TWM592116U - Touchscreen having inkjet-printed decoration layer - Google Patents

Abstract

This creation relates to a touch screen, which includes: a liquid crystal display module, which includes a display surface; a touch panel, which is disposed above the display surface and receives touch input; and a protective glass, which is disposed above the touch panel And includes an inner surface facing the touch panel; and a composite decorative layer formed on the inner surface by performing an inkjet printing.

Description

Touch screen with composite decorative layer for inkjet printing

This creation is about a touch screen, especially a touch screen that contains a composite decorative layer made by inkjet printing.

A touchscreen refers to an inductive display that simultaneously receives touch signals input from a finger or a stylus while touching the screen while displaying the image on the screen. An external touchscreen is used as an example. The basic structure A finished touch panel is superimposed on a finished liquid crystal display module without touch function. The liquid crystal display module is used to display the screen and the touch panel is responsible for sensing touch input. When the finger or stylus meets the definition When a gesture touches an object, specific button or position on the screen, the controller immediately executes the corresponding command according to the predefined and programmed method; the touch screen has long been deeply used in daily life and industrial fields due to its advantages of easy operation and intuitiveness. use.

Therefore, the touch screen is also regarded as a combination product of the liquid crystal display module and the touch panel. Technically, the liquid crystal display module and the touch panel are each independent modules, which are separately manufactured and then assembled into the touch by optical bonding. Screen; the manufacturing process of the conventional LCD module is roughly divided into the front-end thin film array process (array), the middle-stage display cell process (cell) and the back-end module process. The front-end process is mainly a thin-film transistor (TFT) that controls liquid crystal deflection , Through film-forming, yellow light, lithography, etching and photoresist removal to a piece of conductive glass, the middle process is mainly produced in The TFT glass substrate is further provided with electrode arrangement, encapsulation of the TFT glass substrate, size cutting, liquid crystal injection, liquid crystal alignment, polarizing plate or color filter attachment, etc., forming a liquid crystal cell (cell) and a liquid crystal display array (array) ) To form a piece of liquid crystal display, the rear stage process is to install other peripheral components such as backlight module, control drive circuit for the liquid crystal display, and cover the liquid crystal display with a metal frame from all sides to cover and protect various internal components. Complete a complete liquid crystal display module, the liquid crystal display module can display the digital screen after receiving the image signal.

According to the working principle, conventional touch panels are mainly divided into two types: resistive and capacitive touch panels. Resistive touch detects the on and off states between two large-area conductive layers , And detect the linear resistance changes in the x and y directions in the on state to sense the touch input and calculate the corresponding coordinates. Capacitive touch mainly detects the change in capacitance between the two conductive glasses and the finger to sense the touch Touch the input and calculate the corresponding coordinates. The capacitive touch panel is divided into on-cell structure, in-cell structure and out-cell structure, etc., so the touch panel looks like a thin light transmission The film is roughly divided into two areas. In the central area, there are densely arranged touch sensing arrays composed of many light-transmitting touch sensing cells to sense the touch signals input by the user. Arranged with relatively messy and unsightly copper foil or silver paste traces, it is used to transmit signals to the touch sensing array and receive signals generated by the touch sensing array.

Figure 1 is a schematic diagram showing the structure of a conventional liquid crystal display module product and a conventional capacitive touch panel product; a conventional liquid crystal display module product 10, as shown in Figure 1, from the appearance, only one metal is located on the surrounding edges The frame 11 and a display surface 12 in the center, the frame 11 covers the liquid crystal display from the side, and only the display surface 12 of the liquid crystal display is exposed. The liquid crystal display composed of many liquid crystal cells is densely arranged in the display surface 12 Array structure, after properly driving and receiving image signals, digital screen can be displayed; conventional touch panel finished product 20, as shown in Figure 1 From the appearance, only the wiring area 21 located at the surrounding edges, also known as the border area or peripheral component interconnection area (PCI), as well as the central active area 22 and the active area of the touch panel 20 can be seen. In 22, there are densely arranged touch sensing arrays composed of many light-transmitting touch sensing cells to sense the touch signals input by the user, and the wiring area 21 is densely arranged for transmitting and receiving touch sensing array signals Multiple copper foil or silver paste wiring.

