CN108020279B - Liquid drop supply failure detection device, detection method and calculation device - Google Patents

Abstract

The present application discloses a detection device, a detection method and a computing device for poor droplet supply, which are used to realize the automation of detection of poor droplet supply in inkjet printing technology, and improve the detection speed and detection accuracy of detection of poor droplet supply. Thus, the reliability of the droplet supply device is improved. The device for detecting poor supply of droplets provided by the present application includes: a droplet receiving structure and a droplet measuring device; wherein, the droplet receiving structure is used to receive droplets; the droplet measuring device is used to determine that the droplet is carried The resistance value of the droplet receiving structure.

Description

A detection device, detection method and calculation device for poor droplet supply

technical field

The present application relates to the field of automatic detection, and in particular, to a detection device, a detection method and a computing device for poor droplet supply.

Background technique

At present, in the manufacturing process of display devices, inkjet printing technology is an important development direction. During the inkjet printing process, the size and position of the droplets supplied by the droplet supply equipment (such as nozzles) change, which affects the inkjet printing process. Both the accuracy and uniformity of the printing will affect the quality of the film formed by the droplets.

In the prior art, the detection of poor droplet supply usually uses inkjet printing on an object with each nozzle, and then uses a camera to photograph the object to obtain an image of the droplet, and then determine the size of the droplet in the image. and position for image analysis, and this detection method relies on manual or machine visual recognition, the detection speed is low, and the detection accuracy is not high.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a detection device, a detection method, and a computing device for poor droplet supply, which are used to automate the detection of poor droplet supply in inkjet printing technology, and improve the detection speed and detection of poor droplet supply. accuracy, thereby improving the reliability of the droplet supply equipment.

A droplet supply failure detection device provided by an embodiment of the present application includes: a droplet receiving structure and a droplet measuring device; wherein,

the droplet receiving structure is used for receiving droplets;

The droplet measuring device is used to determine the resistance value of the droplet receiving structure carrying the droplets.

The above-mentioned droplet supply failure detection device provided by the embodiment of the present application, by using the droplet receiving structure to receive the droplets, and then using the droplet measuring device to detect the resistance value of the droplet receiving structure carrying the droplets, the inkjet printing is realized. The automation of the detection of poor droplet supply in the technology improves the detection speed and detection accuracy of the detection of poor droplet supply, thereby improving the reliability of the droplet supply equipment.

Optionally, in the above-mentioned detection device for poor droplet supply provided by the embodiment of the present application, two ends of the droplet receiving structure are respectively provided with measurement points, and the droplet measurement device communicates with the droplet through the measurement points. Structural electrical connections.

Optionally, in the above detection device for poor droplet supply provided by the embodiment of the present application, the droplet receiving structure is a structure with an uneven surface.

The above-mentioned droplet supply failure detection device provided by the embodiments of the present application uses a droplet receiving structure with an uneven surface to receive droplets. Since the thickness of the droplet receiving structure is uneven, the droplets falling on the droplet receiving structure are not uniform. At different positions, the resistance values of the droplet receiving structures corresponding to the positions are also different, thereby increasing the variation of the resistance value of the droplet receiving structures carrying different droplets, and further making the droplet supply failure detection device to the said droplet. The detection of resistance is more sensitive.

Optionally, in the above-mentioned droplet supply failure detection device provided in the embodiment of the present application, the droplet supply failure detection device includes a plurality of droplet receiving structures, and between the plurality of droplet receiving structures is provided with The droplet receiving structures are insulated from each other.

Optionally, in the above-mentioned droplet supply failure detection device provided in the embodiment of the present application, a droplet measuring device is provided under each droplet receiving structure, or the droplet measuring device is connected by a movable connection. A line is connected to a droplet receiving structure to be measured among the plurality of droplet receiving structures.

Optionally, in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the resistance of the droplet is smaller than the resistance of the droplet receiving structure.

Optionally, in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the droplet measurement device includes: a data processing module and a data storage module; wherein,

The data processing module is used to determine the resistance value of the droplet receiving structure carrying the droplet, compare the determined resistance value with a preset standard resistance value, and output the comparison result to the data storage module;

The data storage module is used for storing the preset standard resistance value, and receiving and saving the comparison result output by the data processing module.

