WO2009025454A2 - Bloc numérique à commutateur à toucher lisse - Google Patents

Bloc numérique à commutateur à toucher lisse Download PDF

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Publication number
WO2009025454A2
WO2009025454A2 PCT/KR2008/004323 KR2008004323W WO2009025454A2 WO 2009025454 A2 WO2009025454 A2 WO 2009025454A2 KR 2008004323 W KR2008004323 W KR 2008004323W WO 2009025454 A2 WO2009025454 A2 WO 2009025454A2
Authority
WO
WIPO (PCT)
Prior art keywords
switch circuit
circuit pattern
transparent
horizontal
vertical
Prior art date
Application number
PCT/KR2008/004323
Other languages
English (en)
Other versions
WO2009025454A3 (fr
Inventor
Soon Hyeong Kwon
Original Assignee
Essdesign
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Essdesign filed Critical Essdesign
Publication of WO2009025454A2 publication Critical patent/WO2009025454A2/fr
Publication of WO2009025454A3 publication Critical patent/WO2009025454A3/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/0202—Constructional details or processes of manufacture of the input device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof

Definitions

  • the present invention relates to a key pad with plain touch switch made to add a transparent touch switch to a display protection screen.
  • the present invention relates to a key pad of electric capacity with plain touch switch which adds a switching function to display protection screen made of transparent acryl or glass, where a printed or etched pattern of an electric circuit; made of transparent conductive material; is formed on the bade of the touching surface. The pattern is operated by connecting to an operating IC module of a touch switch.
  • Transparent touch switch in the general process of embodying a switch which is operated by sensing the changes in electric capacity, a printed or etched pattern of an electric circuit; made of transparent conductive material; is layer-built on the bade of the touching surface, or a conductive material is layer-built on film, which is attached to inner surface of display protection screen, forming a switch.
  • a switch is formed by forming a switching pattern on one surface of film, which is attached to the entire surface of display screen or protection screen, an additional protection film or plate is applied on the surface.
  • a pattern is layer-built on inner surface of display screen protection seal, or film with layer built pattern is attached on inner surface of display screen protection seal, each patterns having uniform dimensions that are separate and independent, and each are connected to the operating IC module in the scale of 1:1.
  • each switch is given a pattern of an independent dimension.
  • the surface area is increased as the sensitivity is also increased, causing an advantageous effect of preventing operational damage even when scratches are formed on surface of display screen protection seal, as it enables the usage of inner surface of display screen protection seal.
  • it has a disadvantage of increasing the cost of IC as the size of chip is increased according to increasing numbers of inner switches needed for 1 : 1 connection in the operation IC module.
  • the object of the present invention is to overcome the previous problems and to provide a key pad with plain touch switch.
  • a switching function to a display screen protection film; or protection board; made of transparent acryl or glass, transparent conductive material is printed as a circuit or etched as a pattern on to the opposite side to the touching side of the screen, and the pattern is constructed in a matrix form, allowing more switches compared to the touch switch process and easier manufacturing process compared to touch screen process.
  • the procedure example 1 to achieve the goal stated above is creating a touch switch keypad by printing or etching transparent conductive material on to display protection screen made of transparent acryl or glass.
  • the material is formed horizontally in columns and each switch key has a uniform dimension. It comprises the surface of the above horizontal pattern of conductive material and requires application of insulator 1 on inner surface except for the terminal.
  • the horizontal switch circuit pattern forms a matrix with the rows of vertical switch circuit patterns; where each switch key is given its own uniform dimension.
  • the terminal part connects to the terminal on the outer touch switch operation IC module, which is formed by vertical and horizontal circuit patterns connected on one surface of the transparent board.
  • the procedure example 2 is applying a switch function to the inner surface of the display screen protection film; or protection board; made of transparent acryl or glass, and the transparent conductive material is printed as a circuit; or etched as a pattern; in columns of horizontal directions, where each switch key is given its own uniform dimension.
