 56, that is, the ink in the vicinity of the ink acquisition port has a low density. When the ink cartridge 56 is attached to the printer 20 in this state, low density ink is supplied to the print head 55, and an image lighter than the assumed density is printed. Therefore, in this state, the “dark” setting is selected by the density setting unit 102.

Subsequently, when printing is continued with the printer 20, the ink supplied to the print head 55 gradually becomes a high-density ink, and a dark image is gradually printed. Therefore, in the pattern A, the density determination unit 116 determines the density correction parameter so that the density is reversed by setting opposite to the “dark” setting in the density setting unit 102, that is, the density is reversed.
In the pattern B, in a state where the ink cartridge 56 is stored, the ink has settled on the ink acquisition port side of the ink cartridge 56, that is, the ink in the vicinity of the ink acquisition port has a high concentration. When the ink cartridge 56 is attached to the printer 20 in this state, high-density ink is supplied to the print head 55, and an image darker than the assumed density is printed. Therefore, in this state, the “light” setting is selected by the density setting unit 102.
Subsequently, when printing is continued by the printer 20, the ink supplied to the print head 55 gradually becomes a low-density ink, and a thin image is gradually printed. Therefore, in the pattern B, the density determination unit 116 determines the density correction parameter so that the density is reversed by setting opposite to the “light” setting in the density setting unit 102, that is, the density is reversed.

<Density correction according to posture and time passage>
FIG. 6 is a diagram illustrating density correction according to the mounting posture of the printer 20 and the passage of time. In this case, it can be assumed that the printer 20 is placed upright (pattern A) and the printer 20 is turned upside down (pattern B). In any case, the density determination unit 116 determines whether or not the ink-containing component is settled by continuing the mounting posture in the ink absorber in the ink cartridge 56. As a result, when sedimentation is determined, the density determination unit 116 performs any process according to the mounting posture of the printer 20. In the present embodiment, when the printer 20 is placed vertically, the density correction process is set not to be performed.
In the pattern A, in a state where the ink cartridge 56 is stored, a state where the ink has settled on the bottom of the ink cartridge 56, that is, the ink density in the vicinity of the ink acquisition port is low. In this state, when the ink cartridge 56 is installed in the printer 20 and installed in the normal position (t = 0), the low-density ink is supplied to the print head 55. Therefore, in this state, the “dark” setting is selected by the density setting unit 102.

However, as time passes, the state transitions to a state (t = t1) in which high-density ink is supplied to the print head 55 due to ink settling. Therefore, in the pattern A, as the time elapses, the density determination unit 116 determines the density correction parameter so that the setting is opposite to the “dark” setting in the density setting unit 102, that is, becomes lighter.
In the pattern B, in a state where the ink cartridge 56 is stored, the ink has settled on the ink acquisition port side of the ink cartridge 56, that is, the ink density near the ink acquisition port is high. In this state, when the ink cartridge 56 is mounted on the printer 20 and installed in an inverted position (t = 0), a high-density ink is supplied to the print head 55. Therefore, in this state, the “light” setting is selected by the density setting unit 102.
However, as time passes, the state transitions to a state (t = t1) in which low-density ink is supplied to the print head 55 due to ink settling. Therefore, in the pattern B, as the time elapses, the density determination unit 116 determines a density correction parameter that is opposite to the “light” setting in the density setting unit 102, that is, the density correction parameter is set to be darker.

The processing described above differs depending on the mounting state before the ink cartridge 56 is mounted. Information regarding the vertical direction in which the ink cartridge 56 was placed may be input by the user operating the operation panel 36. The printer 20 detects the ink state inside the ink cartridge 56, and the ink density distribution. The mounting state of the ink cartridge 56 may be estimated from the above.
Returning to FIG. 4, the density adjustment unit 118 performs correction processing and enhancement processing on the image data acquired by the print target data acquisition unit 106. The correction process and the enhancement process are set by the user operating the operation panel 36 and giving an instruction.

In addition, the density adjustment unit 118 further performs density correction processing on the image data that has been subjected to correction processing and enhancement processing based on the density correction parameter determined by the density determination unit 116. The image data subjected to these processes is sent to the print data generation unit 120.
The print data generation unit 120 applies a known three-dimensional LUT (Look Up Table) or interpolation operation to the image data sent from the density adjustment unit 118 to perform color conversion processing for color conversion from RGB data to CMYK data. Then, halftone processing by a dither method, an error diffusion method, or the like is performed to generate print data in dot units. The generated print data is sent to the printing unit 130.
The printing unit 130 scans the carriage 52 in the main scanning direction while selectively ejecting ink indicated by the print data from the print head 55. At this time, the paper feed mechanism 41 intermittently moves the paper P in the sub-scanning direction in accordance with the movement of the carriage 52. As a result, an image image of the image data can be formed on the paper P.

