TWI467441B - Touch panel and touch display panel - Google Patents

Description

Touch panel and touch display panel

The invention relates to a touch panel and a touch display panel.

In recent years, various electronic products have been moving toward simple operation, small size, and large screen size. In particular, portable electronic products have stricter requirements on volume and screen size. Therefore, many electronic products integrate the touch panel with the liquid crystal display panel to omit the space required for the keyboard or the control buttons, thereby expanding the configurable area of the screen.

Currently, touch panels can be roughly classified into resistive, capacitive, infrared, and ultrasonic touch panels. Among them, resistive touch panels and capacitive touch panels are the most common products. In the case of a capacitive touch panel, the multi-touch feature provides a more user-friendly operation mode, and the capacitive touch panel is favored by the market.

In general, a capacitive touch panel detects a touch position of a finger or a conductive object by a change in a capacitance value caused by a user touching a capacitive touch panel through a finger or a conductive object. Further, the capacitive touch panel generally has a first conductive layer and a second conductive layer electrically insulated from each other, wherein the first conductive layer and the second conductive layer are electrically connected, for example, by disposing an insulating layer. The effect of sexual insulation. The capacitor has an initial value between the first conductive layer and the second conductive layer when the user does not touch the touch panel. When the user touches the touch panel, the touched position will change the capacitance value, thus changing the original capacitance initial value. At this time, it can be judged by Do not change the position of the capacitance value to determine the position touched by the user.

The first conductive layer and the second conductive layer generally have a plurality of sensing patterns electrically insulated from each other, and a gap region having no sensing pattern exists between the sensing patterns. Since the refractive index of the sensing pattern area and the gap area are different, the light emitted by the display panel may have different deflection angles after passing through the touch panel, and the user may view the edge of the sensing pattern in the touch panel and the sensing. The shape of the pattern. In this way, the image overlay of the display screen and the sensing pattern of the touch panel causes visual interference and reduces the display quality of the touch display panel to which the touch panel is applied.

The present invention provides a touch panel that can reduce the visual interference of the edge of the sensing pattern in the touch panel and the shape of the sensing pattern.

The invention provides a touch display panel with good display quality.

The invention provides a touch panel comprising a substrate, a first conductive layer, a second conductive layer, an insulating layer and a third conductive layer. The first conductive layer is disposed on the substrate and includes a plurality of first sensing patterns, a plurality of second sensing patterns, and a plurality of first bridge patterns connecting the first sensing patterns. The second conductive layer is disposed on the substrate and includes a plurality of second bridge patterns to electrically connect the second sensing patterns. The insulating layer covers the first conductive layer and the second conductive layer. The third conductive layer is on the insulating layer and completely covers the first conductive layer and the second conductive layer.

The present invention further provides a touch display panel, including a display panel and a touch panel. The touch panel is located on the display panel, wherein the touch panel comprises a substrate, a first conductive layer, a second conductive layer, an insulating layer and a third conductive layer. The first conductive layer is disposed on the substrate and includes a plurality of first sensing patterns, a plurality of second sensing patterns, and a plurality of first bridge patterns connecting the first sensing patterns. The second conductive layer is disposed on the substrate and includes a plurality of second bridge patterns to electrically connect the second sensing patterns. The insulating layer covers the first conductive layer and the second conductive layer. The third conductive layer is on the second insulating layer and completely covers the first conductive layer and the second conductive layer.

Based on the above, the present invention can utilize the arrangement of the third conductive layer, and the third conductive layer covers the first conductive layer and the second conductive layer, in particular, the gap region between the first sensing pattern and the second sensing pattern. The light has a uniform deflection angle after passing through the first conductive layer, the second conductive layer and the third conductive layer. In this way, the visual interference caused by the user to view the edge of the sensing pattern in the touch panel and the shape of the sensing pattern can be avoided, so that the touch display panel using the touch panel has good display quality.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a top plan view of a touch panel according to an embodiment of the present invention. Fig. 2A is a schematic cross-sectional view taken along line A-A' of Fig. 1, and Fig. 2B is a cross-sectional view taken along line B-B' of Fig. 1.

Referring to FIG. 1 , FIG. 2A and FIG. 2B , the touch panel 100 of the present embodiment includes a substrate 110 , a first conductive layer 120 , a second conductive layer 130 , a first insulating layer 140 , a second insulating layer 150 , and a third layer . Conductive layer 160. The material of the substrate 110 is, for example, a transparent material. Transparent material can be glass or stone English, organic polymers, plastics or other suitable materials. Here, a transparent material generally refers to a material that generally has a high transmittance, and is not used to define a material having a transmittance of 100%.

