KR20110000978U - Capacitive sensing assembly of touch panel - Google Patents

Abstract

The capacitive sensing assembly of the contact panel includes a plurality of transparent x axis traces having a plurality of x axis sensing units and a plurality of transparent y axis traces having a plurality of connected y axis sensing units. The y axis traces are alternately arranged with the x axis traces so that the x axis sensing units and the y axis sensing units are arranged in a matrix in the operating area of the contact panel. The gaps between the x and y axis traces are arranged with dummy patterns. The capacitive sensing assembly of the contact panel also includes a lower substrate, an upper panel, and a capacitive sensing layer installed to connect the lower substrate and the upper panel. In the operating area of the contact panel, the capacitive sensing layer comprises a plurality of alternating sensing units and gaps between the sensing units embedded in dummy patterns.

Contact Panels, Capacitives, Sensing Assemblies, Dummy Patterns

Description

Capacitive sensing assembly of touch panel

The present invention relates to a touch panel, and more particularly, to a capacitive sensing assembly of a touch panel that can reduce the capacitance of noise and has a uniform transmittance distribution.

The capacitive touch panel can produce a capacitive effect by touching a finger on the screen of the panel. The change in capacitance can indicate the position of the finger. This achieves the purpose of transmitting signals. Operation is convenient because the signal input of the capacitive touch panel is performed via the finger. No pressure is required in the input operation, and the panel does not suffer from stress and deformation defects. The structure is simple and fewer components are used, while the yield ratio is high. Mass production may be possible at lower prices. Therefore, it is widely used in communication devices, computers, and other electrical appliances. Conventional capacitive sensing structures have a plurality of x-axis traces and a plurality of y-axis traces. The x axis trace has a plurality of x axis sensing units, and the y axis trace has a plurality of y axis sensing units. The x-axis traces and the y-axis traces are alternately arranged and insulated with respect to each other. The sensing units of the x-axis traces and the y-axis traces are arranged as a matrix on the operating area of the contact panel. In general, the x-axis trace and the y-axis trace consist of a transparent thin film, such as an indium tin oxide (ITO) material. In manufacture, the unwanted portions are removed by etching to form each sensing unit, so that the sensing units of the x-axis traces and the y-axis traces are spaced at appropriate gaps with an insulator. If this gap is too small, electromagnetic or capacitive interference occurs and the sensitivity and accuracy of the capacitive sense signals are degraded. If this gap increases, the portion with the capacitive sensing units and the portion without the capacitive sensing units are different, resulting in non-uniform light refraction on the panel. As a result, the image on the screen is distorted and deformed.

It is therefore an object of the present invention to provide a capacitive sensing assembly for a contact panel. Dummy patterns are embedded between the capacitive sensing units. The dummy patterns and the capacitive sensing units have the same transmittance, so that the gaps of the sensing units are significantly reduced. Thus, the flatness of the capacitive sensing assembly is increased and the transmittance becomes more uniform within the screen surface. The distortion in the display under the contact panel is improved. In order to reduce the capacitance of the noise, the gap provided in the capacitive sensing unit is increased.

이다. 상기 x 축 트레이스들 및 상기 y 축 트레이스들은, 동일한 투명 도전성 박막으로 구성된다. 바람직하게는, 상기 더미 패턴들, 상기 x 축 트레이스들, 및 상기 y 축 트레이스들은, ITO 또는 PEDOT와 같은 동일한 물질로 구성될 수 있다.In order to achieve the above object, the present invention provides a capacitive sensing assembly of a contact panel. The capacitive sensing assembly comprises a plurality of transparent x axis traces each having a plurality of connected x axis sensing units; And a plurality of transparent y-axis traces each having a plurality of connected y-axis sensing units, wherein the x-axis sensing units and the y-axis sensing units are arranged in a matrix in the operating area of the contact panel; Axis traces are alternately arranged with the x axis traces; And the gaps between the x-axis traces and the y-axis traces are arranged with dummy patterns. The dummy patterns, the x-axis traces, and the y-axis traces are arranged on the same plane. Alternatively, the dummy patterns and the x axis traces are arranged on the same plane. Alternatively, the dummy patterns and the y axis traces are arranged on the same plane. Alternatively, the dummy patterns and the x-axis traces and / or the y-axis traces are arranged on different planes. The dummy patterns, the x-axis traces and the y-axis traces do not connect with each other and maintain predetermined gaps. Preferably, the gap is about 50

to be. The x-axis traces and the y-axis traces are composed of the same transparent conductive thin film. Advantageously, said dummy patterns, said x-axis traces, and said y-axis traces may be composed of the same material, such as ITO or PEDOT.

