CN101408820A - Touch control display panel - Google Patents

Abstract

The invention provides a touch display panel, which comprises a first substrate, a second substrate and a liquid crystal layer. The first substrate comprises a plurality of sensing areas and a non-sensing area positioned outside the sensing areas, and each sensing area is internally provided with a first electrode. The second substrate comprises a plurality of main spacers, a plurality of sensing bumps, a plurality of first auxiliary spacers and a plurality of second auxiliary spacers. The main spacers are connected to the non-sensing area of the first substrate. The sensing bump corresponds to the sensing region and is provided with a second electrode, and a sensing gap is maintained between the sensing bump and the first substrate. The first auxiliary gap object corresponds to the non-sensing area and maintains a first auxiliary gap with the first substrate. The second auxiliary gap object corresponds to the non-sensing area and maintains a second auxiliary gap with the first substrate. The sensing gap is larger than the first auxiliary gap and smaller than the second auxiliary gap.

Description

touch display panel

technical field

The present invention relates to a touch display panel, and in particular to a built-in touch display panel.

Background technique

In recent years, with the rapid development of various applications such as information technology, wireless communication and information home appliances, in order to achieve more convenience, smaller volume and more humanization, the input devices of many information products have been replaced by traditional keyboards or slides. mouse etc. into a touch display panel (touch display panel).

FIG. 1 is a partial cross-sectional schematic diagram of a known touch display panel. Please refer to FIG. 1 , a conventional touch display panel 100 includes a first substrate 110 , a second substrate 120 and a liquid crystal layer 130 . The second substrate 120 has main spacers 128 a , sensing bumps 128 b , auxiliary spacers 128 c and second electrodes 126 . The first substrate 110 has a sensing pad structure 114b, and the sensing pad structure 114b has a first electrode 116 thereon. The main function of the main spacer 128a is to maintain a certain distance (cell gap) between the second substrate 120 and the first substrate 110, and the function of the auxiliary spacer 128c is when the external force is much greater than that of the main spacer 128a and the sensing bump. The block 128b assists in supporting when it can bear it, so as to prevent the main spacer 128a and the sensing bump 128b from being damaged due to excessive deformation.

As mentioned above, under normal conditions, the first electrode 116 on the sensing pad structure 114b is not in direct contact with the second electrode 126 on the sensing bump 128b, and there is an inductive contact between the two. Measure the gap Gs. When an external force is applied to the second substrate 120 and the deformation of the main spacer 128a is greater than the sensing gap Gs, the first electrode 116 and the second electrode 126 that are not in direct contact will be conducted, and thus the first electrode 116 and the second electrode 126 that are not in direct contact will be conducted. form a voltage change. Detect this voltage change, and then convert it into a signal through the system and convert it into coordinates to obtain the position of the pressing point.

However, the prior art has the following disadvantages: First, after multiple presses, the deformation of the main spacer 128a and the sensing bump 128b increases and the elastic restoring force becomes worse, causing the sensing gap Gs to shrink or even disappear, that is, , the first electrode 116 is in direct contact with the second electrode 126 at certain points, and this state will cause poor touch function or short circuit (touch function short), and in serious cases may also cause a touch on the top of the sensing bump 128b. The second electrode 126 is damaged.

If it is desired to increase the pressure resistance and lifespan of the touch display panel 100 by adding the main spacer 128a, the minimum external force (active force) capable of sensing touch must be increased, that is, the sensitivity of touch sensing will increase. In addition, it is easier to produce low-temperature liquid crystal bubbles. The so-called low-temperature liquid crystal bubbles are due to the fact that the main spacer 128a and the liquid crystal layer 130 have different shrinkage coefficients, so the two volumes cannot shrink in an equal proportion in a low-temperature environment, so the liquid crystal layer 130 that should be full of liquid crystal molecules is originally formed. The voids that can be observed by the user through the display panel are generally referred to as low-temperature liquid crystal bubbles.

