TWM447828U - Device having multiple printing layers - Google Patents

Abstract

The present disclosure discloses a device having multiple printing layers, wherein said device comprises: a protective substrate having an open surface exposed outward and a laminating surface required to be laminated with a plate; and at least a printing layer that is seriatim stack-printed on a part of the laminating surface of the protective substrate in an ascending order of size, wherein the closer the printing layer is to the laminating surface, the smaller area the printing layer has. The smaller area the printing layer has so as to reduce height difference between printing layers and make for the following lamination.

Description

Device with multiple layers of printed layers

The present invention relates to a device having a printed layer, and more particularly to a device having a plurality of printed layers.

With the boom of smart phones and tablets in recent years, touch panels are in short supply in the application of such handheld electronic devices, prompting the industry to continuously improve their related process technologies in order to reduce production costs and provide more High production capacity.

In general, the touch panel needs to be covered with a layer of reinforced glass (cover glass/lens) to protect the underlying touch sensor from scratches, fingerprints, and stains. In addition, since the protective glass is particularly used for touch and display on handheld electronic devices, it must also have the characteristics of lightness, pressure resistance, drop resistance, and high transparency.

Traditionally, components in a handheld electronic device (including display panels, touch panels, and protective glass, etc.) are assembled through a bezel. However, due to the strong demand for lightweight and short-handed consumer electronic devices (especially smart phones), the industry has adopted a large number of frameless exterior designs, in order to further reduce the electronics by eliminating the frame members. The weight and size of the unit as a whole.

Under the above-mentioned frameless design, the bonding of the protective glass and the lower touch panel is a key technology, and whether the fit between the two will affect the yield of the final product. Especially in the frameless exterior design, as shown in FIG. 1 , which is a top view of the appearance of the smart phone for a moment, the designer usually needs the electronic device for the design requirements of the overall appearance and color configuration. The appearance of the frame creates a feeling of a border. In this example, a predetermined layer pattern 110 is printed on the protective glass 100 by using the printing ink, and then the entire protective glass 100 is printed with a border pattern. That side is fully integrated with the touch panel (not shown). Thus, the transparent area on the protective glass 100 that is not printed with the border pattern is used as the touch area. 101, and the border graphic 110 enables the finished product to achieve the design sense that the designer wants to present to the user.

Referring now to Figure 2, there is shown a partial cross-sectional view of a liquid crystal display device of the prior art, showing a state in which a panel 200 printed with a printed layer 210 is attached to a sheet 220 (such as a polarizer). As shown in the figure, the printing layer 210 (such as printing ink) is pre-printed on the panel 201 as a frame pattern, and the enamel is adhered to the plate 220 through an adhesive layer 230. In this example, since the printing layer 210 is interposed between the panel 200 and the plate 220, the bonding process may be difficult to grasp the yield of the bonding process due to the difference in height between the printing layers 210. In order to design changes or to make the color OD value (optical density) of the border pattern reach the designer's requirements, it is often necessary to layer-print a plurality of printed layers on the substrate, as shown in the panel 200 in FIG. That is, four different printed layers 210 are superimposed on the order of the areas from large to small. In practice, the more printed layers used in the border pattern, the more the difference between the layers will be more obvious, which is not conducive to the subsequent precise bonding process. Moreover, during the bonding of the printed layer printed on the layered printing method and the panel, it is easy to produce obvious bumps at the boundary of each printed layer due to the problem of ink accumulation, and further enlarge the average height difference of the printed layer structure.幷 Damage to the predetermined border graphic.

Therefore, in order to improve the bonding yield of the protective glass at the rear of the touch panel, there is an urgent need in the industry to develop new printing technologies and bonding processes to solve the defects in the above-mentioned known technologies.

In view of the above-mentioned deficiencies in the prior art, one of the objects of the present invention is to provide a device having a plurality of printed layers which are sequentially laminated on a protective substrate in a small and large area. On the bonding surface, a protective substrate having a small difference in height of the printed layer can be produced to improve the yield of the subsequent bonding process and improve the color OD value of the border pattern.

According to an embodiment of the present invention, a device having a plurality of printed layers is disclosed, comprising a protective substrate having an open exposed surface and an additional a sheet-fitting abutting surface; and at least one printed layer sequentially printed on the bonding surface of the portion of the protective substrate, wherein the printing layer closer to the bonding surface has The smaller the printed area.