Optionally, the above-mentioned droplet supply failure detection device provided by the embodiment of the present application further includes: a power supply module connected in series with the droplet receiving structure and the droplet measuring device, and a power supply control module connected with the power supply module, When the resistance value is greater than a preset threshold, the power supply module is controlled to increase the output voltage, so that the measurement signal of the droplet measuring device for the resistance value of the droplet receiving structure carrying the droplet increases.

The above-mentioned droplet supply failure detection device provided by the embodiment of the present application uses the power control module to control the power module to increase the input voltage across the resistor when the resistance value is too large, causing the resistance measurement signal to be too small to be easily detected. Therefore, the measurement signal of the resistance is amplified, and the detection accuracy of the device for detecting poor supply of droplets is improved.

Correspondingly, the embodiments of the present application provide a method for detecting poor droplet supply, the method comprising:

acquiring a resistance measurement signal of the droplet receiving structure carrying the droplet;

determining the resistance value of the droplet receiving structure carrying the droplet according to the measurement signal;

Comparing the determined resistance value with a preset standard resistance value, a comparison result is obtained; wherein, the resistance of the droplet receiving structure carrying the droplet includes: a first resistor R1 connected in series with the droplet, The second resistor R2 connected in series, the third resistor R3 connected in parallel with the droplet, and the resistor R4 of the droplet;

The calculation of the resistance value of the droplet receiving structure carrying the droplets according to the measurement signal is specifically calculated according to the following formula:

Resistance value of drop-receiving structure carrying droplets

Correspondingly, an embodiment of the present application provides a computing device, including:

memory for storing program instructions;

The processor is used for calling the program instructions stored in the memory, and executes according to the obtained program:

obtaining the resistance measurement signal of the droplet receiving structure carrying the droplet;

determining the resistance value of the droplet receiving structure carrying the droplet according to the measurement signal;

The determined resistance value is compared with the preset standard resistance value to obtain the comparison result.

Description of drawings

FIG. 1 is one of the structural schematic diagrams of a droplet supply failure detection device provided in an embodiment of the present application in a single droplet receiving structure;

Figure 2 is a schematic diagram of various states of droplets falling on the droplet receiving structure;

FIG. 3 is the second schematic structural diagram of a droplet supply failure detection device provided in an embodiment of the present application in a single droplet receiving structure;

4 is a schematic diagram of a resistance structure of a device for detecting poor droplet supply provided by an embodiment of the present application;

5 is an equivalent circuit diagram of a resistance structure of a device for detecting poor droplet supply provided by an embodiment of the present application;

6 is a schematic diagram comparing the resistance structures of different droplets of a device for detecting poor droplet supply provided by an embodiment of the present application;

7 is a schematic structural diagram (top view) of a droplet supply failure detection device provided in an embodiment of the present application when multiple droplet receiving structures are used;

8 is one of the schematic diagrams (top view) of the connection of the droplet measuring device when the droplet supply failure detection device provided by the embodiment of the present application is in a plurality of droplet receiving structures;

9 is the second schematic diagram (top view) of the connection of the droplet measuring device when the droplet supply failure detection device provided by the embodiment of the present application is in a plurality of droplet receiving structures;

10 is a schematic diagram of a specific structure of a droplet measuring device of a device for detecting poor droplet supply provided by an embodiment of the present application;

11 is a flowchart of a method for detecting poor droplet supply provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a computing device according to an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The shapes and sizes of the components in the drawings do not reflect the actual scale, and are only intended to illustrate the content of the present application.

As shown in FIG. 1 , a device for detecting poor droplet supply provided by an embodiment of the present application includes: a droplet receiving structure 01 and a droplet measuring device 02 ; After being ejected, the droplets 12 are dropped onto the droplet receiving structure 01; wherein,

The droplet receiving structure 01 is used for receiving droplets 12;

The droplet measuring device 02 is used to determine the resistance value of the droplet receiving structure 01 carrying the droplets 12 .

