CN114103507B

CN114103507B - Film forming method, film forming equipment and display device

Info

Publication number: CN114103507B
Application number: CN202111182735.7A
Authority: CN
Inventors: 佘小将
Original assignee: Xiamen Weiya Intelligence Technology Co ltd
Current assignee: Xiamen Weiya Intelligent Technology Co.,Ltd.
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-07-26
Anticipated expiration: 2041-10-11
Also published as: CN114953796A; CN114103507A; CN114953796B

Abstract

The invention discloses a film forming method, a film forming apparatus and a display device, wherein the film forming method comprises the following steps: performing partition processing on the image to be printed according to the film thickness to obtain area images, wherein each area image comprises contour information and gray information; generating a printing file according to the preset sequence of the area images, converting image-text information of the printing file into an analog signal and sending the analog signal to a nozzle driver; the spray head driver controls the spray head to execute ink-jet printing according to the analog signal, wherein the analog signal corresponding to the outline information is used for controlling the moving track of the spray head; the analog signal corresponding to the gray information is used for controlling the glue filling density of the spray head; the film forming equipment adopting the film forming method and the display device manufactured by the film forming method are also disclosed, and the technical problem that the climbing width of the film forming edge of the existing film forming method cannot be accurately controlled is solved.

Description

Film forming method, film forming equipment and display device

Technical Field

The invention relates to the technical field of water gel coating, in particular to a film forming method, film forming equipment applying the method and a display device manufactured by adopting the film forming method.

Background

Ocr (optical Clear resin) is one type of optical glue, also called liquid optical glue, optical water glue or LOCA, since the glue is in a liquid state. The glue is colorless and transparent after being cured, has the light transmittance of more than 98 percent, and has the characteristics of small curing shrinkage rate, yellowing resistance and the like. Compared with the traditional OCA, the cost of the raw materials for the water gel coating is more price-oriented, so that the water gel coating is more and more widely applied.

However, in the panel industry, the climbing width of the edge of the hydrogel film-forming determines how wide the ink needs to be at the edge of the display screen to meet the optical performance after the rear-section bonding, which means that the narrower the climbing width of the edge after the hydrogel film-forming is, the larger the screen display area ratio under the condition of the display screen with the same external dimension is.

The traditional glue manufacturing process mainly comprises the following steps:

and (3) a dispensing process: the glue is spread on the surface of the product in a double-Y-shaped mode by adopting a glue dispensing mode, glue is uniformly coated on the product in a self-flowing flat ground mode of a heating platform, and edge climbing overflows in the edge climbing process in the process of waiting for the water glue to flow flat, and finally the edge climbing is about 5-6 mm.

Slit coating process: compared with a glue dispensing mode, a Slit Coating (Slit Coating) process adopts film forming speed improvement, the climbing width of the edge after film forming is mainly affected by the surface tension of glue and cannot be adjusted, and the edge can be pre-fixed as soon as possible after film forming to reduce the edge climbing and flowing away and leveling.

Therefore, a technology for realizing the narrow climbing of the edge after film forming needs to be invented to overcome the problem that the climbing width after film forming cannot be accurately controlled due to the characteristics of glue.

Disclosure of Invention

The invention mainly aims to provide a film forming method, film forming equipment and a display device, and aims to solve the technical problem that the climbing width of a film forming edge cannot be accurately controlled in the conventional film forming method.

In order to achieve the above object, the present invention provides a film forming method comprising the steps of:

performing partition processing on the image to be printed according to the film thickness to obtain area images, wherein each area image comprises contour information and gray information;

generating a printing file according to the preset sequence of the area images, converting image-text information of the printing file into an analog signal and sending the analog signal to a nozzle driver;

the spray head driver controls the spray head to execute ink-jet printing according to the analog signal, wherein the analog signal corresponding to the outline information is used for controlling the moving track of the spray head; and the analog signal corresponding to the gray information is used for controlling the glue filling density of the spray head.

According to the invention, a water gel process and an ink-jet printing technology are combined, and a technology of accurately printing glue at a climbing position to fill the climbing is adopted for solving the problem that the traditional edge cannot be adjusted, so that the climbing width of the edge is narrowed as required; and the subarea printing is carried out according to the film thickness, so that the film forming thickness and the edge climbing width can be more accurate.

