JPH058424A - Image recording method - Google Patents

Abstract

PURPOSE:To shorten recording time by making constant the ratio between the time during which maximum power is applied on a recording head and the time during which the recording head applies power on one pixel and varying the rate of recording operation of each of a plurality of thermal coloring layers thereby varying the energy to be applied thereon. CONSTITUTION:Assuming Pn is the maximum power of a thermal head 32, tn is a ratio of pixel size/operating rate, rn is a ratio of output time/tn, and En is the energy required for coloring each coloring layer of thermal recording material, following relation is satisfied; En= PnXrnXtn. N represents CMY of each coloring layer. Energy is imparted appropriately to the thermal recording material 10 by varying tn. A controller 45 controls the rotational speed of a supporting drum 30 so that a relationship tY<tM<tC is satisfied, where tY is 'weak' time interval, tM is 'intermediate' time interval, and tC is 'strong' time interval. Consequently, energy required for coloring other coloring layer can be obtained within a shorter time than that required for coloring the C pigment layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording method for scanning and recording with the same recording head on a thermal recording material or a recording medium of a different type provided with a plurality of transparent thermosensitive coloring layers which develop different hues. Regarding

[0002]

2. Description of the Related Art At present, there is a heat-sensitive recording method as a method of recording an image on a recording sheet using a heating element. In this heat-sensitive recording method, a heat-sensitive recording material in which a color former and a developer are applied to a support such as paper or synthetic paper is used, and the heat-sensitive recording material is heat-treated by a thermal head for recording. Such a heat-sensitive recording method does not require development, when the support is paper, the quality of the paper is similar to general paper, it is easy to handle, the color density is high, the recording device is simple and inexpensive, It is advantageous in that it produces less noise when compared to a dot printer, etc., and has rapidly become widespread in the fields of monochrome facsimiles and printers in recent years.

Further, in such a recording field, with the rapid development of the information industry, there is an increasing demand for easily obtaining a color hard copy from a terminal of an information device such as a computer or facsimile.

The applicant of the present invention provides a multicolor thermosensitive recording in which a transparent thermosensitive coloring image can be obtained by providing a transparent support with a coloring layer which is substantially transparent and develops different hues. Proposed materials (Japanese Patent Application No. 61-8078)
No. 7, Japanese Patent Application No. 62-88196, Japanese Patent Application No. 62-754
09). On this heat-sensitive recording material, a heat-sensitive head having heads arranged in the main scanning direction is scanned and recorded in the sub-scanning direction to record an image.

According to this, it is possible to obtain a multicolor image having excellent hue, excellent color separation, and good image storability which could not be obtained by the conventional thermal recording method.
Further, the obtained image may be a transmission image or a reflection image.

In such a thermosensitive recording paper, when one surface is provided with multiple color-developing layers, the uppermost layer (the layer closest to the surface) is heated and colored with an amount of heat that does not heat the other layers. It is necessary to fix this color forming layer and heat-treat the other color forming layers.

In this case, in order to color each color forming layer by a single thermal head, a thermal head is used so that at least the color forming layer (lowermost layer) having the lowest sensitivity outputs a power capable of forming a color. In this case, the scanning recording speed is kept constant, and the output of the thermal head is duty-controlled to control the energy applied to each color-developing layer so that the color-developing layers other than the lowermost layer are colored.

[0008]

However, in such an image recording method, since the thermal head power is reduced (duty is reduced) as the color forming layer becomes more sensitive, there is a large loss in time. Become.

Therefore, there is a problem in that the recording speed is significantly slower than that of an apparatus for recording only a highly sensitive coloring layer (for example, a recording apparatus for only black coloring such as a facsimile).

In view of the above facts, an object of the present invention is to obtain an image recording method capable of shortening the recording time by effectively utilizing the capability of the recording head.

[0011]

According to a first aspect of the present invention, the same recording head scans and records on a thermosensitive recording material provided with a plurality of transparent thermosensitive coloring layers having different sensitivities and different hues. In the image recording method for achieving the above, a product of a maximum power applied to the recording head and a ratio of a time during which the recording head applies power to one pixel and a time during which the recording head can supply the power, that is, a duty is fixed. It is characterized in that the energy given to each of the plurality of thermosensitive coloring layers by the recording head is changed by changing the scanning speed of the scan recording on each of the thermosensitive coloring layers.