When the liquid crystal display module 10 is to be combined with the touch panel 20 and assembled as a conventional touch screen 30, the liquid crystal display module 10 is usually arranged below and the touch panel 20 is above, the display area of the liquid crystal display module 10 12 must correspond to the operating area 22 of the touch panel 20 in position, and the frame 11 of the liquid crystal display module 10 roughly corresponds to the wiring area 21 of the touch panel 20, but when the liquid crystal display module 10 displays When the digital image is not displayed on the surface 12, the messy and unattractive internal structure such as the liquid crystal cell structure distributed in the display surface 12 and the touch-sensing cell structure distributed in the actuation area 22 will be directly exposed, and The frame 11 of the liquid crystal display module 10 and the trace area 21 of the touch panel 20 around the edges of the touch screen 30 also expose many messy traces and uneven structures, so it is necessary to design an appropriate shield for the touch screen With a decorative structure to solve the above problems.

Therefore, after careful testing and research, and with a persevering spirit, the applicant finally conceived the case "a touch screen with a composite decorative layer of inkjet printing", which can overcome the above shortcomings. The following is a brief description of the creation.

This creation uses inkjet printing technology to directly print a composite decorative layer containing a decorative masking layer and a dark semi-translucent layer directly on the back of the cover glass. The decorative masking layer is used to mask the LCD display module in the touch screen Set in the concave and convex structure of the frame part and the wiring area of the touch panel The messy wiring, dark translucent layer is used to shield the liquid crystal cell structure distributed in the display area and the touch distributed in the sensing area of the touch panel when the digital display of the LCD module does not display digital images Induction of cell structure.

In this creation, the decorative masking layer and dark semi-translucent layer formed by inkjet printing technology can exhibit rich colors and style changes, and even show metallic luster and texture, but it is still a property of dielectric material, and also It can effectively reduce the thickness of the touch screen, reduce the weight of the touch screen, reduce the material cost, and simplify the production process of the touch screen. In particular, the inkjet printing technology itself requires relatively low construction costs for related equipment. The introduction period The process is relatively short, the production accuracy is high, and the cost of inkjet printing technology and the cost of ink consumables are both low, and a small amount of diverse production is possible. It is especially suitable for the production and processing of irregular or complex decorative patterns. More environmentally friendly and non-toxic.

According to this creation, a touch screen is proposed, which includes: a liquid crystal display module, which includes a display surface; a touch panel, which is disposed above the display surface and receives touch input; and a protective glass, which is disposed on the touch screen Above the panel, and includes an inner surface facing the touch panel; and a composite decorative layer formed on the inner surface by performing an inkjet printing.

Preferably, the composite decorative layer further includes a decorative shielding layer and a dark translucent layer, the decorative shielding layer and the dark translucent layer are formed on the same plane of the inner surface, and the decorative shielding layer is located At the peripheral edge of the inner surface and surrounding the dark translucent layer.

Preferably, the decorative masking layer is formed at the peripheral edge of the inner surface by performing the first inkjet printing, and the dark semi-translucent layer is formed at the inner surface by performing the second inkjet printing Central area.

Preferably, the decorative masking layer is printed using CMYK ink For printing, the dark translucent layer is printed using black (K) ink.

Preferably, the color density of the black ink is determined according to the reflected color reflected from the display surface of the liquid crystal display module.

Preferably, the color density is between 30% and 70%.

Preferably, the color density is selected from one of 33%, 45%, 50% and 67%.