  • Insulator No. 1 is applied on to the surface; except for the terminal; of the horizontal switching circuit pattern of the conductive material.
  • the transparent conductive material is connected in columns by printing or etching on to the inner surface of the transparent film.
  • the invention comprises of vertical switch circuit pattern, where each switch key is given a uniform dimension; outer surface of the upper vertical switch circuit pattern of the conductive material; insulator 2 applied on to the inner surface of the transparent film except for the terminal; a transparent film, which is layer-built over insulator 1 of the transparent board, where a matrix structure is formed between vertical and horizontal switch circuit patterns stated above; and the insulating part 1 and 2 connected to the insulator on the outer touch switch operation IC module, which is formed by vertical and horizontal circuit patterns connected on one surface of the transparent board.
  • the procedure example 3 refers to the present invention comprising of a transparent board made of transparent acryl or glass; a transparent film layer-built on inner surface of the above transparent board; a horizontal switch circuit pattern applied so that each switch is given a uniform dimension, where conductive material is printed or etched on to one side of the transparent film; insulator 1 applied on to the outer surface of the horizontal switch circuit pattern of the conductive material; matrix structure formed between vertical and horizontal switch circuit patterns; vertical switch circuit patterns with each switch key given a uniform dimension; a terminal part connected to the terminal on the outer switch operation IC module formed on one side of the transparent film; outer surface of the vertical switch circuit pattern of the conductive material; and the insulator 2 applied to inner surface, except for the terminal, of insulator 1
  • the procedure example 4 refers to the present invention comprising of a transparent film; columns of numerous conductive materials printed or etched on to the transparent film mentioned above; a horizontal switch circuit pattern with each switch key given uniform dimensions; columns of numerous conductive materials printed or etched on to the transparent film mentioned above in the matrix structure with the horizontal switch circuit pattern; vertical switch circuit pattern with each switch key given uniform dimensions; a terminal part connected to the terminal formed on the outer switch operation IC module formed on one side of the transparent film; the insulating part 1 and 2 applied to the outer surface of the vertical and horizontal switch circuit patterns, excluding the terminals, of the conductive material; and the transparent board made of transparent acryl or glass, with a transparent film layer-built on its inner surface.
  • the procedure example 5 refers to the present invention comprising of a transparent film 1 and 2 of a certain surface area applied in the matrix structure formed without overlapping between vertical and horizontal switch circuit patterns; vertical switch circuit patterns with each switch key given a uniform dimension, where the conductive material is printed or etched in columns of vertical and horizontal direction on one side of transparent film 1 and 2; the terminal part 1 and 2 applied to the outer surface of the vertical and horizontal switch circuit patterns, excluding the terminals, of the conductive material; outer surface of the vertical and horizontal switch circuit pattern of the conductive material; and the insulator 1 and 2 applied to one side of transparent film 1 and 2, excluding the terminal part.
  • the procedure example 6 refers to the present invention comprising of a transparent film 1 and 2 of a certain surface area applied in the matrix structure formed without overlapping between vertical and horizontal switch circuit patterns; vertical switch circuit patterns with each switch key given a uniform dimension, where the conductive material is printed or etched in columns of vertical and horizontal direction on one side of transparent film 1 and 2; the terminal part 1 and 2 applied to the outer surface of the vertical and horizontal switch circuit patterns, excluding the terminals, of the conductive material; outer surface of the vertical and horizontal switch circuit pattern of the conductive material; the insulator 1 and 2 applied to one side of transparent film 1 and 2, excluding the terminal part; and a transparent board with either one of transparent film 1 or 2 layer-built on its inner surface, where the transparent film is made of transparent acryl or glass.
  • Figure 1 (a)-(e) are process perspective view referring to the procedure example 1
  • Figure 2 (a)-(g) are process perspective view referring to the procedure example 2
  • Figure 3 (a)-(f) are process perspective view referring to the procedure example 3