According to a second aspect of the present invention, there is provided an image recording method for performing scanning recording on recording media having different sensitivities and different types by the same recording head, and a maximum power given to the recording head, The ratio of the time during which the recording head applies power to one pixel and the time during which it can apply power, that is, the product of the duty, is set to a constant value, and the scanning speed for scanning recording on each of the plurality of recording media is changed. Thus, the energy applied to each of the plurality of recording media by the recording head is changed.

According to a third aspect of the present invention, there is provided an image recording method for carrying out scanning recording by the same recording head on a thermosensitive recording material provided with a plurality of transparent thermosensitive coloring layers which have different sensitivities and develop different hues. And a product of a maximum power applied to the recording head and a time during which the recording head applies power to one pixel and a time during which the recording head can supply the power, that is, a duty within a predetermined range, By changing the scanning speed of the scan recording on each of the plurality of thermosensitive coloring layers, the energy applied to each of the plurality of thermosensitive coloring layers by the recording head is changed.

According to a fourth aspect of the present invention, there is provided an image recording method for performing scanning recording on recording mediums having different sensitivities and different types by the same recording head, and a maximum power given to the recording head, The ratio of the time during which the recording head applies power to one pixel and the time during which power can be applied to the pixel, that is, the product of the duty, is set to a value within a predetermined range, and the scanning speed of scanning recording on each of the plurality of recording media. Is changed to change the energy applied to each of the plurality of recording media by the recording head.

[0015]

According to the first aspect of the invention, the product of the maximum power applied to the recording head and the ratio (duty) between the time during which the recording head applies power to one pixel and the time during which it can apply power is calculated. The energy applied to each thermosensitive coloring layer of each thermosensitive recording material is changed with the recording scanning speed kept constant.

For example, when the transparent thermosensitive coloring layer is composed of three layers and a color image is obtained, the recording head is operated with a power for outputting the energy necessary for coloring the coloring layer having the lowest sensitivity. When recording on a coloring layer having a higher sensitivity than a coloring layer having a lower sensitivity, the transport speed of the thermosensitive recording material is sequentially increased.

As a result, the recording head can be effectively used and the total recording time can be shortened.

According to the second aspect of the present invention, similarly to the first aspect, the recording scanning speed is changed according to the sensitivity of each recording medium, so that the recording head is adjusted to the recording medium having the lowest sensitivity. The recording time can be shortened as compared with the case where the recording medium is defined and narrowed down (the duty is reduced) to adapt to another recording medium having high sensitivity.

According to the invention described in claim 3, the constant value in the invention described in claim 1 is optimum for each thermosensitive color-developing layer, but it should be such that it does not affect the quality of the finished image. For example, the product of the maximum power applied to the recording head and the ratio (duty) of the time during which the recording head applies power to one pixel and the time during which the recording head can supply the power does not necessarily have to be constant, but within a predetermined range. It just has to fit in.

According to the invention described in claim 4, the constant value in the invention described in claim 2 is optimal for different kinds of recording media, but it should be such that it does not affect the quality of the finished image. For example, the product of the maximum power applied to the recording head and the ratio (duty) of the time during which the recording head applies power to one pixel and the time during which the recording head can supply the power does not necessarily have to be constant, but within a predetermined range. It just has to fit in.

[0021]

FIG. 1 shows the schematic structure of an image recording apparatus according to this embodiment.

A slit hole-shaped loading / unloading port 112 for the heat-sensitive recording material 10 is provided on the front surface of the image recording apparatus so that an unprocessed heat-sensitive recording material 10 can be inserted by an operator's hand. A tray 114 is extended from the loading / unloading port 112 to the front side of the paper surface so that the thermal recording material 10 can be placed on the tray 114 and inserted into the loading / unloading port 112 in a plane. . Further, the heat-sensitive recording material 10 that has been subjected to the heat-sensitive treatment is discharged from the carry-in / out port 112.
The reference numeral 14 also serves as a pedestal for the discharged unprocessed heat-sensitive recording material. The tray 114 can be stored inside the apparatus by inserting it in the direction of the carry-in / discharge port 112.

A VTR 116, for example, is connected to the image recording apparatus, and an image recording signal at the time of image recording by a thermal head 32 (see FIG. 3) described later is created based on the image signal from the VTR 116. Has become. A CCD camera or the like may be used as an image signal source connected to the image recording apparatus.

