CN118426127A - Device and method for improving image exposure precision - Google Patents

Abstract

The embodiment of the present application discloses a device and method for improving image exposure accuracy, the device comprising: a first horizontal guide rail, a first transmission assembly, a second transmission assembly and a second horizontal guide rail arranged in parallel from top to bottom on the same side of a vertical plate; a first encoder is arranged at the upper end of a vertical beam, a second encoder is arranged at the lower end, a first grating is arranged at the upper end of the first horizontal guide rail, and a second grating is arranged at the lower end; a control module controls the horizontal movement of the vertical beam to obtain a first real-time displacement S1 of the upper end of the vertical beam and a second real-time displacement S2 of the lower end, the control module dynamically adjusts the first real-time displacement S1 and the second real-time displacement S2 to keep the first real-time displacement S1 and the second real-time displacement S2 dynamically equal, the vertical beam is in a vertical state as much as possible during the horizontal movement, and provides a guarantee for accurate exposure of the image by a plurality of lasers distributed in a column shape on the vertical beam.

Description

Device and method for improving image exposure accuracy

Technical Field

The embodiments of the present application belong to the field of laser direct writing equipment, and in particular, relate to a device and method for improving image exposure accuracy.

Background technique

In the prior art, a plurality of lasers (four lasers 105A to 105D are shown in the present application as an example) are mounted in a row on the vertical beam 104 of the laser direct writing device 100. The upper end of the vertical beam 104 is located on the first horizontal guide rail 101, the lower end is located on the second horizontal guide rail 102, and the middle part is located on the upper end of the first conveyor belt 106. One end of the first conveyor belt 106 is sleeved on the first motor 108, and the other end is sleeved on the first driven wheel 107. The output shaft of the first motor 108 is sleeved with a first driving wheel 115. The first motor 108 drives the first driving wheel 115 to rotate under the control of the control module 109. The first driving wheel 115 drives the first conveyor belt 106 to reciprocate horizontally. The first conveyor belt 106 drives the vertical beam 104 to reciprocate left and right on the first horizontal guide rail 101 and the second horizontal guide rail 102. The plurality of lasers 105A to 105D emit light to expose the image during the horizontal movement.

Theoretically, at any time, the upper end and the lower end of the vertical beam 104 are at the same position in the horizontal direction during the movement, that is, the vertical beam 104 is always in a vertical state during the horizontal movement. For example, in FIG1, in theory, the vertical beam 104 is always perpendicular to the first conveyor belt 106 during the journey from point M to point N, that is, the vertical beam 104 is always in a vertical state. However, the actual situation is that, as shown in FIG2, due to the different resistances of the upper end and the lower end of the vertical beam 104 on the first horizontal guide rail 101 and the second horizontal guide rail 102, after a period of horizontal movement to point N, the travel of the upper end and the lower end of the vertical beam 104 is not synchronized, and the vertical beam 104 is deflected, causing several lasers 105A~105D on the vertical beam 104 to also be deflected, resulting in a significant reduction in the exposure accuracy of the image.

Summary of the invention

An embodiment of the present application provides a device for improving image exposure accuracy, the purpose of which is to solve the problem of low laser exposure image accuracy caused by the deflection of the vertical beam of the laser assembly due to the asynchronous travel of the upper and lower ends during the horizontal movement of the vertical beam.

A device for improving image exposure accuracy, used in a laser direct writing device, comprising: a first horizontal guide rail, a first transmission assembly, a second transmission assembly and a second horizontal guide rail arranged in parallel from top to bottom on the same side of a vertical plate of the laser direct writing device;

The upper end of a vertical beam is detachably connected to the first transmission assembly, and the lower end is detachably connected to the second transmission assembly. A first encoder is arranged at the upper end of the vertical beam, and a second encoder is arranged at the lower end of the vertical beam. A first grating is arranged at the upper end of the vertical plate located on the first horizontal guide rail, and a second grating is arranged at the lower end of the vertical plate located on the second horizontal guide rail.

