TW202101186A - Touch display device - Google Patents

Abstract

The present invention provides a touch display device including a first substrate, a plurality of pixel units, a first conductive structure, a second substrate, a first spacer, and a first auxiliary support block. The first substrate includes an adjacent display area and a peripheral area. A plurality of pixel units are disposed on the first substrate and located in the display area. The first conductive structure is disposed on the first substrate and is composed of a plurality of first metal lines and is located in the display area. The second substrate is disposed opposite to the first substrate. The first spacer is disposed on the second substrate, and the first spacer contacts the first metal line to form a first overlapping region. A first auxiliary support block is disposed on the first substrate, the first auxiliary support block is disposed corresponding to the first metal line, and the first spacer is also in contact with the first auxiliary support block to form A second overlapping area.

Description

Touch display device

The present invention relates to a display device, and more particularly to a touch display device with a support structure formed on a substrate.

With the development of technology, display devices are widely used in many electronic products, such as mobile phones, tablet computers, watches and so on. In order to improve display quality, large-size, high-resolution, and high-brightness display devices have emerged.

Generally speaking, the touch display panel has a display area and a peripheral area outside the display area. There are multiple pixel structures arranged in an array in the display area, and COF Pad, Multiplexer (Mux), Test Pad (CT Pad), test circuit, and electrostatic discharge protection are often formed in the peripheral area. Circuit (ESD) and other possible drive circuits and related traces. In the prior art, the electrical connection between the touch electrode and the driving circuit is usually achieved through a metal layer, such as the third metal layer M3.

4 is a schematic diagram of the structure of a conventional touch display device. As shown in FIG. 4, in the conventional touch display device 100, a spacer 103 is formed between two opposed substrates 101 and 102 to isolate and support the substrate, and contact pads are usually formed on the flat layer 105 in the display area. 104 (Bump) corresponds to the spacer 103 and supports the spacer 103. At the same time, the flat layer 105 also needs to be simultaneously A through hole is formed as a circuit path of the third metal layer 106. However, with the trend of display devices pursuing a full-screen display area, it is difficult to take into account the height of the contact pad and the size and spacing of the through holes at the same time under the demand for narrower and narrower frames, which greatly restricts the flexibility of product design. .

Therefore, how to not only support the spacers well, but also take into account the height of the contact pads and the size and spacing of the through holes is one of the problems that need to be overcome urgently in the manufacture of the current touch display device.

In order to solve the above-mentioned problems, the present invention provides a touch display device, which can provide good support to the spacers, while taking into account the height of the contact pad and the size and spacing of the through holes, thereby improving the flexibility of product design.

The touch display device of the present invention includes a first substrate including a display area and a peripheral area adjacent to each other; a plurality of pixel units arranged on the first substrate and located in the display area; and a first conductive Structure, arranged on the first substrate, composed of a plurality of first metal wires and located in the display area; a second substrate arranged opposite to the first substrate; a first spacer arranged on the A second substrate, and the first spacer is in contact with the first metal line to form a first overlapping area; a first auxiliary support block is disposed on the first substrate, and the first auxiliary support block It is arranged corresponding to the first metal wire, and the first spacer is also in contact with the first auxiliary support block and forms a second overlapping area.

The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments, but not as a limitation to the present invention.

100‧‧‧Touch display device

101、102‧‧‧Substrate

103‧‧‧Spacer

104‧‧‧Contact pad

105‧‧‧Flat layer

106‧‧‧Metal layer

200‧‧‧Touch display device

201‧‧‧First substrate

202‧‧‧Second substrate

203‧‧‧Spacer

204‧‧‧Auxiliary support block

205‧‧‧flat layer

AA‧‧‧display area

BA‧‧‧ Surrounding area

IC‧‧‧Drive circuit components

TL‧‧‧Trace

TL1‧‧‧The first wiring part

TL2‧‧‧Second wiring part

d‧‧‧Pitch

FIG. 1A is a schematic diagram of the structure of a touch display device according to an embodiment of the invention.

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

Fig. 1C is a schematic top view of Fig. 1B.

2A is a schematic top view of the structure of a touch display device according to another embodiment of the invention.

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

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

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

Figure 3 is a schematic diagram of the structure of the auxiliary support block of the present invention.

4 is a schematic diagram of the structure of a conventional touch display device.

The structural principle and working principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

FIG. 1A is a schematic diagram of the structure of a touch display device according to an embodiment of the present invention, FIG. 1B is a schematic cross-sectional view along A-A' of FIG. 1A, and FIG. 1C is a schematic top view of FIG. 1B. As shown in FIG. 1A, FIG. 1B and FIG. 1C, the touch display device 200 includes a first substrate 201. The first substrate 201 is, for example, a TFT substrate, and includes a display area AA and a peripheral area BA that are arranged adjacently. The display area AA is formed There are multiple pixel units (not shown in the figure); a driving circuit element IC for driving the pixel units is formed in the peripheral area BA, and the pixel units in the display area AA are connected Multiple traces TL are electrically connected to the driving circuit element IC in the peripheral area BA to achieve display and/or touch functions. Usually, the trace TL uses a third metal layer (M3) and is formed on the flat surface of the first substrate 201 On layer 205. The second substrate 202 is, for example, a filter CF, and is disposed opposite to the first substrate 201. A plurality of spacers 203 are formed on the second substrate 202 to isolate and support the first substrate 201 and the second substrate 202. To simplify the description, only one trace TL is exemplarily drawn in FIG. 1A, and those skilled in the art can clearly know that there should be multiple traces TL.