On the front panel 117 provided with the loading / unloading port 112, a power switch 120, a display device 122 for displaying the number of prints, and a print button 124.
Is provided. An openable / closable sub-cover 126 is provided below the print button 124, and a fine adjustment knob (not shown) for image quality and the like is attached.

As shown in FIG. 2, in the thermal recording material 10, a cyan dye layer (hereinafter referred to as C dye layer) 108 and a magenta dye layer (hereinafter referred to as M dye) are formed in order from the bottom layer on one side of the coated paper 102 which is a paper support. Layer 104) and a yellow dye layer (hereinafter referred to as Y dye layer) 106 are provided, and all are transparent. The Y dye layer 106 and the M dye layer 10
Reference numeral 4 denotes a photofixing type layer, which is a layer having a property of not changing even after being heated by being irradiated with light having a wavelength of 420 nm and a wavelength of 365 nm.

As shown in FIGS. 3 to 5, when the tip of the thermal recording material 10 is inserted into the apparatus through the carry-in / out port 112, the limit switch 118 detects this and the driver 74 of the driver 74 detects it. It is sandwiched by a pair of transport rollers 72 driven by a driving force, guided and guided by the guide plate 70, and guided to the heat treatment section 28.

The heat processing section 28 is provided with a support drum 30 which is a rotating body and a line type thermal head 32 which is a recording head, and the thermal recording material 10 is thermally wound around the support drum 30. The head 32 is adapted to be heated. The support drum 30 is formed of a metallic cylindrical body 34, and an elastic body 36 is formed on the outer periphery thereof.
Is wrapped around. The support drum 30 is the driver 3
It is designed to rotate at a constant speed in the direction of arrow B in FIG. 3 to FIG. 5 by the driving force of 8, and has a role of sequentially making the thermal recording material 10 wound around the supporting drum 30 correspond to the thermal head 32. There is.

One of the thermal heads 32 is axially supported by the frame of the apparatus through a shaft 40, and the driving force of a driver 41 moves the thermal head 32 around the shaft 40 in the direction of arrow C in FIGS. 3 to 5 and in the opposite direction. The heating element 42 which is rotated and arranged on the other side is brought into contact with and separated from the heat-sensitive recording material 10 wound around the support drum 30. An image signal is output from the control device 45 to the heating element 42 when it contacts the heat-sensitive recording material 10, and an image is formed on the heat-sensitive recording material 10 by heat generation according to the image signal 100.

The heat-sensitive recording material 10 transported to the heat treatment section 28 by the transport roller 26 is guided in the transport direction by the guide plate 70 and constitutes a part of the holding section 46 provided on the outer periphery of the support drum 30. It reaches the recess 48. A latch claw 52, which constitutes a holding portion together with the concave portion 48, is axially supported by the concave portion 48 via a shaft 50 arranged in parallel with the rotation axis of the support drum 30. The latch claw 52 rotates in the direction of arrow D in FIGS. 3 to 5 via the shaft 50 by the driving force of the driver 49 when one end of the thermosensitive recording material 10 guided by the guide plate 44 is accommodated in the recess 48. By doing so, it has a role of holding one end of the thermal recording material. When the thermal recording material 10 is held by the latch claws 52, the thermal recording material 10 is sequentially wound around the outer circumference of the support drum 30 by the rotation of the support drum 30.

The timing at which the latch claw 52 holds the thermosensitive recording material 10 is set by the limit switch 54 provided in the middle of the conveying path of the thermosensitive recording material 10.
That is, the thermal recording material 10 is the limit switch 5
When the position 4 is reached, the actuator 56 of the limit switch 54 interferes with the thermal recording material 10 to switch the contact (in this embodiment, the normally open type limit switch is applied to the thermal recording material 10). It is turned on when it comes into contact with). An ON (high level) / OFF (low level) signal from the limit switch 54 is supplied to the control device 45, and the control device 45 controls the predetermined time (at least the heat sensitive recording material 10 according to the transport speed of the heat sensitive recording material 10). 10 is a concave portion 4
8 and the latch claw 52 is operated (see FIG. 3).
(Rotation in the direction of arrow D). This allows
In the holding state by the latch claw 52, the relative position between the thermosensitive recording material 10 and the support drum 30 is always constant, and the positioning is accurately performed.

