CN108582976B

CN108582976B - Screen printing plate

Info

Publication number: CN108582976B
Application number: CN201810235243.1A
Authority: CN
Inventors: 邱翔飞; 郭美燕; 饶敏
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2018-03-21
Filing date: 2018-03-21
Publication date: 2021-04-13
Anticipated expiration: 2038-03-21
Also published as: CN108582976A; TW201940939A

Abstract

A screen includes a screen and a mask layer. The screen includes a predetermined ink-permeable area, a predetermined ink-semi-permeable area, and a predetermined ink-impermeable area. The mask layer is disposed on the screen. The mask layer includes an ink-impermeable layer, a partially ink-permeable layer, and a fully ink-permeable opening. The ink-impermeable layer covers all of the predetermined ink-impermeable areas of the screen. The partial ink-permeable layer covers a portion of the predetermined ink-semi-permeable area of the screen. The full ink-permeable openings expose all of the predetermined ink-permeable areas of the screen. The screen printing of the present invention can reduce the thickness of the ink in the overlapping area of the black ink layer and the non-black ink layer.

Description

Screen printing plate

Technical Field

The present invention relates to a screen printing plate, and more particularly, to a screen printing plate for manufacturing a non-black main frame of a display panel.

Background

Because the touch panel has the characteristic of human-computer interaction, the touch panel has been widely applied to electronic products such as smart phones (smart phones), satellite navigation systems (GPS navigator systems), tablet PCs (tablet PCs), Personal Digital Assistants (PDAs), and laptop PCs (laptop PCs). Since the display panel is adhered to the display surface of the display device, the user can directly view the display panel.

Generally, the colored decoration layer on the display panel is usually a black ink layer, which can provide sufficient shielding effect to shield the circuit or electronic components on the rear side. In order to meet the diversified demands of the appearance of consumers, display panels with non-black decorative layers (such as white, gold, rose, etc.) also have a place in the market. In a display panel having a non-black decorative layer, a black ink layer is usually formed on the periphery of the display region, and then three or even more layers of non-black ink layers are formed to cover a portion of the black ink layer and extend to the non-display region. However, when performing the subsequent assembly and bonding process, for example, when the protective cover plate with the non-black ink layer is bonded to the display module by using the optical adhesive, the optical adhesive is prone to generate a height difference in the overlapping area of the black ink layer and the non-black ink layer due to the excessively thick ink thickness, thereby generating bubbles and causing poor appearance quality.

Disclosure of Invention

In order to solve the above problems, the present invention provides a screen printing method for manufacturing a display panel with a non-black frame, which can reduce the thickness of ink between the overlapping regions of a black ink layer and a non-black ink layer.

The screen plate comprises a screen and a mask layer. The screen includes a predetermined ink-permeable area, a predetermined ink-semi-permeable area, and a predetermined ink-impermeable area. The mask layer is disposed on the screen. The mask layer includes an ink-impermeable layer, a partially ink-permeable layer, and a fully ink-permeable opening. The ink-impermeable layer covers all of the predetermined ink-impermeable areas of the screen. The partial ink-permeable layer covers a portion of the predetermined ink-semi-permeable area of the screen. The full ink-permeable openings expose all of the predetermined ink-permeable areas of the screen.

In some embodiments, the partial ink-permeable layer has a plurality of ink-shielding portions and a plurality of ink-permeable holes. The ink-permeable holes penetrate through the partial ink-permeable layer and are distributed among the ink-shielding portions.

In some embodiments, the sum of the areas of the plurality of ink shielding portions and the areas of the plurality of ink-permeable holes is 100%, and the areas of the ink-permeable holes are 20% to 80%.

In some embodiments, the ink-permeable opening has a rectangular ring profile, and the partially ink-permeable layer is disposed inside the rectangular ring profile.