As shown in FIG. 2 , when the droplet supply device 11 is working normally, the droplet 12 is dropped onto the droplet receiving structure 01 as shown in (1) in FIG. 2 . At this time, the standard droplet 12 is carried. The resistance value of the droplet receiving structure 01 is the standard resistance value; when the droplet supply is poor, the droplet 12 drops on the droplet receiving structure 01. Compared with (1), the size, position, etc. of the droplet will occur. For example, as shown in (2) in FIG. 2, the position of the droplet 12 is shifted; as shown in (3) in FIG. 2, the size of the droplet 12 becomes smaller; as shown in (4) in FIG. 2, The droplets 12 are fragmented and the like. When the droplet 12 has one or more abnormal conditions as shown in (2), (3) and (4) in FIG. 2 , the resistance value of the droplet receiving structure 01 carrying the abnormal droplet 12 will change. The above-mentioned droplet supply failure detection device provided by the embodiment of the present application uses the droplet receiving structure 01 to receive the droplets 12, and then uses the droplet measuring device 02 to detect the resistance value of the droplet receiving structure 01 carrying the droplets 12, The automatic detection of droplet supply failure in the inkjet printing technology is realized, the detection speed and detection accuracy of the droplet supply failure detection are improved, and the reliability of the droplet supply device is improved.

Further, in the specific implementation, as shown in FIG. 3 , in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the two ends of the droplet receiving structure 01 are respectively provided with measurement points, that is, in the figure, the measurement points are located in the liquid droplet receiving structure 01 . The first measurement point A at the front end of the droplet receiving structure 01 and the second measurement point B at the rear end of the droplet receiving structure 01, the droplet measuring device 02 passes the first measurement point A and the second measurement point B and the The droplet receiving structure 01 is electrically connected to measure the resistance value of the droplet receiving structure 01 carrying the droplet 12 .

Further, in specific implementation, in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the droplet receiving structure 01 may be, for example, a structure with an uneven surface, for example, as shown in FIG. The surface opposite to the surface for receiving the droplet 12 is a slope-shaped structure of a slope. Of course, it can also be a structure of other shapes, which can be specifically designed according to actual needs, which is not limited here.

In the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the droplet receiving structure 01 with the uneven surface is used to receive the droplet 12. Since the thickness of the droplet receiving structure 01 is not uniform, the droplet 12 drops on the liquid droplet 12. At different positions on the droplet receiving structure 01, the resistance value of the droplet receiving structure 01 under the corresponding position is also different, thereby increasing the variation of the resistance value of the droplet receiving structure 01 carrying different droplets 12, In addition, the detection device for poor droplet supply is more sensitive to the detection of the resistance.

Specifically, as shown in FIG. 4 , in a detection device for poor droplet supply provided by an embodiment of the present application, the resistance of the droplet receiving structure 01 carrying the droplets 12 may include, for example, the resistance of the droplet receiving structure 01 . , and the resistance R4 of the droplet 12; wherein, the resistance of the droplet receiving structure 01 can be divided into three parts: the droplet receiving structure from the first measurement point A on the droplet receiving structure 01 to the front end C of the droplet 12. The first resistance R1 of the structure 01, the second resistance R2 of the droplet receiving structure 01 between the second measurement point B on the droplet receiving structure 01 and the rear end D of the droplet 12, between the droplet 12 and the droplet receiving The third resistance R3 of the droplet receiving structure 01 under the contact surface of the structure 01; as shown in FIG. In a series relationship, the third resistor R3 and the resistor R4 of the droplet 12 are in a parallel relationship; 02 in FIG. 4 is a droplet measuring device, and 03 is an insulating structure.

图中A为液滴接收结构01上的第一测量点A，B为液滴接收结构01上的第二测量点B，02为液滴测量装置，液滴测量装置02通过第一测量点A及第二测量点B测量总电阻R，通过检测总电阻R的变化量，来检测液滴供给是否不良。Further, in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the equivalent circuit diagram of the above-mentioned first resistor R1 , second resistor R2 , third resistor R3 and resistor R4 of droplet 12 is shown in FIG. 5 . , then the total resistance of the droplet receiving structure 01 carrying the droplet 12

In the figure, A is the first measuring point A on the droplet receiving structure 01, B is the second measuring point B on the droplet receiving structure 01, and 02 is the droplet measuring device, and the droplet measuring device 02 passes through the first measuring point A And the second measurement point B measures the total resistance R, and detects whether the droplet supply is poor by detecting the amount of change in the total resistance R.