A control module simultaneously controls the first transmission component and the second transmission component to respectively drive the upper end and the lower end of the vertical beam to move on the first horizontal guide rail and the second horizontal guide rail, the first encoder reads the first grating to obtain the first real-time displacement S1 of the upper end of the vertical beam, and the second encoder reads the second grating to obtain the second real-time displacement S2 of the lower end of the vertical beam, and the control module dynamically adjusts the first real-time displacement S1 and the second real-time displacement S2 so that: the first real-time displacement S1 and the second real-time displacement S2 remain dynamically equal, and the vertical beam is in a vertical state as much as possible during the horizontal movement, so as to provide a guarantee for the accurate exposure of the image by a plurality of lasers distributed in a column shape on the vertical beam;

Among them, S1 and S2 are variables that change with time, and the initial positions of the upper end and the lower end of the vertical beam in the horizontal direction are the same.

Further, the first transmission assembly includes a first motor, a first driving wheel, a first conveyor belt and a first driven wheel; the first driving wheel is sleeved on the output shaft of the first motor, the two ends of the first conveyor belt are sleeved on the first driving wheel and the first driven wheel respectively, and the upper end of the vertical beam is detachably connected to the first conveyor belt;

The second transmission assembly includes a second motor, a second driving wheel, a second conveyor belt and a second driven wheel. The second driving wheel is sleeved on the output shaft of the second motor. The two ends of the second conveyor belt are respectively sleeved on the second driving wheel and the second driven wheel. The lower end of the vertical beam can be removed and connected to the second conveyor belt.

Furthermore, the control module dynamically adjusts the first real-time displacement S1 and the second real-time displacement S2, and the dynamic adjustment steps are:

The control module simultaneously receives the first real-time displacement S1 sent by the first encoder and the second real-time displacement S2 sent by the second encoder, and compares the sizes:

If S1>S2, the vertical beam deflects to the right, and the control module controls the speed of the first motor to be lower than that of the second motor, until after time t1, the first encoder and the second encoder send S1 and S2 to the control module again, and after the control module compares S1=S2, it adjusts the speed of the first motor to be equal to that of the second motor;

If S1=S2, the vertical beam remains in a vertical state, and the control module controls the speed of the first motor to be equal to the speed of the second motor;

If S1＜S2, the vertical beam deflects to the left, and the control module controls the speed of the first motor to be greater than the second motor until time t2 has passed, when the first encoder and the second encoder send real-time S1 and S2 to the control module again respectively. After the control module compares S1=S2, it adjusts the speed of the first motor to be equal to that of the second motor.

Furthermore, the first motor and the second motor are both servo motors and have the same specifications.

Furthermore, the first driving wheel and the first driven wheel are both spur gears of the same specification; the second driving wheel and the second driven wheel are both spur gears of the same specification.

Furthermore, the control module is a chip processor.

Furthermore, a first slider is provided at the upper end of the vertical beam, and a second slider is provided at the lower end. The upper end of the vertical beam moves horizontally on the first horizontal guide rail through the first slider, and the lower end of the vertical beam moves horizontally on the second horizontal guide rail through the second slider.

The present invention also discloses a method for improving image exposure accuracy, which aims to solve the problem of low laser exposure image accuracy caused by deflection of the vertical beam due to the asynchronous travel of the upper end and the lower end of the vertical beam of the laser assembly during horizontal movement. The method comprises:

The control module obtains a first real-time displacement S1 of the upper end of the vertical beam of the laser direct writing device and a second real-time displacement S2 of the lower end of the vertical beam;

The control module compares the magnitudes of the first real-time displacement S1 and the second real-time displacement S2, and dynamically adjusts the speed of the upper end portion and the speed of the lower end portion of the vertical beam, so that the first real-time displacement S1 and the second real-time displacement S2 maintain dynamic equality, thereby providing a guarantee for the accurate exposure of the image by the plurality of lasers distributed in a row on the vertical beam;

Among them, S1 and S2 are variables that change with time, and the initial positions of the upper end and the lower end of the vertical beam in the horizontal direction are the same.

Further, the control module compares the magnitudes of the first real-time displacement S1 and the second real-time displacement S2, and adjusts the speed of the upper end portion and the speed of the lower end portion of the vertical beam so that the first real-time displacement S1 and the second real-time displacement S2 maintain dynamic equality, specifically including:

The control module simultaneously receives the first real-time displacement S1 sent by the first encoder and the second real-time displacement S2 sent by the second encoder, and compares the sizes:

If the vertical beam deflects to the right, S1>S2, and the control module controls the speed of the first motor to be lower than that of the second motor, until after time t1, the first encoder and the second encoder send the first real-time displacement S1 and the second real-time displacement S2 to the control module again, and after the control module compares S1=S2, it adjusts the speed of the first motor to be equal to that of the second motor;

If the vertical beam remains in a vertical state, then S1=S2, and the control module controls the speed of the first motor to be equal to the speed of the second motor;

If the vertical beam deflects to the left, S1<S2, and the control module controls the speed of the first motor to be greater than that of the second motor until time t2 has passed, when the first encoder and the second encoder send the first real-time displacement S1 and the second real-time displacement S2 to the control module respectively again. After the control module compares that the first real-time displacement S1 is equal to the second real-time displacement S2, the speed of the first motor is adjusted to be equal to that of the second motor.