Through the small and large printing design of the printing layer, the interlayer height difference between the printing layers can be effectively reduced, which is favorable for subsequent bonding with the board.

The objectives and other objects of the present invention will become more apparent from the detailed description of the preferred embodiments illustrated herein.

Please refer to FIG. 3, which is a schematic cross-sectional view of a device having a multi-layer printing layer according to an embodiment of the present invention, illustrating a state in which the protective substrate 300 is attached to a sheet 320 (such as an upper polarizer in a display panel). In this embodiment, the protective substrate 300 is provided as a protective layer for protecting the lower layer plate 320 (such as a touch substrate having a touch sensing layer or an upper polarizing plate for a display panel), and the material thereof may be transparent. Glass (such as a protective glass) or plastic. As shown in the figure, the protective substrate 300 is divided into a frame area 300a and a non-frame area 300b surrounded by the frame area. The frame area 300a is a graphic area on which an opaque ink pattern can be printed. Define the border of the device or give a change in the color design of the device. The non-frame area 300b is the touch area of the entire substrate, and no graphic is printed thereon to allow image information to be presented to the user. The protective substrate 300 will have an outwardly exposed open face 302 and a conforming face 303 to be bonded to the sheet 320. The open surface 302 is exposed to the outside of the device after the protective substrate 300 is attached and assembled, and the bonding surface 303 is laminated with a plurality of printed layers 310, and the printed layers 310 of the plurality of layers may be ink layers. It is printed on the frame region 300a of the bonding surface 303 of the protective substrate 300 in a layered manner in a small to large manner in a small to large manner. The non-frame area 300b of the open surface 302 is a touch area, which can be used by a user to perform a scribing or clicking action on a finger or a stylus to achieve a manipulation effect. During the bonding process, the protective substrate 300 will be fully bonded to the underlying sheet 320 through an adhesive layer 330. In one embodiment, the protective substrate 300 further includes a touch sensing layer formed on the non-frame region 300b (ie, the touch region) of the bonding surface 303 of the protective substrate 300. Form one in The touch panel integrated with the touch function on the protective substrate is bonded to the lower layer of the sheet 320 (such as the upper polarizer in the display panel) through an adhesive layer 330 during the bonding process.

Referring now to Figure 4, a partial plan view of a printed layer of a plurality of layers in accordance with an embodiment of the present invention after the protective substrate has actually been bonded to the sheet material is depicted. As can be seen from the figure, the laminated printed layer 410 will assume a state of the bezel from the perspective of the open face of the substrate, wherein the printed layer 410 has a plurality of layers (such as the region 410b, which includes two layers). A region with less overlap (such as region 410a, only one laminate) exhibits a darker, denser color, representing a higher OD value (optical density), and an edge region with more layers of printed layers. The darker the color, the intermediate transparent area without any printed layer is used as the touch area 401. It should be noted that in other new states, the printed layer may also exhibit a color distribution state that is different from the depth and the outer layer of the present embodiment, for example, it may be in the form of an outer shallow inner depth or an irregular color distribution layer. Depending on the designer's design. By controlling the lamination setting and distribution of the printed layer as described above, the designer can design a frame state rich in color and appearance on the substrate surface.

The present invention is characterized in that the plurality of printed layers provided on the protective substrate are sequentially layer-printed on the bonding surface of the substrate in a small and large order, which is large in size according to the prior art. The traditional practice of small sequential layer printing is the opposite. For the purposes of the present invention, referring to Figure 3, the printing of a relatively small printed layer (e.g., 310a) prior to printing allows the subsequent printed layer (e.g., 310b) to have the previous printed layer as a support structure. The basis is printed so that the subsequent printed, larger printed layer can be distributed along the surface of the front printed layer, which will make the overall printed layer slope gentle, without the prior art practice The distribution of the height difference structure shown in Fig. 2 or the occurrence of bumps easily occurs.

