CN113682060B

CN113682060B - Printing equipment, device and edge determining method of printing medium

Info

Publication number: CN113682060B
Application number: CN202110881753.8A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Xiamen Hanyin Electronic Technology Co Ltd
Current assignee: Xiamen Hanyin Co ltd
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2023-06-30
Anticipated expiration: 2039-05-22
Also published as: CN113682060A; CN110202960B; CN110202960A

Abstract

The invention discloses a printing device, which is provided with a controller, a feeding device, a thermal head and a detecting device, wherein the feeding device, the thermal head and the detecting device are respectively and electrically connected with the controller, and the controller comprises a memory and a processor; the detecting device comprises a first detecting unit and a second detecting unit, wherein the second detecting unit, the first detecting unit and the thermal head are sequentially arranged along the printing feeding direction; executable code is stored in the memory, the executable code being executable by the processor to implement the steps of: feeding a print medium tape; acquiring first edge information and slit width of the medium to be printed detected by the second detection unit so as to acquire first edge reference information; acquiring second edge information of the medium to be printed detected by the first detection unit; and obtaining the edge information of the medium to be printed according to the second edge information and the first edge reference information. The invention also discloses a printing device and a method for determining the edge of the printing medium.

Description

Printing equipment, device and edge determining method of printing medium

(the present application is directed to 201910431138. X. A division of a printing apparatus, device, and edge determination method of a printing medium)

Technical Field

The invention relates to the technical field of printing, in particular to printing equipment and a method for determining edges of printing media.

Background

At present, label printing equipment in the market positions the edge of a label by adopting a method of detecting by a photoelectric sensor, specifically, a preset fixed distance is reserved between a detection point of the photoelectric sensor and a printing point of a thermal head, after the photoelectric sensor detects the edge of the label firstly in the process of moving the label tape along the printing feeding direction, a motor rotates a fixed step number to drive the label tape to move forwards for a fixed distance, at the moment, the label to be printed is judged to be positioned at the preset position, and then the thermal head executes printing action on the label.

In the actual use process, when the label tapes with different thicknesses travel by a motor for a fixed step number, the actual moving distance is different due to different deformation generated by the rubber roller, and the longer the accumulated step number is, the larger the actual position deviation is. When the photosensor is far from the thermal head, the detected edge of the label will be shifted to the position of the print head. The carbon band is clamped between the thermal head and the tag, and has strong light absorption capacity, so that signal change is very weak, and the photoelectric sensor cannot be arranged at a position close to the thermal head.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a printing apparatus that achieves the purpose of accurately positioning edge information of a medium to be printed by detecting an edge position of the medium to be printed by a second detection unit far from a thermal head and correcting a step distance error by a first detection unit near the thermal head.

In a first aspect, the present invention provides a printing apparatus having a controller, a feeding device, a thermal head and a detection device electrically connected to the controller, respectively, the controller comprising a memory and a processor; the detection device comprises a first detection unit and a second detection unit, wherein the second detection unit, the first detection unit and the thermal head are sequentially arranged along the printing feeding direction; the memory stores executable code executable by the processor to implement the steps of: feeding a print medium tape; acquiring first edge information and slit width of the medium to be printed detected by the second detection unit so as to acquire first edge reference information; acquiring second edge information of the medium to be printed detected by the first detection unit; and obtaining the edge information of the medium to be printed according to the second edge information and the first edge reference information.

Preferably, the step of obtaining the second edge information of the medium to be printed detected by the first detecting unit includes: when the first detection unit detects the second edge information, recording a first voltage value detected by the first detection unit; and obtaining second edge information according to the first voltage value and the slit width.

Preferably, the acquiring the first edge information and the slit width of the medium to be printed detected by the second detecting unit to obtain the first edge reference information includes: acquiring first edge reference information according to the first edge information and preset feeding length information; the feeding length information is a feeding stroke from the second detection unit to the first detection unit.

Preferably, when the first detecting unit detects the second edge information, recording the first voltage value detected by the first detecting unit includes the following steps: when the second detecting unit detects the first edge information and the seam width, feeding a printing medium belt for a preset distance so that the front edge of the medium to be printed is positioned at a first distance behind the first detecting unit; when the front edge of the printing medium is judged to be positioned at a first distance behind the first detection unit, recording a first voltage value detected by the first detection unit; and obtaining second edge information according to the obtained first voltage value and the slit width.

Preferably, the obtaining the second edge information according to the obtained first voltage value and the slit width includes: obtaining a voltage sum according to the first voltage value and the slit width; obtaining a maximum voltage sum from the voltage sums; and obtaining second edge information according to the position of the maximum voltage sum.

