JPH03140248A - Recorder and its thermoregulator - Google Patents

Abstract

PURPOSE:To appropriately regulate the temperature of a recorder without increasing the cost of production or enlarging the size of the recorder even if the number of sensing system is increased by predetermining a reference value as an output of a sensing element and storing an output of the sensing system or the result of required calculation based on the output of the sensing system in a memory. CONSTITUTION:Diodes D1-D4 are respectively arranged in recording heads as temperature sensors, the temperature of each of the recording heads is sensed on the basis of the temperature characteristics of the potential drop VF in a regular order. After a head temperature control device is operated, a channel of analogy switch 52 is determined by outputs O1, O2. An output of an amplifier 53 connected to a selected recording head is A/D converted, and a value (V0-C1) is calculated by the constant C1 which is beforehand stored in a non volatile memory 55. Thereafter, the temperature T is determined by a calculation or a method which refers to a proper table, and insulating heaters 60-63 are on-off controlled by comparing the fluctuations of the temperatures T and T0. Thus, the temperature of each of the recording heads is controlled automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording device and a temperature adjustment device used in the device, and includes, for example, a plurality of analog sensors of the same type for detecting environmental conditions (e.g. temperature). The present invention relates to a device that measures environmental conditions by receiving the output of a sensor via an amplifier circuit, and adjusts the temperature of a print head used in a printing device.

7) The temperature adjustment device according to claim 3, further comprising means for providing information regarding the characteristics of the detection element.

(Margin below) [Prior Art] Fig. 13 shows a conventional measuring device for measuring environmental conditions (for example, temperature), where D is a diode as a sensor for detecting temperature; ^1. ^2 is the amplifier, and C is the central part of the measuring device.
It is PU. In this way, when measuring the input level from diode D, which is a conventional analog sensor, the amplifier (
It is common to level-convert the sensor output using It was adjusted by resistors (VRI, VH2). That is, as shown in FIG.
With respect to the temperature T-output value {circle around (2)} characteristic of an ideal amplifier, in reality, a circuit error of 6 degrees occurs. Therefore, the reference temperature To
When the amplifier output at point takes a value as shown at point A or point B, this is adjusted by a variable resistor (volume) so that it becomes vO.

[V4 Problems to be Solved by the Invention] However, in such a conventional example, when the number of systems (detection systems) consisting of sensors and their amplifiers is small, that is, there are few adjustment points, there are problems in terms of manufacturing costs, adjustment time, etc. Although the influence is small, the problem becomes more noticeable as the number of detection systems increases.

The present invention provides a recorder that can appropriately adjust the temperature without increasing manufacturing costs, increasing the size of the device, or lengthening the adjustment time even if the number of detection systems increases. The purpose of the present invention is to provide a device and a temperature control device.

[Means for Solving the Problems] To this end, in the present invention, in order to recognize the error amount Δ■ which was conventionally adjusted with a volume, data indicating characteristics of the circuit such as Δ■ or the V value at point A are converted into non-volatile data. The measured value is stored in a storage means such as a digital memory, and the measured value is corrected accordingly.

The recording apparatus of the present invention includes a recording head used for ejecting ink from an ejection port in response to a predetermined human power signal to form a desired image on a recording medium, and a recording head for controlling environmental conditions. a detection system including a detection element for detecting an environmental condition of the recording apparatus, and the detection element detects the output value of the detection system or performs a predetermined operation on the detection system output value. The present invention is characterized in that it comprises a temperature adjusting means comprising a storage means for storing the results of the determination, and a correction means for correcting the error of the detection system based on the stored contents.

be a sign.

Further, the temperature adjustment device of the present invention includes a detection system including a detection element for detecting environmental conditions of the recording device, and the detection element detects the output value of the detection system or the result of performing a predetermined calculation on the output value. It is characterized by comprising a storage means for storing information, and a correction means for correcting errors in the detection system based on the stored contents.