Preferably, the partition processing further includes:

extracting the outline of the image to be printed to obtain an outline drawing;

scaling the contour map according to the fluid tension of the aqueous gel and the surface energy of the printing substrate to obtain a scaling map;

according to the fluid acceleration and the fluid tension in the printing direction, carrying out region division on the zoom map to obtain a region image;

different gray scales are set for regions with different film thicknesses.

The invention carries out zooming treatment on the outline drawing, aims to prevent the water glue from overflowing, and can flexibly adjust the zooming tool according to the effect when the subsequent formal printing is carried out.

Further, the partitioning process is to perform gray scale adjustment according to an equal ratio or an equal difference from the printing start position to the printing end position and/or from the peripheral region to the intermediate region, and to set partitions in corner regions of the peripheral region.

According to the invention, the two dimensions are divided into areas, on one hand, according to the fluid acceleration in the printing direction, the thickness of a film generated at the printing starting position is thinner than that generated at the printing ending position, so that equal-ratio or equal-difference gray scale adjustment is required; on the other hand, the peripheral region is affected by fluid tension, the edge is cohesive, the shape is raised to form a peak, and the gray level of the part of the region is required to be lower than that of the middle region, so that the uniformity of the whole film thickness is controllable.

Preferably, the image to be printed is provided with more than one printing layer, each printing layer corresponds to more than one area image, and each printing layer can adjust a stacking mode or a splicing mode.

Further, the printing layer sets distinguishing mark information in a printing catalogue according to a preset printing sequence; when more than two area images are included in the same printing image layer, the more than two area images have different gray scale information.

Preferably, the partitioning process is to partition an edge area of the image to be printed.

Preferably, the method further comprises a preprinting step, specifically comprising:

in the preset edge area of the image to be printed, carrying out pre-partitioning according to equal ratio or equal difference from the printing starting position to the printing ending position and/or from the peripheral area to the middle area, setting uniform gray information and glue filling density for each area image of the pre-partitioning, and carrying out pre-printing;

and measuring the film thickness according to the pre-printing result, performing partition processing according to the measured film thickness, and setting different gray scale information for different area images.

Preferably, the adjustment of the edge climbing width is further performed according to the film thickness, and the method specifically comprises the following steps:

and performing film thickness measurement on the printing result, resetting the edge area according to the measurement result, re-partitioning along the printing starting position to the printing ending position and/or along the peripheral area to the middle area according to the position and the thickness distribution of the reset edge area according to equal ratio or equal difference, and setting different gray scale information and filling density for each area image of the re-partitioning.

According to the method, through the preprinting step and the adjusting step, the edge climbing width can be controlled more accurately, and the edge climbing width can be adjusted more finely, so that the screen occupation ratio is improved.

Corresponding to the film forming method, the invention provides a film forming apparatus comprising a processor, a nozzle driver, and a nozzle, wherein:

the processor performs partition processing on the image to be printed according to the film thickness to obtain area images, wherein each area image comprises contour information and gray information; generating a printing file according to the preset sequence of the area images, converting the image-text information of the printing file into an analog signal and sending the analog signal to a nozzle driver;

In order to achieve the above object, the present invention also provides a display device using the film formation method as described above.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention. In the drawings:

FIG. 1 is a schematic view of a pre-staging scheme for a film-forming process of the present invention;

FIG. 2 is a schematic view of a one-time division scheme of the film forming method of the present invention;

FIG. 3 is a schematic view of a secondary partitioning scheme of the film forming method of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

First embodiment (divisional printing based on film thickness obtained from empirical data or simulation data)

A film forming method according to the present embodiment includes the steps of:

performing partition processing on the image to be printed according to the film thickness to obtain area images, wherein each area image comprises contour information and gray information; the film thickness can be obtained according to empirical data or a simulation experiment; setting different gray information for the area images corresponding to different film thicknesses so as to control different glue filling densities;

generating a printing file according to the preset sequence of the area images, converting the image-text information of the printing file into an analog signal and sending the analog signal to a spray head driver; the print file may be one print file generated in a preset order, or a plurality of print files are printed in order;

the spray head driver controls the spray head to execute ink-jet printing according to the analog signal, wherein the analog signal corresponding to the outline information is used for controlling the moving track of the spray head; and the analog signal corresponding to the gray scale information is used for controlling the glue filling density of the spray head.

In this embodiment, the image to be printed may be a CAD drawing or other engineering drawing.