Idle rollers 58, 60, 62 are provided at a plurality of locations (three locations in this embodiment) on the outer periphery of the support drum 30, and the support drum 30 and the idle rollers 58,
The heat-sensitive recording material 10 is supported by the supporting drums 3 and 60.
It is wrapped around the outer circumference of 0 in close contact.
Further, light sources 64A and 64B connected to the control device 45 via drivers 63A and 63B are arranged on the downstream side in the rotation direction of the support drum 30 at the position where the thermal recording material 10 is heated by the thermal head 32. 10 is irradiated with light. The wavelengths of this light are 420 nm and 365 nm, respectively, and the light source 64A is for fixing the Y dye layer 106 of the thermal recording material 10 and the light source 64B is for fixing the M dye layer 108. That is, in this embodiment, the support drum 30 is rotated three times in succession after the rotation is started. In the first rotation of the thermal recording material 10, the thermal head 32 heats the Y dye layer 106. Processing is performed and fixing is performed immediately after this processing.

At the next rotation of the support drum 30, that is, 2
The M dye layer 1 provided below the Y dye layer 106 in the rotation
04 (see FIG. 2) was heat treated and fixed, then 3
The C dye layer is heat-treated at the turn of rotation.

The heating element 4 that the thermal recording material 10 receives
The energy (heat amount) from 2 is "weak" during the first rotation of the support drum 30, has no effect on the lower M dye layer 104 and the C dye layer 108, and "is low" during the second rotation. It is controlled by the control device 45 so that it is "medium" and "strong" during the third rotation.

The control of high, medium, and low is determined by the rotational speed of the support drum 30 and the output energy of the thermal head 32.

That is, the maximum power that can be applied to the thermal recording material 10 by the thermal head 32 is P
n, the time (pixel size / scanning speed) that the thermal head 32 can give to one pixel (one main scan) is tn, and the maximum duty (output time / tn) to give power from the thermal head 32 to the thermal recording material 10 is rn. Assuming that the energy required for each coloring layer of the heat-sensitive recording material to develop the color to a practical maximum density is En, the following formula is established.

En = Pn × rn × tn (1) However, n indicates each color forming layer CMY.

In the present embodiment, by changing tn in the equation (1), energy suitable for each color forming layer is given to the heat-sensitive recording material 10. Since tn can be easily changed depending on the rotation speed of the support drum 30, the control device 45 controls the rotation speed of the support drum 30 to control the "weak" time (tY) and the "medium" time (tM).
), The "strong" time (tC) is tY <tM <tC (see FIGS. 6A, 6B and 6C).

As a result, the time required for developing the color of the C dye layer 108 (the time conventionally required for the color development of the other color layers) is shorter than that of the other color layers (Y dye layer 10).
6, it is possible to obtain the energy required for developing the color of the M dye layer 104).

After the heat treatment of the C dye layer 108 is completed, the thermal recording material 10 is placed at the position of the idle roller 62.
By releasing the holding by the holding portion 46, the heat-sensitive recording material 10 is guided between the guide plate 66 and the guide plate 68 and reaches the carry-in / discharge port 112.

The control device 45 includes a CPU 82 and a RAM 8
4, a ROM 86, an input port 88, an output port 90, and a micro computer 94 including a bus 92 such as a data bus or a control bus connecting these. A print button 124 and a limit switch 118 are connected to the input port 88, and a series of heat treatments are performed by operating the print button 124 and detecting the thermal recording material 10 by the limit switch 118. Further, the signal line 98 from the limit switch 54 is connected to the input port 88.

The output port 90 has a support drum 30, a thermal head 32, a latch claw 52, and light sources 64A, 64.
B and the conveyance roller 72 are the drivers 38, 41 and 4 respectively.
They are connected via 9, 63A, 63B and 74, and their respective drives are controlled. A signal line 100 for supplying the image signal to the thermal head 32 is also connected to the output port 90.

The operation of this embodiment will be described below. When the print button 124 is operated, the thermal recording material 10 is loaded.
It is inserted from the discharge port 112 and guided by the guide plate 70 to move. When the limit switch 118 is turned on, the conveyance roller 72 starts driving and is conveyed by a predetermined amount. When the print button 124 is not operated, the conveyance roller 72 is not driven even when the limit switch 118 is turned on, and the drive is started after waiting for the operation of the print button 124.