Specifically, in conjunction with FIG. 1A and FIG. 1B, in the display area AA of the touch display device 200, corresponding to the position of the spacer 203, a trace TL is formed under the spacer 203, and the size of the spacer 203 is usually smaller. The width of the line TL is large, and the spacer 203 cannot be well supported by the trace TL alone, which easily causes the spacer 203 to tilt.

As shown in FIGS. 1A and 1C, in this embodiment, auxiliary support blocks 204 are formed on both sides of the trace TL. Wherein, the spacer 203 is in contact with the trace TL and forms a first overlapping area, as shown by the oblique area in the figure. At the same time, the auxiliary support block 204 is also in contact with the spacer 203 and forms a second overlapping area, as shown by the backslash area in the figure. Wherein, the auxiliary support block 204 is formed of the same film layer and the third metal layer (M3) as the trace TL material. It is worth noting that because the auxiliary support block 204 is made of a third metal layer (M3), it needs to be at a certain distance from the trace TL to achieve electrical isolation between the auxiliary support block 204 and the trace TL . In this way, by arranging auxiliary support blocks 204 on both sides of the trace TL, it can be very A good support spacer 203 can simultaneously take into account the height of the trace TL and the size and spacing of the through holes, so that the touch display device can achieve a narrow frame.

In addition, in this embodiment, the auxiliary support blocks 204 are arranged on both sides of the trace TL. Of course, as a modification, the auxiliary support blocks 204 can also be arranged on one side of the trace TL, as long as the spacer 203 can be Support, the present invention is not limited to this.

2A is a schematic top view of the structure of a touch display device according to another embodiment of the present invention. FIG. 2B is a schematic cross-sectional view along BB' of FIG. 2A, FIG. 2C is a schematic cross-sectional view along C-C' of FIG. 2A, and FIG. 2A is a schematic cross-sectional view along D-D'. As shown in FIG. 2A, FIG. 2B, FIG. 2C, and FIG. 2D, a plurality of traces TL are formed in the peripheral area BA of the touch display device 200, and the pixel unit in the display area AA passes through the plurality of traces TL and the driving circuit The component IC is electrically connected. Each trace TL includes two parts, namely a first wiring portion TL1 and a second wiring portion TL2. Specifically, the first wiring portion TL1 is electrically connected to the corresponding trace TL in the display area AA, one end of the second wiring portion TL2 is connected to the first wiring portion TL1, and the other end is connected to the driving circuit element IC .

Specifically, as shown in FIG. 2B, in this embodiment, the wiring between the first wiring portions TL1 of two adjacent traces TL is relatively dense, for example, between two adjacent first wiring portions TL1 The spacing is less than or equal to 5.2um. At this time, there are multiple traces TL corresponding to the first wiring portion TL1 under the spacer 203 at the same time. The first wiring portion TL1 can support the spacer 203 well, and the spacer 203 will not tilt. In this way, in the area of the plurality of first wiring portions TL1, the spacers 203 respectively correspond to the plurality of traces TL (ie, the first wiring portion TL1). Taking FIG. 2B as an example, one spacer 203 corresponds to three First go The line portion TL1, in other words, the projection area of the spacer 203 on the first substrate 201 and the projection area of the plurality of first wiring portions TL1 overlap each other.

Specifically, as shown in FIG. 2C again, in this embodiment, there are still some areas in the peripheral area BA, in which no trace TL passes, or the distance between two adjacent traces TL is very large. At this time, It is necessary to form an auxiliary support block 204 corresponding to the spacer 203, and the spacer 203 is in contact with the auxiliary support block 204 and is supported by the auxiliary support block 204 without tilting. In this embodiment, the auxiliary support block 204 may be rectangular, circular, oval, arc or other irregular shapes, and the area enclosed by the outer contour of the auxiliary support block 204 should be greater than the area of the top surface of the spacer 203. In order to better achieve support.

2D, in this embodiment, the wiring between the second wiring portions TL2 of two adjacent traces TL is relatively loose, for example, the width of the second wiring portion TL2 is about 3.55 μm, and the two adjacent traces TL The distance d between the second wiring portions TL2 is between 10 μm and 20 μm. At this time, similar to the embodiment shown in FIG. 1C, auxiliary supporting blocks 204 are formed on both sides of the second wiring portion TL2 of the trace TL, wherein the distance between the auxiliary supporting block 204 and the second wiring portion TL2 may be, for example, It is 5.2 μm; the auxiliary supporting block 204, the second wiring portion TL2 and the supporting spacer 203 are in contact with each other and form a third overlapping area, as shown by the oblique area in the figure. The auxiliary support block 204 and the second wiring portion TL2 jointly support the spacer 203, and the spacer 203 will not tilt. Of course, the foregoing only exemplifies the width of the second wiring portion TL2, the spacing between the second wiring portions TL2, and the spacing between the auxiliary support block 204 and the second wiring portion TL2, but the present invention does not use this Is limited.

