TWM486814U - Capacitive touch panel - Google Patents

Description

Capacitive touch panel

The present invention relates to a touch panel structure, and more particularly to a touch panel structure that improves antistatic capability.

In recent years, the use of touch screens has grown rapidly with the popularity of smart phones and the demand of the consumer for touch screens. In addition to smart phones, touch screens are also used on tablets, cameras and even desktop screens.

Please refer to the first figure, which is a top view of a conventional touch panel structure. In the touch panel structure shown in the first figure, the sensing units 110X and 110Y of the sensing unit array 110 are separated by a certain distance D. Due to limitations in the sensing structure process, and in order to avoid electrical interference between the sensing units electrically connected to different directions, the design of the sensing unit is prevented from being too close. Therefore, the size of the spacing D is certain. limit. However, the presence of the spacing D makes it possible for the user to clearly see the sensing unit array (shown in the first figure) 110 in the panel through the screen when using the touch screen, which seriously affects the user's perception.

In order to reduce the visibility of the touch panel sensing structure, so as to prevent the user from seeing the sensing unit array under the substrate through the screen, a design of vacant sensing unit is provided between the sensing units. Please refer to the second figure, which is a top view of another conventional touch panel structure. As shown in the second figure, between the adjacent sensing units 210X and 210Y, there are individual settings. A dummy pattern 215 is provided to reduce the spacing between the sensing units 210X, 210Y to D', which reduces the visibility of the sensing unit array 210.

When the sensing unit array (or conductive layer) of the second figure is further disposed on the shielding layer (for example, a shielding frame layer), an electrostatic discharge phenomenon is easily generated between the shielding layer and the conductive layer, resulting in damage of the conductive layer. Specifically, please refer to FIG. 3A, which is a schematic top view of the touch panel structure further combined with the shielding layer. As shown in FIG. 3A, a mask frame layer 31 is disposed on the touch panel structure shown in FIG. 3 to form a frame 310 to shield the surrounding portion of the touch panel structure, and is defined by the frame 310. One visual zone 300 is provided.

Please refer to the third B and the third C, which are respectively a partially enlarged perspective view and an enlarged cross-sectional view of the area 32 in the third A, for illustrating the sensing unit and the shielding of the touch panel structure at the frame thereof. The configuration of the border layer. As shown in FIG. 3B and FIG. 3C, when the sensing unit 220 composed of indium tin oxide is simultaneously spanned over the visible area 300 of the substrate 30 and the shadow frame layer 31 forming the bezel 310, the visible area 300 The height difference between the masking layer 31 and the masking layer 31 will affect the etching rate of the indium tin oxide when the indium tin oxide sensing unit is formed, so that the indium tin oxide sensing unit 220 is on the substrate 30 and on the shielding frame layer 31. There are different etch rates; therefore, the film thickness of the indium tin oxide sensing unit 220 is not uniform at this junction, and is liable to cause residue (as shown by the area A in the third C diagram). In the case where indium tin oxide is left in the residual state, when the touch panel receives a high voltage, it is easy to generate an electrostatic discharge phenomenon at the junction, resulting in damage of the touch panel component.

In view of the foregoing reasons, there is a need for a touch panel structure design to enhance its antistatic capability. Under the long-term thinking and research of the applicant, the touch panel structure of the present invention is proposed, which has improved antistatic capability. In addition, the touch panel structure of this creation is more due to its The structure is not complicated, can be achieved by a low-cost manufacturing method, and a relatively simple design is realized.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a capacitive touch panel structure, which further improves the antistatic capability of the touch panel structure without affecting the visibility of the sensing structure.

An idea of the present invention is to provide a capacitive touch panel having improved antistatic capability, comprising: a substrate; a shielding layer shielding a portion of the substrate, wherein the shielding layer is disposed in a first region, and The undisposed area of the shielding layer is a second area; and a conductive layer includes a plurality of first sensing units and a plurality of first vacant sensing units located in the first area, and located in the second area a plurality of second sensing units and a plurality of second vacant sensing units; wherein a first gap between the adjacent first sensing unit and the plurality of first vacant sensing units is greater than the adjacent one a second gap between the second sensing unit and the plurality of second vacant sensing units.

