阅读说明：本技术 加密防伪元件 (Encrypted anti-counterfeiting element ) 是由 辛科 宁焕成 罗鹏 刘萃 郑家军 王燕 马健 杨秀菊 杨帆 于 2019-10-12 设计创作，主要内容包括：本发明提出了一种加密防伪元件,包括：基材,基材上设有至少一种券面特征；至少一种加工特征,设于基材的至少一个券面上,且至少一个加工特征可根据第一加密规则由至少一个券面特征得到。通过本发明提出的方案,可有效提高防伪能力,增加加密防伪元件的伪造难度,简化鉴别操作,改善用户的体验。(The invention provides an encryption anti-counterfeiting element, which comprises: the stock, there is at least one kind of note face characteristic on the stock; at least one machined feature disposed on at least one face of the substrate, the at least one machined feature being derived from the at least one face feature according to the first encryption rule. The scheme provided by the invention can effectively improve the anti-counterfeiting capacity, increase the counterfeiting difficulty of the encrypted anti-counterfeiting element, simplify the identification operation and improve the user experience.)

1. A cryptographic security element, comprising:

the stock comprises a base material, wherein at least one stock face characteristic is arranged on the base material;

at least one processing feature is located on at least one face of the substrate, and at least one of the processing features is derivable from at least one of the face features according to a first encryption rule.

2. The cryptographic security element of claim 1, wherein said face characteristics comprise one or a combination of:

the position relation between the fiber characteristics under the preset position of the base material and the information of at least two seal order graphics in the face of the base material.

3. The cryptographic security element of claim 2, wherein said face characteristic is a geometric characteristic of at least one fiber in a predetermined location in said substrate,

wherein the fibers specifically comprise: material fibers of the base material and release fibers of the base material.

4. A cryptographic security element according to claim 3, wherein the number of fibres is one and the geometric characteristic of the at least one fibre is a projected length of the fibre in the length direction of the substrate and a projected length of the fibre in the width direction of the substrate; and/or

The geometric features are the length and width of a smallest rectangle covering one of the fibers and the smallest included angle between the smallest rectangle and the length direction of the substrate.

5. A cryptographic security element according to claim 3,

the number of the fibers is a plurality of,

wherein the geometric characteristic of the at least one fiber is the projected length of the midpoint connecting line of any two fibers in the length direction of the base material and the projected length of the midpoint connecting line of any two fibers in the width direction of the base material; and/or

The geometric characteristic of the at least one fiber is that a minimum included angle is formed between a midpoint connecting line of any two fibers and the length direction of the base material; and/or

The geometric feature of the at least one fiber is a textured shape formed by a plurality of the fibers.

6. The cryptographic security element of claim 2, wherein the positional relationship between at least two signature graphic messages in the face of the substrate specifically comprises:

the minimum distance between any two pieces of the seal order image information in the length direction of the base material; and/or

The minimum distance between any two pieces of the seal order image information in the width direction of the base material; and/or

An included angle is formed between a connecting line between any two pieces of the printing order image and text information and the length direction of the base material; and/or

An included angle is formed between a connecting line between any two pieces of the printing order image and text information and the width direction of the base material.

7. The cryptographic security element of claim 1, wherein said first encryption rule is a correspondence between said face characteristics and character information, at least one of said face characteristics generating character information in accordance with said first encryption rule.

8. The encrypted security element of claim 7, wherein said at least one face feature generates character information in accordance with said first encryption rule, comprising:

at least one face feature generates a plurality of binary bytes according to the first encryption rule;

generating decimal digits according to the number of the same kind of digits in each binary byte, and taking the decimal digits as the character information; or

And generating decimal digits according to the digits of the preset digits of the decimal digits corresponding to each binary byte, and taking the decimal digits as the character information.

9. A cryptographic security element as in claim 7, wherein the processing features in particular comprise:

at least one printed character which is arranged on the base material and corresponds to at least part of the character information; and/or

At least one microporous character, each microporous character including a plurality of micropores recessed inward from at least one side of the substrate, and at least one microporous character corresponding to at least a portion of the character information.

10. A cryptographic security element in accordance with claim 9, wherein each of the microwell groups forms a microwell character that is visible to a different degree in reflected and transmitted light,

when the character type of the printed character is a number or a letter, the micropore character can be obtained from the printed character according to a second encryption rule; when the character type of the printed character is a pattern, the printed character can be obtained from the micro-porous character according to a second encryption rule.