Furthermore, the first real-time displacement S1 and the second real-time displacement S2 are obtained by:

A first encoder disposed at the upper end of the vertical beam reads a first grating disposed on the vertical plate above the first encoder to obtain a first real-time displacement S1 of the upper end of the vertical beam;

The second encoder arranged at the lower end of the vertical beam reads the second grating arranged on the vertical plate below the second encoder to obtain the second real-time displacement S2 of the lower end of the vertical beam.

Technical effect of the present invention: In the laser direct writing device, the first encoder obtains the first real-time displacement S1 of the upper end of the vertical beam by reading the first grating; the second encoder obtains the second real-time displacement S2 of the lower end of the vertical beam by reading the second grating. The first encoder and the second encoder send the first real-time displacement S1 and the second real-time displacement S2 to the control module respectively, and the control module determines the size of the first real-time displacement S1 and the second real-time displacement S2 to determine whether the vertical beam is deflected. If deflection occurs, a control signal is sent to the first motor of the first transmission component and the second motor of the second transmission component to adjust the speed of the first motor and the speed of the second motor, so that after a period of time, the first real-time displacement S1 is equal to the second real-time displacement S2 again, that is, the vertical beam is in a vertical state again. In the subsequent horizontal movement of the vertical beam, if deflection occurs again, the control module adjusts the upper and lower ends of the vertical beam again so that the vertical beam is in a vertical state again. During the entire horizontal movement of the vertical beam, it is in the following state: vertical (initial position) - deflection - readjustment to vertical - deflection - readjustment to vertical, so that the vertical beam maintains a dynamic vertical state, providing a guarantee for the accurate exposure of images by several lasers on the vertical beam.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram showing that in an ideal state, when the upper and lower ends of the laser assembly of the existing laser direct writing device are respectively running on the first horizontal rail and the second horizontal rail, the vertical beam 104 of the laser assembly is always kept vertical (ie, no deflection occurs);

FIG2 is a schematic diagram showing the deflection of the vertical beam 104 of the laser assembly of the existing laser direct writing device in actual state after the upper and lower ends of the laser assembly run on the first horizontal rail and the second horizontal rail for a period of time respectively;

FIG3 is a schematic diagram of a first embodiment of a control module regulating a laser assembly in an embodiment of the present application;

FIG4 is a schematic diagram of a second embodiment of a control module regulating a laser assembly in an embodiment of the present application;

FIG5 is a diagram of the method steps of an embodiment of the present application.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used to describe the difference, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate object, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Referring to FIG. 3 , a device 100i for improving image exposure accuracy disclosed in the present invention includes:

The first horizontal guide rail 101, the first transmission assembly, the second transmission assembly and the second horizontal guide rail 102 are arranged in parallel from top to bottom on the same side of the vertical plate 103. A vertical beam 104 is vertically arranged on the first horizontal guide rail 101 and the second horizontal guide rail 102. That is, the upper end of the vertical beam 104 is detachably connected to the first horizontal guide rail 101, and the lower end is detachably connected to the second horizontal guide rail 102. A first encoder 117 is arranged at the upper end of the vertical beam 104, and a second encoder 118 is arranged at the lower end of the vertical beam 104. A first grating 119 is arranged at the upper end of the vertical plate 103 located at the first horizontal guide rail 101, and a second grating 120 is arranged at the lower end of the vertical plate 103 located at the second horizontal guide rail 102. On the vertical beam 104, a plurality of lasers are arranged in a row (four lasers 105A to 105D are listed in this application as an example). Under the control of the control module 109 , the first transmission assembly and the second transmission assembly respectively drive the upper end and the lower end of the vertical beam 104 to move horizontally on the first horizontal guide rail 101 and the second horizontal guide rail 102 . Driven by the vertical beam 104, the first encoder 117 reads the first grating 119 to obtain the first real-time displacement S1 of the upper end of the vertical beam 104, and the second encoder 118 reads the second grating 120 to obtain the second real-time displacement S2 of the lower end of the vertical beam 104. The control module 109 dynamically adjusts the first real-time displacement S1 and the second real-time displacement S2 to maintain dynamic equality. The vertical beam 104 is in a dynamic vertical state after dynamic adjustment during the horizontal movement: vertical (initial position)-deflection-vertical-deflection-vertical, that is, as long as the vertical beam 104 deflects, the control module 109 will adjust it and correct its deflected posture. After a period of time, the vertical beam 104 returns to a vertical state, which provides a guarantee for accurate exposure of the image.