Preferably, the decorative masking layer further includes: the printed quarter-color ink; and a plurality of metal particles dispersed in the printed quarter-color ink, so that the decorative mask layer can exhibit metallic luster and metallic texture.

Preferably, although the decorative masking layer has a metallic texture, it does not provide electrical conduction as a dielectric layer, and has an electrical impedance value ranging from 10 ¹⁰ Ω to 10 ²² Ω per meter.

Preferably, the touch screen further includes: the liquid crystal display module, which includes a frame and the display surface, and can display a picture within the range of the display surface, the frame surrounds the display surface, and the frame is higher than the A height drop is formed between the display surface and the display surface; and the touch panel includes a sensing area, and the sensing area corresponds in position to the display surface.

10‧‧‧Finished LCD module

11‧‧‧Border area

12‧‧‧Display

20‧‧‧Finished touch panel products

21‧‧‧ Route area

22‧‧‧Actual area

30‧‧‧Conventional touch screen

100‧‧‧This creative touch screen

110‧‧‧LCD display module

111‧‧‧Border

112‧‧‧Display

120‧‧‧Touch panel

121‧‧‧ Route area

122‧‧‧sensing area

130‧‧‧Decorative masking layer

140‧‧‧Dark translucent layer

150‧‧‧Protective glass

151‧‧‧Inside surface

160‧‧‧Composite decorative layer

FA‧‧‧Border area

VA‧‧‧Viewable area

Figure 1 is a schematic diagram showing the structure of a conventional liquid crystal display module product and a conventional capacitive touch panel product;

Figure 2 is a schematic diagram showing the multilayer structure of the first embodiment of the creative touch screen;

FIG. 3 is a schematic side sectional view of the multilayer structure of the first embodiment of the creative touch screen;

FIG. 4 is a schematic diagram showing the multilayer structure of the second embodiment of the creative touch screen;

FIG. 5 is a schematic side sectional view of the multilayer structure of the second embodiment of the creative touch screen;

FIG. 6 is a schematic diagram showing the multilayer structure of the third embodiment of the creative touch screen;

FIG. 7 is a schematic side sectional view of the multilayer structure of the third embodiment of the creative touch screen; and

Figure 8 is a schematic top view showing the multilayer structure of the creative touch screen.

This creation will be fully understood by the following examples, so that those who are familiar with this skill can complete it, but the implementation of this creation is not limited by the following implementation cases and its implementation type; It does not include restrictions on the size, size and scale. The actual implementation of this creation is not limited by the drawings of this creation.

The term "preferred" in this article is non-exclusive and should be understood as "preferred but not limited to". Any steps described or recorded in any specification or request can be performed in any order, not limited to the description in the request Order, the scope of this creation should be determined only by the appended request items and their equivalents, and should not be determined by the examples of implementation examples; when the term "comprising" and its variations appear in the description and the request items, An open language does not have a restrictive meaning and does not exclude other features or steps.

Figure 2 is a schematic diagram showing the multilayer structure of the first embodiment of the creative touch screen; Figure 3 is a schematic sectional view showing the multilayer structure of the first embodiment of the creative touch screen; Figure 8 is a schematic view showing the creative touch screen A schematic top view of the multi-layer structure; assuming that the liquid crystal display module 110 is used as the bottom layer, in the first embodiment, the creative touch screen 100 includes the liquid crystal display module 110, the touch panel 120, and the decorative mask in sequence. Layer 130, protective glass 150 and deep Multi-layer structure such as color semi-transmissive layer 140, in this embodiment, the dark semi-transmissive layer 140 will be the component closest to the user's eyes, and the layers are adhered and assembled together through optical bonding to form a touch控屏100。 Control screen 100.