当液滴供给不良时，滴落到液滴接收结构01上的液滴12发生位置偏移，例如如图6所示，液滴12的位置偏左，由于液滴接收结构01的表面不平坦，为斜坡形状，液滴接收结构01的每一部分的厚度都不相同，因此液滴滴落位置发生偏移后，液滴接收结构01与液滴相接触的接触面之下的液滴接收结构01的厚度不同，对应的的液滴接收结构01的电阻值也不同，即此部分电阻由偏移前的R3’变为R3；液滴接收结构01上的第一测量点A到液滴的前端的距离不同，对应的液滴接收结构01的电阻值也不同，即此部分电阻由偏移前的R1’变为R1；液滴接收结构01上的第二测量点B到液滴的后端的距离也不同，对应的的液滴接收结构01的电阻值也不同，即此部分电阻由偏移前的R2’变为R2，因此承载着偏移后的液滴12的液滴接收结构01的电阻R的电阻值与承载着标准液滴12’的液滴接收结构01的电阻R’的电阻值也不同，则根据上述可知，从液滴接收结构01上的第一测量点A到偏移后的液滴12的前端C之间的液滴接收结构01的电阻为第一电阻R1、从液滴接收结构01上第二测量点B到偏移后的液滴12的后端D之间的液滴接收结构01的电阻为第二电阻R2、在偏移后的液滴12与液滴接收结构01的接触面之下的液滴接收结构01的电阻为第三电阻R3，偏移后的液滴12的电阻为R4，则液滴供给不良的情况下，承载有偏移后的液滴12的液滴接收结构01的电阻

通过液滴测量装置02比较R与R’的差值是否在允许误差范围内，可以确定液滴供给是否不良。当然，电阻R也可以通过其他方式计算，具体可根据需要设计，在此不作限定。Specifically, as shown in FIG. 6 , for example, when the droplet supply device is working normally, the standard droplet that drops onto the droplet receiving structure 01 is 12', and at this time, the droplet carrying the standard droplet 12' receives The resistance value of the structure 01 is the standard resistance value R', and correspondingly, the resistance of the droplet receiving structure 01 between the first measurement point A on the droplet receiving structure 01 and the front end C' of the standard droplet 12' is the first A standard resistance R1', the resistance of the droplet receiving structure 01 from the second measurement point B on the droplet receiving structure 01 to the rear end D' of the standard droplet 12' is the second standard resistance R2', which is The resistance of the droplet receiving structure 01 under the contact surface of the droplet 12' and the droplet receiving structure 01 is the third standard resistance R3', and the resistance of the standard droplet 12' is R4', then in the standard state, the standard resistance value

When the droplet supply is poor, the position of the droplet 12 dropped on the droplet receiving structure 01 is shifted, for example, as shown in FIG. , is a slope shape, the thickness of each part of the droplet receiving structure 01 is different, so after the droplet dropping position is shifted, the droplet receiving structure 01 below the contact surface where the droplet receiving structure 01 contacts with the droplet The thickness of 01 is different, and the resistance value of the corresponding droplet receiving structure 01 is also different, that is, the resistance of this part changes from R3' before the offset to R3; the first measurement point A on the droplet receiving structure 01 to the droplet The distance of the front end is different, and the resistance value of the corresponding droplet receiving structure 01 is also different, that is, the resistance of this part changes from R1' before the offset to R1; the second measurement point B on the droplet receiving structure 01 to the back of the droplet The distance between the ends is also different, and the resistance value of the corresponding droplet receiving structure 01 is also different, that is, the resistance of this part is changed from R2' before the offset to R2, so the droplet receiving structure 01 that carries the offset droplet 12 The resistance value of the resistance R is also different from the resistance value of the resistance R' of the drop receiving structure 01 carrying the standard drop The resistance of the droplet receiving structure 01 between the front ends C of the shifted droplets 12 is the first resistance R1, between the second measurement point B on the droplet receiving structure 01 and the rear end D of the shifted droplet 12. The resistance of the droplet receiving structure 01 between is the second resistance R2, the resistance of the droplet receiving structure 01 under the contact surface of the offset droplet 12 and the droplet receiving structure 01 is the third resistance R3, the offset The resistance of the subsequent droplet 12 is R4, and the resistance of the droplet receiving structure 01 carrying the shifted droplet 12 in the case of poor droplet supply

Whether the droplet supply is poor can be determined by comparing whether the difference between R and R′ is within the allowable error range by the droplet measuring device 02 . Of course, the resistance R can also be calculated in other ways, which can be specifically designed as required, which is not limited here.