11. A cryptographic security element according to claim 10,

the character types of the micropore character specifically include: numbers, letters, patterns;

the character types of the printed characters specifically include: numbers, letters, patterns.

Technical Field

The invention relates to the technical field of anti-counterfeiting, in particular to an encryption anti-counterfeiting element.

Background

In daily life, people often use money, currency notes and the like with use values, but some lawbreakers often forge the money and the currency notes to obtain improper benefits, so that losses are brought to other people. Therefore, people need to identify the authenticity of currency and currency notes during transaction, different anti-counterfeiting modes can be adopted during the printing of currency rolls, for example, in the prior art, a patent with publication number CN105803856A proposes an anti-counterfeiting paper, a plurality of micropores are positioned and punched in a set area of the anti-counterfeiting paper by a laser, the micropores form numbers, diamonds or other patterns, the micropore patterns have single-color or multi-color pearl effect under reflected light and have micropore patterns or character effects with different visible degrees under transmitted light so as to realize the anti-counterfeiting of the anti-counterfeiting paper, a patent with publication number CN201824668U proposes an anti-counterfeiting printed product, partial characters in a character string on a carrier of the anti-counterfeiting printed product have a corresponding quantity relationship with the structural characteristics of the micropores on the carrier of the anti-counterfeiting printed product, and an identifier corresponds the characters in the character string with the quantity of the structural characteristics of the micropores in the printed product, the anti-counterfeiting effects of the technologies such as laser micropore printing, pearl printing and the like in the production of anti-counterfeiting paper in the prior art are single, the corresponding relation between the number of the characters and the structural characteristics with micropores is too simple and visual, the counterfeiting difficulty is low, the counterfeiting cost is low, and the loss to users is easy to cause.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

In view of the above, the present invention provides an encryption security element.

In order to achieve the above object, the technical solution of the present invention provides an encryption anti-counterfeit element, including: the stock, there is at least one kind of note face characteristic on the stock; at least one machined feature disposed on at least one face of the substrate, the at least one machined feature being derived from the at least one face feature according to the first encryption rule.

According to the encryption anti-counterfeiting element provided by the invention, each encryption anti-counterfeiting element has different face characteristics by arranging at least one face characteristic on the base material, so that the encryption anti-counterfeiting elements have uniqueness, and the authenticity of the encryption anti-counterfeiting element is identified by the independent face characteristics of each encryption anti-counterfeiting element, wherein the base material is also provided with at least one processing characteristic, on the basis, at least one face characteristic obtains at least one processing characteristic according to a first encryption rule, so that at least one processing characteristic of the encryption anti-counterfeiting element and at least one face characteristic have a uniquely determined corresponding relation according to the first encryption rule, so that at least one processing characteristic has uniqueness, and can be distinguished according to at least one processing characteristic when the authenticity is identified, thereby improving the counterfeiting cost, and particularly, the face characteristic is detected by utilizing an identification device or instrument, if the obtained information is consistent with the processing characteristics, the encrypted anti-counterfeiting element can be judged to be true, if the obtained information is inconsistent with the processing characteristics, the encrypted anti-counterfeiting element can be judged to be false, it needs to be emphasized that the anti-counterfeiting form of the processing characteristics obtained through the first encryption rule according to the face characteristics improves the counterfeiting difficulty and the counterfeiting cost, specifically, when the encrypted anti-counterfeiting element is identified, the face characteristics need to be identified by utilizing identification equipment, the information encrypted through the first encryption rule in the face characteristics is obtained, the obtained encrypted information is compared with the processing characteristics, and the authenticity is identified.

Wherein, the face characteristic can be selected at random, and first encryption rule can select different encryption forms according to the face characteristic of difference, has richened encryption anti-fake element's anti-fake form and anti-fake effect to further improvement encryption anti-fake element's the degree of difficulty.

The number of the face features can be one type or multiple types, the number of the processing features can be one type or multiple types, multiple types of processing features can be obtained according to a first encryption rule according to one type of face features, and each type of face features can also be obtained according to the first encryption rule.