It is understandable that both S1 and S2 are variables that change with time, and S1 and S2 are not always equal as the vertical beam moves in the horizontal direction. It is possible that S1>S2 or S1<S2. When S1>S2 or S1<S2, the upper and lower ends of the vertical beam are dynamically adjusted to maintain S1=S2. It should be noted that in the initial position, that is, when the upper and lower ends of the vertical beam 104 are both at the horizontal position M, the vertical beam 104 is in a vertical state.

Referring to FIG. 3 , preferably, the first transmission assembly arranged on the vertical plate 103 includes: a first motor 108, a first driving wheel 115, a first conveyor belt 106 and a first driven wheel 107, and the first driving wheel 115 and the first driven wheel 107 are arranged at the same height. The first driving wheel 115 is sleeved on the output shaft of the first motor 108, one end of the first conveyor belt 106 is connected to the first driving wheel 115, and the other end is connected to the first driven wheel 107. The control module 109 is electrically connected to the first motor 108. The control module 109 can send various control instructions to the first motor 108, and these control instructions can be, for example, rotation speed, rotation time, and torque. When the control module 109 sends a driving instruction to the first motor 108, the first motor 108 rotates, driving the first conveyor belt 106 to move back and forth left and right. The second transmission assembly arranged on the vertical plate 103 includes: a second motor 111, a second driving wheel 116, a second conveyor belt 112 and a second driven wheel 113. The second driving wheel 116 is sleeved on the output shaft of the second motor 111. One end of the second conveyor belt 112 is connected to the second driving wheel 116, and the other end is connected to the second driven wheel 107. The second motor 111 is electrically connected to the control module 109. The control module 109 can send various control instructions to the second motor 111, and these control instructions can be, for example, rotation speed, rotation time, and torque. When the control module 109 sends a driving instruction to the second motor 111, the second motor 108 rotates, driving the second conveyor belt 112 to move back and forth.

It should be noted that the first conveyor belt 106 and the second conveyor belt 112 can also be replaced by chains, and the chain drive can replace the belt drive. The first conveyor belt 106 and the second conveyor belt 112 can be both flat belts or V-belts.

Specifically, the process of the control module 109 dynamically adjusting the first real-time displacement S1 and the second real-time displacement S2 is as follows:

Example 1

Referring to FIG3 , the vertical beam 104 is in a vertical state at the initial position M, and deflects to the right during the rightward movement of the first conveyor belt 106, that is, the deflection direction is consistent with the forward direction of the vertical beam 104, and the upper end of the vertical beam 104 is defined to be located at point P, and the lower end is located at point Q, and point P is to the right of point Q. The first encoder 117 reads the first grating 119 to obtain the first real-time displacement S1 of the upper end of the vertical beam 104 from point M to point P; the second encoder 118 obtains the second real-time displacement S2 of the lower end of the vertical beam 104 from point M to point Q by reading the second grating 120. The first encoder 117 and the second encoder 118 send the first real-time displacement S1 and the second real-time displacement S2 to the control module 109 respectively. After the control module 109 determines that the first real-time displacement S1 is greater than the second real-time displacement S2, it sends a control signal to adjust the rotation speed of the first motor 108 to be less than the rotation speed of the second motor 111, so that the horizontal movement speed of the first conveyor belt 106 is less than the horizontal movement speed of the second conveyor belt 112. After time t1, the upper and lower ends of the vertical beam 104 both reach R. The first encoder 117 obtains the first real-time displacement S1 of the upper end of the vertical beam 104 again by reading the first grating 119; the second encoder 118 obtains the second real-time displacement S2 of the lower end of the vertical beam 104 again by reading the second grating 120. The first encoder 117 and the second encoder 118 respectively send the first real-time displacement S1 and the second real-time displacement S2 to the control module 109 again. The control module 109 determines that S1=S2 when both the upper and lower ends of the vertical beam 104 are at R, and sends a control signal again to adjust the speed of the first motor 108 to be equal to the speed of the second motor 111, so that the horizontal movement speed of the first conveyor belt 106 is equal to the horizontal movement speed of the second conveyor belt 112. In the subsequent stroke, if the vertical beam 104 deflects several times again (it may deflect to the right or to the left. If it deflects to the left, the control module's control ideas for the vertical beam 104 are detailed in Example 2 below), the control module 109 will make real-time adjustments to ensure that the vertical beam 104 recovers from the deflected state to the vertical state in the shortest time. That is, during the entire horizontal movement process, the vertical beam is in a state of vertical (initial position)-deflection-vertical-deflection-vertical, which is constantly adjusted, thereby providing a guarantee for the accurate exposure of the image by the multiple lasers arranged on the vertical beam 104.