The first conductive layer 120 is disposed on the substrate 110 and includes a plurality of first sensing patterns 122 , a plurality of second sensing patterns 124 , and a plurality of first bridge patterns 126 connecting the first sensing patterns 122 . Further, the plurality of first sensing patterns 122 are electrically insulated from each other, and the plurality of second sensing patterns 124 are also electrically insulated from each other. In addition, the second sensing patterns 124 and the first sensing patterns 122 are electrically insulated from each other and alternately arranged. In addition, the plurality of first sensing patterns 122 and the plurality of first bridge patterns 126 form a plurality of first sensing strings L1, wherein the first bridge patterns 126 connect the adjacent two first sensing patterns 122 to make the first sensing series L1 extends along the first direction X and is arranged along the second direction Y, the first direction X being exemplified perpendicular to the second direction Y.

In this embodiment, the material of the first conductive layer 120 is preferably a transparent conductive material. The transparent conductive material is, for example, a metal oxide such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium antimony zinc oxide, or other suitable oxide, or at least two of the above Stack layers. In addition, the patterns of the first sensing pattern 122 and the second sensing pattern 124 of the present embodiment are illustrated by a diamond shape, but the invention is not limited thereto. In other embodiments, the graphics of the first sensing pattern 122 and the second sensing pattern 124 may also depend on product requirements.

The second conductive layer 130 is disposed on the substrate 110 and includes a plurality of second bridge patterns 132 to electrically connect the second sensing patterns 124 . The plurality of second sensing patterns 124 and the plurality of second bridge patterns 132 form a plurality of second sensing series L2, wherein the second bridge pattern 132 connects the adjacent two second sensing patterns 124 such that the second sensing series L2 extends in the second direction Y and is arranged along the first direction X.

In this embodiment, the material of the second conductive layer 130 is preferably a transparent conductive material. The transparent conductive material is, for example, the aforementioned material, and will not be described herein. However, the present invention does not need to define the material of the second bridging pattern 132. In other embodiments, the material of the second bridging pattern 132 may also be a conductive metal or metal lamination.

It should be noted that, in this embodiment, the first conductive layer 120 is adjacent to the substrate 110 opposite to the second conductive layer 130 (in the process, the first conductive layer 120 is formed on the substrate 110 than the second conductive layer 130). By way of example, the invention is not limited thereto. In other embodiments, the second conductive layer 130 may also be adjacent to the substrate 110 relative to the first conductive layer 120 (in the process, the second conductive layer 130 is formed on the substrate 110 before the first conductive layer 120).

The first insulating layer 140 is located between the first conductive layer 120 and the second conductive layer 130. In the present embodiment, the first insulating layer 140 is located between the first bridge pattern 126 and the second bridge pattern 132 to electrically insulate the first bridge pattern 126 from the second bridge pattern 132. The material of the first insulating layer 140 is, for example, an inorganic material, an organic material, or a combination thereof, wherein the inorganic material is, for example, tantalum oxide, tantalum nitride, hafnium oxynitride, hafnium aluminum oxide or a stacked layer of at least two of the above materials. Of course, the present invention is not limited thereto, and any material that can provide insulating properties can be selectively applied to the present embodiment to fabricate the first insulating layer 140.

The second insulating layer 150 covers the first conductive layer 120 and the second conductive layer 130. In addition, the material of the second insulating layer 150 is, for example, an inorganic material, an organic material, or a combination thereof, wherein the inorganic material is, for example, tantalum oxide, tantalum nitride, lanthanum oxynitride, lanthanum aluminum oxide, or a stacked layer of at least two of the above materials. . Of course, the present invention is not limited thereto. Any material that can provide protection of the first conductive layer 120 and the second conductive layer 130 can be selectively applied to the embodiment to form the second insulating layer 150.