[Function] According to the present invention, by setting a reference value in advance as the detection element output and storing the detection system output at that time or the result of performing a predetermined calculation using this in the storage means, When controlling according to environmental conditions, the error of the detection system used is corrected based on the stored contents, so the output voltage level can be adjusted based on the rated error of the detection element and the offset voltage of the amplifier circuit. It is possible to obtain highly accurate measurement results and perform appropriate temperature adjustment without making any adjustments.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

(Example 1) FIG. 1 shows an example of the configuration of a so-called bubble jet (BJ) type color inkjet recording device having an electrothermal converter as an ejection energy generating means, which is a suitable device to which the present invention is applied. .

In FIG. 1, a recording medium 1 such as a paper or a plastic sheet is supported by conveyance rollers 2.3 consisting of a pair of rollers arranged above and below a recording area, and the conveyance rollers 2.3 are driven by a sheet feed motor 4. is transported in the direction of the arrow. A guide shaft 5 is provided in front of and parallel to the I2 feed rollers 2 and 3. A carriage 6 is reciprocated along this guide shaft 5 in the direction of arrow B by the output of a carriage motor 7 via a wire 8 .

A recording head unit 90, which is a BJ type inkjet head, is mounted on the carriage 6. This recording head unit 90 is for creating a color image, and is arranged in the scanning direction, and has cyan (C), magenta (M),
, yellow (Y), and black (BK), four recording pads 9, i.e., 98,
9B, 9C, 9D), the front side of each recording pad 9, that is, the recording medium 1 and a predetermined distance (for example, o, am
Plural numbers (64 pieces, 128 pieces,
A recording unit is provided in which 256 ink ejection ports are arranged in a vertical row.

That is, on the surface facing the recording medium 1, a plurality of ink ejection ports IO are formed at a predetermined pitch in the vertical direction, and the electrothermal transducer (heating resistor, etc.) 11 of each ink ejection port 10 is adjusted based on recording information. is driven (electrified and heated) to generate bubbles 11^ in the ink, and the pressure generated at this time forms flying ink droplets 12, and recording is performed while the ink dots are attached to the recording medium 1 in a predetermined pattern. .

Each recording head 9 is equipped with a circuit board of a drive circuit (driver) 29 for driving as described above.

The control circuit (CPII) of the recording device and the R attached to it
A control unit including OM, RAM, etc. is formed on the control board 15, and this control unit receives command signals and data signals (recorded information) from the host device 14 such as a computer, and performs various operations based on the command signals and data signals (recorded information). Each recording head 9^ to 9D is connected via the heat driver 13 together with a drive source such as a motor.
A driving voltage (heat voltage) for the electrothermal converter is applied to.

An online/offline switching key 1 is provided on the 1-operation panel 160 attached to the exterior case (not shown) of the recording device.
In addition to key setting sections such as 6A, line feed key 168, form feed key 16C1 and recording mode switching key 18D, a display section including several warning lamps such as alarm lamp IsE and power lamp 1[iF is provided.

FIG. 2 shows an example of the structure of a head chip disposed in each recording head according to this example. Here, 41 is a heater board, and an electrothermal converter (discharge heater) 45 is mounted on a silicon substrate.
and a first-class wiring 46 for supplying power thereto are formed using a film forming technique.

Then, a head chip is constructed by adhering to this heater board 41 a top plate 30 provided with a partition wall for forming a liquid path 25 for recording liquid.

The recording liquid (ink) is supplied through a supply port 2 provided on the top plate 30.
4 to the common liquid chamber 23, and from here to each nozzle 25.
Guided within. When the heater 45 generates heat due to energization, the ink filling the nozzle 29 bubbles, and ink droplets are ejected from the ejection port 26.

FIGS. 3(A) and 3(B) are a plan view and a partially enlarged view of the heater board according to the present example, respectively.

In the same figure (^), 43 is a discharge heater section.

44 is a terminal, which is connected to the outside by wire bonding. 42 is a temperature sensor serving as a temperature detection means;
The discharge heater section 43 is formed by the same film forming process as the discharge heater section 43 and the like. The same figure (It) is an enlarged view of the part B including the sensor 42 in the same figure (^), and 48 is a heat retention heater which is a heating means for heating the head.