The liquid crystal display module 110 includes a metal frame 111 located at the peripheral edges and a display surface 112 located at the center. The frame 111 covers a liquid crystal display with a display surface 112 from the surrounding sides, and the display surface 112 is densely arranged A liquid crystal display array composed of many liquid crystal cells displays the received digital picture. The display surface 112 faces the user's eye direction and faces the user. The frame 111 is slightly higher than the display There is a slight height drop between the frame 111 and the display surface 112. A touch panel 120 is attached to the liquid crystal display module 110; the touch panel 120 includes a routing area 121 and a In the central sensing area 122, a touch sensing array composed of a plurality of light-transmitting touch sensing cells is densely arranged in the sensing area 122 of the touch panel 120 to sense the touch signals input by the user, and the wiring area 121 Then densely arrange multiple traces for transmitting and receiving touch sensing array signals.

When the liquid crystal display module 110 and the touch panel 120 are assembled together, generally speaking, the frame 111 of the liquid crystal display module 110 corresponds to the wiring area 121 of the touch panel 120 in position, The display surface 112 is corresponding to the sensing area 122 of the touch panel 120 in position. When the display surface 112 of the liquid crystal display module displays a digital screen to the user within the range of the sensing area 122, the touch panel 120 can pass through the sensing area 122 Sensing the touch signal input by the user, when the user touches an object, a specific button or position on the digital screen with a finger or a stylus in accordance with the defined gesture, the touch panel 120 will detect the input signal Transfer to the controller.

Generally, the frame 111 of the LCD module 110 and the routing area of the touch panel 120 121, because they have irregular step shapes and messy wiring arrangements and other messy and unattractive structures, this creation proposes to stick a decorative masking layer 130 above the touch panel 120, the shape of the decorative masking layer 130 Corresponding to, but slightly larger than the frame 111 of the LCD module 110 and the trace area 121 of the touch panel 120, it is preferably a black opaque film in the shape of a mouth or frame, preferably made of PET film and decorated The color of the shielding layer 130 is preferably but not limited to black. After being manufactured, it can also exhibit a specific texture, which can not only shield the messy structure in the lower frame 111 and the routing area 121, but also have a decorative effect.

A piece of protective glass 150 is also stuck on the decorative masking layer 130. The protective glass 150 is preferably high-transmittance tempered glass, crystal glass or high-hardness glass, which can ensure that the digital screen displayed on the display surface 112 can be clearly displayed to the user For viewing, but at the same time, it has the physical characteristics of high hardness, which can protect the liquid crystal display module 110, the touch panel 120 and the decorative shielding layer 130 underneath, especially the liquid crystal display module 110 and the touch panel 120 with electronic components.

In order to allow the user to not directly see the liquid crystal cell structure distributed in the range of the display surface 112 and the touch-sensing cell structure distributed in the range of the sensing area 122 when the digital image is not displayed on the display surface 112, but when When the display surface 112 starts to display the digital image, the user must clearly see the digital image displayed on the display surface 112. This creation proposes to attach a dark translucent layer 140 above the protective glass 150. The shape of the light-transmitting layer 140 corresponds to the liquid crystal display module 110 and the touch panel 120, and is preferably a rectangular black translucent film, preferably made of PET film. After the dark semi-translucent layer 140 is assembled, When the display surface 112 does not display a digital screen, the appearance will be dark black. The user will only see a dark black display surface 112, and will not see the internal structure of the display surface 112 and the sensing area 122, and display The dark black on the surface 112 makes the entire touch screen 100 look more elegant, and the dark translucent layer 140 also has Decorating the effects of the touch screen 100 and the display surface 112, the dark translucent layer 140 can also serve as a protective layer for the protective glass 150.

Therefore, when the touch screen 100 of the first embodiment of the present invention is assembled and pasted, if viewed from the top view of the user, the part of the border area FA on the surrounding edges will appear decoratively shaded in appearance The color and texture of the layer 130 are shown in the central viewing area VA. When the display surface 112 is not displaying a digital image, the viewing area VA will show the color of the dark translucent layer 140 in appearance. Use The viewer will only see a dark black visible area VA, as revealed in Figure 8.

