TWI480780B - Touch panel and touch display device using the same - Google Patents

Description

Touch panel and touch display panel using same

The present invention relates to a touch panel and a touch display panel using the same, and more particularly to a touch panel having a switch and a touch display panel using the same.

A conventional touch panel has a black frame which is provided to shield the edge line of the touch panel. However, the area of the black frame occupies a certain space of the touch panel, which reduces the area of the touch area. Therefore, how to effectively use the black border of the touch panel is one of the focuses of the industry.

The invention relates to a touch panel and a touch display panel using the same, which can improve the problem of low black frame utilization of the touch panel.

According to an embodiment of the invention, a touch panel is proposed. The touch panel includes a touch substrate, a cover and a switch. The touch substrate has a first surface and a second surface. The cover plate is disposed on the first surface of the touch substrate and includes a light transmissive plate and a light shielding layer. The light shielding layer is formed on the edge of the light transmissive plate and has a hollow pattern. The switch is disposed on the second surface of the touch substrate.

According to another embodiment of the present invention, a touch display panel is proposed. The touch display panel includes a touch panel and a display panel. The touch panel includes a touch substrate, a cover and a switch. The touch substrate has a first surface and a second surface. The cover is disposed on the first surface of the touch substrate and includes a transparent cover Light board and a light shielding layer. The light shielding layer is formed on the edge of the light transmissive plate and has a hollow pattern. The switch is disposed on the second surface of the touch substrate. The display panel is relative to the touch panel configuration.

In order to provide a better understanding of the above and other aspects of the present invention, the following detailed description of the embodiments and the accompanying drawings

Please refer to FIG. 1 , which is a cross-sectional view of a touch display panel according to an embodiment of the invention. The touch display panel 10 is, for example, a resistive touch substrate, and includes a touch panel 100 , a display panel 200 , and an outer frame 300 . The display panel 200 and the touch panel 100 are disposed in the outer frame 300 , wherein the display panel 200 is disposed relative to the touch panel 100 .

Referring to FIGS. 2 and 3, FIG. 2 is a plan view of FIG. 1, and FIG. 3 (not showing the display panel and the outer frame) is a cross-sectional view taken along line 3-3' in FIG. 2. The touch panel 100 includes a cover 110 , at least one switch 120 , and a touch substrate 130 .

The cover plate 110 is disposed on the first surface 130u of the touch substrate 130 and includes a light transmissive plate 111 and a light shielding layer 112. The light shielding layer 112 is, for example, a black matrix (BM) formed on the edge of the light transmissive plate 111 and having a hollow pattern 1121, wherein the hollow pattern 1121 is an image, such as a boot image, a shutdown graphic, a volume control graphic, an Enter graphic, or the like. A graphic that represents the meaning of control.

The switch 120 can be a physical switch, such as a capacitive or resistive switch, which is additionally fabricated and then bonded to the outer or inner surface of the touch substrate 130 in a temporary or permanent manner by bonding, assembling, snapping, or the like. In this example, the entire switch 120 is disposed on the second surface 130b of the touch substrate 130. Under this design, the complex structure design of the touch substrate 130, such as opening, trenching, etc., is not required. When the hollow pattern 1121 is touched, the switch 120 can sense the static electricity of the finger to trigger; or, the touch substrate 130 is deformed due to the touch of the cover 110, thereby triggering the switch 120. After the switch 120 is triggered, the signal can be transmitted to a circuit board (not shown), such as the flexible circuit board of the touch substrate 130 or the circuit board of the display panel 200, to transmit signals to the circuit board, and the corresponding signals are touched. The function of the hollow pattern 1121 (such as power on, power off, volume adjustment, Enter or other suitable function). In this example, the position of the switch 120 overlaps with the hollow pattern 1121 to make the distance between the switch 120 and the hollow pattern 1121 shorter or shorter, thereby improving the sensitivity of the switch 120. In another example, the touch panel 100 further includes a stop plate (not shown) located below the switch 120. When the touch substrate 130 is deformed, the switch 120 is forced to press against the stop plate, thereby triggering the switch 120.

With the configuration of the switch 120, the area of the light shielding layer 112 is configured to provide at least one touch function, thereby enabling the touch area to provide other more functions of touch.

