CN111415584A - Display device attaching process and display device - Google Patents
Display device attaching process and display device Download PDFInfo
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- CN111415584A CN111415584A CN202010146334.5A CN202010146334A CN111415584A CN 111415584 A CN111415584 A CN 111415584A CN 202010146334 A CN202010146334 A CN 202010146334A CN 111415584 A CN111415584 A CN 111415584A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
Abstract
The invention discloses a display device attaching process and a display device, which comprise a display panel and a protection panel, wherein an ink area of the protection panel is provided with a light hole; the display device is attached by an attaching process. Because the printing ink area of the protection panel is provided with the light holes for ultraviolet rays to pass through, the ultraviolet rays can irradiate the laminating adhesive through the light holes, and the defect that the ultraviolet rays cannot reach the laminating adhesive due to blocking of the printing ink area is overcome, so that the curing rate of the laminating adhesive is improved, and the laminating effect of the display device is optimized.
Description
Technical Field
The invention relates to a display screen and a display screen laminating process, in particular to a display device laminating process and a display device.
Background
Display device's display screen generally includes protective glass, touch screen, display module assembly etc. need laminate in order to form complete display device between each part, it needs to solidify the laminating glue to laminate after accomplishing between the part among the display device, realize that the laminating glues both sides and adapting unit's is fixed, because display device's display panel is opaque, when carrying out the UV solidification, the ultraviolet ray is sheltered from and can not shine the laminating glue, lead to the solidification rate that the laminating was glued relatively poor, influence display device's laminating effect.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a display device attaching process and a display device, which can improve the attaching effect of the display device.
In a first aspect, an embodiment of the present invention provides a display device attaching process, including:
s10, arranging a display panel and a protection panel, wherein the ink area of the protection panel is provided with a light hole;
s20, attaching an adhesive to the display panel or the protection panel, and attaching the display panel and the protection panel;
s30, carrying out hot pressing on the display panel and the bonding area of the protection panel in a vacuum environment;
and S40, curing the bonding area of the display panel and the protective panel.
The display device attaching process in the embodiment of the invention at least has the following beneficial effects:
because the printing ink area of the protection panel is provided with the light holes for ultraviolet rays to pass through, the ultraviolet rays can irradiate the laminating adhesive through the light holes, and the defect that the ultraviolet rays cannot reach the laminating adhesive due to blocking of the printing ink area is overcome, so that the curing rate of the laminating adhesive is improved, and the laminating effect of the display device is optimized.
According to the display device attaching process of other embodiments of the present invention, in the step S20, a frame-shaped attaching glue is provided, the attaching glue is attached to the protective panel or the display panel, and boundaries on two sides of the attaching glue do not exceed a boundary of an ink area of the protective panel.
According to the display device attaching process of other embodiments of the present invention, in the step S20, a planar attaching glue is disposed, and the attaching glue is attached to the protective panel or the display panel, wherein an outer boundary of the attaching glue does not exceed a boundary of an ink area of the protective panel.
According to another embodiment of the present invention, the light-transmitting holes are micro holes arranged in an array on the ink region.
According to the display device attaching process of the other embodiments of the present invention, the light-transmitting hole is formed around the ink region.
According to the display device attaching process of the other embodiments of the present invention, the step S40 includes pre-curing the attaching position of the display panel and the protective panel and then fully curing the attaching position.
According to the display device attaching process of the other embodiments of the present invention, the pre-curing and the full curing are performed by UV curing.
According to the display device attaching process of the other embodiments of the present invention, before the step of S40, a preliminary inspection is performed on the attachment position of the display panel and the protective panel, and a final inspection is performed after the step of S40.
According to the display device attaching process of the other embodiments of the present invention, after the step S30, a joint of the display panel and the protective panel is subjected to defoaming treatment.
In a second aspect, an embodiment of the present invention provides a display device, including a display panel, a protection panel, and a bonding adhesive, where the bonding adhesive is located between the display panel and the protection panel, and the display panel and the protection panel are bonded by using the display device bonding process.