The sensor 42, like other parts, is formed using a film formation process similar to semiconductors, so it has extremely high precision.
The other parts can be made of materials whose conductivity changes depending on temperature, such as aluminum, titanium, tantalum, tantalum pentoxide, and niobium. For example, among these
Aluminum is a material that can be used for electrodes, titanium is a material that can be placed between the heating resistor layer constituting the electrothermal conversion element and the electrode in order to improve their adhesion, and tantalum is a material that can be used as a protective layer on the heating resistor layer. A material that can be placed on top of it to increase cavitation resistance. In addition, the line width is made thicker to reduce process variations, and a meandering shape is used to increase the height and lower resistance in order to reduce the influence of wiring resistance and the like.

Note that it is also effective to use a diode as the sensor 42 and utilize the characteristic that the forward voltage changes with respect to temperature. FIG. 3(C) shows the temperature characteristics of the diode.

The heat retaining heater 48 can be formed using the same material as the heat generating resistance layer of the discharge heater 5 (for example, HfBz), but it may also be formed using other materials constituting the heater board, such as aluminum, tantalum, titanium, etc. .

Next, a mode of temperature control of the recording head according to this embodiment will be explained.

In the recording head shown in the second diagram according to the present example, temperature sensors 42 are provided at both ends of the heater board 410 as shown in FIG. You can understand the status. Further, since the heat-retaining heater 48 is provided near the temperature sensor 42, the response speed for detecting a change in temperature due to heating is high. By using this, control to keep the temperature distribution on the substrate constant can be performed with high responsiveness and stability.

FIG. 4 shows an outline of the control system of the inkjet recording apparatus shown in FIG. Here, 15A and 15B are respectively disposed on the control board 15, and each fl! ! This is an interface unit that sends and receives signals. The recording control unit 15A includes a CPU that executes control operations, a ROM that stores a program corresponding to the control procedure, and a microcomputer that includes a RAM that has a recording data expansion area and a work area. be able to. Furthermore, in this example, the central portion of the environmental condition measuring device, which will be described later with reference to FIG. 5, is integrally constructed.

FIG. 5 shows an example of the configuration of the temperature adjustment device according to the present example, which is integrated into the recording control section.

Here, D1 to D4 are temperature sensors 2 arranged in the recording heads 9A to 9D, and in this example, diodes are used. 51 is an amplifier having a constant current circuit;
2 is an analog switch, and control signals A and B
One of the outputs of the four amplifiers 51 is selected. 53 is an amplifier that receives the output.

54^ constitutes the main control unit of the apparatus according to this example, and is a CPIJ which executes correction data storage operations, measurement operations, etc. in accordance with the processing procedures etc. described later with reference to FIGS. 6 and 8.
4B is a ROM that stores programs and other fixed data corresponding to the processing procedure, and 54C is a RAM for data expansion or work. 5°5 is for example EEPROM
It is a non-volatile memory in the form of

Reference numerals 60 to 63 indicate the heat-retaining heaters 8 disposed on the heater boards of the recording heads 98 to 9D, respectively. Also, 56-5
9 is a driver for each heat-retaining heater.

Note that although the figure only shows one diode, etc. as a temperature sensor for each recording head, it is of course possible to provide two diodes, etc. for each recording head in accordance with the example shown in the third figure. Even if the number of detection sensors increases in the future, this example can effectively cope with the increase, as will be clear from what will be described below.

In this example, a diode is used as the temperature sensor, and temperature is detected based on the temperature characteristic of the forward voltage drop v2. The amplifier 51 is a constant current circuit, and a constant current of i-E+/R+ flows through the diode.