Preferably, the obtaining the maximum voltage and the step according to the voltage comprises: comparing the magnitude of the front voltage sum and the rear voltage sum to obtain a larger voltage sum; feeding a printing medium belt by a preset distance so that the front edge of the medium to be printed is positioned at a second distance in front of the first detection unit; stopping comparing the voltage sum when the front edge of the medium to be printed is judged to be positioned at a second distance in front of the first detection unit so as to obtain the maximum voltage sum and the position of the maximum voltage; and deriving second edge information based on the position of the maximum voltage sum.

Preferably, the sum of one voltage is the sum of all first voltage values within one slit width length.

Preferably, the step of obtaining the printing edge information according to the second edge information and the first edge reference information includes: when the distance between the second edge information and the first edge reference information along the feeding direction is not larger than a preset threshold value, judging the second edge information as printing edge information; and when the distance between the second edge information and the first edge reference information along the feeding direction is larger than a preset threshold value, judging that the first edge information is the edge information of the printing medium.

Preferably, after the step of obtaining the edge information of the medium to be printed according to the second edge information and the first edge reference information, the method further comprises: feeding the edge information of the medium to be printed to a preset printing position; and sending an instruction to the thermal head to enable the thermal head to execute printing.

In a second aspect, the present invention further provides a method for determining an edge of a printing medium, including: acquiring first edge information and slit width of the medium to be printed detected by the second detection unit so as to acquire first edge reference information; acquiring second edge information of the medium to be printed detected by the first detection unit; the second detection unit, the first detection unit and the thermal head are sequentially arranged along the printing feeding direction; and obtaining the edge information of the medium to be printed according to the second edge information and the first edge reference information.

In a third aspect, an embodiment of the present invention provides a printing apparatus including: a feeding module for feeding a printing medium; the detecting module is used for detecting and acquiring voltage value information of the printing medium; a recording module for recording a feeding distance of the printing medium and for recording voltage value information; the calculation module calculates voltage and information according to the voltage value information; and the judging module is used for judging according to the voltage value information and the voltage sum information to acquire first edge information, second edge information and voltage sum information of the printing medium, and judging according to the first edge information, the second edge information and the voltage sum information to acquire the edge information of the printing medium.

In a fourth aspect, an embodiment of the present invention provides a computer readable storage medium, the computer readable storage medium including a stored computer program, wherein the computer program when run controls a device in which the computer readable storage medium is located to perform the method for determining an edge of a print medium in a printing device according to the second aspect.

By adopting the technical scheme, the invention can obtain the following technical effects:

the invention provides a printing device, which is provided with a second detection unit and a first detection unit in the feeding direction of a printing medium, wherein the second detection unit is used for detecting first edge information and seam width of the printing medium, the first detection unit is positioned between the second detection unit and a thermal head and is positioned closer to the thermal head and used for detecting second edge information of the printing medium.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 and 2 are flowcharts of a method of determining an edge of a printing medium according to the present invention.

Fig. 3 is a flowchart illustrating how to obtain the second edge information of the medium to be printed detected by the first detecting unit in step S200 in fig. 1.

Fig. 4 is a flowchart illustrating how to obtain the second edge information according to the obtained first voltage value and the slit width in step S230 in fig. 3.

Fig. 5 depicts a flow chart of how the maximum voltage sum is obtained from the voltage sums in step S232 in fig. 4.

Fig. 6 is a flowchart illustrating how to obtain edge information of a medium to be printed according to the second edge information and the first edge reference information in step 300 in fig. 1.

Fig. 7 is a schematic diagram of a print module according to the present invention.

Fig. 8 is a schematic diagram of the structure of the printing apparatus of the present invention.

Fig. 9 depicts a schematic structural view of a print medium tape.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "upper", "lower", "middle", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

The structure, function and advantageous effects of the solution of the present application will now be described in detail with reference to fig. 1 to 3.

First embodiment:

referring to fig. 8 and 9 in combination, a first embodiment of the present invention provides a printing apparatus, which includes a main frame (not shown), a controller, a feeding device, a detecting device, and a printing device, wherein the controller, the feeding device, the detecting device, and the printing device are disposed on the main frame. The feeding device, the detecting device and the printing device are respectively and electrically connected with the controller. The main frame has a paper feed passage, the controller includes a memory and a processor, and the printing device includes a thermal head 1, and a carbon tape 5 partially disposed between the paper feed passage and the thermal head 1. The detecting device comprises a first detecting unit 3 and a second detecting unit 4, and the second detecting unit 4, the first detecting unit 3 and the thermal head 1 are sequentially arranged along the printing feeding direction. The second detecting unit 4, the first detecting unit 3, and the thermal head 1 are disposed in order along the printing feed direction. Preferably, the paper feed roller 6, the detection device and the thermal head 1 are arranged in order along the feed direction.