Figure 4 is a schematic diagram showing the multilayer structure of the second embodiment of the creative touch screen; Figure 5 is a schematic sectional view showing the multilayer structure of the second embodiment of the creative touch screen; Figure 8 is a schematic view showing the creative touch screen A schematic top view of the multilayer structure of the second embodiment; the second embodiment is based on the first embodiment, but the dark translucent layer 140 is attached to the inside of the protective glass 150, so that the protective glass 150 becomes the outermost structure to protect the dark color The semi-transmissive layer 140, in this embodiment, the protective glass 150 is the component closest to the user's eyes.

In the second embodiment, after the liquid crystal display module 110 is attached to the touch panel 120, a dark translucent layer 140 is adhered to the touch panel 120, and then the chevron-shaped decorative shielding layer 130 is adhered to the dark color The translucent layer 140, and finally the protective glass 150 is adhered above the decorative shielding layer 130. The positions of the decorative shielding layer 130 and the dark translucent layer 140 can also be interchanged, and the decorative shielding layer 130 is adhered to the touch panel 120. The dark translucent layer 140 is adhered to the decorative shielding layer 130. Generally, the decorative shielding layer 130 and the dark translucent layer 140 are between the touch panel 120 and the protective glass 150. In this embodiment The dark translucent layer 140 becomes disposed inside the touch screen 100 and can be protected by 150 of the protective glass, thus increasing the durability of the touch screen 100 as a whole Degree and extend the service life.

After the touch screen 100 of the second embodiment of the present invention is assembled and pasted, if viewed from the perspective of the user from the top, the part of the frame area FA on the surrounding edges can appear decoratively shaded in appearance The color and texture of the layer 130 are shown in the central viewing area VA. When the display surface 112 is not displaying a digital image, the viewing area VA will show the color of the dark translucent layer 140 in appearance. Use The viewer will only see a dark black visible area VA, as revealed in Figure 8.

Fig. 6 is a schematic diagram showing the multilayer structure of the third embodiment of the creative touch screen; Fig. 7 is a schematic sectional view showing the multilayer structure of the third embodiment of the creative touch screen; Fig. 8 is a schematic illustration of the creative touch screen A schematic top view of the multi-layer structure; in this third embodiment, the decorative masking layer 130 and the dark semi-translucent layer 140 are directly printed on the inner surface 151 of the protective glass 150 by inkjet printing technology to form a layer containing The composite decorative layer 160 of the decorative masking layer 130 and the dark translucent layer 140. The inkjet printing technology is preferably material spray forming technology, material spraying technology, nanoparticle spraying (NPJ) technology, drop-on-demand inkjet Print (drop-on-demand, DoD) technology, inkjet printing technology, thermal bubble inkjet printing technology, piezoelectric inkjet printing technology, relief printing technology, gravure printing technology or screen printing technology, The thickness of the decorative masking layer 130 or the dark translucent layer 140 printed by the inkjet printing technology is preferably maintained at an ultra-thin thickness of less than 1 μm (micrometer).

The decorative masking layer 130 is configured to be located at the peripheral edge of the inner surface and is in a chevron shape to surround the dark translucent layer 140, the dark translucent layer 140 at the center and the decoration at the edge The masking layer 130 is printed on the inner surface 151 by the same or different inkjet printing technology, but the two layers are printed on the same plane. The separations are different from each other and independent of each other. The decorative masking layer 130 is preferably printed using CMYK ink, and the dark translucent layer 140 preferably uses black (K) ink and undergoes color concentration Adjusted and printed, the color density of the K ink of the dark translucent layer 140 is determined by the reflection color reflected from the display surface 112 of the LCD module 110, and is preferably used for printing dark translucent The color density of the K ink in the layer 140 is between 30% and 70%, preferably 33%, 45%, 50% and 67% are the preset common values.