Secondly, since the main spacer 128a is always in contact with the first substrate 110 below, the lower pixel electrode (not shown in this figure) must be separated from the main spacer 128a by a certain distance, so as to avoid the main The displacement of the spacer 128a causes the second electrode 126 on the second substrate 120 to bridge incorrectly with the pixel electrode, forming a phenomenon of display abnormality. In other words, the aperture ratio of the panel itself will decrease, which indirectly results in a decrease in light transmittance or an increase in the cost of the backlight module.

Moreover, since the second electrode 126 on the sensing bump 128b has to be in contact with the first electrode 116 on the sensing pad structure 114b, the potential of the first electrode 116 changes to convert the touched position. Therefore, the first electrode The thickness of the alignment film material above 116 also affects the minimum active force that can sense touch. The sensing pad height structure 114b known in the past is all formed by different stacking layers of thin film transistors on the first substrate 110, so its height cannot be effectively increased. Therefore, when the alignment film is transferred to the first substrate 110 by using APR (relief printing) method, the thickness of the remaining alignment film above the sensing pad structure 114b cannot be reduced due to the difference in height, which will affect the uniformity and The minimum active force required to sense touch.

Therefore, how to overcome and prevent the above-mentioned defects is an urgent problem to be overcome in the current production technology of the touch display panel.

Contents of the invention

The present invention increases the support force of the touch display panel by adding auxiliary spacers, improves its pressure resistance and life, and does not sacrifice the sensitivity of the touch panel itself.

The invention can solve the phenomenon of display abnormality generated by the touch panel, and meanwhile can effectively improve the aperture ratio of the panel.

The gap maintained between the spacer and the raising structure of the touch display panel of the present invention can be achieved through multiple processes and different combinations of upper and lower heights, so its design is more flexible and diverse.

The present invention proposes a touch display panel including a first substrate, a second substrate and a liquid crystal layer, wherein the second substrate is disposed opposite to the first substrate, and the liquid crystal layer is disposed between the first substrate and the second substrate. The first substrate includes a plurality of sensing regions and a non-sensing region outside the sensing regions, and each sensing region has a first electrode. The second substrate is arranged opposite to the first substrate, and is located on a side of the first substrate with the sensing area. A side of the second substrate facing the first substrate is provided with a plurality of main spacers, a plurality of sensing bumps, a plurality of first auxiliary spacers and a plurality of second auxiliary spacers. The main spacer is connected to the non-sensing area of the first substrate. The sensing bump corresponds to the sensing region of the first substrate and has a second electrode, and a sensing gap is maintained between the first substrate and the second substrate at the position of the sensing bump. The first auxiliary spacer corresponds to the non-sensing area of the first substrate, and the first auxiliary space is maintained between the first substrate and the second substrate at the position of the first auxiliary spacer. The second auxiliary spacer corresponds to the non-sensing area of the first substrate, and the first substrate and the second substrate maintain a second auxiliary gap at the position of the second auxiliary spacer. The first auxiliary gap is smaller than the sensing gap, and the sensing gap is smaller than the second auxiliary gap.

In an embodiment of the present invention, the above-mentioned first electrode includes a sensing electrode.

In an embodiment of the present invention, the above-mentioned second electrode includes a common electrode, and the common electrode covers the above-mentioned sensing bump.

In an embodiment of the present invention, at least one of the main spacer, the first auxiliary spacer and the second auxiliary spacer is covered by the common electrode.

In an embodiment of the present invention, the above-mentioned main spacers, first auxiliary spacers or second auxiliary spacers covered by the common electrode have the same height as the sensing bump.

In an embodiment of the present invention, at least one of the main spacer, the first auxiliary spacer and the second auxiliary spacer is located on the common electrode.

In an embodiment of the present invention, the above-mentioned main spacers, first auxiliary spacers or second auxiliary spacers on the common electrode have heights different from those of the sensing bumps.

In an embodiment of the present invention, the above-mentioned main spacers, first auxiliary spacers or second auxiliary spacers on the aforementioned common electrode include columnar spacers or spherical spacers.