In this embodiment, the partitioning process is to partition an edge area of the image to be printed. The partitioning process further comprises:

extracting the outer contour of the image to be printed to obtain a contour map;

carrying out scaling processing on the outline according to the fluid tension of the glue and the surface energy of the printing substrate to obtain a scaling image; the scaling treatment can prevent the water glue from overflowing; the zooming processing is processed through a zooming tool, and can be flexibly adjusted according to effects when the zooming tool is used for printing in a subsequent formal mode;

different gray scales are set for regions of different film thicknesses.

In the partitioning process, two dimensions are mainly followed for region partitioning: firstly, according to the fluid acceleration in the printing direction, the printing starting position is thinner than the film thickness generated at the printing ending position, so that the gray scale adjustment with equal ratio or equal difference is required; and secondly, the peripheral area is influenced by fluid tension, the edge can be cohesive, the appearance can be raised to form a peak, the gray level of the part of area is lower than that of the middle area, and the uniformity of the whole film thickness is controllable. In this embodiment, the gradation is adjusted in accordance with the equal ratio or the equal difference from the printing start position to the printing end position and/or from the peripheral area to the middle area. Preferably, the corner joint area of the peripheral area can be provided with partitions.

The image to be printed is provided with more than one printing layer, and each layer is provided with corresponding outline information and gray information; each printing layer corresponds to more than one area image, and the stacking mode or the splicing mode can be adjusted for each printing layer. Different printing files can be generated aiming at different areas, the layer stacking/splicing mode is adjusted according to the requirement in the process of manufacturing the image layer, and the printing is executed according to the preset image layer and the sequence in the printing process.

In this embodiment, the print layer sets distinguishing flag information in a print directory according to a preset print order; when more than two area images are included in the same printing image layer, the more than two area images have different gray information; therefore, if there are multiple regions in the same layer and different gray scales, it is not necessary to carry the partition mark information.

In the case of ink jet printing, the filling density is adjusted by performing gray level adjustment on the layer, and after the layer adjustment is completed, an RIP operation (an operation of converting text information into digital analog quantity) needs to be performed, and the inkjet head needs to receive the information after RIP through the inkjet head driver to perform ink jet printing.

In this embodiment, the print file is a plurality of image layers with different gray-level fills and different shapes, wherein different glue filling densities mapped by different gray-levels need to be processed by RIP operation in the middle, the driving voltages and pulse width times generated by RIP with different gray-levels are different, and the printed glue densities are different. A plurality of printing files in different areas can be simultaneously imported, the same layer is simultaneously printed, different layers are printed according to the information carrying the partition marks, and the layers do not need to be imported for many times.

Second embodiment (divisional printing based on film thickness measured by preprinting)

In this embodiment, the method further includes a preprinting step, specifically including:

in the preset edge area of the image to be printed, carrying out pre-partitioning according to equal ratio or equal difference from the printing starting position to the printing ending position and/or from the peripheral area to the middle area, and setting uniform gray information and glue filling density for each area image of the pre-partitioning and carrying out pre-printing;

As shown in fig. 1 and 2, the present embodiment at least includes the steps of pre-printing and main printing:

a preprinting step:

dividing 6 areas in the edge area, uniformly setting the glue filling density to be 1, obtaining the size of the edge climbing position after film forming through film thickness measurement after printing one film, and dividing the film forming climbing section which is not printed out in a partitioned mode into 6 areas according to the measured value, wherein the edge climbing width of the printed film is D1 as shown in figure 1.

A formal printing step:

setting corresponding glue filling density according to the measured climbing position and thickness after film forming and according to the subareas: the region 1 to 2 filling density was set to 0.6, the region 2 to 3 filling density was set to 0.5, the region 3 to 4 filling density was set to 0.4, the region 4 to 5 filling density was set to 0.45, and the region 5 to 6 filling density was set to 0.5, and a film was printed, as shown in fig. 2, with an edge slope width D2.

Third embodiment (adjustment printing based on preprinting result)

In addition to the first embodiment or the second embodiment, the present embodiment further performs adjustment of the edge climbing width according to the film thickness.