In some embodiments, the partially ink-permeable layer comprises a first partially ink-permeable layer and a second partially ink-permeable layer. The first partial ink-permeable layer is provided with a plurality of first ink shielding parts and a plurality of first ink-permeable holes. The sum of the areas of the first ink shielding portions and the first ink through holes is 100%, and the area of the first ink through holes is 40% to 60%. The second partial ink-permeable layer is provided with a plurality of second ink shading parts and a plurality of second ink-permeable holes. The sum of the area of the second ink shielding portions and the area of the second ink through holes is 100%, and the area of the second ink through holes is 60% to 80%.

In some embodiments, each of the first ink-shielding portions and each of the first ink-permeable holes are staggered with respect to each other.

In some embodiments, the first partially ink-permeable layer is adjacent to the ink-impermeable layer and the second partially ink-permeable layer is adjacent to the fully ink-permeable opening.

In some embodiments, the first partially ink-permeable layer is disposed inside the second partially ink-permeable layer.

In some embodiments, the fully ink-permeable opening is adjacent to and surrounds the partially ink-permeable layer, and the partially ink-permeable layer is adjacent to and surrounds the ink-impermeable layer.

In some embodiments, the ink-impermeable layer comprises a first ink-impermeable layer and a second ink-impermeable layer. The first ink-impermeable layer surrounds the full ink-permeable opening, the full ink-permeable opening surrounds the partially ink-permeable layer, and the partially ink-permeable layer surrounds the second ink-impermeable layer.

Drawings

Fig. 1 is a top view of a screen according to an embodiment of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

FIG. 3A illustrates a partial enlarged view of FIG. 2 according to one embodiment of the invention.

Fig. 3B is a partially enlarged view of fig. 2 according to another embodiment of the present invention.

FIG. 4 is a schematic top view of a display panel with a non-black body frame according to an embodiment of the disclosure.

FIG. 5 is a cross-sectional view of the thin film transistor of FIG. 4 along line A-A' according to a comparative example of the present invention.

FIG. 6 is a cross-sectional view of the embodiment of the invention taken along line A-A' in FIG. 4.

Reference numerals:

10: screen printing plate

50: display panel

100: silk screen

100U: pattern printing unit

110: predetermined ink-permeable area

102: warp direction yarn

104: weft yarns

106: mesh hole

120: predetermined ink semi-permeable area

130: predetermined ink-impermeable areas

200: mask layer

210: ink impermeable layer

212: first ink-impermeable layer

214: second ink impermeable layer

220: local ink-permeable layer

220P: ink shielding part

220T: ink-permeable hole

222: a first partially ink-permeable layer

222P: a first ink shielding portion

222T: first ink penetration hole

224: second partial ink-permeable layer

224P: a second ink shielding portion

224T: second ink penetration hole

230: full ink penetration opening

300: screen frame

400: elastic edge

510: black ink layer

520: non-black ink layer

530: protective cover plate

540: adhesive agent

D: display area

P: peripheral region

W: width of

OL: overlapping area of non-black ink layer and black ink layer

H1: thickness of ink

H2: thickness of ink

A-A': thread

Detailed Description

In order to make the disclosure more complete and complete, the following description is provided for illustrative purposes of implementing aspects and embodiments of the invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The various embodiments disclosed below may be combined with or substituted for one another where appropriate, and additional embodiments may be added to one embodiment without further recitation or description.

In the following description, numerous specific details are set forth to provide a thorough understanding of the following embodiments. However, embodiments of the invention may be practiced without these specific details. In other instances, well-known structures and devices are shown schematically in order to simplify the drawing.

One aspect of the present invention provides a screen printing plate, which can be applied to manufacture a display panel having a non-black body frame. Fig. 1 illustrates a top view of a screen 10 according to one embodiment of the present invention. Referring to fig. 1, a screen 10 includes a screen 100 and a mask layer 200. In some embodiments, the screen 100 is made of a woven fabric of Teflon (Tetoron) fibers, Nylon (Nylon) fibers or metal materials, which are woven crosswise in the warp and weft directions. Specifically, the screen 100 has a plurality of pattern printing units 100U. In various embodiments, the screen 10 may further include a frame 300 and a flexible edge 400, and the screen 100 is fixed on the frame 300 by the flexible edge 400 after being stretched by a certain tension.