When the processing characteristics are various, different processing characteristics can be arranged on each face, and a plurality of different processing characteristics can be arranged on any face of the base material.

The character of the face of the card specifically includes but is not limited to the fiber texture of the base material, the geometric characteristics of the distribution of the colored fibers or fluorescent fibers in the base material, and the relative position relationship of pictures and texts in different printing procedures; processing characteristics include, but are not limited to: the printing number, the two-dimensional code and the pattern or the number formed by the laser micropores on the surface of the base material.

In the above technical solution, the face characteristics include one or a combination of the following: the fiber characteristics under the preset position of the base material and the position relation between at least two pieces of seal order graphic text information in the face of the base material.

In the technical scheme, the face characteristic is arranged at a preset position on the base material, on one hand, the preset position on the base material is arranged at a local position on the base material to reduce the setting range of the face characteristic, thereby reducing the processing cost, on the other hand, when the user identifies the authenticity, only the face characteristic at the preset position of the base material is identified, thereby improving the identification speed, specifically, the face characteristic is one or more combinations in the position relationship between at least two seal sequence graphic and text information in the face of the fiber characteristic and the base material, the position relationship between at least two seal sequence graphic and text information in the face of the fiber characteristic and the base material is identified, thereby identifying the authenticity of the encrypted anti-counterfeiting element, the processing characteristic can be obtained through a first encryption rule through one or more different face characteristics in the position relationship between at least two seal sequence graphic and text information in the face of the fiber characteristic and the base material, therefore, the processing characteristic and the face characteristic have the unique and determined corresponding relation, and the counterfeiting difficulty of the encryption anti-counterfeiting element is improved.

Wherein each print order graphic information includes, but is not limited to, graphic information printed through an offset printing process, graphic information printed through an intaglio printing process, graphic information printed through a screen printing process, and graphic information printed through a relief printing process.

It can be understood that when the substrate enters the printing machines of different printing procedures, the positioning of the substrate in the printing machines is different, so that the position relation between the image-text information printed by different printing procedures is random, and the imitation difficulty of the encrypted anti-counterfeiting element can be effectively improved by generating the processing characteristic through the random printing procedure image-text information.

In the above technical scheme, the face characteristic is a geometric characteristic of at least one fiber in a preset position in the base material, wherein the fiber specifically includes: material fiber of the base material and release fiber of the base material.

In the technical scheme, the face characteristic of the paper is the geometric characteristic of at least one fiber in the preset position, so that when the authenticity of the encryption anti-counterfeiting element is identified, the authenticity of the encryption anti-counterfeiting element is judged through the identification of the geometric characteristic of at least one fiber in the preset position in the base material.

The fibers may be fibers of the material (i.e., material fibers of the base material) used to manufacture the security element itself, such as wood fibers and cotton fibers, or fibers of other materials (i.e., release fibers of the base material) may be incorporated into the manufacture of the security element to identify the security element by using a plurality of different fiber characteristics.

In the above technical solution, the number of the fibers is one, and the geometric characteristic of at least one fiber is the projection length of one fiber in the length direction of the base material and the projection length of the fiber in the width direction of the base material; and/or the geometric characteristics are the length and width of the smallest rectangle covering a fiber and the smallest angle between the smallest rectangle and the length direction of the substrate.

In the technical scheme, the number of the fibers is one, and according to the projection length of the fibers in the length direction of the base material and the projection length of the fibers in the width direction of the base material, the processing characteristics are obtained through a first encryption rule, or the processing characteristics are obtained through the length and the width of a minimum rectangle covering one fiber, and the minimum included angle formed between the minimum rectangle and the length direction of the base material according to the first encryption rule, or the processing characteristics are obtained through the projection length of the fibers in the length direction of the base material, the projection length of the fibers in the width direction of the base material, the length and the width of the minimum rectangle covering one fiber, and the minimum included angle formed between the minimum rectangle and the length direction of the base material according to the first encryption rule, so that the identification of the encrypted anti-counterfeiting element is facilitated.

In the above technical solution, the number of the fibers is multiple, wherein at least one of the fibers has a geometric characteristic that a projection length of a midpoint connecting line of any two fibers in a length direction of the base material and a projection length of a midpoint connecting line of any two fibers in a width direction of the base material; and/or the geometric characteristic of at least one fiber is that the minimum included angle is formed between the midpoint connecting line of any two fibers and the length direction of the base material; and/or the geometric feature of at least one fiber is the textured shape formed by the plurality of fibers.