Of course, it is R1-R2-R3-R4 in order to set the conditions. The output selected by the analog switch 52 according to the control signals A and H is converted to the reference voltage E by the amplifier 53.
The difference is multiplied by Ra/Ra and output. In other words, the output of the amplifier 53 is Vo-E2-((
El"Vr)-Ez) x (R6/R5)-(E2-
(El-E2) -(R8/R5)) -vr-(R
a/R5)=Co"A-Vr"
-(1) (where Co=Ez-(El-E2)・(Ra
/Ra), lllm-(R6/R5)1, and vo
It can be seen that is a function of vl of the diode sensor.

However, in reality, the amplifiers used as the amplifiers 51 and 53 are not ideal amplifiers, and have input offset voltages, etc., and the effects of these on the final output v0 cannot be ignored. Here, the input offset voltage of the amplifier 51 is vl,
If the input offset voltage of the amplifier 52 is v2, then (1
) formula is Vo= (E2”V2) −((El”Vr”/+)−
(E2”V2)) ・(Ra/Ra)” (E2- (
E 1-E2) ' (R6/R5)) Q, -(v
I-V2) ' (Re/R5)-V, ・(Re/R5
) mc. +A-V, +v, +A・(v,-v2)-(:+
”A-Vr-(2) (where C
I"Go"V2+A(Vl-V2)), and the influence of the offset voltage vl+V2 appears. Furthermore, since an analog switch is used in FIG. 5, the voltage drop there will also affect the output v0.

Therefore, in Fig. 5, even if the voltage drops of the diodes O1 to D4 are the same, the values of the output v0 will differ among each other, and there will be a certain temperature unconditionally for a certain value of the output v0. It would be inconvenient to make it correspond.

In this example, the amplifier output V is calculated taking this reality into consideration.

The following method was adopted to correct the temperature and detect the accurate temperature of the head.

FIG. 6 shows an example of a procedure for obtaining the correction data, which can be executed, for example, during manufacturing or maintenance. From equation (2), Vo-C, +^・ν, (T), where C1 is a constant that differs for each circuit, A is a fixed constant, and VF(T) is a function of temperature T, so first, CI is In order to find it, for example, a voltage drop corresponding to the value of V at 25° C. is applied to a portion corresponding to Dn (1≦mouth≦4), and all vo at that time is converted to ^/D with cPυ54A (step 51.53 ).

Next, from equation (2), C, -V, -^-vr (25) corresponding to each circuit
- Calculate (3) to obtain C1 (step s5), store this CI in non-volatile memory (e.g. EEFROM, etc.) 5
5 (step S7). If this result v0 is detected, the equation (3) %formula %(4) is obtained, ^・V, (T) is obtained, and the predetermined temperatures T and A−V, (T ) The temperature T can be easily determined from the relationship.

Once the temperature of each head is determined in this way, each head 9^, 9B corresponding to C, M, Y, BK in FIG.

By independently controlling on/off the heat retaining heaters 10-13 disposed at 9G and 9D, it is possible to accurately control the head temperature to a desired temperature.

FIG. 8 shows an example of a head temperature control procedure using the configuration shown in FIG.

When this procedure is started, first the channel of the analog switch 52 is designated by the 01.02 output (step 5
ll), then convert the vo related to the selected head to ^10 (Step 513), in advance, store
5 and the constant C1 stored in 5 (step 515). Next, based on this result, the seventh
The temperature T is determined from the relationship shown in the figure by calculation or table reference (step 517). By comparing the magnitude of the temperature T obtained in this way and the control temperature To (step 5
19) On/off control of the heat insulating heaters in each head (steps 521, 523), that is, the temperature adjustment device according to this example automatically adjusts the head temperature for each head during driving. Therefore, variations in density, variations in ink ejection speed, variations in ink droplet landing points, etc. are extremely reduced, making it possible to form a good image.

(Example 2) In the first example above, a case was explained in which the temperature characteristics of the diode used in the sensor were uniform. This is appropriate for heater boards extracted from wafers of the same lot because there is almost no variation in diode characteristics. However, since inter-lot variations may actually exist, this embodiment also considers means for correcting such variations.