  • Figure 5(a)-(g) are process perspective view referring to the procedure example 5
  • Figure 6(a)-(h) are process perspective view referring to the procedure example 6
  • Figure 1 (a)-(e) are process perspective view referring to the procedure example 1 stated above.
  • the invention comprises of a transparent board(l) made of transparent acryl or glass which is used as display protection screen; a horizontal switch circuit pattern (4) with each switch key given uniform dimensions; columns of numerous conductive materials printed or etched on to a transparent film; insulatorl (6) applied to outer surface, except for terminal part(8), of the upper horizontal switch circuit pattern(4) of conductive material; a vertical switch circuit pattern(5) with each switch key given uniform dimensions, formed in columns so that it forms a matrix structure with the horizontal switch circuit pattern(6) on the surface of the insulator 1 (6) mentioned above; a terminal part (8) connecting to a terninal(l 1) on the outer touch switch operation IC nr)dule(l ⁇ ) formed on one side of the transparent film(l) connected to vertical and horizontal switch
  • Figure 2 (a)-(g) are process perspective view referring to the procedure example 2 stated above.
  • the invention comprises of a transparent board (1) made of transparent acryl or glass which is used as display protection screen; a horizontal switch circuit pattern(4) with each switch key given uniform dimensions with columns of numerous conductive materials printed or etched on to the transparent film mentioned above; the outer surface of horizontal switch circuit pattern(4) of conductive materials; insulator 1(6) applied to inner surface, except for the terminal part(8), of the transparent board(l); a vertical switch circuit pattern(5) with each switch key given uniform dimensions; columns of numerous transparent conductive materials printed or etched on to the inner surface of a transparent film(2); a transparent film(2) layer built over the insulator 1(6) of the transparent board(l) where horizontal and vertical switch circuit pattern (4)(5) form a matrix structure; a terminal parti and 2 (8a)(8b) connecting to a terninal(l 1) on the outer touch switch operation IC nr)dule(l ⁇ ) formed on one side of the transparent film(
  • Figure 3 (a)-(e) are process perspective view referring to the procedure example 3 stated above.
  • the invention comprises of a transparent board(l) made of transparent acryl or glass; a transparent film(2) layer-built on inner surface of the above transparent board(l); a horizontal switch circuit pattern (4)applied so that each switch is given a uniform dimension, where conductive material is printed or etched on to one side of the transparent film(2); insulator 1(6) applied on to the outer surface of the horizontal switch circuit pattern(4) of the conductive material; matrix structure formed between horizontal and vertical switch circuit patterns(4)(5); vertical switch circuit patterns(5) with each switch key given a uniform dimension; a terminal part(8) connected to the terminal on the outer switch operation IC nx)dule(l ⁇ ) formed on one side of the transparent film(2); and insulator 2(7) applied to the outer surface of the mentioned vertical switch circuit pattern(5) of the conductive material, except for the terminal part(8), where neither the vertical nor the horizontal switch circuit pattern(4)(5) overlap each other and the meeting point is set up to form one touch pattern.
  • Figure 4(a)-(e) are process perspective view referring to the procedure example 4 stated above.
  • the invention comprises of a transparent film(2) of a certain surface area; columns of numerous conductive materials printed or etched on to the transparent film(2) mentioned above; a horizontal switch circuit pattern (4) with each switch key given uniform dimensions; columns of numerous conductive materials printed or etched on to the transparent film(2) mentioned above in the matrix structure with the horizontal switch circuit pattern (4); vertical switch circuit pattern(5) with each switch key given uniform dimensions; a terminal part(8) connected to the terninal(l 1) formed on the outer switch operation IC nr)dule(l ⁇ ) formed on one side of the transparent film(2); the insulating part 1 and 2(6)(7) applied to the outer surface of the vertical and horizontal switch circuit patterns(4)(5), excluding the terninals(l 1), of the conductive material; the transparent board(l) made of transparent acryl or glass, with a transparent film(2) layer-built on its inner surface; and insulator 2(7) applied to the outer surface of the mentioned vertical switch circuit pattern(5) of the conductive material, except for the terminal part(8), where neither the vertical nor the
  • Figure 5(a)-(g) are process perspective view referring to the procedure example 5 stated above.
  • the invention comprises of a transparent film