Fig. 2 is a partially enlarged view of fig. 1. As shown in fig. 2, the screen 100 includes a predetermined ink-permeable area 110, a predetermined ink-semi-permeable area 120, and a predetermined ink-impermeable area 130. It is understood that the pattern printing unit 100U is composed of a predetermined ink permeable area 110 and a predetermined ink semi-permeable area 120. The mask layer 200 is disposed on the screen 100. In some embodiments, the mask layer 200 blocks the screen openings by photo-curing portions of the non-ink-permeable areas by a chemical reaction of the emulsion to ultraviolet light. The mask layer 200 includes an ink-impermeable layer 210, a partially ink-permeable layer 220, and a fully ink-permeable opening 230. The ink-impermeable layer 210 covers all of the predetermined ink-impermeable areas 130 of the screen 100, the partially ink-permeable layer 220 covers a portion of the predetermined ink-semi-permeable areas 120 of the screen 100, and the fully ink-permeable openings 230 expose all of the predetermined ink-permeable areas 140 of the screen 100.

With continued reference to fig. 2, in some embodiments, the full ink-permeable opening 230 has a rectangular ring profile, and the partial ink-permeable layer 220 is disposed inside the rectangular ring profile. In various embodiments, the fully ink-permeable opening 230 is adjacent to and surrounds the partially ink-permeable layer 220, and the partially ink-permeable layer 220 is adjacent to and surrounds the ink-impermeable layer 210. In some embodiments, the ink-impermeable layer 210 includes a first ink-impermeable layer 212 and a second ink-impermeable layer 214. Specifically, the first ink-impermeable layer 212 surrounds the fully ink-permeable opening 230, the fully ink-permeable opening 230 surrounds the partially ink-permeable layer 220, and the partially ink-permeable layer 220 surrounds the second ink-impermeable layer 214.

FIG. 3A illustrates a partial enlarged view of FIG. 2 according to one embodiment of the invention. As shown in fig. 3A, the partial ink-permeable layer 220 has a plurality of ink-shielding portions 220P and a plurality of ink-permeable holes 220T. In detail, the ink penetration holes 220T penetrate the partial ink penetration layer 220 and are distributed among the plurality of ink shielding portions 220P. In some embodiments, if the sum of the areas of the plurality of ink shielding portions 220P and the areas of the plurality of ink through holes 220T is 100%, the areas of the ink through holes 220T are 20% to 80%. For example, the area of the ink-permeable holes 220T may be 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, or 75%. In one embodiment, each of the ink shielding portions 220P and each of the ink through holes 220T are staggered with each other such that the area of the ink through hole 220T is about 50%. In an embodiment where the area of the ink-permeable hole 220T is about 50%, the ink-permeable amount of the partial ink-permeable layer 220 can be reduced by half theoretically, so that the thickness of the printed ink can also be reduced by half.

With continued reference to fig. 3A, the screen 100 is formed by interlacing a plurality of warp yarns 102 and a plurality of weft yarns 104 with a distance therebetween, and any two adjacent warp yarns 102 and any two adjacent weft yarns 104 form a mesh 106. In more detail, the mesh number of the screen 100 is 350 mesh, and thus the size of each mesh hole 106 is 0.05 mm. In one embodiment, each of the ink-shielding portions 220P and the ink-permeable holes 220T may each correspond to a single mesh (0.05mm × 0.05 mm). In another embodiment, each of the ink-shielding portions 220P and the ink-permeable holes 220T may correspond to four meshes (0.10mm × 0.10mm), respectively. In other embodiments, each of the ink-blocking portions 220P and the ink-permeable holes 220T can determine the number of meshes that each of the ink-blocking portions 220P and the ink-permeable holes 220T can cover according to the mesh number of the screen 100, so that the printed ink system is continuous and uninterrupted.