Specifically, referring to fig. 8, the first detecting unit 3 and the second detecting unit 4 in the first embodiment are photo-sensors respectively, wherein the first detecting unit 3 includes a first light emitting component 31 and a first light receiving component 32 respectively disposed on two sides of the paper feeding path, and the second detecting unit 4 includes a second light emitting component 41 and a second light receiving component 42 respectively disposed on two sides of the paper feeding path. Wherein, a part of the carbon tape 5 is sandwiched between the first light emitting component 31 or the first light receiving component 32 and the paper feeding channel. It will be appreciated that in other embodiments, the carbon ribbon 5 may not be sandwiched between the first light emitting element 31 or the first light receiving element 32 and the paper feeding path.

Specifically, the first light receiving element 32 and the second light receiving element 42 of the present invention respectively receive the light emitted from the first light emitting element 31 and the second light emitting element 41, and convert the intensity of the received light into a voltage value, and determine the edge information of the medium 2A to be printed through the change of the voltage value.

In the related art, since the thermal head 1 transfers a print image onto a print medium through the carbon tape 5, the partially moving carbon tape 5 is sandwiched between the thermal head 1 and a position near the thermal head 1 and a paper feed path. Since the carbon ribbon 5 absorbs and reflects more light, the signal change of the photodetector is weak, and the edge of the printing medium is detected erroneously, that is, the edge of the printing medium cannot be detected accurately. The present printing apparatus mounts the photodetector at a position where there is no disturbance of the carbon ribbon 5. But in the case where the photodetector is installed at a position where there is no disturbance of the carbon ribbon 5, the photodetector is too far from the heating point of the thermal head 1. Under the condition that the thicknesses of the printing media are different, the paper feeding roller 6 can generate different deformation, and at the moment, when the motor in the feeding device drives the paper feeding roller 6 to move by a fixed step distance, the actual moving distance of the printing media can be different. Therefore, when the edge of the printing medium is detected by the photosensor, the edge of the printing medium is sent to the heating point position of the thermal head 1 by calculating the step of the motor rotation, and the deviation of the printing position is caused due to the deviation of the actual moving distance from the preset moving distance calculated by the motor rotation step.

In order to obtain a more accurate printing position of the to-be-printed medium 2A, the inventor further configures a photoelectric sensor (i.e. the first detecting unit 3) at a position close to the thermal head 1, and corrects the edge information of the to-be-printed medium 2A obtained by the photoelectric sensor relatively far from the thermal head 1, so that when the edge of the to-be-printed medium 2A is fed to the thermal head 1, the more accurate to-be-printed position can be obtained, and the deviation of the printing position is reduced as much as possible. Specifically, the memory of the printing apparatus of the present invention stores executable code that can be executed by the processor to achieve the purpose of correcting the edge information of the medium 2A to be printed detected by the photosensor located close to the thermal head 1 from the photosensor located far from the thermal head 1, as will be further described below.

In a first embodiment, referring to fig. 1, the executable code described above can be executed by the processor to implement the following steps: s100, acquiring the first edge information and the slit width 2B of the medium 2A to be printed detected by the second detection unit 4 to acquire first edge reference information. S200, the second edge information of the medium 2A to be printed detected by the first detecting unit 3 is obtained. And S300, obtaining the edge information of the medium 2A to be printed according to the second edge information and the first edge reference information.

It is to be understood that in the above-described steps S100 to S300, the printing medium tape having the medium 2A to be printed is in the fed state. The fed state includes a moving state when fed and a stationary state of the thermal head 1 when printing is performed.

In the embodiment of the present invention, referring to fig. 2 and 3 in combination, when the print medium tape 2 is fed in the feeding direction, the first detecting unit 3 and the second detecting unit 4 detect the print medium 2A. The voltage value output by the light receiving component of the photoelectric sensor changes according to the intensity of the received light. Specifically, the slit width 2B is arranged between the printing medium and the printing medium, the intensity of the light rays which pass through the printing medium and the slit width 2B are different, and when the printing medium and the slit width 2B are in transition, the intensity of the light rays which are received by the light receiving assembly changes, so that the output voltage value changes, and the position of the voltage value change is the boundary position of the printing medium and the slit width 2B. In general, the voltage values at the print medium and the slit width 2B each fluctuate within a certain threshold value, whereas the transition from the print medium to the slit width 2B is a transition of the fluctuation between the two threshold values, which transition value is much larger than the value that varies by the fluctuation within a single threshold value.