Since the liquid crystal display modules 110 supplied by each batch or different suppliers, or even the same batch of liquid crystal display modules 110, the display surface 112 of each liquid crystal display module 110 may not have the same color reflected on the surface. It may not be black or gray, and may be in different shades. Therefore, when inkjet printing technology is used to make the dark translucent layer 140, it can flexibly respond to the reflection color of each LCD module 110 The color density of the color translucent layer 140 is adjusted to match the color density. As long as the reflection color of the display surface 112 of each liquid crystal display module 110 is simply pre-verified, the dark color translucent layer 140 can be adjusted accordingly. The pigment composition and color density of the K ink, instead of the conventional one, must prepare many black translucent films with different color densities, and each finished touch screen 100 can have a more consistent appearance and a high standard. Display quality.

In the CMYK ink printed with the decorative masking layer 130, it may be preferable to further dope and contain a plurality of metal particles, so that the metal particles are dispersed substantially uniformly in the CMYK ink using the CMYK ink as a carrier to form a conductive discontinuous structure To make the final decorative masking layer 130 with metallic luster and metallic texture, but because the metal particles are actually dispersed in the CMYK ink in a discontinuous manner, although the decorative masking layer 130 can be made with metallic luster and Textured, but the decorative masking layer 130 still maintains a dielectric state, which can be regarded as a good dielectric under ordinary environmental conditions, and its electrical impedance value is preferably greater than 10 ¹⁰ Ω (ohm) per meter, or between each meter In the range of 10 ¹⁰ to 10 ²² Ω, the decorative masking layer 130 is still a dielectric layer, and will not cause electromagnetic interference to the touch screen 100, the liquid crystal display module 110, or the touch panel 120.

In this creation, a composite decorative layer 160 including a decorative masking layer 130 and a dark translucent layer 140 is printed directly on the protective glass 150 by using inkjet printing technology. The formed decorative masking layer 130 and the dark translucent layer are formed. The optical layer 140 can exhibit rich color and style changes, and even exhibit metallic luster and texture, but it is still a property of dielectric, and can effectively reduce the thickness of the touch screen 100, reduce the weight of the touch screen 100, and reduce Material cost, simplifying the manufacturing process of the touch screen 100, especially the inkjet printing technology itself requires relatively low equipment construction costs, relatively short introduction period, high manufacturing accuracy, and inkjet printing technology The cost and the cost of ink consumables are very low, and a small amount of diverse production can be carried out. It is particularly suitable for the production and processing of irregular or complex decorative patterns, and is relatively more environmentally friendly and non-toxic.

The above embodiments of this creation can be arbitrarily combined or replaced with each other, so as to derive more implementation forms, but all do not deviate from the scope of the protection of this creation, here are more examples of the creation:

Embodiment 1: A touch screen, including: a liquid crystal display module, which includes a display surface; a touch panel, which is disposed above the display surface and receives touch input; and a protective glass, which is disposed on the touch panel Above, and includes an inner surface facing the touch panel; and a composite decoration layer, which is formed on the inner surface by performing an inkjet printing.

Embodiment 2: The touch screen as described in Embodiment 1, wherein the composite decorative layer further includes a decorative shielding layer and a dark translucent layer, the decorative shielding layer and the dark translucent layer are formed on the inner side The surface is on the same plane, and the decorative shielding layer is located on the four sides of the inner surface At the edge and surrounding the dark translucent layer.

Embodiment 3: The touch screen as described in Embodiment 2, wherein the decorative masking layer is formed at the peripheral edge of the inner surface by performing the first inkjet printing, and the dark translucent layer is implemented by The second inkjet printing is formed in the central area of the inside surface.

Embodiment 4: The touch screen as described in Embodiment 2, wherein the decorative masking layer is printed by using printing four-color separation (CMYK) ink, and the dark semi-translucent layer is using black (K) ink Printed.