The present invention also provides a capacitive sensing assembly of a contact panel. The capacitive sensing assembly includes a lower substrate; Upper panel; An adhesive layer connected to the upper panel by one body; And a capacitive sensing layer provided to be connected to the adhesive layer and the upper panel, wherein in the operation region of the contact panel, the capacitive sensing layer is embedded with a plurality of alternating sensing units and dummy patterns. Gaps between the sensed units, wherein the dummy patterns are insulated with respect to the sensed units and have the same or nearly the same transmittance as the sensed units. Each of the sensing units may have a triangular shape.

Various objects and advantages of the present invention may be more readily understood from the following detailed description with reference to the accompanying drawings.

In the capacitive sensing assembly for the contact panel, dummy patterns are embedded between the capacitive sensing units. The dummy patterns and the capacitive sensing units have the same transmittance, so that the gaps of the sensing units are significantly reduced. Thus, the flatness of the capacitive sensing assembly is increased and the transmittance becomes more uniform within the screen surface. The distortion in the display under the contact panel is improved. In order to reduce the capacitance of the noise, the gap provided in the capacitive sensing unit is increased.

In order that those skilled in the art may further understand the present invention, the following detailed description is provided. However, these descriptions and the accompanying drawings are used only for understanding the objects, shapes, and characteristics of the present invention, and do not limit the technical spirit of the present invention, but are defined in the appended claims. It is not intended to limit the technical idea.

의 두께의 높은 광 투과의 폴리에스테르(polyester) 박막 물질으로 형성된 복수의 절연성 차폐 표면들을 가진다. 상기 차폐 표면들은 두 개의 인접한 y 축 감지 유니트(122a)를 통하여 점핑하는 x 축 트레이스(121)의 부분(121b)을 덮기에 충분하다. 점프 도전층(14)은 y 축을 따라서 배열된 복수의 도전성 배선들을 가지고 설치된다. 상기 도전성 배선은 15

이하의 배선 직경을 가지는 금속 도전성 물질로 구성된다. 각각의 전기 도전 라인의 양 단부들 각각에는 확장 전기 연결 부분(141)이 형성된다. 상기 전기 도전 라인은 절연층(13)의 절연 표면의 상부 표면에 설치되고, 상기 전기 도전 라인의 양 단부들에서 확장 전기 연결 부분들(141)은 상기 절연 표면의 외측에서 노출된다. 따라서, 캐패시티브 감지층(12), 절연층(13), 및 점프 도전층(14)은 어셈블링되고, 두 개의 인접한 y 축 감지 유니트(122a)를 통하여 점핑되는 x 축 트레이스(121)의 부분(121b)을 덮기 위하여, y 축 트레이스(122)의 두 개의 인접한 y 축 감지 유니트들(122a) 사이에 절연층(13)의 차폐 표면이 설치된다. 상기 전기 도전 라인의 양 단부들에서의 확장 전기 연결 부분들(141)은 y 축 트레이스(122)의 두 개의 인접한 y 축 감지 유니트들(122a)과 전기적으로 연결되고, 이에 따라 하나의 y 축 트레이스(122)의 y 축 감지 유니트들(122a)이 전기적으로 연결된다. 따라서, 캐패시티브 감지 구조가 형성된다. 반면, x 축 감지 유니트들(121a)과 y 축 감지 유니트들(122a)의 간극들에 더미 패턴들(129a)이 설치되고, 그 사이에 형성된 약 20

내지 50

의 간극들에 의하여 더미 패턴들(129a)은 x 축 감지 유니트들(121a)과 y 축 감지 유니트들(122a)과 접촉되지 않는다. 바람직하게는, 더미 패턴들(129a)의 물질은 x 축 감지 유니트들(121a) 및 y 축 감지 유니트들(122a)의물질과 동일하고, 즉 ITO 투명 도전성 박막이고, 이에 따라 캐패시티브 감지층(12)은 균일한 광 투과율을 가진다.1 to 3, a preferred embodiment of the present invention is shown. The contact panel capacitive sensing assembly of the present invention comprises a lower substrate 1 and an upper panel 2 joined by an adhesive layer 3. The capacitive sensing layer 12 is adhered to the lower substrate 1 or the upper panel 2. The lower substrate 1 and the upper panel 2 are constituted by a thin glass plate of high light transmission and insulation. The adhesive layer 3 is a transparent UV glue. In order to shield the metal conductive lines 15a and 15b at the edges of the lower substrate 1, a color mask 21 formed by metal sputtering is provided around the upper panel 2. A capacitive sensing layer 12, an insulating layer 13, and a jump conductive layer 14 are provided on the upper surface of the lower substrate 1. The capacitive sensing layer 12 is an ITO transparent conductive thin film. The capacitive sensing layer 12 comprises a plurality of x-axis traces 121 arranged equally spaced and parallel along the x axis, and a plurality of y-axis traces arranged equally spaced and parallel along the y axis ( 122). The x axis trace 121 and the y axis trace 122 intersect as a metric of the checkerboard. The x-axis sensing units 121a of the x-axis trace 121 are connected to each other, and the y-axis sensing units 122a of the y-axis trace 122 are insulated from each other. One end of each of the x-axis trace 121 and the y-axis trace 122 is electrically connected to the metal conductive lines 15a and 15b at the edge of the lower substrate 1, and is connected to a signal output terminal (not shown). Connected. Accordingly, sense signals from the x-axis trace 121 and y-axis trace 122 of the capacitive sense layer 12 are transmitted to subsequent signal processing circuits via the signal output terminal. The insulating layer 13 has a dielectric constant of 3 and 1.5