Fig. 3B is a partially enlarged view of fig. 2 according to another embodiment of the present invention. As shown in fig. 3B, the partially ink-permeable layer 220 may further include a first partially ink-permeable layer 222 and a second partially ink-permeable layer 224. In detail, the first local ink-permeable layer 222 has a plurality of first ink-shielding portions 222P and a plurality of first ink-permeable holes 222T. If the sum of the areas of the plurality of first ink shielding portions 222P and the areas of the plurality of first ink through holes 222T is 100%, the areas of the first ink through holes 222T are 40% to 60%. For example, the area of the first ink-permeable holes 222T may be 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56% or 58%. In one embodiment, each of the first ink shielding portions 222P and each of the first ink through holes 222T are staggered with each other such that the area of the first ink through holes 222T is about 50%. In an embodiment where the area of the first ink-permeable hole 222T is about 50%, the ink-permeable amount of the first partial ink-permeable layer 222 can be reduced by half theoretically, so that the thickness of the printed ink can also be reduced.

Referring to fig. 3B, the second partial ink-permeable layer 224 has a plurality of second ink-shielding portions 224P and a plurality of second ink-permeable holes 224T. If the sum of the areas of the second ink shielding portions 224P and the second ink through holes 224T is 100%, the areas of the second ink through holes 224T are 60% to 80%. For example, the area of the second ink-permeable holes 224T may be 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, or 78%. In various embodiments, the first partially ink-permeable layer 222 is adjacent to the ink-permeable layer 210, and the second partially ink-permeable layer 224 is adjacent to the fully ink-permeable opening 230. In various embodiments, the first partially ink-permeable layer 222 is disposed inside the second partially ink-permeable layer 224. It is understood that the thickness of the ink after printing corresponding to the partially ink-permeable layer 220 increases from the inner side to the outer side.

FIG. 4 is a schematic top view of a display panel 50 with a non-black body frame according to an embodiment of the present invention. As shown in fig. 4, the display panel 50 includes a black ink layer 510 and a non-black ink layer 520, wherein the non-black ink layer 520 is disposed outside the black ink layer 510 and surrounds the black ink layer 510. In various embodiments, the Black ink layer 510 defines a display region D and a peripheral region P of the display panel 50, and the Black ink layer 510 is mainly used for blocking light leakage from the screen, so the Black ink layer 510 can be also referred to as a Black Matrix (BM) region. In many embodiments, the main frame of the display panel 50 is formed by the non-black ink layer 520, and the color of the non-black ink layer 520 may be white, gold, or other non-black colors. Since the non-black ink layer 520 is less effective than the black ink layer 510, 3 or more layers of the non-black ink layer 520 are formed during the printing process to enhance the shading and the saturation of the color tone.

FIG. 5 is a cross-sectional view of the thin film transistor of FIG. 4 along line A-A' according to a comparative example of the present invention. As shown in fig. 5, the black ink layer 510 is disposed on the protective cover 530 to define a display region D and a peripheral region P. In some embodiments, the protective cover 530 is a transparent insulating material, such as a transparent plastic substrate, a transparent plastic film, a transparent glass substrate, or a transparent glass film, and of course, the protective cover 530 may also be Polyethylene terephthalate (PET). In other words, the display panel 50 may be a rigid display panel or a flexible display panel according to the material of the protective cover 530. In various embodiments, the width W of the black ink layer 510 is 0.4mm to 1mm, and may be, for example, 0.5mm, 0.6mm, 0.7mm, 0.8mm, or 0.9 mm.

Referring to fig. 5, the non-black ink layers 520 cover a portion of the black ink layer 510 and extend to the peripheral region P. Since a printing tolerance still exists in the printing process, a portion of the non-black ink layer 520 overlaps the black ink layer 510 to form an overlapping region OL of the non-black ink layer 520 and the black ink layer 510. The multi-layer non-black ink layer 520 illustrated in fig. 5 is formed by a conventional screen printing process. Specifically, in the overlapping area OL of the non-black ink layer 520 and the black ink layer 510, the thickness H1 of the multi-layer non-black ink layer 520 is about 30um to 35um, thereby forming a height difference. When the display panel 50 and the display module (not shown) are assembled subsequently, the adhesive 540 is prone to generate bubbles due to the height difference, and thus the reliability of the product is affected. In one embodiment, the adhesive may be an Optical Clear Adhesive (OCA).