In the technical scheme, the number of the fibers is multiple, and the processing characteristics are obtained through a first encryption rule according to the projection length of the midpoint connecting line of any two fibers in the length direction of the base material and the projection length of the midpoint connecting line of any two fibers in the width direction of the base material; or the processing characteristics are obtained according to a first encryption rule through a minimum included angle formed between a midpoint connecting line of any two fibers and the length direction of the base material, specifically, when the encryption anti-counterfeiting element is identified by using identification equipment or an instrument, if the information obtained according to the geometric characteristics of any two fibers is consistent with the processing characteristics, the encryption anti-counterfeiting element can be judged to be true, otherwise, the encryption anti-counterfeiting element is judged to be false; or the processing characteristics are obtained through the first encryption rule according to the projection lengths of the midpoint connecting lines of any two fibers in the length direction of the base material and the width direction of the base material and the minimum included angle formed between the midpoint connecting line of any two fibers and the length direction of the base material, so as to identify the authenticity of the encrypted anti-counterfeiting element; or the texture shape formed by the plurality of fibers is used for judging the authenticity of the encryption anti-counterfeiting element, for example, if the plurality of fibers form a circle, the processing characteristic can be obtained according to the geometrical characteristic of the circle according to the first encryption rule, specifically, when the encryption anti-counterfeiting element is identified by an identification device or an instrument, if the information obtained according to the geometrical characteristic of any circle is consistent with the processing characteristic, the encryption anti-counterfeiting element can be judged to be true, otherwise, the encryption anti-counterfeiting element is judged to be false.

In the above geometric characteristics of at least one fiber, any two or three of the above geometric characteristics may be selected, and the processing characteristics may be obtained according to the first encryption rule. In the above technical solution, the positional relationship between at least two pieces of signature information in the face of the base material specifically includes: the minimum distance between any two pieces of printed sequence graphic information in the length direction of the base material; and/or the minimum distance of any two pieces of printed graphic and text information in the width direction of the base material; and/or an included angle is formed between a connecting line between any two pieces of seal order image and text information and the length direction of the base material; and/or an included angle is formed between a connecting line between any two pieces of printed sequence picture and text information and the width direction of the base material.

In the technical scheme, the position relationship between two printed sequence chart information in the face of the base material comprises various different conditions, and the processing characteristics are obtained through a first encryption rule according to the position relationship between one or more kinds of two printed sequence chart information; or the position relation between the two pieces of sequencing printed image and text information is the minimum distance between any two pieces of sequencing printed image and text information in the width direction of the base material, and the processing characteristics are obtained under the first encryption rule according to the minimum distance between any two pieces of sequencing printed image and text information in the width direction of the base material; or the position relation between the two pieces of sequence printing graphic and text information is an included angle formed between a connecting line between any two pieces of sequence printing graphic and text information and the length direction of the base material, and the processing characteristics are obtained under the first encryption rule according to the included angle formed between the connecting line between any two pieces of sequence printing graphic and text information and the length direction of the base material; or the position relation between the two pieces of sequence printing graphic and text information is an included angle formed between a connecting line between any two pieces of sequence printing graphic and text information and the width direction of the base material, and the processing characteristics are obtained under the first encryption rule according to the included angle formed between the connecting line between any two pieces of sequence printing graphic and text information and the width direction of the base material.

It should be noted that the position relationship between at least two pieces of the ordering graphic information may be a combination of any two, a combination of any three, or a combination of all the above four position relationships.

In the above technical solution, the first encryption rule is a correspondence between the face characteristic and the character information, and at least one face characteristic generates the character information according to the first encryption rule.

In this technical scheme, through the face of the note characteristic according to first encryption rule generation character information, make the information in character information and the processing characteristic correspond to do benefit to the differentiation of the true and false of encryption anti-counterfeiting component, and improve encryption anti-counterfeiting component's anti-fake effect, specifically, when discerning encryption anti-counterfeiting component through identification equipment or instrument, can obtain corresponding character information according to face of the note characteristic, if character information is unanimous with the processing characteristic, then explain encryption anti-counterfeiting component is true, otherwise encrypt anti-counterfeiting component and be false.