In the embodiment of the present invention, the second light receiving element 42 of the second detecting unit 4 (i.e. a photosensor remote from the thermal head 1) receives the light passing through the printing medium and converts the light into the second voltage value. The processor of the printing apparatus obtains the boundary position of the printing medium and the slit width 2B, that is, the edge of the printing medium by the change of the second voltage value, and confirms the position of the slit width 2B and the width of the slit width 2B by the change of the second voltage value twice. The junction between the slit width 2B and the position to be printed is the first edge information, and the edge of the slit width 2B and the width of the slit width 2B are confirmed through the first edge information and the junction between the slit width 2B and the previous printing medium. Wherein, during the process of the second detection unit 4, the controller records the second voltage value detected by the second detection unit 4.

Preferably, the controller in the present application records the voltage value specifically as follows: the voltage value is recorded once every time the motor rotates by one step distance. It will be appreciated that in other embodiments, which do not specifically limit the motor rotation by one step, i.e. record a voltage value, it may be recorded one step apart or a plurality of steps apart.

In the embodiment of the present invention, referring to fig. 8 and 9 in combination, the controller of the present application confirms the first edge information through the edge of the slit width 2B described above. For example, the printing medium tape 2 has a current printing medium 2A and a last printing medium 2E having a slit width distance therefrom. Acquiring the rear edge 2D information of the last printing medium and the front edge 2C information of the current medium to be printed so as to obtain first edge information and a seam width 2B; the slit width 2B is a distance between the detected trailing edge 2D information of the last printing medium and the detected leading edge 2C information of the to-be-printed medium, and the first edge information is the leading edge 2C information of the current to-be-printed medium. It is understood that in other embodiments, the first edge information may also be the trailing edge 2D information of the previous printing medium, and for simplicity of operation, the first edge information is adopted as the leading edge 2C information of the previous printing medium.

In the embodiment of the present invention, the step of obtaining the first edge reference information specifically includes: and obtaining first edge reference information according to the obtained first edge information and preset feeding length information. Wherein the feeding length information is a feeding stroke of the medium to be printed from the second detecting unit 4 to the first detecting unit 3. The feed stroke is pre-stored in the controller and in the embodiment of the invention is specifically identified by the pitch of the motor rotation. For example, the motor is rotated by 800 steps at a theoretical distance of 10cm for feeding the printing medium, and the controller confirms that the printing medium is fed by a feeding stroke of 10cm by rotating the motor by 800 steps.

In step S200, the second edge information of the medium 2A to be printed detected by the first detecting unit 3 (i.e. a photo sensor near the thermal head 1) is obtained.

In an embodiment of the present invention, referring to fig. 3, step S200 includes: s210, after determining that the second detecting unit 4 detects the first edge information and the slit width 2B, feeding the printing medium tape 2 by a preset distance so that the front edge 2C of the printing medium is located at the first distance behind the first detecting unit 3. S220, when it is determined that the front edge of the print medium is located at the first distance behind the first detecting unit 3, recording of the first voltage value detected by the first detecting unit 3 is started. And S230, obtaining second edge information according to the obtained first voltage value and the slit width 2B.

For example, after the second detecting unit 4 detects the first edge information and the slit width 2B, the slit width information and the first edge information are recorded, and the first edge reference information is obtained according to the slit width information and the first edge information, at this time, the printing medium tape continues to be in a feeding state, and the first detecting unit 3 is also in a detecting state, but the controller does not record the voltage value information of the current printing medium 2A to be printed. Of course, it is understood that the voltage value of the last printing medium 2E or the nth preceding printing medium of the current printing medium 2A to be printed may be recorded. After the front edge 2C of the current medium to be printed (i.e., the first edge information in the present embodiment) is fed to be located at a first distance behind the thermal head 1, for example, after the first edge information and the slit width 2B are obtained, the front edge 2C of the current medium to be printed is fed to be located at 0.4cm behind the first detecting unit 3. And starts recording the first voltage value detected by the first detecting unit 3 after judging that the front edge 2C of the current medium to be printed is fed to 0.4cm behind the first detecting unit 3 (where the distance is a theoretical distance calculated by the motor rotation step distance). Wherein 0.4cm is only one practical embodiment, and the first distance is not limited to only 0.4cm.