The display device in the embodiment of the invention at least has the following beneficial effects:
make the ultraviolet ray can shine the laminating through the light trap and glue through setting up the light trap, make the laminating glue solidification, overcome the ultraviolet ray because of the protection panel ink district and display panel shelter from the defect that can not realize the solidification to improve the solidification rate that the laminating glued, optimize display panel and protection panel's laminating effect.
Drawings
FIG. 1 is a schematic view illustrating a display panel and a protection panel;
FIG. 2 is a front view of a first embodiment of the protective panel of FIG. 1;
FIG. 3 is a front view of a second embodiment of the protective panel of FIG. 1;
FIG. 4 is a schematic view of the display panel and the protection panel in another embodiment.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the embodiments of the present invention, if an orientation description is referred to, for example, the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the embodiments of the present invention, if a feature is referred to as being "disposed", "fixed", "connected", or "mounted" to another feature, it may be directly disposed, fixed, or connected to the other feature or may be indirectly disposed, fixed, connected, or mounted to the other feature. In the description of the embodiments of the present invention, if "a number" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "greater than", "lower" or "inner" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
Fig. 1 shows a schematic diagram of a process of attaching a display panel to a protective panel, fig. 2 shows a schematic structural diagram of an embodiment of the protective panel, and referring to fig. 1 and fig. 2, a process of attaching the display device in this embodiment includes the following steps:
s10, arranging a display panel and a protection panel, wherein the ink area of the protection panel is provided with a light hole;
s20, attaching the adhesive on the display panel or the protection panel, and attaching the display panel and the protection panel;
s30, carrying out hot pressing on the display panel and the bonding area of the protection panel;
and S40, curing the bonding area of the display panel and the protection panel.
Specifically, a prepared adhesive is attached to the display panel or the protection panel, and after the display panel is attached to the protection panel, two sides of the adhesive are respectively attached to the display panel and the protection panel, so that the display panel and the protection panel can be conveniently bonded by the subsequent adhesive; in the hot pressing process, the bonding glue is converted into a molten state and is paved between the display panel and the protection panel, so that the display panel and the protection panel are bonded more tightly. And then, curing, wherein the protective panel in the embodiment is provided with light holes in the ink area, ultraviolet rays can irradiate the laminating adhesive through the light holes, and the laminating adhesive generates a crosslinking reaction, so that the protective panel is stably connected with the display panel.
Because the printing ink district of protection panel is provided with the light trap that supplies the ultraviolet ray to pass in this embodiment, make the ultraviolet ray can shine to the laminating glue through the light trap, overcome because the defect that the ultraviolet ray can not reach the laminating glue that blocks in printing ink district to the solidification rate of laminating glue has been improved, display device's laminating effect is optimized.
It should be noted that the display panel in this embodiment may be a display module with a touch function or a display module without touch or other functions, and the protection panel may be a glass panel, a plastic panel, or a functional panel with a touch function.
In addition, the Adhesive in this embodiment may be a UV-curable optically Clear Adhesive film (TOCA), which has a high light transmittance and a good ductility, can prevent the Adhesive film from springing back and warping and deforming, has a strong self-Adhesive force, can be firmly adhered to the display panel and the protection panel, and improves the stability of the adhesion between the display panel and the protection panel.
Referring to fig. 2, the light holes in this embodiment are arranged as the micro holes arranged in an array, the micro holes are uniformly distributed in the ink area of the protection panel, and when UV curing is performed, ultraviolet rays can irradiate the bonding adhesive through the light holes. The size of the micropore can be set reasonably according to the actual laminating environment, and the shape and the size of the light hole can be set into different shapes according to the size of the display panel and the protection panel, the size of the ink area and the specific laminating process.
Referring to fig. 3, in this embodiment, another shape of light-transmitting hole is provided, the light-transmitting hole is in a groove shape, and the light-transmitting hole is provided with a circle along the ink area of the protection panel, and the light-transmitting hole on each side is communicated with the light-transmitting hole on the side adjacent to the side, so as to ensure that the corners of the protection panel can also be irradiated by ultraviolet rays, and the curing rate is improved. The width of the light hole can be changed according to the size of the ink area on the premise of ensuring the passing of ultraviolet rays, and the light hole can be arranged in a linear shape.