The third conductive layer 160 is located on the second insulating layer 150 and completely covers the first conductive layer 120 and the second conductive layer 130. In this embodiment, the material of the third conductive layer 160 is the same as the first conductive layer 120 and the second conductive layer 130, for example. In short, the material of the third conductive layer 160 is, for example, the aforementioned metal oxide. In other words, the refractive index of the third conductive layer 160 is, for example, substantially the same as the refractive index of the first conductive layer 120 or the second conductive layer 130. Further, the thickness H160 of the third conductive layer 160 is, for example, the same as the thicknesses H120, H130 of the first conductive layer 120 and the second conductive layer 130. For example, the thicknesses H120, H130, and H160 of the first conductive layer 120, the second conductive layer 130, and the third conductive layer 160 are, for example, 0.0266 to 0.12 micrometers.

The embodiment can be made by the modulation of the refractive index and/or the thickness of the third conductive layer 160 and by covering the third conductive layer 160 with the void region G between the first conductive layer 120 and the second conductive layer 130. The light has a uniform deflection angle after passing through the first conductive layer 120, the second conductive layer 130, and the third conductive layer 160. In this way, the user can avoid the edge of the sensing pattern (including the first sensing pattern 122, the second sensing pattern 124, the first bridge pattern 126, and the second bridge pattern 132) in the touch panel 100. And the visual interference caused by the shape of the sensing pattern.

In addition, the present embodiment can provide a shielding function by electrically connecting the third conductive layer 160 to a common voltage to reduce the interference of the external electric field on the touch panel 100. In this way, the accuracy of the touch detection of the touch panel 100 can be improved.

In addition, the touch panel 100 of the embodiment may further include a protective layer 170 covering the third conductive layer 160 . In this way, damage to the film layer by the external environment or other human factors can be reduced, thereby improving the reliability of the touch panel 100. The material of the protective layer 170 is, for example, an inorganic material, an organic material, or a combination thereof, wherein the inorganic material is, for example, tantalum oxide, tantalum nitride, hafnium oxynitride, hafnium aluminum oxide, or a stacked layer of at least two of the above materials. Of course, the present invention is not limited thereto, and any material that can provide protection can be selectively applied to the embodiment to form the protective layer 170.

It is worth mentioning that the above touch panel 100 is suitable for application to a touch display panel. 3 is a cross-sectional view of a touch display panel according to an embodiment of the present invention.

Referring to FIG. 1 , FIG. 2A , FIG. 2B and FIG. 3 , the touch display panel 200 of the present embodiment includes a display panel 210 and the touch panel 100 of the foregoing embodiment, wherein the touch panel 100 is located on the display panel 210 . In this embodiment, the display panel 210 can be a liquid crystal display panel, an organic electroluminescent display panel, an electrophoretic display panel, a plasma display panel, an electrowetting display panel, a field emission display panel, or other forms of display panels.

The touch display panel 200 of the touch panel 100 can inherit the functions of the touch panel 100 of the foregoing embodiment and has good display quality. Further, through the setting of the third conductive layer 160 of the touch panel 100, The light has a uniform deflection angle after passing through the touch panel 100. In this way, the user can avoid the edges of the sensing patterns (including the first sensing pattern 122, the second sensing pattern 124, the first bridge pattern 126, and the second bridge pattern 132) and the shape of the sensing pattern in the touch panel 100. The visual interference is caused, and the touch display panel 200 to which the touch panel 100 is applied has good display quality.

In addition, the touch panel 100 of the present embodiment is fixed to the display panel 210, for example, in a conforming manner. In other words, the touch display panel 200 can further include an adhesive material 220 between the protective layer 170 of the touch panel 100 and the display panel 210 . Of course, the present invention does not need to limit the integration of the touch panel 100 and the display panel 210, and the technique of further thinning the touch display panel by using the technology of integrating the touch panel and the display panel can also be applied to the present invention, such as an in-line type. (in-cell) architecture technology.

In summary, the third conductive layer covers the gap between the first sensing pattern and the second sensing pattern to make the light uniform after passing through the first conductive layer, the second conductive layer and the third conductive layer. Deflection angle. In this way, the visual interference caused by the user to view the edge of the sensing pattern in the touch panel and the shape of the sensing pattern can be avoided, so that the touch display panel using the touch panel has good display quality.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧ touch panel

110‧‧‧Substrate

120‧‧‧First conductive layer

122‧‧‧First sensing pattern

124‧‧‧Second sensing pattern

126‧‧‧ first bridge pattern

130‧‧‧Second conductive layer

132‧‧‧Second bridge pattern

140‧‧‧First insulation

150‧‧‧Second insulation

160‧‧‧ Third conductive layer

170‧‧‧Protective layer

200‧‧‧ touch display panel

210‧‧‧ display panel

220‧‧‧Adhesive materials

H120, H130, H160‧‧‧ thickness

G‧‧‧Gap area

L1‧‧‧first induction series

L2‧‧‧Second induction series

X‧‧‧ first direction

Y‧‧‧second direction

A-A’, B-B’‧‧‧ cut line

1 is a top plan view of a touch panel according to an embodiment of the present invention.