Based on the foregoing concept, the first gap is greater than or equal to 1.5 times the second gap.

Based on the foregoing concept, the first gap is greater than or equal to twice the second gap.

Based on the foregoing concept, the substrate is glass, and the shielding layer is made of black photoresist or ink.

Another idea of the present invention is to provide a capacitive touch panel comprising: a substrate; a shielding layer shielding a portion of the substrate, wherein the shielding layer is disposed in a first region, and the shielding layer is not disposed The area is a second area; and a conductive layer, including a plurality of first sensing units and a plurality of first vacant sensing units located in the first area, and a plurality of second sensing units and a plurality of second vacant sensing units located in the second area; a first gap is formed between the second sensing unit and the second vacant sensing unit; and the first vacant sensing unit and the second vacant sensing unit are located in the first area and the second area One of the junction areas.

According to the foregoing concept, the boundary region is spaced apart from the boundary between the first region and the second region; the interval is greater than the first gap.

According to the foregoing concept, the spacing is greater than or equal to 1.5 times the second gap; preferably, greater than or equal to 2 times the second gap.

According to the foregoing concept, wherein the substrate is glass, the shielding layer is made of a black photoresist or an ink material.

Another idea of the present invention is to provide a capacitive touch panel comprising: a substrate; a shielding layer shielding a portion of the substrate, wherein the shielding layer is disposed in a first region, and the shielding layer is not disposed The area is a second area; and a conductive layer includes a plurality of first sensing units and a plurality of first vacant sensing units located in the first area, and a plurality of seconds located in the second area a sensing unit and a plurality of second vacant sensing units; wherein a first gap between the adjacent first sensing unit and the plurality of first vacant sensing units is greater than the adjacent second sensing unit a second gap between the plurality of second vacant sensing units; wherein the conductive layer is configured such that the first and second vacant sensing units are located at a boundary region between the first region and the second region outer.

Based on the foregoing concept, the interface region is spaced apart from the interface between the first region and the second region; the interval is greater than the second gap.

Based on the foregoing concept, the spacing is greater than or equal to 1.5 times the second gap; the first gap is greater than or equal to 1.5 times the second gap.

Based on the foregoing concept, the spacing is greater than or equal to twice the second gap; the first gap is greater than or equal to twice the second gap.

The foregoing aspects and other aspects of the present invention will be apparent from the following detailed description of the accompanying drawings.

110‧‧‧Sensor unit array

110X‧‧‧Sensor unit

110Y‧‧‧Sensor unit

210‧‧‧Sensor unit

210X‧‧‧Sensor unit

210Y‧‧‧Sensor unit

215‧‧‧ Vacant Sensing Unit

220‧‧‧Sensor unit

220X‧‧‧Sensor unit

220Y‧‧‧Sensor unit

225‧‧‧vacant sensing unit

30‧‧‧Substrate

300‧‧‧visible area

31‧‧‧Shaded frame layer

32‧‧‧Parts of the third A map

310‧‧‧Border

4‧‧‧Capacitive touch panel

40‧‧‧Shielding layer

41‧‧‧First gap

42‧‧‧Second gap

43‧‧‧discharge path

44‧‧‧ paragraph difference

45‧‧‧ junction area

46‧‧‧Parts of Figure 5B

400‧‧‧Substrate

410‧‧‧First area

420‧‧‧Second area

430‧‧‧ Conductive layer

VB‧‧‧ breakdown voltage

F‧‧‧ breakdown electric field

A‧‧‧ area

The first figure is a top view of a conventional touch panel structure.

The second figure is a top view of another conventional touch panel structure.

The third A is a top view of a conventional touch panel structure in combination with a shielding layer.

The third B diagram is a partially enlarged perspective view of the third A diagram.

The third C diagram is a partially enlarged cross-sectional view of the third A diagram.

The fourth A is a schematic cross-sectional view of a touch panel structure according to a specific embodiment of the present invention.

The fourth B is a top view of the touch panel structure according to a specific embodiment of the present invention.

The fifth A is a schematic cross-sectional view of a touch panel structure according to a specific embodiment of the present invention.