In the step S20, a bonding device may be used to bond the bonding glue, specifically, the display panel and the protection panel are first positioned by a positioning device on the bonding device, such as CCD positioning, mechanical positioning, and the like, to ensure the bonding precision of the subsequent bonding glue; and then, the gluing part on the gluing equipment executes the gluing action to adhere the gluing glue to the display panel or the protection panel.
After the laminating adhesive is laminated, the laminating adhesive needs to be cut, taking the laminating adhesive laminated on the protective panel as an example, when the laminating adhesive is laminated, the laminating adhesive can be laminated for a circle along the ink area of the protective panel and then cut, or after the laminating adhesive is laminated and cut along the ink area on one side of the protective panel, the laminating adhesive can be laminated for the ink area on the other side of the protective panel, and the process is circulated until the laminating adhesive is laminated for a circle along the ink of the display panel; or cutting the bonding glue into a frame shape (shown in fig. 1) according to the size and shape of the protective panel or the display panel in advance, and then directly attaching the bonding glue to the protective panel or the display panel.
When carrying out the laminating between display panel and the protection panel, tear earlier and remove the laminating and glue earlier and leave the type membrane from gluing, fix a position display panel and protection panel again, counterpoint and the laminating back at display panel and protection panel, under the gluey effect of laminating, realize the preliminary bonding between the two fixed. And can roll extrusion to the laminating of laminating completion to guarantee the stable attached of laminating glue and the planarization of laminating on display panel and protection panel is glued to the laminating.
In addition, referring to fig. 4, the bonding adhesive in this embodiment may also be a planar adhesive film, the adhesive film may be attached to the display panel or the protection panel to completely cover the display panel or the protection panel, and during UV curing, ultraviolet rays may irradiate the bonding adhesive through the light holes in the display area and the ink area of the protection panel, so as to achieve complete bonding between the display panel and the protection panel.
The laminating process in the embodiment is suitable for frame lamination and full lamination of the adhesive film and has high practicability. The both sides that the laminating that fig. 1 is shown is glued are not narrower than the light trap place region, and do not exceed printing ink district place region, the both sides that the laminating that fig. 4 is shown is glued are not narrower than the both sides of light trap, and do not exceed printing ink district place region, avoid having the department of not laminating between display panel and the protection panel, guarantee the laminating precision, and the outside of protection panel all leaves the region that does not adhere to the laminating and glue, can provide sufficient laminating space for the laminating is glued through setting up this region, make the laminating glue can stabilize bonding display panel and protection panel, and can shelter from the overflow that the laminating glue produced in the hot pressing and glue, improve display device's display effect.
The hot pressing in the step S30 in this embodiment is performed in a vacuum environment, so that the bonding process is prevented from being affected by the outside air and impurities, and the bonding precision is improved. Through vacuum hot pressing, the vacuum degree of the lamination is not more than 30%, on one hand, the lamination glue is melted to realize the bonding between the display panel and the protection panel, on the other hand, a semi-vacuum closed cavity is formed between the display panel and the protection panel to ensure that the display panel and the protection panel have higher transmittance and better light refractive index, optical phenomena such as rainbow lines, dark lines, light spots and the like are prevented from existing between the display panel and the protection panel, so that the display device has better optical performance, and water vapor, fog and dust can be prevented from entering between the display panel and the protection panel; in addition, because the visual area of the display panel is not directly contacted with the protection panel, and the display panel is provided with the closed cavity, when the touch screen is subjected to a drop test, the closed cavity can provide a certain buffering effect, the touch screen is prevented from being damaged, and the pass rate of the test is improved.
And defoaming can be carried out after hot pressing, and the display panel and the protection panel are required to be pressurized in the defoaming process so as to extrude bubbles between the display panel and the protection panel, so that the display panel and the protection panel are tightly attached, and the attaching effect is optimized. The defoaming process can be performed in a defoaming device, and the process can also be performed in a vacuum environment, and bubbles generated in the bonding glue during the bonding process are removed by using pressure and temperature. In the S40, the bonding glue is subjected to a cross-linking reaction to realize the fixation between the display panel and the protection panel in a curing UV curing mode or a UV curing and thermal curing combined mode; the temperature of thermocuring is more than 60 degrees to ensure the bonding strength and stability between the display panel and the protection panel.