Further, in a specific implementation, as shown in FIG. 7 , in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the droplet supply failure detection device includes a plurality of droplet receiving structures 01 , which is an embodiment of the present application. The above-mentioned droplet supply failure measuring device provided can detect whether one droplet is poorly supplied, and can also detect whether a plurality of droplets are poorly supplied, as long as each droplet receiving device 01 is provided with a first detection amount A and a second detection amount A. Measure point B.

Further, during specific implementation, as shown in FIG. 7 , in the above-mentioned droplet supply failure detection device provided in the embodiment of the present application, when the droplet supply failure detection device includes a plurality of droplet receiving structures 01, the The detection device for poor droplet supply further includes: an insulating structure 03 for insulating each of the droplet receiving structures 01 from each other, so as to prevent the resistances between the droplet receiving structures 01 from influencing each other, thereby affecting the detection result. accuracy.

It should be noted that FIG. 7 is a top view of the droplet supply failure detection device in a direction perpendicular to the droplet receiving structure 01 , wherein the shape of the droplet receiving structure 01 is not limited to the circle shown in the figure , it can also be a rectangle, a rhombus, etc., as long as it conforms to the principles of the application, it is feasible, and the circle is only used as an example for illustration, and the application is not limited.

Further, during specific implementation, in the above-mentioned droplet supply failure detection device provided by the embodiments of the present application, when the droplet supply failure detection device includes a plurality of droplet receiving structures 01, the droplet measurement device 02 The electrical resistance of a plurality of drop receiving structures 01 receiving droplets 12 can be measured in a number of ways.

Examples are given below.

Embodiment 1.

Referring to FIG. 8 , in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, a droplet measuring device 02 is provided under each droplet receiving structure 01 , that is, the droplet receiving structure 01 and the droplet measuring device The devices 02 are in one-to-one correspondence, a first measurement point A and a second measurement point B are set on each droplet receiving structure 01, and the droplet measuring device 02 under each droplet receiving structure 01 passes through the droplet measuring device 02 The corresponding first measurement point A and the second measurement point B are electrically connected to the droplet receiving structure 01 for measuring the resistance value of the droplet receiving structure 01 corresponding to the droplet measuring device 02 receiving the droplet 12 . 03 is an insulating structure.

It should be noted that FIG. 8 is a top view of the droplet supply failure detection device in a direction perpendicular to the droplet receiving structure 01 , wherein the shape of the droplet receiving structure 01 is not limited to the circle shown in the figure , it can also be a rectangle, a rhombus, etc., as long as it conforms to the principles of the application, it is feasible, and the circle is only used as an example for illustration, and the application is not limited.

Embodiment two,

Referring to FIG. 9 , in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the droplet measuring device 02 can be connected to the plurality of droplet receiving structures 01 through a movable connecting line, such as a DuPont line, etc. The droplet receiving structure 01 to be detected is connected, that is, the droplet measuring device 02 and the droplet receiving structure 01 are measured in an active connection manner. Specifically, a first measurement point A and a second measurement point B are set on each droplet receiving structure 01, the droplet measuring device 02 is first connected to the first droplet receiving device 01 (black solid line in the figure), A droplet receiving device 01 is measured. After the measurement is completed, the connection point between the droplet measuring device 02 and the first droplet receiving device 01 is removed, and then connected to the second droplet receiving device 01 (black dotted line in the figure) , measure the second droplet receiving device 01, after the measurement is completed, remove the connection point between the droplet measuring device 02 and the second droplet receiving device 01... and so on, the droplet measuring device 02 is connected to a plurality of The droplet receiving structures 01 to be measured in the droplet receiving structures 01 are connected, and the measurement of all the droplet receiving structures 01 is completed in sequence. 03 is an insulating structure.

It should be noted that FIG. 9 is a top view of the droplet supply failure detection device in a direction perpendicular to the droplet receiving structure 01 , wherein the shape of the droplet receiving structure 01 is not limited to the circle shown in the figure , it can also be a rectangle, a rhombus, etc., as long as it conforms to the principles of the application, it is feasible, and the circle is only used as an example for illustration, and the application is not limited.