Embodiment 5: The touch screen as described in Embodiment 4, wherein the color density of the black ink is determined according to the reflected color reflected from the display surface of the liquid crystal display module.

Embodiment 6: The touch screen as described in Embodiment 5, wherein the color density is between 30% and 70%.

Embodiment 7: The touch screen as described in Embodiment 5, wherein the color density is selected from one of 33%, 45%, 50% and 67%.

Embodiment 8: The touch screen as described in Embodiment 2, wherein the decorative shielding layer further comprises: the printed quarter-color ink; and a plurality of metal particles dispersed in the printed quarter-color ink to make the decoration The masking layer can exhibit metallic luster and metallic texture.

Embodiment 9: The touch screen as described in Embodiment 8, wherein although the decorative masking layer has a metallic texture, it does not provide electrical conduction as a dielectric layer, and has between 10 ¹⁰ Ω~10 ²² per meter The impedance value between the Ω range.

Embodiment 10: The touch screen as described in Embodiment 1, further comprising: the liquid crystal display module, which includes a frame and the display surface, and can display a screen within the range of the display surface, the frame surrounding the display surface, The frame is higher than the display surface and a height drop is formed between the display surfaces Poor; and the touch panel, which includes a sensing area, the sensing area corresponds in position to the display surface.

The embodiments of this creation can be arbitrarily combined or replaced with each other, so as to derive more implementation forms, but all do not deviate from the scope of protection of this creation. The definition of the protection scope of this creation is based on the The record shall prevail.

100‧‧‧This creative touch screen

110‧‧‧LCD display module

111‧‧‧Border

112‧‧‧Display

120‧‧‧Touch panel

130‧‧‧Decorative masking layer

140‧‧‧Dark translucent layer

150‧‧‧Protective glass

151‧‧‧Inside surface

160‧‧‧Composite decorative layer

Claims (10)

A touch screen, including: A liquid crystal display module, which includes a display surface; A touch panel, which is arranged above the display surface and receives a touch input; A protective glass disposed above the touch panel and including an inner surface facing the touch panel; and A composite decorative layer is formed on the inner surface by performing an inkjet printing. The touch screen according to claim 1, wherein the composite decorative layer further includes a decorative shielding layer and a dark translucent layer, the decorative shielding layer and the dark translucent layer are formed on the inner side The surface is on the same plane, and the decorative shading layer is located at the peripheral edge of the inner surface and surrounds the dark translucent layer. The touch screen according to claim 2, wherein the decorative masking layer is formed at a peripheral edge of the inner surface by performing a first inkjet printing, and the dark translucent layer is implemented by implementing a The second inkjet printing is formed in the central area of the inside surface. The touch screen as described in claim 2, wherein the decorative masking layer is printed by using a printing color separation (CMYK) ink, and the dark semi-translucent layer is using a black (K) ink. Printed. The touch screen as recited in claim 4, wherein the color density of the black ink is determined by a reflected color reflected from the display surface of the liquid crystal display module. The touch screen as recited in claim 5, wherein the color density is between 30% and 70%. The touch screen according to claim 5, wherein the color density is selected from one of 33%, 45%, 50% and 67%. The touch screen according to claim 2, wherein the decorative shielding layer further includes: The printed quarter color ink; and The plural metal particles are dispersed in the printed four-color ink, so that the decorative masking layer can exhibit metallic luster and metallic texture. The touch screen as recited in claim 8, wherein the decorative shielding layer has a metallic texture but does not provide electrical conduction as a dielectric layer and has a range of 10 ¹⁰ Ω~10 ²² Ω per meter The electrical impedance value between the ranges. The touch screen as described in item 1 of the request also includes: The liquid crystal display module includes a frame and the display surface, and can display a picture within the range of the display surface, the frame surrounds the display surface, the frame is higher than the display surface and a height is formed between the display surfaces Drop; and The touch panel includes a sensing area, and the sensing area corresponds to the display surface in position.

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