In the above technical solution, at least one face characteristic generates character information according to a first encryption rule, and specifically includes: at least one face characteristic generates a plurality of binary bytes according to a first encryption rule; generating decimal digits according to the number of the same kind of digits in each binary byte, and taking the decimal digits as character information; or generating decimal digits according to the digits of the preset digits of the decimal digits corresponding to each binary byte, and taking the decimal digits as character information.

In the technical scheme, binary numbers are generated by correspondingly generating the face characteristic information according to a first encryption rule, then decimal numbers are generated by the binary numbers according to different rules, the decimal numbers are used as character information, and specifically, the decimal numbers generated by the binary numbers have two modes: the first mode is as follows: generating decimal digits according to the number of like digits in each binary byte, for example, if the face characteristic information is the minimum distance between any two pieces of printed sequence diagram information in the length direction of the base material and the minimum distance between any two pieces of printed sequence diagram information in the width direction of the base material, wherein the minimum distance between any two pieces of printed sequence diagram information in the length direction of the base material is 8 mm, the minimum distance between any two pieces of printed sequence diagram information in the width direction of the base material is 6 mm, the binary byte of 8 is 1000, the binary byte of 6 is 110, according to the first encryption rule, in the first byte 1000, the number of the number 1 is 1, the number of the number 0 is 3, according to the first byte, the number of the number 1 is 13, in the second byte 110, the number of the number 1 is 2, the number of 0 is 1, according to the second byte, the number of the character obtained according to the second byte is 21, the resulting character information is 1321; the second mode is as follows: generating decimal digits according to digits of preset digits of the decimal digits corresponding to each binary byte, specifically, taking the same face characteristic as an example, if the face characteristic information is the minimum distance between any two pieces of printed sequence graphic and text information in the length direction of the base material and the minimum distance between any two pieces of printed sequence graphic and text information in the width direction of the base material, wherein the minimum distance between any two pieces of printed sequence graphic and text information in the length direction of the base material is 8 mm, the minimum distance between any two pieces of printed sequence graphic and text information in the width direction of the base material is 6 mm, the binary byte of 8 is 1000, the binary byte of 6 is 110, the preset digit of the first byte 1000 is 4 according to the first encryption rule, the character obtained according to the first byte is 4, the preset digit of the second byte 110 is 3, the character obtained according to the second byte is 3, and the obtained character information is 43, understandably, character information is generated by the binary bytes according to set rules by converting the face characteristic information into the binary bytes, so that the character information corresponding to the face characteristic information is obtained, and the character information is obtained according to the first encryption rule through the face characteristic information, so that the character information has uniqueness, and the authentication of the encryption anti-counterfeiting element is facilitated.

At least one of the face features may further generate a carry count system different from a binary system according to the first encryption rule, including but not limited to 8, 10, and 16 systems.

In the above technical solution, the processing features specifically include: at least one printed character arranged on the base material, wherein the at least one printed character corresponds to at least part of character information; and/or at least one microwell character, each microwell character comprising a plurality of microwells recessed inwardly from at least one side of the substrate, and at least one microwell character corresponding to at least a portion of the character information.

In the technical scheme, the base material is provided with at least one printing character, so that the printing quantity of the encrypted anti-counterfeiting element can be conveniently controlled, and the information such as specific production, distribution and the like of the encrypted anti-counterfeiting element can be inquired through the printing character. The at least one micropore character corresponds to at least part of the printed characters, namely, a certain corresponding relation exists between the micropore character and the printed characters, particularly, the printed characters correspond to each encryption anti-counterfeiting element one by one, so that the printing anti-counterfeiting element has uniqueness, namely, each encryption anti-counterfeiting element has an independent printed character, on the basis, the micropore character corresponds to the printed characters, so that the micropore character also has certain uniqueness, and therefore, when the authenticity is identified, the micropore characters can be distinguished according to the unique micropore characters, and the counterfeiting cost is greatly improved.

Specifically, the number of the micro-porous characters and the number of the printed characters may be one or more.

The micro-hole characters and the printing characters can be corresponding to one character or a plurality of characters, and even the micro-hole characters and the printing characters can be completely corresponding.