When Vr (T) varies individually for a given temperature T, ν takes a random value even at a given temperature in equation (2), that is, ■, -(:, +^・Vr (T)). However, the temperature characteristics of the diode are
As shown in the figure, when a constant current flows, the voltage drop v
Although r has a certain range with respect to temperature T, it has the characteristic that the rate of change is constant. Therefore, if the standard characteristics are represented by a in the graph shown in FIG.
+j+ (5) The following relationship holds true (here, Vr'
(T) is, for example, the temperature characteristic of a diode having the characteristic shown by b): That is, the difference between the b-line and the a-line is constant over the entire temperature range.

Now, assume that the circuit-specific constant C3 in equation (2) is obtained in the same manner as in the first embodiment and stored in the nonvolatile memory 55.

Further, the head is provided with means for identifying the V and characteristics specific to the diode. As a means for this, for example, a non-volatile memory may be added to the head, and the information may be stored therein and read out.

Alternatively, as shown in Figure 1O, several bits (in the figure 2
It is conceivable to form a pattern on the heater board that can contain identification information (bits) and convert it into binary information by cutting the pattern on the head side when inspecting the characteristic variation of the diode sensor.

Assuming the above, when a certain head is connected to the circuit shown in Figure 5, Vo'-C+''A・Vr
' (T) - (6) (C+ has already been determined and is stored in the nonvolatile memory 55).

Here, to know the current temperature of this head, use the reference characteristic (
It is necessary to clarify the relationship between line a) in FIG.

In other words, if the diode exhibits the standard characteristics, equation (6) is Vo=C++A・Vr (T) =
・(7). From equations (6) and (7), Vo' -Vo-A (Vr' (T) -Vr (T
) l = (8). By the way, (5
) According to the formula, the value in parentheses is a constant value, and this value is equal to the first value mentioned above.
Since it is possible to know by means such as shown in FIG. As a result, vo-v,'-A(VF' (T)-vr(T))
−(9) can be calculated and V o/ can be made to correspond to vo in the case of the reference characteristic. Once vo is determined, the temperature T can be determined using the relationship shown in FIG. 7, as in the first embodiment, and appropriate head temperature control can be performed.

FIG. 11 shows the above processing procedure according to this example. In this example, between steps s13 and S15 in the procedure shown in FIG. Step 514B) is inserted.

(Embodiment 3) An embodiment in which the resistor sensor 42 shown in FIGS. 3(^) and 3(B) is used as a temperature sensor will be described.

As shown in FIG. 12, the resistive sensor exhibits a characteristic in which the resistance value increases as the temperature rises, but in this case as well, there are variations in the characteristic as in the case of a diode. The relationship between temperature T and resistance value R is R(T) = Ro+α・Ro (T−To)・Ro(1
◆α' (T-To) ) = (10
), where 80 is the resistance value [Ω] at 25°C, To is 25 [t], and α is the temperature coefficient [Ω] specific to this resistor.
1/l], the detection output v0 is Vo"Cl"A4oR(T)" from equation (2).
” (11). In this case as well, by following the same procedure as in Example 1, first use a reference resistance with a resistance value R0, which is the standard value of this sensor, as a substitute for the sensor, and then set vo to A. /D conversion, the circuit-specific constant C1
is calculated and stored in the nonvolatile memory 55.

In addition, even in this example, 2
Assuming that the deviation from the standard value R0 at 5° C. is “,” information can be provided by using the same means as in FIG. 1θ, for example.

By doing this, equation (10) becomes R' (T) - (Ro''
r)” (1+ a ・(Ding-To))
−(12). Therefore, when a sensor with the characteristic R' is used, the detection output Vo (R'
) is V(R')-C, ◆^i, R' (T)-C, ◆A
10 ((RO order r) (1-a To)◆a T (R
,◆“))−C2+＾io a T (R,+r)
= (13), °, (where C2-Cl
+^to (Ro◆r) (1-a To)), and it becomes possible to obtain the temperature T using the same procedure as in FIG. 11 and perform appropriate temperature control.