The fifth B is a top view of the touch panel structure according to a specific embodiment of the present invention.

The fifth C picture is a partial enlarged view of the fifth B picture

In order to understand the technical characteristics, content and advantages of the creation and the effects that can be achieved, the author will use the creation of the drawings in detail with reference to the drawings, and the drawings used therein, The subject matter is only for the purpose of illustration and supplementary instructions. It is not necessarily the true proportion and precise configuration after the implementation of the original creation. Therefore, the proportions and configuration relationships of the attached drawings should not be interpreted or limited in the actual implementation scope. First described.

The following is a description of the specific implementation of the creation; it should be understood that the components indicated in these drawings are for clarity of description, which does not represent the actual size and proportion, and is simple for the drawing. In order to facilitate understanding, the drawing of conventional components is also omitted in some drawings.

Please refer to FIG. 4A for a schematic cross-sectional view of a capacitive touch panel according to an embodiment of the present invention for explaining various specific embodiments of the present invention. The capacitive touch panel 4 of the present embodiment mainly includes a substrate 400, a shielding layer 40 shielding a part of the substrate 400 (for example, a peripheral area), and defining a first area 410 (for example, a peripheral area) and One of the second regions 420 is not obscured by the obscuring layer 40. The capacitive touch panel 4 also includes a conductive layer 430 on the substrate 400 and the shielding layer 40. The conductive layer 430 is composed of a plurality of sensing units 210 and 220 and vacant sensing units 215 and 225. The two-dimensional sensing structure. In the first area 410, a first gap 41 is separated between the sensing unit 210X and the vacant sensing unit 215, or between the vacant sensing unit 215 and the sensing unit 210Y; In 420, a second gap 42 is separated between the sensing unit 220X and the vacant sensing unit 225 or between the vacant sensing unit 225 and the sensing unit 220Y. It should be specially noted that the fourth A picture is only a schematic diagram, the sensing The size ratio of the units 210, 220 to the vacant sensing units 215, 225 is not limited thereto. The plurality of sensing units 210, 220 and the at least one vacant sensing unit 215, 225 are generally formed of a transparent conductive material, including but not limited to: indium tin oxide (ITO), indium zinc oxide (IZP), and oxidation. Zinc aluminum (AZO) and the like. Referring to FIG. 4B, a top view of the present embodiment is shown. In the present embodiment, the conductive layer 430 is configured by the plurality of sensing units 210X, 210Y disposed in the first region 410, and at least one of the vacant layers. The sensing unit 215 is configured by the plurality of sensing units 220X and 220Y disposed in the second region 420 and at least one of the vacant sensing units 225. The pattern of the conductive layer 430 is not limited to this figure, as long as it conforms to the present invention. The spirit of the authoring embodiments is within the scope of the present creative embodiment.

Specifically, according to a preferred embodiment of the present invention, the substrate 400 is a glass substrate, and the material of the shielding layer 40 is carbon or a material having more carbon chain components, such as black photoresist or ink. Wait, but not limited to this. Since the dielectric constant of the shielding layer 40 is higher than the dielectric constant of the glass, the breakdown voltage between the sensing unit disposed on the shielding layer 40 and the vacant sensing unit will be disposed on the glass substrate. The breakdown voltage between the sensing unit and the vacant sensing unit is small, in other words, under the same spacing, the sensing unit and the vacant sensing unit are more above the shielding layer 40 than above the glass substrate. It is easy to produce an electrostatic discharge effect. In the present embodiment, the first gap 41 of the capacitive touch panel 4 is greater than the second gap 42. In an embodiment, the first gap 41 is greater than or equal to 1.5 times the second gap 42. Preferably, the first gap is greater than or equal to twice the second gap, but is not limited thereto. In a specific embodiment of the present invention, the first gap 41 is enlarged, so that electrostatic discharge is not easily generated between the vacant sensing unit and the sensing unit of the first region to prevent the sensing unit from being damaged by the electrostatic discharge discharge. In addition, in the above embodiment, the first gap 41 is located in the shaded layer. In the first region 410, even if the first gap 41 is increased, the problem of visibility is not affected.

