KR20090035189A - Touch window applied by mid technology - Google Patents

Abstract

A touch window including transparent electrode installed based on an MID technology in the form of a matrix or X/Y axis is provided to perform multi-touch by installing transparent electrode in a form of a matrix or X/Y axis. A window shelf(120) comprises an MID circuit wiring(190). A touch screen(110) and the window shelf are adhered to the conductivity intermediary(180). Transparency electrode wiring and MID circuit wiring are wired by the conductivity intermediary. A transparent electrode(130) is formed in the form of X/Y flat matrix. The touch screen is made of two films. The transparent electrode is formed in the upper side of the lower film and lower-part of the upper film. The transparent electrode and the transparent electrode formed in the upper film perpendicularly intersect from each other.

Description

Touch window applied by MID technology {Touch window applied by MID technology}

1 is a view for explaining a conventional touch window;

2 is a view for explaining a touch window according to a first embodiment of the present invention;

3 is a photograph for explaining a molded interconnected device (MID);

4 is a view for explaining a resistive touch window according to a second embodiment of the present invention;

5 is a view for explaining a capacitive touch window according to a third embodiment of the present invention.

<Description of reference numbers for the main parts of the drawings>

10a, 10b, 110a, 110b: touch screen film

10, 110: touch screen 20, 120: window fixture

30, 130, 130a, 130b: transparent electrode 40: flexible PCB

50: wiring formation space 60, 160: transparent glass

150a: transparent electrode wiring 150b: interface FPCB

180: conductive medium 190: MID circuit wiring

200: capacitive sensor IC

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch window, and more particularly, to a touch window in which circuit wiring is formed by MID (Molded Interconnected Device) technology.

Conventional touch windows are made of two or more films on which transparent electrodes are formed on both sides, and then a touch screen is manufactured first, and then the touch screen is again used as a window of an application set. It is formed by attaching the inside of the apparatus using an adhesive material.

1 is a view for explaining a conventional touch window, (a) is an exploded view, (b) is a plan view after assembly, (c) is a side view after assembly. Transparent electrodes 30 are formed on the upper surface of the lower touch screen film 10a and the lower surface of the upper touch screen film 10b, respectively. The portion where the transparent electrode 30 is formed will be an active area.

The lower touch screen film 10a and the upper touch screen film 10b are bonded to each other to form a touch screen 10, and an interface circuit is formed between the lower touch screen film 10a and the upper touch screen film 10b. Is provided with a flexible PCB 40 (hereinafter referred to as "FPCB").

The window mechanism 20 has a rim form in which the center portion is drilled, and the transparent glass 60 is fitted in the center drilled portion. The touch screen 10 is bonded by a non-conductive double-sided tape to the back of the window mechanism 20 so that the transparent electrode 30 is located at the bottom of the transparent glass 60.

In order to sense the surface input of the touch screen 10, a wire using a transparent electrode wiring and silver paste is formed on the touch screen 10. These wires are formed in narrow spaces on the left and right sides and the lower side except for the active area of the touch screen 10, and the portions indicated by the reference numeral 50 represent such a wire formation space.

In the case of the transparent electrode wiring, an increase in the resistance value due to length may cause a delay and an inoperability of the input signal. In addition, since the signal line is connected to an external control board only through a limited space of the flexible PCB 40, the number of wirings is limited due to the limitation of the width of the flexible PCB 40, and the wiring forming space 50 is narrow. The number of signal lines sent to the flexible PCB 40 is also limited. This is a factor that hinders the touch resolution of the touch screen 10.

In addition, since two transparent touch screen films must be used, luminance loss due to a decrease in transmittance is feared. In addition, since the touch screen film and window mechanism are manufactured separately, the process cost increases.

 Accordingly, an object of the present invention is to provide a touch window to which the MID technology is applied in order to solve the above-mentioned conventional problems.

The transparent electrode is preferably formed in the form of an XY plane matrix. In this case, the touch screen may be made of one film or two films may be bonded to each other. In the latter case, the transparent electrode is formed on the upper surface of the lower film and the lower surface of the upper film, wherein the one formed on the lower film and the one formed on the upper film are formed in rows and columns on each film so as to vertically cross each other.

The capacitive sensor IC connected to the transparent electrode wiring through the MID circuit wiring may be mounted on the window mechanism, and the capacitive sensor IC detects the multi-touch by changing the capacitance of the touch point.

The MID circuit wiring may be connected to a resistive film sensor, and the resistive film sensor detects the multi-touch through the voltage at the touch point.

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Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. The following embodiments are only presented to understand the content of the present invention, and those skilled in the art may make many modifications within the technical spirit of the present invention. Therefore, the scope of the present invention should not be construed as limited to these embodiments. Like reference numerals in the drawings denote components that perform the same function, and duplicate descriptions are omitted.

Example 1

2 is a view for explaining the touch window according to the first embodiment of the present invention, (a) is an exploded view, (b) is a plan view after assembly, and (c) is a side view after assembly.