In an embodiment of the present invention, the above-mentioned main spacers, first auxiliary spacers or second auxiliary spacers on the aforementioned common electrode are spherical spacers, and the second substrate is at a position corresponding to these spherical spacers There are multiple depressions on the surface, and spherical spacers are embedded in the depressions.

In an embodiment of the present invention, the above-mentioned second substrate further includes a color filter layer located under the common electrode layer.

In an embodiment of the present invention, the above-mentioned second substrate further includes a black matrix located under the common electrode layer.

In an embodiment of the present invention, at least one of the above-mentioned sensing bumps, main spacers, first auxiliary spacers and second auxiliary spacers is located on the black matrix.

In an embodiment of the present invention, the above-mentioned first substrate includes a plurality of sensing padding structures, a plurality of main padding structures, a plurality of first auxiliary padding structures, and a plurality of second auxiliary padding structures. The sensing pad structure is located under the first electrode in the sensing area and corresponds to the sensing bump. The main pad structure is located in the non-sensing area and correspondingly connected to the main spacer. The first auxiliary padding structure is located in the non-sensing area and corresponds to the first auxiliary spacer. The second auxiliary padding structure is located in the non-sensing area and corresponds to the second auxiliary spacer.

In an embodiment of the present invention, in the above-mentioned sensing padding structure, main padding structure, first auxiliary padding structure and second auxiliary padding structure, the thickness of the main padding structure is greater than that of the first auxiliary padding structure The thickness of the first auxiliary raising structure is greater than the thickness of the sensing raising structure, and the thickness of the sensing raising structure is greater than the thickness of the second auxiliary raising structure.

In an embodiment of the present invention, the ratio of the distribution density of the first auxiliary spacers on the second substrate to the distribution density of the main spacers on the second substrate is between 1 and 100.

In an embodiment of the present invention, the ratio of the distribution density of the first auxiliary spacers on the second substrate to the distribution density of the main spacers on the second substrate is between 5 and 15.

The present invention further proposes a touch display panel, including a first substrate, a second substrate, multiple main support structures, multiple sensing structures, multiple first auxiliary support structures, multiple second auxiliary support structures, and a liquid crystal layer. The second substrate is arranged opposite to the first substrate, and the liquid crystal layer is arranged between the first substrate and the second substrate. The first substrate includes a plurality of sensing regions and a non-sensing region outside the sensing regions, and each sensing region has a first electrode. The second substrate is set opposite to the first substrate and is located on a side of the sensing region. The main supporting structure is disposed in the non-sensing area, and connects the first substrate and the second substrate. The sensing structure is disposed between the first substrate and the second substrate in the sensing region, and includes a first electrode disposed on one side of the first substrate, and a second electrode disposed on one side of the second substrate, and There is a sensing gap between the first electrode and the second electrode. The first auxiliary supporting structure is disposed between the first substrate and the second substrate in the non-sensing area, and has a first auxiliary gap. The second auxiliary supporting structure is disposed between the first substrate and the second substrate in the non-sensing area, and has a second auxiliary gap, wherein the first auxiliary gap is smaller than the sensing gap, and the sensing gap is smaller than the second auxiliary gap.

In an embodiment of the present invention, the above-mentioned first electrode includes a sensing electrode.

In an embodiment of the present invention, the above-mentioned second electrode includes a common electrode.

In an embodiment of the present invention, the above-mentioned main support structure includes a main spacer located on one side of the first substrate, and a main padding structure located on one side of the second substrate, and the main spacer and the main pad Tall structures meet.

In an embodiment of the present invention, the above-mentioned first auxiliary supporting structure includes a first auxiliary spacer located on one side of the first substrate, and a first auxiliary padding structure located on one side of the second substrate. There is a first auxiliary gap between an auxiliary spacer and the first auxiliary raising structure.

In an embodiment of the present invention, the above-mentioned sensing structure includes a sensing bump disposed between the first electrode and the first substrate, and a sensing pad structure disposed between the second electrode and the second substrate room.

In an embodiment of the present invention, the above-mentioned second auxiliary support structure includes a second auxiliary spacer located on one side of the first substrate, and a second auxiliary padding structure located on one side of the second substrate. There is a second auxiliary gap between the two auxiliary spacers and the second auxiliary raising structure.