It can be understood that, when the second detecting unit 4 detects the first edge information and the slit width 2B of the current to-be-printed medium 2A, the recording of the voltage value detected by the first detecting unit 3 as the first voltage value of the current to-be-printed medium 2A may be started. However, in view of the fact that the length of the printing medium in the feeding direction is far smaller than the distance from the second detecting unit 4 to the first detecting unit 3, the first detecting unit 3 may detect the nth printing medium in front of the current printing medium 2A. In order not to make the voltage value detected by the first detecting unit 3 at this time be used for a plurality of printing media at the same time, and in order to simplify the operation, the front edge 2C of the current medium to be printed is fed to a first distance behind the first detecting unit 3, and recording of the first voltage value detected by the first detecting unit 3 at this time is started for determination of the second edge information of the current medium to be printed 2A.

In the embodiment of the present invention, referring to fig. 4, step S230 obtains second edge information according to the obtained first voltage value and the slit width 2B, which includes the steps of: and S231, obtaining a voltage sum according to the first voltage value and the slit width 2B. S232, obtaining the maximum voltage sum according to the voltage sum. And S233, obtaining second edge information according to the position of the maximum voltage sum.

Step S231 obtains a voltage sum according to the first voltage value and the slit width 2B, which specifically includes: the motor rotates one step distance, a voltage value is recorded, and the voltage sum is calculated once when the motor rotates n steps distances. In this embodiment, the calculated one voltage sum is the sum of all the first voltage values within one slit width length. It will be appreciated that in other embodiments, the sum of one voltage and several voltage values in sequence over one slot width length is calculated, for example, one slot width length has 21 first voltage values, and the 1 st, 5 th, 9 th, 13 th, 17 th, 21 st first voltage values are selected and taken as the sum of voltages. For example, a slit width length has 10 first voltage values, and the 1 st, 4 th, 7 th and 10 th first voltage values are selected and summed to be the voltage sum. The above examples are only practical embodiments, and the present application does not limit the selection method of the first voltage value to the above embodiments. Of course, in further embodiments, the voltage sum may be calculated in units of the sum of all first voltage values within half a slit width 2B. Preferably, one calculation unit of the voltage sum is one half slit width 2B to one slit width 2B.

In an embodiment of the present invention, referring to fig. 5, step S232, obtaining a maximum voltage sum according to the voltage sum, includes the following steps: S232A, comparing the magnitudes of the front voltage sum and the rear voltage sum to obtain a larger voltage sum. S232B, feeding the printing medium tape 2a preset distance so that the front edge 2C of the printing medium is located at a second distance in front of the first detecting unit 3. S232C, when it is determined that the leading edge 2C of the medium to be printed is located at the second distance in front of the first detecting unit 3, the calculation of the voltage sum is stopped. S232D, comparing all the voltage sums to obtain the maximum voltage sum and the position of the maximum voltage sum.

The method comprises the steps of sequentially comparing the front voltage sum with the rear voltage sum which are sequentially calculated, selecting a larger voltage sum, discarding the smaller voltage sum, comparing the obtained larger voltage sum with a subsequent voltage sum, and selecting the larger voltage sum. When it is judged that the front edge 2C of the current medium to be printed is fed to the front edge at the second distance in front of the first detecting unit 3, the calculation of the voltage sum is stopped. After the comparison of all the voltage sums is completed in sequence, the maximum voltage sum is obtained. It is understood that the maximum voltage sum includes the first and second voltage values, and the position of the maximum voltage sum can be obtained through the positions of the first and second voltage values.

For example, according to step S210, after the front edge 2C of the current medium to be printed is located behind the first detecting unit 3 by a first distance of 0.4cm, the feeding of the printing medium tape 2 is continued until the front edge 2C of the current medium to be printed is located in front of the first detecting unit 3 by a second distance of 0.4cm, that is, 20.8cm (the feeding distance is a theoretical distance calculated by the motor rotation step). By step S210 and step S232C, it is possible to reduce the calculated length of the voltage sums and make the calculated voltage sums available only to the current medium 2A to be printed so as not to confuse the voltage sums of other printing media.

In the embodiment of the present invention, step S233 obtains the second edge information according to the position of the maximum voltage sum. The second edge information is the maximum voltage and a first voltage value last recorded in the feeding direction. Which specifically corresponds to the aforementioned first edge information, with reference to the front edge 2C information of the current medium to be printed. It is understood that in the present embodiment, the carbon ribbon 5 is sandwiched between the first light emitting element 31 and the first light receiving element 32 of the first detecting unit 3, specifically, the carbon ribbon 5 is sandwiched between the first light emitting element 31 and the medium 2A to be printed and the slit width 2B. Therefore, in the detection process of the first detection unit 3, the change of the voltage value at the edge positions of the medium 2A to be printed and the slit width 2B is not obvious due to the light absorption effect of the carbon ribbon 5, and the sum of the voltage values is obviously changed relative to the single voltage value by adopting a mode of calculating the sum of the voltages. Therefore, by calculating the voltage sum, the positions of the edge of the medium 2A to be printed and the slit width 2B can be determined more accurately.