The touch substrate 130 has a first surface 130u and a second surface 130b opposite to each other. The touch substrate 130 includes a first substrate 131 , a first sensing layer 132 , and a first edge conductive layer 133 . The first substrate 131 is, for example, glass having an opposite inner surface 131s and a second surface 130b.

The first sensing layer 132 is formed on the inner surface 131s of the first substrate 131. The first sensing layer 132 may be made of a transparent conductive material (TCO) or a transparent organic conductive material, such as a transparent conductive material such as Indium Tin Oxide (ITO) or indium zinc oxide. , IZO), and the transparent organic conductive material is, for example, polyethylene dioxythiophene (PEDOT).

The first edge conductive layer 133 is formed on the edge of the first substrate 131 and overlaps the region of the switch 120 and is electrically isolated from the first sensing layer 132 through the first isolation trench 131g. The first isolation trench 131g is formed between the first sensing layer 132 and the first edge conductive layer 133, and completely isolates the first sensing layer 132 from the first edge conductive layer 133, thereby avoiding the touch generated by the hollow pattern 1121. The electrical signal is transmitted to the first sensing layer 132 through the first edge conductive layer 133. In another example, the first edge conductive layer 133 may be omitted to expose the edge of the inner surface 131s of the first substrate 131, wherein the edge overlaps the switch 120 in the thickness direction.

After the first edge conductive layer 133 and the first sensing layer 132 are formed of the same material, the first isolation trench 131g is formed by, for example, chemical etching or laser cutting. In another example, the first edge conductive layer 133 may be completely removed by a similar method to expose the edge of the inner surface 131s of the first substrate 131.

The touch substrate 130 further includes a second substrate 134, a second sensing layer 135, and a second edge conductive layer 136. The second substrate 134 has an opposite inner surface 134s and a first surface 130u. The second substrate 134 is, for example, an insulating material having high light transmittance, such as glass, polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate. (Polymethylmethacrylate, PMMA) or a cyclic olefin copolymer (Cyclic Olefin Copolymer) and other materials. In this example, the second substrate 134 may have flexibility.

The second sensing layer 135 is formed on the inner surface 134s of the second substrate 134. The material of the second sensing layer 135 is similar to that of the first sensing layer 132, and will not be described again.

The second edge conductive layer 136 is formed on the inner surface 134s of the second substrate 134 and overlaps the region of the switch 120 and is electrically isolated from the second sensing layer 135 through the second isolation trench 134g. The second isolation trench 134g is formed between the second sensing layer 135 and the second edge conductive layer 136, and completely isolates the second sensing layer 135 from the second edge conductive layer 136, thereby avoiding the touch generated by the hollow pattern 1121. The electrical signal is transmitted to the second sensing layer 135 through the second edge conductive layer 136. In another example, the second edge conductive layer 136 may be omitted to expose the edge of the inner surface 134s of the second substrate 134, wherein the edge overlaps the switch 120 in the thickness direction.

After the second edge conductive layer 136 and the second sensing layer 135 are formed of the same material, the second isolation trench 134g is formed by, for example, chemical etching or laser cutting. In another example, the second edge conductive layer 136 can be removed in a similar manner to expose the edge of the inner surface 134s of the second substrate 134.

The touch substrate 130 further includes a double-sided tape 137 that spaces and bonds the first substrate 131 and the second substrate 134 . A portion of the double-sided tape 137 may extend to a region of at least a portion of the first isolation trench 131g. In another example, the double-sided tape 137 may be completely located between the first edge conductive layer 133 and the second edge conductive layer 136 without contacting the first isolation trench 131g.

Referring to FIGS. 4 and 2, FIG. 4 is a cross-sectional view taken along line 4-4' in FIG. 2 (not showing the display panel and the outer frame). The touch substrate 130 further includes a first electrode line 1321 (second and fourth figures) and a second electrode line 1322 (second drawing) disposed opposite to the first sensing layer 132. The area between the first electrode line 1321 and the second electrode line 1322 defines a sensing area that senses the touch signal along the Y axis (Fig. 2). In addition, the touch substrate 130 further includes a third electrode line 1351 (second and third figures) and a fourth electrode line 1352 (the first 2 and 4), which are disposed opposite to the second sensing layer 135. A sensing area is defined between the third electrode line 1351 and the fourth electrode line 1352 to sense a touch signal along the X axis (Fig. 2).