Further, in specific implementation, in the above-mentioned droplet supply failure detection device provided in the embodiment of the present application, the materials of the droplet 12 and the droplet receiving structure 01 may be a combination of various materials, for example, the material of the droplet 12 is made of The resistance is slightly smaller than the resistance of the material for making the droplet receiving structure 01, so that when the state of the droplet 12 dropping on the droplet receiving structure 01 is different, the resistance value of the droplet receiving structure 01 carrying the droplet 12 changes more. Obviously, of course, the resistance of the material for making the droplet 12 can also be similar to the resistance of the material for making the droplet receiving structure 01, or the resistance of the material for making the droplet 12 is slightly larger than that of the material for making the droplet receiving structure 01, etc., as long as it is not Affecting the principle of the present application, the material for making the droplet 12 and the material for making the droplet receiving structure 01 can be arbitrarily selected, which is not limited herein.

Further, as shown in FIG. 10 , during specific implementation, in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the droplet measurement device 02 includes: a data processing module 021 and a data storage module 022 ; wherein,

The data processing module 021 is used to determine the resistance value of the droplet receiving structure 01 carrying the droplet 12, compare the determined resistance value with a preset standard resistance value, and output the comparison result to the data storage module 022;

The data storage module 022 is used for storing the preset standard resistance value, and receiving and saving the comparison result output by the data processing module 021 .

Specifically, a preset standard resistance value is stored in the data storage module 022, and the standard resistance value is when the droplet supplying device is working normally, after the droplet 12 drops on the droplet receiving device 01, the droplet measuring device The standard resistance value of the resistance of the droplet receiving device 01 receiving the droplet 12 measured by the data processing module 021 in 02 is stored in the data storage module 022 as a standard reference for comparison; When the droplet supply failure is detected, the droplet measuring device 02 is connected to the droplet receiving structure 01, and the data processing module 021 in the droplet measuring device 02 measures the resistance value of the droplet receiving structure 01 carrying the droplet 12, and calculates the resistance value of the droplet receiving structure 01 carrying the droplet 12. The resistance value is compared with the standard resistance value pre-stored in the data storage module 022 to determine whether the droplet supply is poor, and then the comparison result of each droplet receiving structure 01 is stored in the data storage module 022 .

Further, as shown in FIG. 10 , during specific implementation, in the above-mentioned droplet supply failure detection device provided by the embodiment of the present application, the droplet measuring device 02 further includes: a droplet receiving structure and a droplet measuring device. The power supply module 023 is connected in series.

Further, as shown in FIG. 10 , in the specific implementation, the above-mentioned droplet supply failure detection device provided by the embodiment of the present application further includes: a power control module 024 , in some cases, the receiving liquid includes the liquid droplet 12 The resistance of the droplet receiving structure 01 may be very large. In the case that the voltage output is not high enough, the measurement signal of the resistance obtained by the droplet measuring device 02 is very small, which is not easy to measure, and affects the accuracy of the measurement results. Therefore, , in the case of a certain voltage, set a threshold value for the resistance to be measured, when the resistance value of the droplet receiving structure 01 receiving the liquid droplets 12 is greater than the preset threshold value, the voltage control module 024 controls the power module 023 to increase voltage, so that the measurement signal of the droplet measuring device to the resistance value of the droplet receiving structure carrying the droplet increases, thereby making the measurement result more accurate. The set resistance value of the droplet receiving structure 01 receiving the liquid droplet 12 is 500Ω, and the corresponding minimum measurement signal is 0.024A. When the resistance value of the droplet receiving structure 01 receiving the liquid droplet 12 is greater than the preset threshold value When 500Ω, the power control module 024 controls the power module 023 to increase the voltage across the resistor of the droplet receiving structure 01 that receives the droplet 12 in the input liquid. Measure the signal and improve the accuracy of the measurement result.

The above-mentioned droplet supply failure detection device provided by the embodiment of the present application uses the power control module 024 to control the power module 023 to increase the input voltage at both ends of the resistor when the resistance value is too large and the measurement signal of the resistance is too small to be easily detected. voltage, thereby amplifying the measurement signal of the resistance, and improving the detection accuracy of the device for detecting poor supply of droplets.