For example, the stronger the light passing through the print medium tape 2, the larger the converted voltage. In the case where the carbon ribbon 5 is not present, the second voltage value of the slit width 2B detected by the second detecting unit 4 is 2.7V to 3.2V, and the second voltage value of the medium to be printed 2A detected by the second detecting unit 4 is 0 to 0.6V. Under the condition that the carbon ribbon 5 is blocked, the first voltage value of the seam width 2B detected by the first detection unit 3 is 2.7-5V, and the first voltage value of the medium 2A to be printed detected by the second detection unit 4 is 0-2V. This results in a large range of variations in the first voltage value detected by the first detecting unit 3 on the printing medium or across the slit width 2B. Therefore, the voltage sum along a preset length in the feeding direction is calculated, so that the obtained voltage sum is stable and is used as a basis for judging the second edge information. It will be appreciated that the above-described embodiment is only one embodiment that may be implemented, and that the present application does not merely provide examples of the values of the detected voltage values. In other embodiments, there may be a case where "the stronger the light passing through the print medium tape 2, the smaller the converted voltage", at which time the maximum voltage sum of the present embodiment may be modified to the minimum voltage sum.

In an embodiment of the present invention, referring to fig. 6, step S300, according to the second edge information and the first edge reference information, obtains edge information of a medium 2A to be printed, includes the following steps: and S310, judging the second edge information as the edge information of the medium 2A to be printed when judging that the distance between the second edge information and the first edge reference information along the feeding direction is not more than a preset threshold value. And S320, judging the first edge information as the edge information of the printing medium when judging that the distance between the second edge information and the first edge reference information along the feeding direction is larger than a preset threshold value.

In the embodiment of the present invention, the first edge reference information acquired in the step S100 and the second edge information acquired in the step S200 are calculated or matched, and when the judgment result is that the distance between the second edge information and the first edge reference information along the feeding direction is not greater than a preset threshold limit value, the second edge information is taken as the edge information of the printing medium. And when the judgment result is that the distance between the second edge information and the first edge reference information along the feeding direction is larger than a preset threshold value, the first edge information is used as the edge information of the printing medium.

For example, the first edge information is preset to be 0 based on the first edge information, the feeding stroke required for feeding the first detecting unit 3 from the second detecting unit 4 pre-stored in the controller is 10cm, the step distance required for the motor rotation is 1000 steps, and the first edge reference information is 1000. The preset threshold value is 0.3cm (i.e. 30 steps), and when the position of the second voltage value of the second edge information detected by the first detecting unit 3 is the actual step distance of the motor at the position starting from 0, if the step distance of the motor at the position is within the range of 985 to 1015 when the second voltage value of the second edge information is detected, the second edge information is judged to be the edge information of the medium 2A to be printed. At this time, the second edge information is used to achieve the effect of correction.

However, in practical situations, there may be a preprint on the printing medium or too much light absorbed on the carbon tape 5, which may cause the information detected by the first detecting unit 3 to deviate too much. For example, in the above example, when the second voltage value of the second edge information is detected, the step distance of the motor to the position is outside the range of 985 to 1015, i.e. the distance between the second edge information and the first edge reference information is greater than 0.3cm (i.e. 30 steps), and at this time, the first edge information is used as the edge information of the medium 2A to be printed.

Referring to fig. 2, after step S300, the following steps are further included: and S400, feeding the edge information of the medium 2A to be printed to a preset printing position. S500, sending an instruction to the thermal head 1 to enable the thermal head 1 to execute printing.

Preferably, the apparatus and its implementation functions and steps described above are applicable to office printing apparatus as well as to small portable printing apparatus. For example, when used on a portable printing apparatus, the first detecting unit 3 has a preset distance L1 between the printing dots of the thermal head 1 in the feeding direction, wherein 1 cm.ltoreq.L1.ltoreq.3 cm. The first detecting unit 3 has a preset distance L2 between the second detecting unit 4 along the feeding direction, wherein L2 is more than or equal to 8cm. Specifically, L1 is greater than or equal to 1cm for preventing the thermal head 1 from interfering with the detection result of the first detection unit 3 when performing printing operation, and L1 is less than or equal to 3cm for limiting the first detection unit 3 from being too close to the thermal head 1 so as to prevent the edge of the medium 2A to be printed from being fed from the first detection unit 3 to the position of the thermal head 1 from having a larger feeding deviation. L2 is 8cm or more, which is used for limiting the second detection unit 4 not to have the carbon ribbon 5 interfere with the detection result. For another example, L1 in the present application may be specifically 2cm, and L2 may be 10cm. The example is merely one embodiment that may be implemented to provide an example, and the present application is not limited to the specific embodiment described above.