In conclusion, the present invention has been disclosed in the above embodiments, but it is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

10‧‧‧Touch display panel

100‧‧‧ touch panel

110‧‧‧ cover

111‧‧‧light board

112‧‧‧Lighting layer

1121‧‧‧ hollow pattern

120‧‧‧ switch

130‧‧‧Touch substrate

130b‧‧‧ second side

130u‧‧‧ first side

131‧‧‧First substrate

131g‧‧‧first isolation trench

131s, 134s‧‧‧ inner surface

132‧‧‧First sensing layer

1321‧‧‧First electrode line

1322‧‧‧Second electrode line

133‧‧‧First edge conductive layer

134‧‧‧second substrate

134g‧‧‧Second isolation trench

135‧‧‧Second sensing layer

1351‧‧‧third electrode line

1352‧‧‧fourth electrode line

136‧‧‧Second edge conductive layer

137‧‧‧double-sided tape

200‧‧‧ display panel

300‧‧‧Front frame

FIG. 1 is a cross-sectional view of a touch display panel according to an embodiment of the invention.

Fig. 2 is a plan view showing Fig. 1.

Fig. 3 (not showing the display panel and the outer frame) shows a cross-sectional view taken along line 3-3' in Fig. 2.

FIG. 4 is a cross-sectional view taken along line 4-4' in FIG. 2 (not showing the display panel and the outer frame).

100‧‧‧ touch panel

1121‧‧‧ hollow pattern

131g‧‧‧first isolation trench

1321‧‧‧First electrode line

1322‧‧‧Second electrode line

1351‧‧‧third electrode line

1352‧‧‧fourth electrode line

300‧‧‧Front frame

Claims (10)

A touch panel includes: a touch substrate having a first surface and a second surface; a cover plate disposed on the first surface of the touch substrate and including: a light transmissive plate; a light shielding layer is formed on the edge of the light transmissive plate and has a hollow pattern; and a switch is disposed on the second surface of the touch substrate, and the switch corresponds to the same function as the hollow pattern. The touch panel of claim 1, wherein the touch substrate comprises: a first substrate having an opposite inner surface and the second surface; and a first sensing layer formed on the first substrate And the first edge conductive layer is formed on the edge of the first substrate and overlaps the region of the switch and is electrically isolated from the first sensing layer. The touch panel of claim 2, wherein the touch substrate further comprises: a first isolation trench formed between the first sensing layer and the first edge conductive layer, and completely isolating the The first sensing layer and the first edge conductive layer. The touch panel of claim 1, wherein the touch panel The control substrate includes: a second substrate having an opposite inner surface and the first surface; a second sensing layer formed on the inner surface of the second substrate; and a second edge conductive layer formed on the second substrate The inner surface of the second substrate overlaps with the region of the switch and is electrically isolated from the second sensing layer. The touch panel of claim 4, wherein the touch substrate further comprises: a second isolation trench formed between the second sensing layer and the second edge conductive layer, and completely isolating the a second sensing layer and the second edge conductive layer. The touch panel of claim 1, wherein the touch substrate comprises: a first substrate having an opposite inner surface and the second surface; and a first sensing layer formed on the first An edge of the inner surface of the first substrate is exposed on the inner surface of the substrate, and an area of the edge overlaps the open relationship. The touch panel of claim 1, wherein the touch substrate comprises: a second substrate having an opposite inner surface and the second surface; and a second sensing layer formed on the second substrate An edge of the inner surface of the second substrate is exposed on the inner surface, and the area of the edge is opened The relationship overlaps. The touch panel of claim 1, wherein the touch substrate comprises: a first substrate; a second substrate; and a double-sided tape separating the first substrate and the second substrate. The touch panel of claim 1, wherein the touch substrate is a resistive touch substrate. A touch display panel comprising: the touch panel as described in claim 1; and a display panel disposed relative to the touch panel.