When the thermal recording material 10 is further conveyed, it comes into contact with the actuator 56 of the limit switch 54. Here, when the limit switch 54 is turned on, a high-level signal is input to the input port 88, and the latch claw 52 is rotated in the direction of arrow D after a predetermined time has elapsed. The recording material 10 is accommodated in the recessed portion 48 of the support drum 30, and the leading end portion of the recording material 10 is in contact with the locking portion 49. The latch claw 52 holds the leading end portion.

The tip of the thermal recording material 10 has a latch claw 52.
When held by, the support drum 30 starts rotating in the direction of arrow B (first rotation). First heat treatment control is performed. That is, the holding portion 46 is the thermal head 3
After passing through the second heating element 42, a drive signal is output from the output port 90 via the driver 41, the thermal head 32 is rotated about the shaft 40 in the direction of arrow C, and the heating element 4
2 contacts the thermal recording material 10. As a result, the support drum 30 is rotated with the heating element 42 in contact with the thermal recording material 10, and an image signal is output to the heating element 42 in response to this rotation.

The heating element 42 is set so that the maximum amount of heat is "weak" (see the solid line in FIG. 6A), and the heat-sensitive recording material 10 is heated while changing the duty according to this image signal representing the density of the Y coloring layer 106. Then, only the Y dye layer 106 is colored. When the heating process by the heating element 42 is completed, the thermal head 32 is rotated about the shaft 40 in the direction opposite to the arrow C, and the heating element 42 is separated from the thermal recording material 10.

Next, a wavelength of 42 is applied to the image surface of the photosensitive material 10.
Light of 0 nm is emitted from the light source 64A. This makes Y
The dye layer 106 is fixed and does not change even if heated thereafter.

When the first rotation of the support drum 30 is completed,
The process continuously moves to the second rotation, and the rotation number of the supporting drum 30 is increased to heat the M dye layer 104. That is,
The maximum amount of heat for the heat treatment by the heating element 42 switches to "medium" (see the solid line in FIG. 6B), and the Y dye layer 10 described above.
The same processing as the heating of No. 6 is performed, and the heat-sensitive recording material 10 is heated according to the image signal, and only the M dye layer 104 is colored. In this case, since the Y dye in the upper layer is fixed, it does not change. Further, since the relative position of the thermosensitive recording material 10 with respect to the support drum 30 does not change, it is possible to accurately color the images of the Y dye and the M dye without causing color misregistration.

The heat-sensitive recording material 10 on which the heat treatment of the M dye layer is completed is irradiated with light having a wavelength of 365 nm by the light source 64B, whereby the M dye layer 104 is fixed.

Then, moving to the third rotation, the supporting drum 30
And the heat treatment of the C dye layer 108 is performed. That is, the maximum amount of heat for the heat treatment by the heating element 42 is switched to "strong" (see the solid line in FIG. 6C), the thermal recording material 10 is heated according to the image signal, and only the C dye layer 108 is heated. Color it.

When a predetermined time elapses after the heating element 42 of the thermal head 32 is separated from the thermal recording material 10, the holding portion 46 passes the idle roller 62, and at this time, the thermal recording material 10 is held by the holding portion 46. The guide plate 66 and the guide plate 6 are released according to the rotation of the support drum 30.
8 is transported to and from.

The heat-sensitive recording material 10 between the guide plates 66 and 68 is nipped by the conveying roller 72 which is guided by the guide plate 70 and rotates in the reverse direction, and is conveyed by a predetermined amount by the conveying roller 72 to be carried in. -Sent to the discharge port 112 and placed on the tray 114. As a result, the heat treatment of one thermal recording material is completed.

Thus, in this embodiment, the support drum 3
By changing the rotation speed of 0, it is possible to obtain energy suitable for each color forming layer and not affecting other color forming layers without changing the duty of the power applied to the thermal head 32. The processing speed can be shortened as compared with the case where the duty is changed while keeping the scan recording time of (4) constant (see the chain line in FIG. 6).

The parameters under the control of this embodiment and the parameters under the conventional control are shown below.

[0054]

[Table 1] However, the thermosensitive recording material 10 used is an A4 plate (297 mm in the sub-scanning direction), and the pixel size is 80 μm × 80 μm. Further, vn is the rotation speed (sub-scanning speed) of the support drum 30, and Tt is the total recording time.

As shown in Table 1 above, it can be seen that the recording time, which was 270 seconds in total in the conventional example, can be recorded in about 187 seconds in total in this embodiment.