Example 2

Referring to FIG4 , the vertical beam 104 is in a vertical state at the initial position M, and deflects to the left during the forward movement, that is, the deflection direction is opposite to the forward direction of the vertical beam 104. At this time, the upper end of the vertical beam 104 is located at point U, and the lower end is located at point V, and point U lags behind point V. The first encoder 117 reads the first grating 119 to obtain the first real-time displacement S1 of the upper end of the vertical beam 104 from point M to point U; the second encoder 118 obtains the second real-time displacement S2 of the lower end of the vertical beam 104 from point M to point V by reading the second grating 120. The first encoder 117 and the second encoder 118 send the first real-time displacement S1 and the second real-time displacement S2 to the control module 109 respectively. After the control module 109 determines that the first real-time displacement S1 is greater than the second real-time displacement S2, it sends a control signal to adjust the speed of the first motor 108 to be greater than the speed of the second motor 111, so that the horizontal movement speed of the first conveyor belt 106 is greater than the horizontal movement speed of the second conveyor belt 112. After time t2, both the upper and lower ends of the vertical beam 104 reach W, and the first encoder 117 reads the first grating 119, and obtains the first real-time displacement S1 of the upper end of the vertical beam 104 from point M to point W again; the second encoder 118 reads the second grating 120, and obtains the second real-time displacement S2 of the lower end of the vertical beam 104 from point M to point W again. The first encoder 117 and the second encoder 118 send the first real-time displacement S1 and the second real-time displacement S2 to the control module 109 again, respectively. The control module 109 determines that S1=S2, and sends a control signal again to adjust the speed of the first motor 108 to be equal to the speed of the second motor 111, so that the horizontal movement speed of the first conveyor belt 106 is equal to the horizontal movement speed of the second conveyor belt 112. In the subsequent stroke, if the vertical beam 104 deflects several times again (it may deflect to the right or to the left. If it deflects to the right, the control module's control ideas for the vertical beam 104 are detailed in the above embodiment 1), the control module 109 will make real-time adjustments again, that is, the vertical beam is in the process of continuous adjustment of vertical (initial position)-deflection-vertical-deflection-vertical, which ensures that the vertical beam 104 recovers from the deflected state to the vertical state in the shortest time, thereby providing a guarantee for the accurate exposure of the image by the multiple lasers arranged on the vertical beam 104.

It should be noted that in Figures 3 and 4, since the first real-time displacement S1 and the second real-time displacement S2 are variables that change with time, in Figure 3, when the upper end of the vertical beam 104 is at P and R, the first real-time displacement is marked as S1, and when the lower end of the vertical beam 104 is at Q and R, the second real-time displacement is marked as S2; in Figure 4, when the upper end of the vertical beam 104 is at U and W, the first real-time displacement is marked as S1, and when the lower end of the vertical beam 104 is at V and W, the second real-time displacement is marked as S2.

3 and 4, the first motor 108 and the second motor 111 are servo motors of the same specification. The first motor 108 and the second motor 111 are set to the same specification to facilitate the adjustment of the control module 109 so that the rotation speeds of the first motor 108 and the second motor 111 are consistent, the speeds of the first conveyor belt 106 and the second conveyor belt 112 are consistent, and the vertical beam is kept in a vertical state as much as possible.

3 and 4 , in some embodiments, the first driving wheel 115 and the first driven wheel 107 are preferably spur gears of the same specification; the second driving wheel 116 and the second driven wheel 113 are spur gears of the same specification.