Further, as shown in FIG. 10 , during specific implementation, the above-mentioned droplet supply poor detection device provided by the embodiment of the present application further includes: a prompt module 025 , and the data processing module 021 compares the determined resistance value with the preset resistance value. The standard resistance value is compared, that is, the difference between the determined resistance value and the preset standard resistance value is calculated, and the difference value is compared with the preset error range. When it is determined that the difference value is greater than the preset error range, a prompt The module 025 outputs the alarm information. Specifically, the prompting module 025 can set the prompting method according to the needs. For example, a prompt light can be installed for each droplet receiving structure 01. When the droplet receiving structure 01 appears droplet supply When it is defective, the prompting light on the droplet receiving structure 01 will be on. Of course, other methods can also be used to prompt, such as a buzzer, an image display device, etc., which are not limited here.

Further, in the specific implementation, in the above-mentioned droplet supply failure detection device provided in the embodiment of the present application, the droplet measuring device 02 can be, for example, an integrated chip, or can be made into an external printed circuit board. Of course, It is not limited to these two methods, and specific designs can be made according to requirements, which are not limited here.

Based on the same inventive concept, an embodiment of the present application provides a method for detecting poor droplet supply. As shown in FIG. 11 , the method includes:

Step 1011: Obtain the resistance measurement signal of the droplet receiving structure 01 carrying the droplet 12, and the droplet measuring device 02 measures the resistance of the droplet receiving structure 01 carrying the droplet 12 to obtain the resistance measurement signal;

计算出承载有液滴12的液滴接收结构01的电阻R的电阻值，其中，如图6所示，从液滴接收结构01上的第一测量点A到液滴12的前端C之间的液滴接收结构01的电阻为第一电阻R1、从液滴接收结构01上第二测量点B到液滴12的后端D之间的液滴接收结构01的电阻为第二电阻R2、在液滴12与液滴接收结构01的接触面之下的液滴接收结构01的电阻为第三电阻R3，液滴12的电阻为R4；Step 1012: Determine the resistance value of the droplet receiving structure 01 carrying the droplet 12 according to the measurement signal, and the data processing module 021 in the droplet measurement device 02 according to the calculation formula

The resistance value of the resistance R of the droplet receiving structure 01 carrying the droplet 12 is calculated, wherein, as shown in FIG. 6 , from the first measurement point A on the droplet receiving structure 01 to the front end C of the droplet 12 The resistance of the droplet receiving structure 01 is the first resistance R1, the resistance of the droplet receiving structure 01 from the second measurement point B on the droplet receiving structure 01 to the rear end D of the droplet 12 is the second resistance R2, The resistance of the droplet receiving structure 01 below the contact surface of the droplet 12 and the droplet receiving structure 01 is the third resistance R3, and the resistance of the droplet 12 is R4;

计算出承接有液滴的液滴接收装置01的电阻R’的电阻值，其中，如图6所示，从液滴接收结构01上的第一测量点A到标准液滴12’的前端C’之间的液滴接收结构01的电阻为第一标准电阻R1’、从液滴接收结构01上第二测量点B到标准液滴12’的后端D’之间的液滴接收结构01的电阻为第二标准电阻R2’、在标准液滴12’与液滴接收结构01的接触面之下的液滴接收结构01的电阻为第三标准电阻R3’，标准液滴12’的电阻为R4’；数据处理模块021通过计算R与R’的差值，确定所述差值是否大于预设的误差范围，若差值大于预设的误差范围，则确定该液滴接收结构01处出现液滴供给不良；保存所述确定的电阻值与预设的标准电阻值进行比较的比较结果，将比较结果存储在数据存储模块022中。Step 1013: Compare the determined resistance value R with a preset standard resistance value R'. Specifically, a preset standard resistance value R' is stored in the data storage module 022 of the droplet measurement device 02. The standard resistance value R' is that when the droplet supply equipment is working normally, after the droplet has dropped on the droplet receiving device 01, the droplet measuring device 02 will calculate according to the formula