  • Figure 6(a)-(h) are process perspective view referring to the procedure example 6 stated above.
  • the invention comprises of a transparent film
  • the present invention comprises of a horizontal and vertical switch circuit pattern(4)(5) applied form a matrix structure with each switch key given uniform dimensions, where transparent conductive material is printed or etched on to the surface of transparent film 1 and 2 (2a)(2b); a terminal part 1 and 2 (8a)(8b) connected to the terninal(l 1) on the outer switch operation IC nr)dule(l ⁇ ) formed on one side of the transparent film(2); outer surface of the vertical and horizontal switch circuit pattern(4)(5) of the conductive material and an insulator 1 and 2(6)(7) applied to one side of transparent film 1 and 2 (2a) (2b), excluding the terminal part(8); a transparent board with either one of transparent film 1 or 2 (2a) (2b) layer-built on its inner surface, where the transparent film(2) is made of transparent acryl or glass; and neither the vertical nor the horizontal switch circuit pattern(4)(5) overlap each other and the meeting point is set up to form one touch pattern.
  • the manufactured transparent touch key pad is completed via the following procedures.
  • Transparent conductive material is printed or etched on the inner surface of a transparent board(l) made of transparent acryl or glass as shown in figure 1 (a) made into columns as shown in figure l(b), forming a horizontal switch circuit pattern, where each switch key is given a uniform dimension.
  • the terminal part (8) is connected to the horizontal switch circuit pattern (4) which is formed on one side of the transparent board (1).
  • a transparent insulator 1 (6) is formed by applying a transparent insulator over the whole surface, except for the terminal, of the horizontal switch circuit pattern (4) as shown in figure 1 (c).
  • Transparent conductive material is printed or etched on to the outer surface of insulator 1(6) to form a matrix structure with the horizontal switch circuit pattern (4) in columns as shown in figure l(d), where each switch key is given uniform dimensions.
  • a vertical switch circuit pattern is connected to a terminal part (8) electrically connected to a terninal(l 1) on an outer touch operation IC module (10) which is formed on one side of the transparent board (1).
  • a terminal on the switch operation IC module (10) connected to the terminal (11) connected to the terminal part (8) on one side of transparent board is connected to display control tool (not illustrated), forming a key pad of transparent switch.
  • the procedure example 1 prevented the insertion of unspecific substances or dust by applying insulator 2(7) made of conductive material on the outer surface of the vertical switch circuit pattern(5) which connects to a terninal(l 1) on the outer switch operation IC module(l ⁇ ) and the vertical switch circuit pattern(5).
  • a switch circuit pattern of the key board can be formed by printing other than etching.
  • the formed transparent touch switch keypad uses only of a simple transparent board, reducing the manufacturing cost and producing a more transparent product.
  • a transparent board (1) made of transparent acryl or glass is used as display protection screen; a horizontal switch circuit pattern (4) with each switch key given uniform dimensions with columns of numerous conductive materials is printed or etched on to the transparent film (2), many connected in each horizontal column, as shown in figure 2 (b).
  • insulator 1 (6) When the formation of the horizontal switch circuit pattern using conductive material is complete, insulator 1 (6); described further on; can be formed by being applied on to the horizontal switch circuit pattern(4) excluding the terminal part(8). At needs, the transparent film (2) can be directly layer-built on to the outer surface of the transparent board (1), and in that case, the insulator 1 (6) may not be formed.
  • the vertical switch circuit pattern (5) is formed in columns; composed of many switch keys; on a limited area of transparent film (2) by printing or etching transparent conductive material, where each switch key is given uniform dimensions.
  • a switch circuit pattern of the key board can be formed by printing other than etching.
  • a horizontal switch circuit pattern (5) is formed in columns; composed of many switch keys; on a limited area of transparent film (2) by printing or etching transparent conductive material, where each switch key is given uniform dimensions.
  • insulator 1 (6) is formed by applying transparent insulator on to the outer surface; except for the terminal part(8); of the horizontal switch circuit pattern(4) as shown in figure 3 (c).
  • the vertical switch circuit pattern (5) with each switch key given uniform dimensions, forms a matrix structure with the horizontal switch circuit pattern(4) above by printing or etching transparent conductive material on to the outer surface of insulator 1(6).