Figure 5A schematically illustrates another embodiment of the present work. As shown in FIG. 5A, a schematic cross-sectional view of another embodiment of the present invention is schematically illustrated. In the capacitive touch panel 4 of the present embodiment, due to the presence of the shielding layer 40, A difference 44 (i.e., the thickness of the masking layer) is created at the interface region 45 of the first region 410 and the second region 420 of the panel. In an embodiment of the present invention, the vacant sensing units 215 and 225 are disposed outside the boundary region 45, that is, retracted to the boundary region 45, in order to avoid the residual discharge effect of the conductive layer 430. In addition, the residual of the vacant sensing unit 215 is avoided due to the incomplete etching caused by the step 44, thereby enhancing the antistatic capability of the panel.

It should be noted that the required range of the interface area 45 is adjusted according to the capacitive touch panel design. In the present embodiment, the interface region 45 of the capacitive touch panel 4 is larger than the second gap 42. In an embodiment, the interface region 45 is defined to be greater than or equal to 1.5 times the second gap 42. In another embodiment, the interface region 45 is greater than or equal to twice the second gap 42. Therefore, in the present embodiment, the vacant sensing units 215, 225 in the first region 410 and the second region 420 are disposed in regions other than the boundary region 45 of the first region 410 and the second region 420. . As can be seen from the foregoing, in the capacitive touch panel of the present embodiment, the vacant sensing unit is disposed outside the boundary region 45, so that the vacant sensing unit will not be left behind due to the step difference of the shielding layer, and is not easy to generate. The electrostatic discharge effect improves the antistatic capability of the capacitive touch panel.

Referring to FIG. 5B, a top view of the present embodiment is used to more clearly illustrate a schematic diagram of the conductive layer in the boundary region in the present embodiment, wherein the conductive layer 430 is disposed in the first region 410. The plurality of sensing units 210X, 210Y, at least one of the sense of vacancy The measuring unit 215 and the plurality of sensing units 220X and 220Y disposed in the second region 420, and at least one of the vacant sensing units 225, wherein the tip discharge effect is prevented in order to avoid the residual of the conductive layer 430, and the configuration is to be configured. The vacant sensing unit 215 in the first region 410 and the vacant sensing unit 225 disposed in the second region 420 are retracted to the outside of the boundary between the first region 410 and the second region 420 of the panel.

For a clearer understanding of the construction of the conductive layer of the present creative embodiment at the interface, please refer to the fifth C diagram. The fifth C diagram is an enlarged view of a portion 46 of the fifth B diagram. The vacant sensing unit 215 disposed in the first region 410 and the vacant sensing unit 225 disposed in the second region 420 are retracted at a boundary between the first region 410 and the second region 420, and formed. In the pattern of the vacant sensing unit 215 of the first region 410 and the vacant sensing unit 225 of the second region 420 not contacting each other, the residual vacant sensing unit is prevented from causing a tip discharge effect.

Please refer to FIG. 5A, which is a partial side view of the capacitive touch panel 4 of another embodiment of the present invention. In the present embodiment, the first gap 41 disposed in the first region 410 is greater than the second gap 42 disposed in the second region 420, and in the first region 410 and the second region 420. The vacant sensing units 215 and 225 are disposed in the region other than the interface region 45 of the first region 410 and the second region 420. Therefore, not only the vacant sensing unit 215 and the sensing unit 210X, 210Y of the first region 410 The electrostatic discharge is not easily generated, and the sensing unit is prevented from being damaged by the electrostatic discharge discharge. At the same time, the residual of the vacant sensing unit 215 is prevented from being incomplete due to the step 44, and the antistatic capability of the panel is enhanced. In another embodiment, the interface region 45 is greater than the second gap 42. In another embodiment, the first gap 41 of the capacitive touch panel 4 disposed in the first region 410 is greater than or equal to 1.5 times the second gap 42 disposed in the second region 420, and The boundary region 45 is greater than or equal to 1.5 times the second gap 42. Preferably, the first gap 41 of the capacitive touch panel 4 disposed in the first region 410 is greater than or equal to twice the second gap 42 disposed in the second region 420, and the interface region 45 is Greater than or equal to 2 times the second gap 42.