Calculate the resistance value of the resistance R' of the droplet receiving device 01 receiving the droplet, wherein, as shown in FIG. 6, from the first measurement point A on the droplet receiving structure 01 to the front end C of the standard droplet 12' The resistance of the droplet receiving structure 01 between ' is the first standard resistance R1', the droplet receiving structure 01 between the second measurement point B on the droplet receiving structure 01 and the rear end D' of the standard droplet 12' The resistance is the second standard resistance R2', the resistance of the droplet receiving structure 01 under the contact surface of the standard droplet 12' and the droplet receiving structure 01 is the third standard resistance R3', the resistance of the standard droplet 12' is R4'; the data processing module 021 determines whether the difference is greater than the preset error range by calculating the difference between R and R', and if the difference is greater than the preset error range, determines the droplet receiving structure 01 Poor droplet supply occurs; save the comparison result of comparing the determined resistance value with the preset standard resistance value, and store the comparison result in the data storage module 022 .

Further, during specific implementation, in the above-mentioned method for detecting poor supply of droplets provided in the embodiments of the present application, the resistance of the droplet receiving structure carrying the droplets includes: a first resistor R1 connected in series with the droplets, and a second resistor R2 connected in series with the droplets, a third resistor R3 connected in parallel with the droplets, and a resistor R4 of the droplets;

The calculation of the resistance value of the droplet receiving structure carrying the droplets according to the measurement signal is specifically calculated according to the following formula:

Resistance value of drop-receiving structure carrying droplets

Based on the same inventive concept, referring to FIG. 12 , an embodiment of the present application provides a computing device, including:

a memory 121 for storing program instructions;

The processor 122 is configured to call the program instructions stored in the memory 121, and execute according to the obtained program:

obtaining the resistance measurement signal of the droplet receiving structure carrying the droplet;

determining the resistance value of the droplet receiving structure carrying the droplet according to the measurement signal;

The determined resistance value is compared with the preset standard resistance value to obtain the comparison result.

The processor 122 may be a central processor (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (Complex Programmable Logic). Device, CPLD).

The above-mentioned droplet supply failure detection device provided by the embodiment of the present application, by using the droplet receiving structure to receive the droplets, and then using the droplet measuring device to detect the resistance value of the droplet receiving structure carrying the droplets, the inkjet printing is realized. The automation of the detection of poor droplet supply in the technology improves the detection speed and detection accuracy of the detection of poor droplet supply, thereby improving the reliability of the droplet supply equipment.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (7)

1. A droplet supply failure detection device, comprising: a droplet receiving structure and a droplet measuring device; wherein, The droplet receiving structure is used for receiving droplets, and the droplet receiving structure is a structure with uneven thickness; The droplet measuring device is used to determine the resistance value of the droplet receiving structure carrying the droplets. 2 . The droplet supply failure detection device according to claim 1 , wherein measuring points are respectively provided at both ends of the droplet receiving structure, and the droplet measuring device passes through the measuring points and the liquid droplet measuring device. 3 . The drop receiving structure is electrically connected. 3 . The droplet supply failure detection device according to claim 1 , wherein the droplet supply failure detection device comprises a plurality of droplet receiving structures, and between the plurality of droplet receiving structures is provided a device for allowing the droplet to be supplied. 4 . Each of the droplet receiving structures are insulating structures that are insulated from each other. 4. The device for detecting poor supply of droplets according to claim 3, wherein one droplet measuring device is provided under each of the droplet receiving structures, or the droplet measuring device is movable by The connecting line is connected with the droplet receiving structure to be measured among the plurality of droplet receiving structures. 5. The droplet supply failure detection device according to claim 1, wherein the resistance of the droplet is smaller than the resistance of the droplet receiving structure. 6. The droplet supply failure detection device according to claim 1, wherein the droplet measurement device comprises: a data processing module and a data storage module; wherein, The data processing module is used to determine the resistance value of the droplet receiving structure carrying the droplet, compare the determined resistance value with a preset standard resistance value, and output the comparison result to the data storage module; The data storage module is used for storing the preset standard resistance value, and receiving and saving the comparison result output by the data processing module. 7. The device for detecting poor droplet supply according to claim 6, further comprising: a power supply module connected in series with the droplet receiving structure and the droplet measuring device, and a power supply control device connected with the power supply module The module is configured to control the power supply module to increase the output voltage when the resistance value is greater than a preset threshold value, so that the measurement signal of the droplet measuring device for the resistance value of the droplet receiving structure carrying the droplet increases. big.

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