  • a terminal part (8) which is to electrically connect with a terminal (11) on outer switch operation IC nr)dule(l ⁇ ); is connected to vertical switch circuit pattern(5) each on one side of the transparent board(l) when forming the vertical switch circuit pattern(5) above.
  • terminal part(8) gathered on one side of transparent film (2); connects with the display control tool (not illustrated) and forms the transparent touch switch keypad, as shown in the figure 3(f).
  • a switch circuit pattern of the key board can be formed by printing other than etching.
  • the horizontal switch circuit pattern (5) is formed in columns; composed of many switch keys; on a limited area of transparent film (2) by printing or etching transparent conductive material, where each switch key is given uniform dimensions.
  • insulator 1 (6) can be formed by being applied on to the horizontal switch circuit pattern (4) excluding the terminal part (8).
  • the transparent film (2) can be directly layer-built on to the outer surface of the transparent board (1), and in that case, the insulator 1 (6) may not be formed.
  • the horizontal switch circuit pattern (4) is formed in columns; composed of many switch keys; on the other side of transparent film (2); explained above; by printing or etching transparent conductive material, forming a matrix structure with the vertical switch circuit patter(5), where each switch key is given uniform dimensions.
  • the transparent touch switch is completed by layer-building horizontal switch circuit pattern (4); on one side of transparent film (2); directly to the transparent board (1), or insulator 1 (6) directly to the transparent board (1).
  • a switch circuit pattern of the key board can be formed by printing other than etching.
  • the vertical switch circuit pattern (5) is formed in columns; composed of many switch keys; on a limited area of transparent filml and 2 (2a)(2b);as shown in figure5(d); by printing or etching transparent conductive material; as shown in figure 5(e); many in each columns in vertical and horizontal directions, where each switch key is given uniform dimensions, forming horizontal and vertical switch circuit pattern(4)(5).
  • Insulator 1 (6) can be formed by applying transparent insulator on to the outer surface of the transparent film l(2a); where horizontal circuit pattern (4) is formed; out of insulator land 2(2a) (2b), horizontal switch circuit pattern (4) excluding the terminal part l(8a), as shown in figure.
  • the transparent film (2) can be directly layer-built on to the outer surface of the transparent board (1), and in that case, the insulator 1 (6) may not be formed.
  • the transparent touch switch keypad is formed by connecting a display control tool
  • the circuit pattern of the keypad can be formed by printing, not etching.
  • the procedure example 6 is the same with the procedure example 5 with a transparent board (1) in addition.
  • the function of the transparent touch keypad is independent to the order of installing horizontal and vertical switch circuit pattern(4)(5); formed on to the transparent board(l) or the transparent film 1 and 2 (2a) (2b) exposed.
  • the display protection screen made of transparent acryl or glass can be also used as a front panel, so when needed, the transparent acryl or glass can be coated or printed to be half-transparent or opaque.
  • the transparency of the transparent touch switch keypad can be increased by applying more of the transparent material according to need, or by attaching scratch-proof material or film onto the surface (the touched side) of the transparent touch switch keypad.
  • each horizontal and vertical switch circuit pattern (4) is formed in 3 columns with 4 square key patterns in each column, and the vertical switch circuit pattern (5) is formed in 4 columns with 3 outline-figured key patterns.
  • the shape of each horizontal and vertical switch circuit patterns(4)(5) can be of other shaped than square, such as circular, but however, to achieve the sensitivity enough to pass through the transparent board(l), it requires surface area larger than the minimum number of m ⁇ f.
  • a touch switch operation IC module(l ⁇ ) with 7 channels is needed, as there are 7 channels; 3 horizontal channels and 4 vertical channels; to be connected.
  • the manufacturing cost is decreased according to the decreased size of touch switch operation IC module (10), as only 7 vertical and horizontal channels are needed in the matrix structure, wherein the separate key structure needs 12.
  • the separate key structure forms 12 keys; therefore 12 channels; but in the matrix structure can form up maximum of 36 (6x6) keys.
  • 16 channels form keys; where in the matrix structure a maximum of 64(8x8) keys can be attained.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Manufacture Of Switches (AREA)
  • Push-Button Switches (AREA)
  • Contacts (AREA)