In summary, the capacitive touch panel proposed by the present invention has the capability of improving antistatic property, and can reduce the production loss caused by static electricity, thereby further increasing the yield of production.

So far, the preferred embodiment of the touch panel structure of the present invention has been fully explained by the above description and the drawings. All of the features disclosed in this specification are likely to be combined with other features, and each of the features disclosed in this specification may be selectively replaced with the same, equal or similar purpose features, and thus, in addition to the particularly salient features All of the features disclosed in this specification are only one example of equal or similar features. After the description of the preferred embodiment of the present invention, those skilled in the art should be able to understand that the creation is a novel, progressive and industrially practical creation, which has great development value. This creation has been modified by the people who are familiar with the craftsmanship, but it does not deviate from the scope of the application.

210‧‧‧Sensor unit

210X‧‧‧Sensor unit

210Y‧‧‧Sensor unit

215‧‧‧ Vacant Sensing Unit

220‧‧‧Sensor unit

220X‧‧‧Sensor unit

220Y‧‧‧Sensor unit

225‧‧‧vacant sensing unit

4‧‧‧Capacitive touch panel

40‧‧‧Shielding layer

41‧‧‧First gap

42‧‧‧Second gap

400‧‧‧Substrate

410‧‧‧First area

420‧‧‧Second area

430‧‧‧ Conductive layer

Claims (13)

A capacitive touch panel includes: a substrate; a shielding layer shielding a portion of the substrate, wherein a region where the shielding layer is disposed is a first region, and a region where the shielding layer is not disposed is a second region; a conductive layer includes a first sensing unit and a first vacant sensing unit in the first region, and a second sensing unit and a second vacant sensing unit in the second region; The first gap between the first sensing unit and the first vacant sensing unit is greater than a second gap between the second sensing unit and the second vacant sensing unit. The capacitive touch panel of claim 1, wherein the first gap is greater than or equal to 1.5 times the second gap. The capacitive touch panel of claim 1, wherein the first gap is greater than or equal to twice the second gap. The capacitive touch panel of claim 1, wherein the substrate is glass, and the shielding layer is made of black photoresist or ink. A capacitive touch panel includes: a substrate; a shielding layer shielding a portion of the substrate, wherein a region where the shielding layer is disposed is a first region, and a region where the shielding layer is not disposed is a second region; a conductive layer, including a first sensing unit and a first region a first vacant sensing unit, and a second sensing unit and a second vacant sensing unit in the second area; wherein the second sensing unit and the second vacant sensing unit are a first gap; and the first vacant sensing unit and the second vacant sensing unit are located outside a boundary region of the first region and the second region. The capacitive touch panel of claim 5, wherein the interface region is spaced apart from the interface between the first region and the second region; the spacing is greater than the first gap. The capacitive touch panel of claim 5, wherein the spacing is greater than or equal to 1.5 times the first gap. The capacitive touch panel of claim 5, wherein the spacing is greater than or equal to twice the first gap. The capacitive touch panel of claim 5, wherein the substrate is glass, and the shielding layer is made of black photoresist or ink. A capacitive touch panel includes: a substrate; a shielding layer shielding a portion of the substrate, wherein a region where the shielding layer is disposed is a first region, and a region where the shielding layer is not disposed is a second region; a conductive layer includes a first sensing unit and a first vacant sensing unit in the first region, and a second sensing unit and a second vacant sensing unit in the second region; a first gap between the first sensing unit and the first vacant sensing unit is greater than between the second sensing unit and the second vacant sensing unit a second gap; wherein the conductive layer is disposed such that the first and second vacant sensing units are located outside the boundary region of the first region and the second region. The capacitive touch panel of claim 10, wherein the interface region is spaced apart from the interface between the first region and the second region; the spacing is greater than the second gap. The capacitive touch panel of claim 10, wherein the spacing is greater than or equal to 1.5 times the second gap; the first gap is greater than or equal to 1.5 times the second gap. The capacitive touch panel of claim 10, wherein the spacing is greater than or equal to twice the second gap; the first gap is greater than or equal to twice the second gap.