(Example 4) The environmental condition may be, for example, humidity, which affects the viscosity of the ink. In this case, for example, a humidity sensor may be provided in place of the temperature sensor in FIG. 5, and the temperature may be adjusted using the same configuration and control as described above.

Further, different types of sensors may be used in combination.

(Others) When the present invention is applied to an inkjet recording device, it brings about excellent effects particularly in a bubble jet type recording head and a recording lid. This is because such a method uses thermal energy as energy for recording, and therefore, control is performed in accordance with environmental conditions (temperature) in consideration of the heat generated.

As for typical configurations and principles thereof, it is preferable to use the basic principles disclosed in, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740,796. This method can be applied to both the so-called on-demand type and continuous type, but especially in the case of the on-demand type, it is necessary to arrange the liquid (ink) in accordance with the sheet and liquid path that hold it. The electrothermal converter that is
Generating thermal energy in the electrothermal transducer and producing film boiling on the thermally active surface of the recording head by applying at least one drive signal that corresponds to recorded information and provides a rapid temperature rise above nucleate boiling. As a result, bubbles in the liquid (ink) can be formed in a one-to-one correspondence with this drive signal, which is effective. The growth and contraction of the bubble causes liquid (ink) to be ejected through the ejection opening to form at least one droplet. If this drive signal is in the form of a pulse, bubble growth and contraction will occur immediately and appropriately.
Particularly responsive liquid (ink) ejection can be achieved,
More preferable pulse-shaped drive signals include those described in U.S. Pat. Nos. 4,463,359 and 4,345,262.
However, if the conditions described in U.S. Pat. No. 4,313,124 of the invention concerning the temperature increase rate of the heat-acting surface are adopted, an even better record can be obtained. It can be performed.

The configuration of the recording head includes, in addition to the combination configuration of five ejection ports and electrothermal converters (straight liquid flow path or right-angled liquid flow path) as disclosed in the above-mentioned specifications, a heat acting section. The present invention also includes configurations using US Pat. No. 4,558,333 and US Pat. No. 4,459,600, which disclose configurations in which the wafer is placed in a bending region. In addition, Japanese Patent Application Laid-Open No. 1989-5 discloses a configuration in which a common slit is used as a discharge part of a plurality of electrothermal converters.
Publication No. 9-123+i70 and Japanese Patent Laid-Open No. 5 (1973) disclosing a configuration in which an opening for absorbing pressure waves of thermal energy corresponds to a discharge part.
The effects of the present invention are also effective even with a configuration based on Publication No. 9-138451. In other words, regardless of the form of the recording head, recording can be performed reliably and efficiently.

In general, the present invention can be effectively applied to a full-line type recording head having a length corresponding to the maximum width of a recording medium that can be recorded by a recording apparatus.

Such a recording head may have a configuration in which a groove is added to the length by a combination of multiple recording heads, or a configuration as a single recording head formed integrally. Even if it is a serial type, it is a replaceable chip type recording head that is attached to the device body and enables electrical connection with the device body and ink supply from the device body, or the recording head itself. The present invention is also effective when an integrally provided cartridge type recording head is used.

In addition, regarding the type and number of recording heads installed, for example, in addition to one type that corresponds to single-color ink, there is also a plurality of recording heads that correspond to multiple inks with different recording colors and densities. It is okay to have something available.

In addition, the recording device of the present invention may take the form of a copying device combined with a reader, etc., or a facsimile device having transmitting and receiving functions, in addition to being used as an image output terminal for information processing equipment such as a computer. It may be.

Furthermore, the recording devices to which the temperature adjustment device of the present invention is applicable include not only the above-mentioned inkjet recording devices, but also other types of inkjet recording devices, and even thermal printers and other types of recording devices. good.

[Effects of the Invention] As explained above, according to the present invention, a reference value is set in advance as the detection element output, and the detection system output at that time or the result of performing a predetermined calculation using this is stored in the storage means. By storing the information in memory, when adjusting the temperature of the recording head depending on the environmental conditions, the error of the detection system used is corrected based on the stored contents, so the rated error of the detection element and It is possible to obtain highly accurate measurement results without adjusting the output voltage level for offset voltage of the amplifier circuit, etc., and the number of adjustment items in the production process can be reduced.