Abstract

La présente invention concerne un bloc numérique à commutateur à toucher lisse comportant un clavier transparent réalisé en acryle ou verre transparent servant d'écran de protection d'affichage ; un motif de circuit de commutateurs horizontal constitué de colonnes d'une pluralité de touches dans chacune d'elles, chaque touche ayant des dimensions uniformes, gravée ou imprimée dans une surface interne dudit film transparent; un isolant (1) appliqué à la surface extérieure du motif de circuit de commutateurs horizontal sauf pour la partie borne ; un motif de commutateurs vertical constitué de colonnes d'une pluralité de touches, chaque touche ayant des dimensions uniformes, relié au motif de circuit de commutateurs horizontal superposé pour former une structure matricielle sur la surface extérieure dudit isolant (1) ; la partie borne, qui est reliée à la borne sur le module de circuit intégré de fonctionnement de circuit de commutateur extérieur, où la borne est formée sur une face du clavier transparent et reliée au motif de circuit de commutateurs horizontal et vertical ; et un isolant (2) appliqué sur la surface du motif dudit circuit de commutateurs constitué du matériau conducteur, sauf la partie borne.
PCT/KR2008/004323 2007-08-23 2008-07-24 Bloc numérique à commutateur à toucher lisse WO2009025454A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0084731 2007-08-23
KR1020070084731A KR100801501B1 (ko) 2007-08-23 2007-08-23 투명 터치 스위치 키패드

Publications (2)

Publication Number Publication Date
WO2009025454A2 true WO2009025454A2 (fr) 2009-02-26
WO2009025454A3 WO2009025454A3 (fr) 2009-06-11

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Application Number Title Priority Date Filing Date
PCT/KR2008/004323 WO2009025454A2 (fr) 2007-08-23 2008-07-24 Bloc numérique à commutateur à toucher lisse

Country Status (2)

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KR (1) KR100801501B1 (fr)
WO (1) WO2009025454A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100978123B1 (ko) 2008-04-24 2010-08-26 한국터치스크린(주) 정전용량 방식 터치패널
KR101004405B1 (ko) * 2008-08-20 2010-12-28 이미지랩(주) 터치 패널

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5844506A (en) * 1994-04-05 1998-12-01 Binstead; Ronald Peter Multiple input proximity detector and touchpad system
WO2005098585A1 (fr) * 2004-04-08 2005-10-20 Gunze Limited Interrupteur sensitif transparent
KR20070077495A (ko) * 2007-07-04 2007-07-26 주식회사 이에스에스디 투명 터치 스위치

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06160118A (ja) * 1992-11-26 1994-06-07 Rika Kogyo Kk タッチスイッチ付き液晶表示装置
JPH08161969A (ja) * 1994-12-09 1996-06-21 Fujikura Ltd 透明タッチパネルの製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5844506A (en) * 1994-04-05 1998-12-01 Binstead; Ronald Peter Multiple input proximity detector and touchpad system
WO2005098585A1 (fr) * 2004-04-08 2005-10-20 Gunze Limited Interrupteur sensitif transparent
KR20070077495A (ko) * 2007-07-04 2007-07-26 주식회사 이에스에스디 투명 터치 스위치

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Publication number Publication date
KR100801501B1 (ko) 2008-02-12
WO2009025454A3 (fr) 2009-06-11

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