Although the recording of the color thermal recording material 10 has been described in the present embodiment, the black and white thermal recording material (En = 150 μJ) currently used in facsimiles and the like.
/ Pixel) is recorded by a recording device common to the color thermal recording material, the conventional recording time tn is 24 seconds (constant) with a duty of 12%.
By setting the duty to 65% and the recording time tn for one pixel to 4.3 ms, the same finished state can be obtained (see Table 2).

[0057]

[Table 2] However, Tt is the total recording time.

Further, although the thermal recording material is used in the above embodiment, the same effect can be obtained in sublimation transfer type and melt transfer type photosensitive materials which transfer an image from a photosensitive material to a copying material based on an image signal. You can

Furthermore, in the present embodiment, the thermal head 32 is used as the recording head and recording is performed by the heat generation amount of the heating element 42, but an optical recording head may be used.

In this embodiment, the heat-sensitive recording material 10 is wound around the supporting drum 30 for recording, and the rotational speed of the supporting drum 30 is changed to control the energy applied to each color forming layer. When the recording material 10 is nipped by a pair of conveying rollers and is conveyed linearly, this conveying speed may be changed.

Further, in the present embodiment, in the equation (1), P
Although both n and rn are constant, it is sufficient that the product (Pn x rn) is constant, so Pc>PM> PY and rc>rM>.
It may be rY.

Further, even if the Pn × rn combination is not completely constant and a Pn × rn combination that satisfies tc>tM> tY is selected, it is effective even though it is smaller than that of this embodiment.
Further, in this embodiment, all three colors of YMC are controlled by tn, but it is also effective to apply the present invention to at least two colors.

[0063]

As described above, the image recording method according to the present invention has an excellent effect that the recording time can be shortened by effectively utilizing the capability of the recording head.

[Brief description of drawings]

FIG. 1 is a perspective view showing the outer appearance of an image recording apparatus according to this embodiment.

FIG. 2 is a sectional view showing a multicolor heat-sensitive recording material applied to the invention.

FIG. 3 is a cross-sectional view showing the internal configuration of the image recording apparatus according to the present embodiment.

FIG. 4 is a control block diagram.

FIG. 5 is an enlarged view of the periphery of a support drum.

FIG. 6 is a time chart showing output energy characteristics to a heat-sensitive recording material.

[Explanation of symbols]

10 Thermal recording material 28 Heat treatment section 30 Support drum 32 Thermal Head 42 heating element 45 Control device

Claims (4)

[Claims] 1. An image recording method for scanning and recording on a thermosensitive recording material provided with a plurality of transparent thermosensitive coloring layers, each of which has a different sensitivity and develops a different hue, by the same recording head. The maximum power to be applied to the recording head and the ratio of the time during which the recording head is applying power to one pixel and the time during which the recording power can be applied to the pixel, that is, the product of the duty, is set to a constant value. An image recording method, characterized in that the energy applied to each of the plurality of thermosensitive coloring layers by the recording head is changed by changing the scanning speed of the scanning recording. 2. An image recording method for performing scanning recording on recording media having different sensitivities and different types by the same recording head, wherein the maximum power given to the recording head and the recording head is one pixel. By setting the ratio of the time during which power is applied to the time during which power can be applied, that is, the product of the duty, to a constant value, and changing the scanning speed of the scan recording on each of the plurality of recording media, the recording head An image recording method, wherein the energy applied to each of the plurality of recording media is changed. 3. An image recording method for scanning and recording with a single recording head on a thermal recording material having a plurality of transparent thermosensitive coloring layers each having different sensitivity and coloring in different hues. The maximum power given to the recording head and the ratio of the time during which the recording head is applying power to one pixel and the time during which the recording head can provide power, that is, the product of the duty, is set to a value within a predetermined range, and The image recording method is characterized in that the energy applied to each of the plurality of thermosensitive coloring layers by the recording head is changed by changing the scanning speed of the scanning recording to. 4. An image recording method for scanning and recording on recording media of different sensitivities and different types by the same recording head, wherein the maximum power given to the recording head and the recording head per pixel The ratio of the time during which power is applied and the time during which power can be applied, that is, the product of the duty is set to a value within a predetermined range, and the scanning speed of scanning recording on each of the plurality of recording media is changed,
An image recording method, wherein the energy applied to each of the plurality of recording media by the recording head is changed.