According to the embodiment described above, the following effects can be obtained.
(1) Since the print density setting set by the user operating the operation panel 36 is corrected in accordance with the mounting posture of the printer 20, the passage of time, and the number of times of printing, the print density desired by the user is used as a reference. It is possible to avoid the print density from fluctuating due to the ink settling inside the ink cartridge 56.
(2) Since the inversion sensor 21 for detecting the mounting posture is provided, it is possible to easily detect that the mounting state of the printer 20 has changed.
An apparatus that implements the above-described method may be realized by a single apparatus or may be realized by combining a plurality of apparatuses, and includes various aspects.
Each configuration in each embodiment and a combination thereof are examples, and addition, omission, replacement, and other changes of the configuration can be made without departing from the spirit of the present invention. Further, the present invention is not limited by the embodiments, but is limited only by the scope of the claims.

  DESCRIPTION OF SYMBOLS 10 ... Computer, 20 ... Printer, 21 ... Inversion sensor, 23 ... Memory card slot, 24 ... Memory card controller, 26 ... Printer unit, 26a ... Printer engine, 26b ... Printer ASIC, 28 ... USB controller, 29 ... Bus, 30 ... main controller, 31 ... CPU, 32 ... stored ROM, 33 ... RAM, 34 ... flash memory, 35 ... I / F, 36 ... operation panel, 37 ... display unit, 38 ... buttons, 41 ... paper feed mechanism, 44 ... Conveying roller, 46 ... Discharge roller, 48 ... Conveying motor, 50 ... Platen, 50a ... Rib, 50b ... Discarding area, 51 ... Head drive mechanism, 52 ... Carriage, 53 ... Guide, 54 ... Carriage belt, 55 ... Print head, 56 ... ink cartridge, 7a ... Carriage motor, 57b ... Driven roller, 59a ... Optical scale, 59b ... Optical sensor, 80 ... Mechanical frame, 90 ... Light emitting part, 92A, 92B ... Light receiving part, 94 ... Shielding member, 102 ... Density setting part, 104 ... Setting information storage unit 106 ... Print target data acquisition unit 110 ... Image processing unit 112 ... Attitude acquisition unit 114 ... Time measurement unit 115 ... Ink use amount acquisition unit 116 ... Density determination unit 118 ... Density adjustment unit 120 ... print data generation unit, 130 ... print unit.

Claims (8)

A printing apparatus that includes at least a pigment and discharges and prints ink contained in a container,
A density setting unit that receives density settings related to the density to be printed;
A storage unit for storing the received density setting;
An image processing unit that adjusts the density of image data based on the density setting stored in the storage unit, and generates print data based on the image data that has been adjusted in density;
A printing unit that prints by ejecting the ink based on the print data. The printing apparatus according to claim 1,
A time measurement unit for measuring elapsed time;
A posture detection unit for detecting the mounted posture;
A usage amount acquisition unit that acquires the usage amount of the ink after the container is mounted;
The printing apparatus, wherein the image processing unit adjusts the density based on at least one of the elapsed time, the posture, and the usage amount. The printing apparatus according to claim 2,
The printing apparatus according to claim 1, wherein the image processing unit adjusts the density and density set in the density setting to be opposite in accordance with the usage amount acquired by the usage amount acquisition unit. The printing apparatus according to any one of claims 2 to 3,
The printing apparatus, wherein the image processing unit adjusts the density according to the posture detected by the posture detection unit and the elapsed time after the posture is detected. The printing apparatus according to claim 4,
The ink is held by a porous ink absorber provided in the container,
The image processing unit determines whether or not the ink is settled in the ink absorber based on the posture, and adjusts the density when it is determined that the ink is settled. apparatus. The printing apparatus according to claim 5, wherein
When the image processing unit determines that the ink density of the acquisition port for acquiring the ink from the container increases as time passes due to the ink settling, the density setting is decreased according to the elapsed time. And the density setting is adjusted so as to become darker according to the elapsed time when it is determined that the ink density of the acquisition port becomes lighter as time passes. The printing apparatus according to any one of claims 1 to 6,
The density setting unit displays a predetermined number of options relating to print density, and accepts the density setting by selecting one of the displayed options.
The printing apparatus, wherein the image processing unit determines one of the candidate values greater than the predetermined number and sets the density as the density of the image data. The printing apparatus according to any one of claims 2 to 7,
When the container is replaced, the storage unit changes the stored density setting to a predetermined initial value.