In the present application, the control module 109 is a chip processor capable of data storage, transmission and processing.

3 and 4 , a first slider 121 is provided at the upper end of the vertical beam 104 , and a second slider 122 is provided at the lower end. The upper end of the vertical beam 104 moves horizontally on the first horizontal guide rail 101 through the first slider 121 , and the lower end of the vertical beam 104 moves horizontally on the second horizontal guide rail 102 through the second slider 122 .

Referring to FIG5 , the present invention further provides a method for improving image exposure accuracy, comprising:

Step 1: The control module obtains a first real-time displacement S1 of the upper end of the vertical beam of the laser direct writing device and a second real-time displacement S2 of the lower end of the vertical beam;

Step 2: The control module compares the first real-time displacement S1 and the second real-time displacement S2, and dynamically adjusts the speed of the upper end and the speed of the lower end of the vertical beam, so that the first real-time displacement S1 and the second real-time displacement S2 maintain dynamic equality, thereby providing a guarantee for the accurate exposure of the image by the multiple lasers distributed in a row on the vertical beam;

Among them, S1 and S2 are variables that change with time, and the initial positions of the upper end and the lower end of the vertical beam in the horizontal direction are the same.

Specifically, referring to FIG. 3 and FIG. 4 , the first real-time displacement S1 and the second real-time displacement S2 are obtained by:

The first encoder 117 arranged at the upper end of the vertical beam 104 reads the first grating 119 arranged on the vertical plate 103 and located above the first encoder 117, and obtains the first real-time displacement S1 of the upper end of the vertical beam 104; the second encoder 118 arranged at the lower end of the vertical beam 104 reads the second grating 120 arranged on the vertical plate 103 and located below the second encoder 118, and obtains the second real-time displacement S2 of the lower end of the vertical beam 104.