It has a plurality of insulating shielding surfaces formed of a high light-transmitting polyester thin film material of a thickness of. The shielding surfaces are sufficient to cover the portion 121b of the x-axis trace 121 that jumps through two adjacent y-axis sensing units 122a. The jump conductive layer 14 is provided with a plurality of conductive wires arranged along the y axis. The conductive wiring is 15

It consists of a metal conductive material which has the following wiring diameters. At each of the two ends of each electrically conductive line is formed an electrical extension portion 141. The electrically conductive line is installed on the upper surface of the insulating surface of the insulating layer 13, and the extended electrical connecting portions 141 are exposed at the outer ends of the insulating surface at both ends of the electrically conductive line. Thus, the capacitive sensing layer 12, the insulating layer 13, and the jump conductive layer 14 are assembled and the x-axis trace 121 jumped through two adjacent y-axis sensing units 122a. In order to cover the portion 121b, a shielding surface of the insulating layer 13 is provided between two adjacent y-axis sensing units 122a of the y-axis trace 122. Extended electrical connection portions 141 at both ends of the electrically conductive line are electrically connected to two adjacent y-axis sensing units 122a of the y-axis trace 122, thus one y-axis trace. The y-axis sensing units 122a of 122 are electrically connected. Thus, a capacitive sensing structure is formed. On the other hand, dummy patterns 129a are provided in the gaps between the x-axis sensing units 121a and the y-axis sensing units 122a, and about 20 formed therebetween.

To 50

The dummy patterns 129a are not in contact with the x-axis sensing units 121a and the y-axis sensing units 122a due to the gaps of the gaps. Preferably, the material of the dummy patterns 129a is the same as that of the x-axis sensing units 121a and the y-axis sensing units 122a, that is, an ITO transparent conductive thin film, and thus the capacitive sensing layer 12 has a uniform light transmittance.

From the above-described structure, an equivalent circuit is formed between the x-axis trace 121 and the metal conductive line 15a, and an equivalent circuit is formed between the y-axis trace 122 and the metal conductive line 15b. When a finger or conductor contacts or slides through the surface of the contact panel, the signal processing circuit can determine the contact position by a change in capacitance. In addition, the contact panel of the present invention is a high transparent panel. Therefore, the electronic device may be arranged on the front surface of the screen of the electronic device, and thus the user may contact a desired position on the screen for operation.

In the capacitor sensing structure described above, the x-axis trace 121 and the y-axis trace 122 are arranged on the same surface, ie on the same capacitive sensing layer 12. Thus, each of the x-axis trace 121 and the y-axis trace 122 can be accurately arranged without error. By the dummy patterns 129, the hollow space in the capacitive sensing layer 12 is significantly reduced, thereby increasing the flatness and light transmission uniformity of the contour of the contact panel to improve the defect of distortion. Can be. By installing the dummy pattern 129, the gaps of the x-axis sensing units 121a and the y-axis sensing units 122a increase under the condition that the hollow space of the capacitive sensing layer 12 does not increase. As a result, the noise level is reduced. In addition, as shown above, the dummy patterns 129, the x-axis sensing units 121a, and the y-axis sensing units 122a are made of the same material, and the capacitive sensing layer 12 is also formed. Is formed in the same plane, and thus by etching the capacitive sensing layer 12, the structure is formed simultaneously without additional work or cost.