Adjusting printing:

For example, the film thickness measurement is performed on the print result of fig. 2, and the edge climbing position is precisely printed in such a manner that the secondary printing is performed based on the measurement result, so that the edge climbing is narrowed again, and the divisional printing is performed again from the edge climbing divisional area after the first film formation. The final partition width is influenced by the nozzle printing hole spacing. An example of the Konika Menteng KM1024i nozzle has a nozzle hole pitch of 75 microns and a nozzle hole size of 100 microns, and preferably, the minimum pitch is 0.1mm, and a film with a film-forming climbing width of 750 microns can be printed, as shown in FIG. 3, the film-formed by printing has an edge climbing width of D3.

Fourth embodiment (film Forming apparatus)

Corresponding to the film forming method, the present embodiment provides a film forming apparatus including a processor, a head driver, and a head, wherein:

Preferably, the film forming device may further include a memory for storing an image to be printed and a print file, or the film forming device uploads the image to be printed and the print file to a cloud server through a communication module. The remaining working processes of this embodiment are basically similar to those of the first to third embodiments, and are not described herein again.

Fifth embodiment (display device)

The present invention also provides a display device using the film formation method as described above.

The display device includes: a display device having a film structure, such as a mobile phone, a digital camera, or a tablet computer, may include components, such as a memory, a processor, an input unit, a display unit, and a power supply.

The input unit may include a touch-sensitive surface (e.g., a touch display screen) and other input display devices. The display unit may be used to display information input by or provided to a user and various graphical user interfaces of the display device, which may be composed of graphics, text, icons, video, and any combination thereof. The Display unit may include a Display panel, and optionally, the Display panel may be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor to determine the type of touch event, and the processor then provides a corresponding visual output on the display panel according to the type of touch event.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the embodiments of the film forming apparatus and the display device, since they are substantially similar to the embodiments of the method, the description is simple, and reference may be made to the partial description of the embodiments of the method for relevant points.

Also, in this document, the terms "include", "include" or any other variation thereof are intended to cover a non-exclusive inclusion, so that a process, method, article or display apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such process, method, article or display apparatus. Without further limitation, an element identified by the phrase "comprising an … …" does not exclude the presence of additional identical elements in the process, method, article, or display device that comprises the element.

While the foregoing specification illustrates and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the precise forms disclosed herein and is not to be construed as limited to other embodiments, but may be used in various other combinations, modifications, and environments and may be modified within the scope of the inventive concept as expressed herein, by the above teachings or by the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A film forming method is characterized by comprising the following steps:

generating a printing file according to the preset sequence of the area images, converting the image-text information of the printing file into an analog signal and sending the analog signal to a spray head driver;

the spray head driver controls the spray head to execute ink-jet printing according to the analog signal, wherein the analog signal corresponding to the outline information is used for controlling the moving track of the spray head; the analog signal corresponding to the gray information is used for controlling the glue filling density of the spray head;

and, the partitioning process further comprises:

carrying out scaling processing on the outline according to the fluid tension of the glue and the surface energy of the printing substrate to obtain a scaling image;

different gray scales are set for regions with different film thicknesses.

2. A film forming method according to claim 1, wherein: the partition processing is to perform gray scale adjustment according to equal ratio or equal difference from the printing start position to the printing end position and/or from the peripheral area to the middle area, and to set partitions in corner joints of the peripheral area.

3. The film forming method according to claim 1, wherein: the image to be printed is provided with more than one printing layer, each printing layer corresponds to more than one area image, and the stacking mode or the splicing mode of each printing layer can be adjusted.

4. A film forming method according to claim 3, wherein: the printing layer sets distinguishing mark information in a printing catalogue according to a preset printing sequence; when more than two area images are included in the same printing image layer, the more than two area images have different gray scale information.

5. A film forming method according to claim 1, wherein: the partitioning process is to partition an edge area of the image to be printed.

6. The film forming method according to claim 1, further comprising a preprinting step before the partition processing, specifically comprising:

7. A film forming apparatus comprising a processor, a head driver, a head, wherein:

the processor performs partition processing on the image to be printed according to the film thickness to obtain area images, wherein each area image comprises contour information and gray information; generating a printing file according to the preset sequence of the area images, converting image-text information of the printing file into an analog signal and sending the analog signal to a nozzle driver;

and, the partitioning process further comprises:

extracting the outline of the image to be printed to obtain an outline drawing;

different gray scales are set for regions with different film thicknesses.

8. A display device, wherein the film formation method according to any one of claims 1 to 6 is used.