Referring now to FIG. 5 and FIG. 6 , respectively, the printing layers are printed according to the prior art in a layered printing method in which the area is large and small, and in the prior art, the printing is performed in a small and large area. Schematic diagram of the distribution of height difference between layers. It can be seen from the comparison between FIG. 5 and FIG. 6 that the printed layer structure obtained by the prior art layer printing method has a large interlayer height difference h1 (for example, 2.98 μm), which is obtained by the novel method. The resulting printed layer structure will, on average, have a relatively small height difference h2 (e.g., 0.79 μm). Furthermore, the layered structure printed in the prior art is layered The waviness between the layers is steeper, and the layered structure printed by the novel method has a smoother waviness between layers. Comparison of the two figures demonstrates that the protective substrate with the printed layer pattern obtained by the novel printing method has a better yield performance in the subsequent bonding process.

Reference is now made to Fig. 7, which is a flow 700 of a method of printing a multilayer printed layer in accordance with an embodiment of the present invention. First, in step block 701, a protective substrate is provided as a protective member for the underlying sheet material, the protective substrate having an open side to be exposed outward and a bonding surface to be bonded to the other sheet. The material can be transparent glass or plastic, and has the characteristics of lightness, pressure resistance, drop resistance and high transparency. Next, in step block 702, at least one printed layer having a small to large area is sequentially layered on the bonding surface of the portion of the protective substrate. The printed layer acts as a border pattern to distinguish it from the transparent touch area of the protective substrate.

In a further embodiment of the present invention, as indicated by step block 703, the protective substrate with the multilayer printed layer is further conformed to the other sheet after the printed layer is printed. This laminating step may be carried out by applying a layer of adhesive to the sheet and pressing it together with the protective substrate. After lamination, the laminated multilayer printed layer exhibits a bezel state from the perspective of the open face of the substrate.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

100‧‧‧protective glass

101‧‧‧ touch area

110‧‧‧Border graphics

200‧‧‧ panel

210‧‧‧Printing layer

220‧‧‧ plates

230‧‧‧Adhesive layer

300‧‧‧Protective substrate

300a‧‧‧Border area

300b‧‧‧Non-frame area

302‧‧‧Open face

303‧‧‧Fitting surface

310‧‧‧Printing layer

310a‧‧‧Printing layer

310b‧‧‧Printing layer

320‧‧‧ plates

330‧‧‧Adhesive layer

401‧‧‧ touch area

410‧‧‧Printing layer

410a‧‧‧Area

410b‧‧‧Area

700‧‧‧ Process

701‧‧‧Step block

702‧‧‧Step block

703‧‧‧Step block

Figure 1 is a top plan view of the appearance of a known smart phone.

2 is a schematic cross-sectional view showing a portion of a liquid crystal display device in the conventional art.

3 is a schematic cross-sectional view of a device having multiple layers of printed layers in accordance with an embodiment of the present invention.

4 depicts a top plan view of a portion of a printed layer of a layer in accordance with an embodiment of the present invention after the protective substrate has actually been bonded to the sheet.

FIG. 5 and FIG. 6 are schematic diagrams showing the distribution of the height difference of the printed layer printed by the large and small layer printing method according to the prior art and the layered printing method of the present invention with a small area and a large area.

7 is a flow chart of a printing method of a multilayer printed layer according to an embodiment of the present invention.

300‧‧‧Protective substrate

300a‧‧‧Border area

300b‧‧‧Non-frame area

302‧‧‧Open face

303‧‧‧Fitting surface

310‧‧‧Printing layer

310a‧‧‧Printing layer

310b‧‧‧Printing layer

320‧‧‧ plates

330‧‧‧Adhesive layer

Claims (6)

An apparatus having a plurality of printed layers, comprising: a protective substrate having an outwardly exposed open surface and a bonding surface bonded to the other sheet; and at least one printed layer sequentially printed on the layer The bonding surface of the portion protecting the substrate, wherein the printing layer closer to the bonding surface has a smaller printing area. The device of claim 1, wherein the protective substrate is divided into a frame area and a non-frame area surrounded by the frame area, and the printing layer is printed on the frame. The area is used as a border graphic. The device having a multi-layer printed layer as described in claim 2, further comprising a touch sensing layer formed on the non-frame area of the bonding surface of the protective substrate. The device of claim 1, wherein the protective substrate is a protective glass of a touch panel. The device of claim 1, wherein the plate is a touch substrate having a touch sensing layer or an upper polarizer of a display panel. A device having a multilayer printed layer as described in claim 1, wherein the printed layer is an ink layer.