Furthermore, in the case where the detection element section is included inside a consumable item, maintenance such as level adjustment is not required when replacing the consumable item in the market.

Since the temperature adjustment device of the present invention automatically adjusts the head temperature for each head during driving,
Variations in density, ink ejection speed, and ink droplet landing points are extremely reduced, making it possible to form good images.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the configuration of an inkjet printing apparatus as a printing apparatus to which the present invention can be applied, Fig. 2 is a perspective view showing an example of the structure of its print head, and Figs. 3 (^) and (B). 3(C) and 3(C) are respectively a plan view and a partially enlarged view showing a configuration example of a heater board that can be used in the recording head shown in FIG.
) and (B), a diagram for explaining the temperature characteristics of a diode that can be used as a temperature sensor, FIG. 4 is a block diagram showing a schematic configuration example of the control system of the recording device shown in FIG. 1, and FIG. FIG. 4 is a circuit diagram showing an embodiment of the present invention applied to the configuration shown in FIG. 6; FIG. 6 is a flowchart showing an example of a correction data detection procedure using the configuration shown in FIG. 5; FIG. 8 is a flowchart showing an example of temperature measurement or temperature control procedure using the configuration shown in FIG. 5; FIG. 9 is a diagram illustrating variations in temperature characteristics of sensors; FIG. An explanatory diagram showing a configuration example of a means that can be used to identify variations in sensors, Fig. 11 is a flowchart showing an example of a temperature measurement or temperature control procedure that takes sensor variations into consideration, and Fig. 12 shows a temperature sensor. FIG. 13 is a circuit diagram showing a conventional environmental condition measuring device, and FIG. 14 is a diagram explaining its operation. 9^, 98.9G, 9D...recording head, 41...
Heater board, 42... Temperature sensor, 48... Heat retention heater, 51.53... Amplifier, 52... Analog switch, 54^... CPt1. 55...Nonvolatile memory. 10 00 letters 2. Wheat [°C] Fig. 3 (C) 0 0 Fig. 3 (A) 4 4 Fig. 7 Fig. 1 O Fig. 9 Fig. 11 Fig. 20 0 0 0 ℃ - Kubo ° - ¥ Onmugi Pi C] 12 Figure 13

Claims (1)

[Claims] 1) A recording head used for ejecting ink from an ejection port in response to a predetermined input signal to form a desired image on a recording medium, and for controlling the driving of the recording head. and a detection system including a detection element for detecting environmental conditions of the recording apparatus, and a detection system output value for a reference detection element output or a predetermined calculation performed thereon. What is claimed is: 1. A recording apparatus comprising: a temperature adjusting means for the recording head, the recording head having a storage means for storing the results of the recording, and a correction means for correcting an error in the detection system based on the stored contents. 2) The recording head has an electrothermal conversion element as an ejection energy generating element for ejecting ink, and ejects ink droplets using the thermal energy generated by the electrothermal conversion element. The recording device according to claim 1. 3) a detection system including a detection element for detecting the environmental conditions of the recording device; a storage means for storing the detection system output value or the result of performing a predetermined operation on the output value of the detection system with respect to the reference detection element output; A temperature adjustment device comprising: a correction means for correcting errors in the detection system based on stored contents. 4) The temperature adjustment device according to claim 3, wherein the recording device is an inkjet recording device, and the detection element has the form of a temperature sensor disposed in a recording head of the inkjet recording device. 5) The temperature adjustment device according to claim 3, wherein the storage means has a form of non-volatile memory. 6) The detection element includes at least the detection element and an amplifier circuit for amplifying its output, and the correction means corrects the output of the amplifier circuit with the stored content of the nonvolatile memory. Temperature adjustment device described in. 7) The temperature adjustment device according to claim 3, further comprising means for providing information regarding the characteristics of the detection element.