It will be appreciated that the feed stroke of the printing medium is not rectilinear and is in a horizontal plane, so that the distance between the first detection unit 3 and the second detection unit 4 is easily verified, and therefore the printing apparatus is designed to: the first detection unit 3 has a preset distance L3 between the printing point of the thermal head 1 along the horizontal direction, wherein L3 is more than or equal to 1cm and less than or equal to 3cm. The first detecting unit 3 has a preset distance L4 between the printing point of the thermal head 1 along the horizontal direction, wherein L4 is more than or equal to 8cm. Similarly, L3.gtoreq.1 cm is used to prevent the thermal head 1 from interfering with the detection result of the first detection unit 3 when performing printing operation, and L3.gtoreq.3 cm is used to limit the first detection unit 3 from being too close to the thermal head 1, so that a larger feeding deviation occurs when the edge of the medium 2A to be printed is fed from the first detection unit 3 to the thermal head 1. L4 is greater than or equal to 8cm, which is used to limit the second detection unit 4 not to have the carbon ribbon 5 interfere with the detection result. For another example, L3 in the present application may be specifically 2cm, and L4 may be 10cm. The example is merely one embodiment that may be implemented to provide an example, and the present application is not limited to the specific embodiment described above.

Preferably, the paper feed roller 6, the detection device, and the thermal head 1 are arranged in order along the feed direction. The printing device also comprises a pressing roller 7 which is arranged opposite to the thermal head 1 and is positioned at the other side of the paper feeding channel, and the pressing roller is matched with the thermal head 1 to press the printing medium so as to execute printing action on the printing medium.

Second embodiment:

a second embodiment of the present invention provides a method of determining an edge of a printing medium, including the following steps.

The first edge information and the slit width 2B of the medium 2A to be printed detected by the second detecting unit 4 are acquired to obtain first edge reference information.

Acquiring second edge information of the medium 2A to be printed detected by the first detection unit 3; the second detecting unit 4, the first detecting unit 3 and the thermal head 1 are sequentially arranged along the printing feeding direction.

And obtaining the edge information of the medium 2A to be printed according to the second edge information and the first edge reference information.

On the basis of the above embodiment, the edge determining method of the printing medium of the present embodiment further includes the steps of:

and feeding the edge information of the medium 2A to be printed to a preset printing position.

And sending an instruction to the thermal head 1 to enable the thermal head 1 to execute printing.

Other features not mentioned in the second embodiment may be the same as those in the first embodiment, and the applicable modification and advantageous effects may also be the same as those in the first embodiment, so that a detailed description thereof is omitted.

Third embodiment:

referring to fig. 7, a printing apparatus according to a third embodiment of the present invention includes a feeding module 410, a detecting module 420, a recording module 430, a calculating module 440, and a judging module 450. The feeding module 410 is used to feed the printing medium. The detecting module 420 is configured to detect and acquire voltage value information of the printing medium. The recording module 430 is for recording a feeding distance of the printing medium, and for recording voltage value information. The calculation module 440 may calculate the voltage and information based on the voltage value information. The judging module 450 may judge according to the voltage value information and the voltage and information to obtain first edge information, second edge information and voltage and information of the printing medium, and the judging module 450 may further judge according to the first edge information, the second edge information and the voltage and information to obtain edge information of the printing medium.

On the basis of the above embodiment, in a preferred embodiment of the present invention, further includes: the acquisition module is used for acquiring the voltage value information detected by the detection module.

Fourth embodiment:

a fourth embodiment of the present invention provides a computer readable storage medium, where the computer readable storage medium includes a stored computer program, where when the computer program runs, a device where the computer readable storage medium is controlled to execute the method for configuring brightness of a light emitting unit in a printer described in the foregoing embodiment.

Illustratively, the computer program of the present invention may be partitioned into one or more modules, which are stored in the memory and executed by the processor to perform the present invention. The one or more modules may be a series of computer program instruction segments capable of performing the specified functions, which are used to describe the execution of the computer program in the implementation server device. For example, the apparatus described in the third embodiment of the present invention.

The processor may be a central processing unit (Central Processing Unit, CPU), other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (APPlication Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, which is a control center of the light emitting unit luminance configuration method in the printer, and connects the various parts of the overall implementation of the light emitting unit luminance configuration method in the printer using various interfaces and lines.