The window mechanism 120 has a rim shape in which the center part is opened, and the transparent glass 160 is fitted in the center part. The MID circuit wiring 190 is formed at the edge of the window mechanism 120. The transparent electrode 130 is formed in the form of a matrix on the touch screen 110. The transparent electrode wire 150a extends from the transparent electrode 130 toward the edge of the touch screen 110.

Since the signal comes to the external control board through the MID circuit wiring 190 formed on the edge of the window mechanism 120, there is no need for a separate interface such as a conventional flexible PCB. Therefore, since the space is not limited, the transparent electrode wiring 150a can be formed as many as desired regardless of the up, down, left, and right directions. In addition, since the length of the transparent electrode wiring 150a is constant and the length of the MID circuit wiring 190 is adjusted instead, delay of an input signal and malfunction of the input signal due to the length of the transparent electrode wiring 150a can be minimized. have.

Since the space is not particularly limited in the formation of the transparent electrode wiring 150a, the transparent electrode 130 may be formed in a matrix on the single touch screen film. Therefore, according to the present invention, it is possible to implement multi-touch as compared to the conventional case in which the multi-touch cannot be implemented due to space limitations. The invention applies to both resistive touch screens as well as capacitive touch screens.

In the case of the resistive touch screen, the MID circuit wiring 190 may be connected to the resistive sensor which detects the multi-touch through the voltage of the touch point. In the case of the capacitive touch screen, the MID circuit wiring 190 may be connected to the touch point. It will be connected to the capacitive sensor IC that detects multi-touch through capacitance change.

The touch screen 110 and the window mechanism 190 are adhered due to the curing of the conductive medium 180, and the transparent electrode wiring 150a and the MID circuit wiring 190 are connected through the conductive medium 180.

3 is a photograph for explaining a molded interconnected device (MID), the MID circuit technology refers to a technique for printing a circuit on the inside or inside of the molded device as shown in the photograph.

Example 2

4 is a view for explaining a resistive touch window according to a second embodiment of the present invention, (a) is an exploded view, (b) is a plan view after assembly, and (c) is a side view after assembly.

Unlike FIG. 2, the touch screen 110 is formed by bonding two touch screen films, that is, the lower touch screen film 110a and the upper touch screen film 110b. Transparent electrodes 130a form a column on the upper surface of the lower touch screen 110a, and transparent electrodes 130b form a row on the lower surface of the upper touch screen 110b. Therefore, the transparent electrodes 130a and 130b form rows and columns on the touch screen 110 in which two pieces of touch screen film are bonded. The above point can be selected. Multi-touch allows you to effectively use features such as zooming in and out and scrolling specific parts of the screen on the display.

The touch screen 110 is provided with an interface FPCB 150b for the purpose of connecting the transparent electrode wiring (not shown) and the MID circuit wiring 190, and the transparent electrode wiring is assembled at the FPCB 150b.

Example 3

5 is a view for explaining a capacitive touch window according to a third embodiment of the present invention, (a) is an exploded view, (b) is a plan view after assembling.

The MID circuit wiring 190 is formed on the window mechanism 120, and the capacitive sensor IC 200 is connected to the MID circuit wiring 190. According to the intention of the user, a method of mounting an interface such as a connector instead of the capacitive sensor IC 200 may be considered.

The transparent electrode 130 is formed in a matrix on a single touch screen film. Since the transparent electrode wiring 150a is less restricted in space due to the installation of the MID circuit wiring 190, it is possible to form the transparent electrode 130 on a single touch screen film in a matrix form. It becomes possible. In addition, since the wiring can be as many as desired, the resolution of the touch window is remarkably improved, resulting in a more precise and sensitive touch sensor. The integrated touch window structure makes dust / moistureproof design easy in application.

As described above, according to the present invention, since the number of transparent electrode wirings is less limited by the application of the MID technology, the transparent electrodes can be installed in a matrix or XY axis, thereby enabling multi-touch.

Claims (6)

The window mechanism is formed in the center portion, and the window mechanism into which the window is fitted, the transparent electrode and the transparent electrode wiring extending from the transparent electrode, and the portion where the transparent electrode is formed under the window. In the touch window comprising a touch screen attached to, MID circuit wiring is formed on the window mechanism, and the touch screen and the window mechanism are bonded by a conductive medium, and the transparent electrode wiring and the MID circuit wiring are connected by the conductive medium. . The touch window of claim 1, wherein the transparent electrode is formed in an XY plane matrix. The touch window as set forth in claim 2, wherein the touch screen is made of a single film. The method of claim 2, wherein the touch screen is formed by bonding two films, and the transparent electrode is formed on the upper surface of the lower film and the lower surface of the upper film so that the one formed on the lower film and the upper film vertically cross each other. Touch windows, characterized in that formed in rows and columns on each film. 3. The capacitive sensor IC of claim 2, wherein the capacitive sensor IC connected to the transparent electrode wiring is mounted on the window mechanism through the MID circuit wiring, and the capacitive sensor IC detects the multi-touch by changing the capacitance of the touch point. Touch window, characterized in that. The touch window as set forth in claim 2, wherein the MID circuit wiring is connected to a resistive sensor, and the resistive sensor detects a multi-touch through a voltage at a touch point.

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