In the laminating process and after the laminating is finished, the laminating position of the display panel and the protection panel can be detected. If so, performing appearance detection and electrical property detection on the display panel and the protection panel after defoaming, wherein the appearance detection mainly detects whether the joint of the display panel and the protection panel has obvious non-joint parts, cracks and glue overflow or not, and the electrical property detection mainly detects whether the display panel and the protection panel which are jointed can normally display contents or not and whether the display panel and the protection panel have poor electrical connection parts or not; after curing, the above-mentioned appearance test and electrical property test may be performed. If the condition that detects not up to standard appears, can adopt organic solvent to make display panel and display panel separate in certain stable environment, and then tear the laminating and glue and laminate again, the aforesaid tears the process, does not damage display panel and protection panel, and the simple operation, carries out prosthetic prerequisite under to the laminating quality, has reduced the rejection rate.
After the step of S30, can carry out primary cure to laminating glue earlier, the UV curing mode is adopted in primary cure, and laminating glue through UV curing receives the influence of inside functional group energy and molecular structure to shrink, produces to warp and has certain adhesive force. Through carrying out preliminary solidification to the laminating glue, make and can carry out preliminary fixed between display panel and the protection panel, prevent that display panel and protection panel from taking place to remove when removing to another processing equipment or other stations, guarantee laminating precision between display panel and the protection panel and the vacuum between display panel and the protection panel.
After carrying out preliminary solidification, carry out the complete cure of second time to the laminating glue again, the UV curing mode can be adopted in the secondary curing, because of the deformation of laminating glue has produced at this in-process, consequently when carrying out subsequent complete cure, the laminating glue no longer produces the deformation, avoid the laminating glue great and excessive of diffusion degree in hot pressing or follow-up curing process, and can observe the position relation in laminating glue and display panel inner ink district before display panel and protection panel do not laminate, judge whether satisfy the requirement of agreeing, in addition, through many times of solidification, can increase laminating glue and display panel, the bonding force between the protection panel, improve the laminating quality.
In view of the fact that there may be regions that cannot be completely irradiated in the UV curing, in order to further improve the curing effect, heating curing may be performed in an auxiliary manner after the UV curing, so as to improve the curing strength of the display device and supplement the adhesive strength between the display panel and the protective panel. In the heating and curing process, a frame body with the size suitable for the frame of the display panel and the ink area of the protection panel can be adopted, and the frame body is heated and then directly hot-pressed with the display panel and the protection panel to finish the heating and curing process.
The temperature of heating and curing is not less than 60 ℃ so as to ensure the curing effect of the adhesive. Adopt the mode that UV solidification and thermosetting combine, can avoid appearing the ultraviolet ray and can not see through certain light trap and lead to the condition that the laminating glue can not solidify completely, guarantee display panel and protection panel's curing effect. The hot curing can also be carried out by adopting hot curing equipment, the hot curing equipment comprises a frame which is matched with an ink area of a display panel, the width of the frame is not less than the width of the adhesive, the adhesive can be completely covered, the frame is preheated in advance, the display panel and the protection panel which are subjected to the pre-curing are moved into the hot curing equipment and positioned, the frame presses the display panel and the protection panel downwards, the adhesive is completely cured, and the display panel and the protection panel are bonded.
After the curing is completed, the display panel and the protection panel can be finally inspected to see whether the joint part meets the joint standard, and unqualified products can be separated from the display panel by freezing and adopting a solvent method and reworked.
The invention further provides a display device, which comprises a display panel 100 and a protection panel 200, wherein the protection panel 200 comprises a first display area 210 and an ink area 220, the display panel 100 comprises a second display area 110 and a bonding area 120, the ink area 220 is provided with a light hole 221, a bonding adhesive 300 is arranged between the display panel 100 and the protection panel 200, and the bonding adhesive 300 is used for bonding the display panel 100 and the protection panel 200 to realize the fixation between the display panel 100 and the protection panel 200.