In addition, the micropore character and the printing character can be arranged on the same side of the base material, and can also be respectively arranged on two sides of the base material.

In the above technical solution, each of the micro-hole groups forms a micro-hole character having different degrees of visibility under reflected light and transmitted light, wherein when the character type of the printed character is a number or a letter, the micro-hole character can be obtained from the printed character according to a second encryption rule; when the character type of the printed character is a pattern, the printed character can be obtained from the micro-porous character according to the second encryption rule.

In the technical scheme, the visible degrees of the micropore characters under the reflection light and the transmission light are different,

the encryption anti-counterfeiting element is identified by comparing different visibilities of the reflected light and the transmitted light through the micropore character, specifically, the encryption anti-counterfeiting element can be judged to be true when the visible degrees of the micropore character are different under the two lights of the reflected light and the transmitted light, the encryption anti-counterfeiting element can be judged to be false when the visible degrees of the micropore character are the same under the two lights of the reflected light and the transmitted light, wherein if the character type of the printed character is a number or a letter, the micropore character is obtained through a second encryption rule according to the printed character, or if the character type of the printed character is a pattern, the printed character is obtained through the second encryption rule according to the micropore character, so that the micropore character and the printed character have a uniquely determined corresponding relationship to facilitate the identification of the encryption anti-counterfeiting element, specifically, when the type of the printed character is a number or a letter, a user obtains the micropore character according to the second encryption rule through the, if the character type of the printed character is the pattern, the micropore character obtains the printed character according to the second encryption rule, and then the encrypted anti-counterfeiting element can be judged to be true, so that more identification methods are provided for users.

For example, when the type of the printed character is a number, the second encryption algorithm may be an algorithm, for example, the encryption rule is that an even number in the printed character is divided by 2 to obtain a number in the micropore character, so as to identify the authenticity of the encryption anti-counterfeiting element; when the type of the printed character is a pattern, the micropore character is encrypted through the second encryption rule to obtain patterns such as a two-dimensional code with a function of recording data information, namely the printed character, so that a user can identify the printed character through intelligent equipment, and the identified recorded data information is the micropore character, so that in the pattern of the printed character in each encrypted anti-counterfeiting element, the recorded data information only corresponds to the micropore character of the encrypted anti-counterfeiting element, the printed character and the micropore character have a uniquely determined corresponding relation, the counterfeiting difficulty of the encrypted anti-counterfeiting element is improved, and the identification of the user is facilitated.

In the above technical solution, the character types of the microporous character specifically include: numbers, letters, patterns; the character types of the printed characters specifically include: numbers, letters, patterns.

In this technical solution, the character types of the character passing through the minute hole include: the number, letter and pattern can be different types of choices, and the microporous character can be a number, a letter and a pattern, can also be a combination of any two of the number, the letter and the pattern or a combination of the number, the letter and the pattern. The character types by printing characters specifically include: numbers, letters, patterns, allowing different types of choices for printed characters. The character brush can be a number, a letter and a pattern, and can also be a combination of any two of the number, the letter and the pattern or a combination of the number, the letter and the pattern.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 shows a schematic view of a cryptographic security element according to one embodiment of the invention;

FIG. 2 shows a schematic view of a cryptographic security element according to one embodiment of the invention;

FIG. 3 shows a schematic view of a cryptographic security element according to one embodiment of the invention;

FIG. 4 shows a schematic view of a cryptographic security element according to one embodiment of the invention;

FIG. 5 shows a schematic representation of the geometric features of a fiber according to one embodiment of the present invention;

FIG. 6 shows a schematic representation of the geometric features of a fiber according to one embodiment of the present invention;

FIG. 7 shows a schematic representation of the geometric features of a fiber according to one embodiment of the present invention;

FIG. 8 shows a schematic view of a cryptographic security element according to one embodiment of the invention;

FIG. 9 shows a schematic view of a micro-porous character according to one embodiment of the invention;

FIG. 10 shows a schematic view of a micro-porous character according to one embodiment of the invention;

FIG. 11 shows a schematic diagram of a micro-porous character, according to one embodiment of the invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 11 is:

1 substrate, 2 face features, 3 processing features, 22 fibers, 24 graphic and text information, 32 printed characters and 34 micro-hole characters.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Some embodiments according to the invention are described below with reference to fig. 1 to 11.