The touch display panel of the present invention increases the support strength of the touch display panel by adding auxiliary spacers, improves its resistance to pressure and life, and reduces the situation of poor touch function or short circuit. Since the means of adding the main support spacer is not used, the sensing sensitivity of the touch panel itself will not be sacrificed, and the chance of low-temperature liquid crystal bubbles will not be increased.

In addition, the present invention can adopt a multi-channel spacer process, so the gap maintained between the spacer and the padding structure can not only be achieved by the height difference formed by the thin film transistor process on the first substrate, but also can be realized by using the second substrate Above, the height change of the spacer itself is achieved. Therefore, its design is more flexible and diverse, and can effectively reduce the thickness of the alignment film on the sensing pad of the first substrate, so as to increase the sensing sensitivity and overall uniformity of the touch panel itself.

Moreover, through the multi-channel spacer process, the second electrode can be selectively removed from the main spacer or other auxiliary spacers, so that the problem of the second electrode and the second electrode can be solved when the touch panel is displaced or the pair is misaligned when the touch panel is pressed. The abnormal display phenomenon caused by the wrong bridge connection of the first electrode below. Because of this, there is no need to greatly increase the distance between the electrodes in the pixel region and the main spacers in advance when designing the layout of the first substrate in order to prevent alignment errors, so the aperture ratio can be effectively improved.

Description of drawings

FIG. 1 is a cross-sectional view of a known touch display panel.

2A-2B are cross-sectional views of a touch display panel according to an embodiment of the present invention.

3A-3B are cross-sectional views of a touch display panel according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a touch display panel according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a touch display panel according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view of a touch display panel according to an embodiment of the present invention.

Figure number:

100, 200: touch display panel

110, 210: the first substrate

114b: Sensing pad height structure

116, 216: first electrode

120, 220: second substrate

126, 226: second electrode

128a: Main spacer

128b: Sensing bump

128c: auxiliary spacer

130, 230: liquid crystal layer

210a: gate layer

210b: gate insulating layer

210c: semiconductor layer

210d: source layer

210e: protective layer

212a: scan line

212b: data line

212c: pixel area

214a: Main padding structure

214b: Sensing pad height structure

214c: Second auxiliary padding structure

214d: First auxiliary padding structure

218: Sensing area

222: Black Matrix

224: Color filter layer

228a, 328a, 428a, 528a, 628a: main spacers

228b, 328b, 428b, 528b, 628b: sensing bumps

228c, 328c, 428c, 528c, 628c: Second auxiliary spacers

228d, 328d, 428d, 528d, 628d: first auxiliary spacers

240a: Main support structure

240b: Sensing pad height structure

240c: Second auxiliary support structure

240d: First auxiliary support structure

Gs: sensing gap

Gsub1: first auxiliary gap

Gsub2: second auxiliary gap

H: Groove

Detailed ways

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

It should be noted that the detailed structures presented as examples in the following different embodiments can be combined, replaced or omitted under reasonable circumstances, so as to meet different actual needs. Those skilled in the art should be able to understand the spirit and technical characteristics of the present invention after referring to the description of the following embodiments, and make reasonable changes and applications without departing from the scope of the spirit of the present invention. In addition, in order to facilitate the description and make the description easier to understand, the same reference numerals are used below to denote similar elements, and repeated text descriptions may be omitted.

2A and 2B are partial cross-sectional schematic diagrams of a touch display panel according to an embodiment of the present invention. Please refer to FIG. 2B , the touch display panel 200 includes a first substrate 210 , a second substrate 220 and a liquid crystal layer 230 . The first substrate 210 and the second substrate 220 are disposed opposite to each other, and the liquid crystal layer 230 is disposed between the first substrate 210 and the second substrate 220 . The present invention is described here by taking a touch-type liquid crystal display panel as an example, but it is not limited thereto. The touch-sensitive display panel of the present invention can also be a touch-type organic light-emitting display panel or the like.