Fig. 2A is a schematic cross-sectional view taken along line A-A' of Fig. 1.

Fig. 2B is a schematic cross-sectional view taken along line B-B' of Fig. 1.

3 is a cross-sectional view of a touch display panel according to an embodiment of the present invention.

100‧‧‧ touch panel

110‧‧‧Substrate

120‧‧‧First conductive layer

122‧‧‧First sensing pattern

124‧‧‧Second sensing pattern

126‧‧‧ first bridge pattern

130‧‧‧Second conductive layer

132‧‧‧Second bridge pattern

140‧‧‧First insulation

150‧‧‧Second insulation

160‧‧‧ Third conductive layer

170‧‧‧Protective layer

L1‧‧‧first induction series

L2‧‧‧Second induction series

Claims (19)

A touch panel includes: a substrate; a first conductive layer disposed on the substrate and including a plurality of first sensing patterns, a plurality of second sensing patterns, and a plurality of first bridge patterns connecting the first sensing patterns a second conductive layer on the substrate and including a plurality of second bridge patterns to electrically connect the second sensing patterns; an insulating layer covering the first conductive layer and the second conductive layer; a conductive layer on the insulating layer and covering the first conductive layer and the second conductive layer in a comprehensive manner; and a protective layer covering the third conductive layer. The touch panel of claim 1, wherein the third conductive layer has a refractive index substantially the same as a refractive index of the first conductive layer or the second conductive layer. The touch panel of claim 1, wherein the first conductive layer, the second conductive layer, and the third conductive layer are made of the same material. The touch panel of claim 1, wherein the third conductive layer covers a void region between the first conductive layer and the second conductive layer. The touch panel of claim 1, wherein the first conductive layer, the second conductive layer, and the third conductive layer have the same thickness. The touch panel of claim 5, wherein the first conductive layer, the second conductive layer, and the third conductive layer have a thickness of 0.0266~0.12 microns. The touch panel of claim 1, wherein the third conductive layer is electrically connected to a common voltage. The touch panel of claim 1, wherein the material of the first conductive layer, the second conductive layer and the third conductive layer comprises a metal oxide. The touch panel of claim 1, further comprising another insulating layer between the first conductive layer and the second conductive layer. A touch display panel includes: a display panel; and a touch panel disposed on the display panel, wherein the touch panel includes: a substrate; a first conductive layer on the substrate and including a plurality of first a sensing pattern, a plurality of second sensing patterns, and a plurality of first bridging patterns connecting the first sensing patterns; a second conductive layer on the substrate including a plurality of second bridging patterns to electrically connect the plurality of a second sensing pattern; an insulating layer covering the first conductive layer and the second conductive layer; a third conductive layer on the insulating layer and covering the first conductive layer and the second conductive layer comprehensively; a protective layer covering the third conductive layer. The touch display panel of claim 10, wherein the third conductive layer has a refractive index substantially the same as a refractive index of the first conductive layer or the second conductive layer. The touch display panel of claim 10, wherein the first conductive layer, the second conductive layer, and the third conductive layer are made of the same material. The touch display panel of claim 10, wherein the third conductive layer of the touch panel covers a gap region between the first conductive layer and the second conductive layer. The touch display panel of claim 10, wherein the first conductive layer, the second conductive layer, and the third conductive layer of the touch panel have the same thickness. The touch display panel of claim 14, wherein the first conductive layer, the second conductive layer and the third conductive layer of the touch panel have a thickness of 0.0266 to 0.12 micrometers. The touch display panel of claim 10, wherein the third conductive layer of the touch panel is electrically connected to a common voltage. The touch display panel of claim 10, wherein the material of the first conductive layer, the second conductive layer and the third conductive layer of the touch panel comprises a metal oxide. The touch display panel of claim 10, wherein the touch panel further comprises a further insulating layer between the first conductive layer and the second conductive layer. The touch display panel of claim 10, further comprising an adhesive material between the protective layer and the display panel.