The memory may be used to store the computer program and/or module, and the processor may implement various functions of the light emitting unit brightness configuration method in the printer by running or executing the computer program and/or module stored in the memory and invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, a text conversion function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, text message data, etc.) created according to the use of the user terminal, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid-state storage device.

Wherein the modules implementing the service device may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as a stand alone product. Based on this understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of each method embodiment described above when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

It should be noted that the above-described apparatus embodiments are merely illustrative, and the units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A printing apparatus has a controller including a memory and a processor, a feeding device, a thermal head, and a detecting device electrically connected to the controller, respectively; the device is characterized by comprising a first detection unit and a second detection unit, wherein the second detection unit, the first detection unit and the thermal head are sequentially arranged along the printing feeding direction, and the first detection unit and the second detection unit have a preset step distance along the feeding direction; the memory stores executable code executable by the processor to implement the steps of:

Feeding a print medium tape; wherein the print media tape comprises a plurality of media to be printed with a slit between adjacent media to be printed; the junction of the seam and the medium to be printed forms the edge of the medium to be printed;

acquiring first edge information of a current medium to be printed based on a detection result of the second detection unit;

acquiring second edge information of the current medium to be printed at least based on the detection result of the first detection unit; the method comprises the steps of obtaining second edge information of a current medium to be printed based on a detection result of a first detection unit and a seam width of a seam between adjacent media to be printed;

and determining the edge information of the current medium to be printed according to the first edge information, the second edge information and the preset step distance.

2. The printing apparatus according to claim 1, wherein the first edge information and the second edge information are boundary information of a transition from the slot to a front end of the current medium to be printed.

3. A printing apparatus according to claim 1, further comprising:

acquiring the seam width of the seam between adjacent media to be printed based on the detection result of the second detection unit;

Acquiring the second edge information of the current medium to be printed based on at least the detection result of the first detection unit, specifically including:

when the second detecting unit detects the first edge information and the seam width, feeding a printing medium belt for a preset distance so that the front edge of the current medium to be printed is positioned at a first distance behind the first detecting unit;

when the front edge of the current medium to be printed reaches a first distance behind the first detection unit, recording a first voltage value detected by the first detection unit; and

and obtaining second edge information according to the first voltage values and the slit widths which are obtained through continuous measurement.

4. A printing apparatus according to claim 3, wherein said obtaining second edge information from a plurality of first voltage values and slit widths measured consecutively comprises:

summing every N first voltage values obtained through continuous measurement, and calculating to obtain a plurality of voltage sums; said N being determined by said slit width;

obtaining a maximum voltage sum of a plurality of the voltage sums;

and obtaining second edge information according to the detection position of the first voltage value forming the maximum voltage sum.

5. A printing device according to claim 4, wherein a sum of voltages is the sum of all first voltage values detectable over a length of the slot width.

6. The printing apparatus according to claim 1, wherein determining edge information of the current medium to be printed based on the first edge information, the second edge information, and the predetermined step distance, comprises:

when judging that the difference value between the step distance of the second edge information from the first edge information along the feeding direction and the preset step distance is not larger than a preset threshold value, setting the second edge information as the edge information of the current medium to be printed;

and when judging that the difference value between the step distance of the second edge information from the first edge information along the feeding direction and the preset step distance is larger than a preset threshold value, setting the first edge information as the edge information of the current medium to be printed.

7. A printing apparatus, comprising:

a feeding module for feeding a print medium tape; wherein the print media tape comprises a plurality of media to be printed with a slit between adjacent media to be printed; the junction of the seam and the medium to be printed forms the edge of the medium to be printed;

The detecting module is used for detecting and acquiring first edge information and second edge information of a medium to be printed on the printing medium tape; the detection module comprises a first detection unit for detecting second edge information and a second detection unit for detecting the first edge information, wherein the second detection unit, the first detection unit and the thermal head are sequentially arranged along the printing feeding direction, and the first detection unit and the second detection unit have a preset step distance along the feeding direction; the recording module is used for recording the first edge information and the second edge information; the method comprises the steps of obtaining second edge information of a current medium to be printed based on a detection result of a first detection unit and a seam width of a seam between adjacent media to be printed; and

and the judging module is used for judging according to the first edge information, the second edge information and the preset step distance to acquire the edge information of the medium to be printed.

8. A method of determining an edge of a print medium, comprising:

acquiring first edge information of the medium to be printed detected by the second detection unit;

acquiring second edge information of the medium to be printed detected by the first detection unit; the first detection unit and the second detection unit are provided with a preset step distance along the feeding direction; the method comprises the steps of obtaining second edge information of a current medium to be printed based on a detection result of a first detection unit and a seam width of a seam between adjacent media to be printed;