CN203422724U

CN203422724U - Touch screen

Info

Publication number: CN203422724U
Application number: CN201320528653.8U
Authority: CN
Inventors: 何德恩
Original assignee: BERN OPTISK (SHENZHEN) CO Ltd
Current assignee: Biel Crystal Manufactory Huizhou Ltd
Priority date: 2013-08-28
Filing date: 2013-08-28
Publication date: 2014-02-05
Anticipated expiration: 2023-08-28

Abstract

The utility model discloses a touch screen. A stacked structure of the touch screen comprises a transparent substrate, a light-shading plating layer stacked on the transparent substrate and glass or a photographic film stacked on the light-shading plating layer and having a touch control function. The light-shading plating layer of the touch screen is formed by adopting PVD, and edge bubbles, step gaps and the like of a window can be effectively decreased.

Description

Touch screen

Technical field

The utility model belongs to touch screen field, especially relates to a kind of use PVD(physical vapour deposition (PVD)) touch screen of shading coating.

Background technology

At present, market left-hand seat machine side glass sheet light shield layer is all to adopt the technology of serigraphy to realize, and allocates a certain proportion of rigidizer in ink, pass through the film, ink is evenly imprinted on to glass surface, then baking makes ink sclerosis, realize the shaded effect of glass non-display area.But along with being widely current of Mobile phone touch control screen, the technology of serigraphy more demonstrate he limitation.Adopt the glass coating thickness of serigraphy can only be controlled at micron order, and the also very difficult control of the homogeneity of coating thickness, individual layer ink thickness is conventionally at 7 μ m, and thickness deviation ± 1 μ m, need to print two-layer conventionally; This makes when rear operation adhesive film class auxiliary material (ITO film, blow-out disc, AR film, the anti-light film etc. of dazzling), due to the difference of height, easily to cause Poor cohesion, as bubble, step space (shown in Fig. 1).

Utility model content

The purpose of this utility model is to provide a kind of touch screen of the PVD of use shading coating, solves the defect that prior art exists.

For achieving the above object, the technical solution adopted in the utility model is:

, the stepped construction of described touch screen is transparent base, is laminated in the shading coating on transparent base, is laminated in the glass that has touch controllable function or film on shading coating.

Further improve and be: described transparent base is clear glass or sapphire transparent glass.

Further improve and be: described shading coating is metal material and the oxide of Semiconducting Silicon Materials or the shading coating that nitride forms by PVD that electrical conductivity is lower, described metal material is a kind of in Sn, Zn, Cr.

Further improve and be: described shading thickness of coating is 300nm-800nm.

Coating adopts oxide or the alternately formation of nitride of metal material that electrical conductivity is lower and Semiconducting Silicon Materials, and low electrical conductivity metal is a kind of in Sn, Zn, Cr.

Coating color can be black, can be also other any color, and characteristic is opaque non-conductive.

The shading coating of touch screen described in the utility model adopts PVD to form shading coating, can effectively improve the problems such as form edge bubble, step gap.

Accompanying drawing explanation

Figure 1 shows that the touch-control screen structure sectional view of traditional handicraft;

Figure 2 shows that touch-control screen structure sectional view described in the utility model.

Accompanying drawing mark

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further details.

Touch screen as shown in Figure 2, stepped construction is the transparent substrate layer 1 of clear glass or sapphire transparent glassy layer, folds the shading coating 5 that the employing PVD in transparent substrate layer 1 forms, and is laminated in the glass that has touch controllable function or film 3 on shading coating 5.

By sputtering type PVD vacuum coating equipment, with the little T target of a kind of electrical conductivity and a kind of S target, produce for plated film by a certain percentage, obtain opaque nonconducting PVD light shield layer.

Sputtering type PVD vacuum coating equipment principle: under vacuum state, at the target back side, apply negative pole high-voltage power supply, the argon gas (Ar) that makes to be charged to target material surface produces glow discharge, thereby ionization argon gas, at target material surface, form plasma, utilize the attractive force of positive charged particles (argon gas atmo core) in negative pole (target) plasma, make positively charged atomic nucleus high-speed impact target material surface, the molecule of target material surface, atoms etc. obtain overflowing after sufficient kinetic energy, fly on the substrate of High Rotation Speed before target and form film, when substrate goes to machine rear side, film on substrate is under the effect in the radical source of radio frequency (Radio Freqency) (Radical source), react with gas (main Oxygen and Nitrogen), the simple substance film that obtains wanting by the gas that regulates the radical source of radio frequency to be filled with, oxide film or nitride film.

The elemental metals T that selects visible region high extinction coefficient on rete forms, its electrical conductivity is less, itself and oxide or the nitride material stack of S target, optimization thickness, obtains the non-coated surface of black or other color.

Employing PVD coating process can be by THICKNESS CONTROL below 0.7 μ m, thickness deviation is ± 0.02 μ m, compare with existing screen printing technique, gained coating film thickness obviously reduces, the thickness of PVD light shield layer only has a thirtieth of traditional silk-screen layer, and effectively reduce difference in thickness, the Poor cohesion problems such as the bubble having caused due to difference in height while having avoided rear operation adhesive film class auxiliary material, space 4.

According to data, show, PVD light shield layer is applied to after touch screen, laminating engineering bubble fraction defective has declined 15.3%.

Take at black coating look light shield layer on glass is example, and visually, the black effect of this shielding layer has identical visual effect with serigraphy dirty oil, and in visible-range, the transmitance of light is zero.

With CIE1976 Lab uniform color space, describe

Employing serigraphy black light shield layer, its color measuring is: L, 26 ± 1 a, 0 ± 1 b, 0 ± 1

The black light shield layer that adopts PVD technology to be coated with, its color is similarly: L, 26 ± 1 a, 0 ± 1 b, 0 ± 1

Shielding layer composition and thickness are as following table, and its gross thickness is 473.89nm:

The actual measurement Lab value of PVD coating: 26.94 a:-0.03 b:0.59

The reflectivity of serigraphy

The Lab value L:25.89 a:0.06 b:-0.55 of the actual measurement of serigraphy

Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.

Claims

1. a touch screen, is characterized in that: the stepped construction of described touch screen is transparent base, is laminated in the shading coating on transparent base, is laminated in the glass that has touch controllable function or film on shading coating.

2. touch screen as claimed in claim 1, is characterized in that: described transparent base is clear glass or sapphire transparent glass.

3. touch screen as claimed in claim 2, is characterized in that: described shading thickness of coating is 300nm-800nm.