FIG. 6 is a cross-sectional view of the embodiment of the invention taken along line A-A' in FIG. 4. The difference between fig. 6 and fig. 5 is that the multi-layer non-black ink layer 520 shown in fig. 6 is printed multiple times by the screen 10 provided by the present invention. It is understood that the partial ink-permeable layer 220 of the halftone screen 10 corresponds to the overlapping area OL of the non-black ink layer 520 and the black ink layer 510 of the display panel 50, and the full ink-permeable opening 230 of the halftone screen 10 corresponds to the non-black ink layer 520 of the display panel 50 that is not overlapped with the black ink layer 510. As can be seen from the foregoing description of the halftone screen 10, the ink-permeable area of the partial ink-permeable layer 220 of the halftone screen 10 is 20% to 80%, so the ink thickness H2 after the printing process in the overlapping region OL of the non-black ink layer 520 and the black ink layer 510 is about 20um to 25um, and the ink thickness of the non-black ink layer 520 that is not overlapped with the black ink layer 510 is the same as the ink thickness of the comparative example in fig. 5. Therefore, the screen 10 of the present invention can not only reduce the ink thickness H2 in the overlapping area OL of the non-black ink layer 520 and the black ink layer 510 to avoid bubbles during the assembly process, but also maintain the color saturation of the non-black body frame of the display panel 50.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. A screen, comprising:

a silk screen, which comprises a preset ink-permeable area, a preset ink-semi-permeable area and a preset ink-impermeable area; and

a mask layer disposed on the screen, the mask layer comprising:

the ink-impermeable layer covers all the preset ink-impermeable areas of the silk screen;

a partial ink-permeable layer covering a portion of the predetermined ink-semi-permeable area of the screen, the partial ink-permeable layer comprising:

a first partial ink-permeable layer having a plurality of first ink-shielding portions and a plurality of first ink-permeable holes, wherein the sum of the area of the first ink-shielding portions and the area of the first ink-permeable holes is 100%, and the area of the first ink-permeable holes is 40% to 60%; and

a second partial ink-permeable layer having a plurality of second ink-shielding portions and a plurality of second ink-permeable holes, wherein the sum of the area of the second ink-shielding portions and the area of the second ink-permeable holes is 100%, and the area of the second ink-permeable holes is 60% to 80%; and

and a full ink-permeable opening exposing all the predetermined ink-permeable areas of the screen.

2. The screen of claim 1, wherein the first ink-permeable hole and the second ink-permeable hole penetrate through the partial ink-permeable layer and are respectively distributed between the first ink-shielding portion and the second ink-shielding portion.

3. The screen of claim 1, wherein the ink-permeable openings have a rectangular ring profile, and the partially ink-permeable layer is disposed inside the rectangular ring profile.

4. The screen of claim 1, wherein each of the first ink-shielding portions and each of the first ink-permeable holes are staggered with respect to each other.

5. The screen of claim 1, wherein the first partially ink-permeable layer is adjacent to the ink-impermeable layer and the second partially ink-permeable layer is adjacent to the fully ink-permeable opening.

6. The screen of claim 1, wherein the first partially ink-permeable layer is disposed inside the second partially ink-permeable layer.

7. The screen of claim 1, wherein the ink-permeable openings are adjacent to and surround the partially ink-permeable layer, and the partially ink-permeable layer is adjacent to and surrounds the ink-impermeable layer.

8. The screen of claim 1, wherein the ink-impermeable layer comprises a first ink-impermeable layer surrounding the full ink-permeable opening, the full ink-permeable opening surrounding the partially ink-permeable layer, and a second ink-impermeable layer surrounding the second ink-impermeable layer.