Wherein, in this embodiment, the auxiliary support block 204 uses the same material layer as the trace TL, and the auxiliary support block 204 and the trace TL are electrically isolated from each other.

Figure 3 is a schematic diagram of the structure of the auxiliary support block of the present invention. As shown in Figure 3, the auxiliary support block 204 may be composed of a plurality of sub auxiliary support blocks, each sub auxiliary support block may be rectangular, circular, oval, arc or other irregular shapes, and the sub auxiliary support blocks are collectively composed The outer contour of the auxiliary support block 204 can present a rectangular, elliptical, circular or irregular shape, and the area enclosed by the outer contour of the auxiliary support block 204 composed of the sub-auxiliary support blocks should be larger than the top surface of the spacer 203 Area can better achieve support. The present invention only takes the shape shown in FIG. 3 as an example, but is not limited thereto.

本發明所附的請求項的保護範圍。 Of course, the present invention can also have various other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and Deformation should belong to

The scope of protection of the appended claims of the present invention.

200‧‧‧Touch display device

201‧‧‧First substrate

202‧‧‧Second substrate

203‧‧‧Spacer

204‧‧‧Auxiliary support block

205‧‧‧flat layer

TL‧‧‧Trace

Claims (13)

A touch display device includes: A first substrate including an adjacent display area and a peripheral area; A plurality of pixel units are arranged on the first substrate and located in the display area; A first conductive structure, disposed on the first substrate, composed of a plurality of first metal wires and located in the display area; A second substrate arranged opposite to the first substrate; A first spacer is disposed on the second substrate, and the first spacer is in contact with the first metal line and forms a first overlapping area; A first auxiliary support block is disposed on the first substrate, the first auxiliary support block is disposed corresponding to the first metal wire, and the first spacer is also in contact with the first auxiliary support block and A second overlap area is formed. The touch display device according to claim 1, further comprising: a second conductive structure, disposed on the first substrate, composed of a plurality of second metal wires and located in the peripheral area; A driving circuit element disposed on the first substrate and located in the peripheral area; The plurality of second metal wires respectively have a first wiring portion and a second wiring portion that are connected, and one end of the second wiring portion is connected to the first wiring portion, and the other end is Electrically connected to the drive circuit element; A second spacer disposed on the second substrate; A second auxiliary support block disposed on the first substrate and located in the peripheral area; Wherein, the position of the second auxiliary support block corresponds to the second wiring portion of the second metal wire, and the second auxiliary support block and the corresponding second wiring portion respectively contact the The second spacer forms a third overlapping area. According to the touch display device according to claim 1, the first conductive structure and the first auxiliary support block use the same material layer, and the first conductive structure and the first auxiliary support block are electrically connected to each other. isolation. According to the touch display device according to claim 2, the second conductive structure and the second auxiliary support block are made of the same material layer, and the second conductive structure and the second auxiliary support block are electrically connected to each other. isolation. According to the touch display device of claim 2, the outer contour of the first auxiliary support block and/or the second auxiliary support block is rectangular, circular, elliptical or irregular. According to the touch display device according to claim 5, the first auxiliary support block is composed of a plurality of first sub auxiliary support blocks, and the second auxiliary support block is composed of a plurality of second sub auxiliary support blocks. According to the touch display device according to claim 6, each of the first sub-auxiliary supporting block and/or the second sub-auxiliary supporting block has a rectangular, semicircular, arc or irregular shape. According to the touch display device of claim 1, the outer contour area of the first auxiliary support block is larger than the area of the surface of the first spacer in contact therewith. According to the touch display device according to claim 2, the outer contour area of the second auxiliary support block is larger than the area of the surface of the second spacer in contact therewith. According to the touch display device of claim 2, the line pitch of the first wiring portions of the two adjacent second metal wires is less than or equal to 5.2 um. The touch display device according to claim 2, further comprising a third spacer disposed on the second substrate and positioned corresponding to the peripheral area; wherein the third spacer is connected to the adjacent The first wiring portions of the two second metal wires are in contact. According to the touch display device of claim 2, the distance between the second wiring portions of the two adjacent second metal wires is between 10 μm and 20 μm. The touch display device according to claim 2, further comprising: A fourth spacer disposed on the second substrate and positioned corresponding to the peripheral area; and A third auxiliary support block arranged on the first substrate; The plurality of second metal wires have a first group of second metal wires and a second group of second metal wires, and the third auxiliary support block is located between the first group of second metal wires and the first group of second metal wires. Between two sets of second metal wires; The fourth spacer is in contact with the third auxiliary support block, and the fourth spacer and the second metal wire are structurally isolated from each other.

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