In one embodiment, referring to fig. 2, the light holes 221 are configured as micro holes arranged in an array, when the adhesive 300 is cured, ultraviolet rays can irradiate the adhesive 300 through the light holes 221, so that the adhesive 300 is cured, and the defect that the ultraviolet rays cannot be cured due to the shielding of the ink area 220 of the protective panel 200 and the display panel 100 is overcome, so that the curing rate of the adhesive 300 is improved, and the bonding effect of the display panel 100 and the protective panel 200 is optimized.
In another embodiment, referring to fig. 3, the light hole 221 is configured as a groove, two sides of the light hole 221 do not exceed the ink area 220, and the width of the light hole 221 is not greater than the width of the adhesive 300, so that ultraviolet rays can also irradiate the adhesive 300 through the light hole 221 to cure the adhesive 300.
In addition, the boundary of the light hole 221 and the outer side of the adhesive 300 do not exceed the outer boundary of the ink area 220, so that the display panel 100 and the protection panel 200 provide a sufficient bonding space for the adhesion of the adhesive 300 and the flow in the hot pressing process, and the display effect of the display device is prevented from being affected by adhesive overflow.
Referring to fig. 1, the adhesive 300 may be configured in a frame shape, the adhesive 300 covers the ink area 220 and the bonding area 120, and the display panel 100 and the protection panel 200 may be fixed by frame bonding, referring to fig. 4, the adhesive 300 covers the first display area 210, the second display area 110, the ink area 220, and the bonding area 120, and the adhesive 300 may also be configured in a plane shape, and the display panel 100 and the protection panel 200 may be fixed by full bonding.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A display device attaching process is characterized by comprising the following steps:
s10, arranging a display panel and a protection panel, wherein the ink area of the protection panel is provided with a light hole;
s20, attaching an adhesive to the display panel or the protection panel, and attaching the display panel and the protection panel;
s30, carrying out hot pressing on the display panel and the bonding area of the protection panel in a vacuum environment;
and S40, curing the bonding area of the display panel and the protective panel.
2. The display device attaching process according to claim 1, wherein in the step S20, a frame-shaped attaching glue is provided, the attaching glue is attached to the protective panel or the display panel, and boundaries on both sides of the attaching glue do not exceed a boundary of an ink area of the protective panel.
3. The display device bonding process according to claim 1, wherein in the step S20, a planar bonding paste is provided, and the bonding paste is bonded to the protective panel or the display panel, and an outer boundary of the bonding paste does not exceed a boundary of an ink area of the protective panel.
4. The display device bonding process according to claim 1, wherein the light-transmitting holes are micro holes arranged in an array on the ink area.
5. The display device attaching process according to claim 1, wherein the light-transmitting hole is formed around the ink region.
6. The process of attaching a display device according to claim 1, wherein the step S40 includes pre-curing the attachment of the display panel and the protective panel and then fully curing the attachment.
7. The display device attaching process according to claim 6, wherein the pre-curing and the full-curing are performed by UV curing.
8. The display device bonding process according to claim 1, wherein a preliminary inspection is performed on a bonding place of the display panel and the protective panel before the step of S40, and a final inspection is performed after the step of S40.
9. The process of claim 1, wherein after the step of S30, a joint between the display panel and the protective panel is subjected to defoaming treatment.
10. A display device is characterized by comprising a display panel, a protective panel and a bonding adhesive, wherein the bonding adhesive is positioned between the display panel and the protective panel, and the display panel and the protective panel are bonded by adopting the display device bonding process according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010146334.5A CN111415584A (en) | 2020-03-05 | 2020-03-05 | Display device attaching process and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010146334.5A CN111415584A (en) | 2020-03-05 | 2020-03-05 | Display device attaching process and display device |
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Cited By (1)
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| CN112700721A (en) * | 2020-12-25 | 2021-04-23 | 深圳一鑫新材料有限公司 | Middle-small size flat display screen laminating process |
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