내지 50

범위이다. 바람직하게는, 더미 패턴들(129)의 물질은 감지 유니트들(42a)과 동일하고, 즉 ITO 투명 도전성 박막이고, 이에 따라 캐패시티브 감지층(42)은 균일한 광 투과율을 가지며, 이에 따라 왜곡의 결함없이 상기 접촉 패널의 외형의 전체적인 평탄도와 투과 균일성을 증가시킬 수 있다.4 and 5, a second embodiment of the present invention is shown. The capacitor sensing structure of the contact panel is the same as that of the first embodiment, that is, it includes a lower substrate 4 and an upper panel 5. The capacitive sensing layer 42 is provided therebetween. The adhesive layer 6 is used to join the lower substrate 4 and the upper panel 5. The difference from the first embodiment is the installation of the capacitive sensing layer 42. The capacitive sensing layer 42 is provided on the upper surface of the adhesive layer 4. The capacitive sensing layer 42 is composed of an ITO transparent conductive thin film. The capacitive sensing layer 42 includes a plurality of triangular sensing units 42a. The sensing units 42a are equally spaced and alternately arranged (shown in FIG. 4). Then, one end of each sensing unit 42a is electrically connected to the metal conductive line 42b at the edge of the adhesive layer 4 and to the signal output terminal (not shown). Thus, the sense signal from each sense unit 42a is transmitted to the subsequent signal processing circuit via the signal output terminal. On the other hand, dummy patterns 49 are embedded between the sensing units 42a, and the dummy patterns 49 are not connected to two adjacent sensing units 42a and maintain a predetermined interval. Generally, the gap 49a is 20

To 50

Range. Preferably, the material of the dummy patterns 129 is the same as the sensing units 42a, i.e., an ITO transparent conductive thin film, so that the capacitive sensing layer 42 has a uniform light transmittance and thus It is possible to increase the overall flatness and transmission uniformity of the appearance of the contact panel without distortion of the distortion.

However, in addition to the above-described features, there are other variations within the scope of the inventive concept, for example, the x-axis traces and the y-axis sensing units are installed in two different capacitive sensing layers, The insulating layer also functions to separate the two capacitive sense layers so that the dummy patterns are selectively arranged around the x-axis traces or the y-axis traces. Or, for example, the dummy patterns are arranged on the gaps of the insulating layer corresponding to the gaps of the x-axis sensing units and the y-axis sensing units. All such modifications are within the scope of the technical idea of the present invention.

It will be apparent that the present invention described above may be changed in various ways. Such variations are not to be regarded as a departure from the spirit of the present invention, and as will be apparent to those skilled in the art, all modifications are intended to be included within the scope of the following claims.

1 is a plan view of an adhesive layer according to a first embodiment of the present invention.

FIG. 2 is a schematic enlarged view of portion A of FIG. 1.

3 is a side sectional view showing the structure of the first embodiment.

4 is a plan view of an adhesive layer according to a first embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a structure along the line C-C in FIG. 4.

Explanation of symbols on the main parts of the drawings

1, 4: lower substrate; 2, 5: top panel;

3, 6: adhesive layer; 12, 42: capacitive sensing layer

13: insulating layer; 14: jump conductive layer

15a, 15b: conductive line; 21: Hue Mask

42a: sensing unit; 49, 129: dummy pattern

121: x axis trace; 121a: x-axis detection unit

121b: Part of the x-axis trace

122: y axis trace; 122a: y-axis detection unit

141: electrical connection

Claims (10)

A plurality of transparent x axis traces each having a plurality of connected x axis sensing units; And A plurality of transparent y axis traces each having a plurality of connected y axis sensing units; Including, The y-axis traces are arranged alternately with the x-axis traces so that the x-axis sensing units and the y-axis sensing units are arranged in a matrix in the operating area of the contact panel; And Capacitive sensing assembly of the contact panel wherein the gaps between the x-axis traces and the y-axis traces are arranged with dummy patterns. The method of claim 1, The dummy patterns, the x-axis traces, and the y-axis traces are arranged on the same plane. The method of claim 1, And the dummy patterns and the x-axis traces are arranged on the same plane. The method of claim 1, And the dummy patterns and the y-axis traces are arranged on the same plane. The method of claim 1, Said dummy patterns, and said x-axis traces and / or said y-axis traces are arranged on different planes. The method of claim 1, And the dummy patterns, the x-axis traces, and the y-axis traces maintain predetermined gaps without being connected to each other. The method of claim 6, The gap is 50

Capacitive sensing assembly of a contact panel. The method of claim 1, And the x-axis traces and the y-axis traces are configured of the same transparent conductive thin film. Lower substrate; Upper panel; An adhesive layer connected to the upper panel by one body; And A capacitive sensing layer provided to be connected to the adhesive layer and the upper panel; Including, In the operating region of the contact panel, the capacitive sensing layer includes a plurality of alternating sensing units and gaps between the sensing units embedded in dummy patterns, And wherein the dummy patterns are insulated with respect to the sensing units and have a transmission that is the same or nearly the same as the sensing units. The method of claim 1, And each of the sensing units has a triangular shape.

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