In step 2, the control module compares the sizes of the first real-time displacement S1 and the second real-time displacement S2, and dynamically adjusts the speed of the upper end and the speed of the lower end of the vertical beam so that the first real-time displacement S1 and the second real-time displacement S2 are dynamically equal. The control method is shown in the previous embodiments 1 and 2, and will not be repeated here.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A device for improving image exposure accuracy, used in a laser direct writing device, characterized by comprising: a first horizontal guide rail, a first transmission assembly, a second transmission assembly and a second horizontal guide rail arranged in parallel from top to bottom on the same side of a vertical plate of the laser direct writing device; The upper end of a vertical beam is detachably connected to the first transmission assembly, and the lower end is detachably connected to the second transmission assembly. A first encoder is provided at the upper end of the vertical beam, and a second encoder is provided at the lower end of the vertical beam. A first grating is provided at the upper end of the vertical plate located at the first horizontal guide rail, and a second grating is provided at the lower end of the vertical plate located at the second horizontal guide rail. A control module simultaneously controls the first transmission assembly and the second transmission assembly to respectively drive the upper end and the lower end of the vertical beam to move on the first horizontal guide rail and the second horizontal guide rail, the first encoder reads the first grating to obtain the first real-time displacement S1 of the upper end of the vertical beam, the second encoder reads the second grating to obtain the second real-time displacement S2 of the lower end of the vertical beam, and the control module dynamically adjusts the first real-time displacement S1 and the second real-time displacement S2, So that: the first real-time displacement S1 and the second real-time displacement S2 remain dynamically equal, and the vertical beam is in a vertical state as much as possible during the horizontal movement, so as to provide a guarantee for the accurate exposure of the image by the plurality of lasers distributed in a column on the vertical beam; The first real-time displacement S1 and the second real-time displacement S2 are variables that change with time, and the initial positions of the upper end and the lower end of the vertical beam in the horizontal direction are the same. 2. The device according to claim 1, characterized in that the first transmission assembly comprises a first motor, a first driving wheel, a first conveyor belt and a first driven wheel; the first driving wheel is sleeved on the output shaft of the first motor, the two ends of the first conveyor belt are sleeved on the first driving wheel and the first driven wheel respectively, and the upper end of the vertical beam is detachably connected to the first conveyor belt; The second transmission assembly includes a second motor, a second driving wheel, a second conveyor belt and a second driven wheel. The second driving wheel is sleeved on the output shaft of the second motor. The two ends of the second conveyor belt are respectively sleeved on the second driving wheel and the second driven wheel. The lower end of the vertical beam is detachably connected to the second conveyor belt. 3. The device according to claim 2, characterized in that the control module dynamically adjusts the first real-time displacement S1 and the second real-time displacement S2, and the dynamic adjustment steps are: The control module simultaneously receives the first real-time displacement S1 sent by the first encoder and the second real-time displacement S2 sent by the second encoder, and compares the sizes: If the vertical beam deflects to the right, S1>S2, and the control module controls the speed of the first motor to be lower than that of the second motor, until after time t1, the first encoder and the second encoder send the first real-time displacement S1 and the second real-time displacement S2 to the control module again, and after the control module compares S1=S2, the speed of the first motor is adjusted to be equal to the speed of the second motor; If S1=S2, the vertical beam remains in a vertical state, and the control module controls the speed of the first motor to be equal to the speed of the second motor; If the vertical beam deflects to the left, S1＜S2, and the control module controls the speed of the first motor to be greater than that of the second motor until time t2 has passed, when the first encoder and the second encoder send S1 and S2 to the control module again respectively. After the control module compares S1=S2, it adjusts the speed of the first motor to be equal to that of the second motor. 4. The device as claimed in claim 2, characterized in that the first motor and the second motor are both servo motors and have the same specifications. 5. The device as claimed in claim 2, characterized in that the first driving wheel and the first driven wheel are both spur gears of the same specifications; the second driving wheel and the second driven wheel are both spur gears of the same specifications; the first driving wheel and the second driving wheel have the same specifications. The device according to claim 1 , wherein the control module is a chip processor. 7. The device as described in claim 1 is characterized in that a first slider is provided at the upper end of the vertical beam and a second slider is provided at the lower end, the upper end of the vertical beam moves horizontally on the first horizontal guide rail through the first slider, and the lower end of the vertical beam moves horizontally on the second horizontal guide rail through the second slider. 8. A method for improving image exposure accuracy, comprising: The control module obtains a first real-time displacement S1 of the upper end of the vertical beam of the laser direct writing device and a second real-time displacement S2 of the lower end of the vertical beam; The control module compares the magnitudes of the first real-time displacement S1 and the second real-time displacement S2, and dynamically adjusts the speed of the upper end portion and the speed of the lower end portion of the vertical beam, so that the first real-time displacement S1 and the second real-time displacement S2 maintain dynamic equality, thereby providing a guarantee for the accurate exposure of the image by the plurality of lasers distributed in a row on the vertical beam; Wherein, S1 and S2 are variables that change with time, and the initial positions of the upper end and the lower end of the vertical beam in the horizontal direction are the same. 9. The method according to claim 8, characterized in that the control module compares the magnitudes of the first real-time displacement S1 and the second real-time displacement S2, and adjusts the speed of the upper end portion and the speed of the lower end portion of the vertical beam so that the first real-time displacement S1 and the second real-time displacement S2 maintain dynamic equality, specifically comprising: The control module simultaneously receives the first real-time displacement S1 sent by the first encoder of the laser direct writing device and the second real-time displacement S2 sent by the second encoder of the laser direct writing device, and compares the sizes: If the vertical beam deflects to the right, S1>S2, the control module controls the speed of the first motor of the laser direct writing device to be lower than the speed of the second motor of the laser direct writing device, until after time t1, the first encoder and the second encoder send the first real-time displacement S1 and the second real-time displacement S2 to the control module again, and after the control module compares S1=S2, it adjusts the speed of the first motor to be equal to the speed of the second motor; If the vertical beam remains in a vertical state, S1=S2, the control module controls the speed of the first motor to be equal to the speed of the second motor; If the vertical beam deflects to the left, S1＜S2, the control module controls the speed of the first motor to be greater than the speed of the second motor until time t2 has passed, the first encoder and the second encoder again send the first real-time displacement S1 and the second real-time displacement S2 to the control module respectively, and after the control module compares the first real-time displacement S1 and the second real-time displacement S2 to be equal, the speed of the first motor is adjusted to be equal to the speed of the second motor. 10. The method according to claim 9, characterized in that: the first real-time displacement S1 and the second real-time displacement S2 are obtained by: The first encoder reads a first grating arranged on the vertical plate of the laser direct writing device and located above the first encoder to obtain a first real-time displacement S1 of the upper end portion of the vertical beam; the second encoder arranged on the lower end portion of the vertical beam reads a second grating arranged on the vertical plate and located below the second encoder to obtain a second real-time displacement S2 of the lower end portion of the vertical beam.