In this embodiment, the first substrate 210 is, for example, a thin film transistor array substrate or other types of active device array substrates, and the second substrate 220 is, for example, a color filter substrate including a color filter layer 224 and a black matrix 222 . Of course, the present invention does not limit the types of the first substrate 210 and the second substrate 220 . For example, in other embodiments, the first substrate 210 can also be a COA (Color Filter on Array, a technique of directly coating a color filter on a TFT array) substrate or an AOC (Color Filter on Array) integrated with a color filter layer. Array on Color Filter, a technology that directly fabricates a TFT array on a color filter) substrate, and the second substrate 220 is the opposite substrate.

Please refer to FIG. 2A again. The first substrate 210 of the touch display panel 200 has a plurality of sensing regions 218 and a non-sensing region located outside the sensing regions 218. The non-sensing region can be, for example, a gap between display blocks. non-display area, but not limited thereto. Wherein, the non-sensing area includes a plurality of pixel areas 212c, and each pixel area 212c and each sensing area 218 are surrounded by adjacent two scan lines 212a and two data lines 212b.

Please refer to FIG. 2B again. In this embodiment, the touch display panel 200 further includes a plurality of main support structures 240a, a plurality of sensing structures 240b, a plurality of first auxiliary support structures 240d and a plurality of second auxiliary support structures 240c. .

Wherein, the main supporting structure 240a is disposed in the non-sensing area, and connects the first substrate 210 and the second substrate 220 . The sensing structure 240b is disposed between the first substrate 210 and the second substrate 220 corresponding to the sensing region 218, and includes a first electrode 216 disposed on one side of the first substrate 210, and a second electrode 226 disposed on one side of the first substrate 210. On one side of the second substrate 220 , there is a sensing gap Gs between the first electrode 216 and the second electrode 226 . The first auxiliary supporting structure 240d is disposed between the first substrate 210 and the second substrate 220 corresponding to the non-sensing area, and has a first auxiliary gap Gsub1. The second auxiliary support structure 240c is disposed between the first substrate 210 and the second substrate 220 corresponding to the non-sensing area, and has a second auxiliary gap Gsub2, wherein the first auxiliary gap Gsub1<sensing gap Gs<second auxiliary Gap Gsub2.

In this embodiment, the main supporting structure 240 a further includes a main spacer 228 a disposed on the second substrate 220 . The sensing structure 240b further includes a sensing bump 228b disposed on the second substrate 220 . The second auxiliary supporting structure 240c further includes a second auxiliary spacer 228c disposed on the second substrate 220 . The first auxiliary supporting structure 240d further includes a first auxiliary spacer 228d disposed on the second substrate 220 .

It is worth mentioning that, in the present invention, the main spacers 228a, the sensing bumps 228b, the second auxiliary spacers 228c and the first auxiliary spacers 228d may correspond to opaque areas on the touch display panel 200 , to avoid loss of aperture ratio.

For example, relative to the second substrate 220, the main spacer 228a, the sensing bump 228b, the second auxiliary spacer 228c, and the first auxiliary spacer 228d can all be selectively fabricated on the black matrix on the second substrate 220. 222 , or directly above the color filter layer 224 on the second substrate 220 . In this embodiment, the main spacers 228 a , the sensing bumps 228 b , the second auxiliary spacers 228 c and the first auxiliary spacers 228 d are all located on the black matrix 222 of the second substrate 220 .

On the other hand, relative to the first substrate 210, the main spacer 228a, the second auxiliary spacer 228c and the first auxiliary spacer 228d are all correspondingly disposed above the non-sensing area of the first substrate 210, and can be selectively ground on the scan line 212a, the data line 212b or other opaque areas. In this embodiment, the main spacer 228a, the second auxiliary spacer 228c and the first auxiliary spacer 228d are all located above the scan line 212a. In addition, the sensing bump 228 b is correspondingly disposed above the sensing region 218 of the first substrate 210 .

It is worth mentioning that the main spacer 228 a , the second auxiliary spacer 228 c and the first auxiliary spacer 228 d can be selectively disposed above or below the second electrode 226 . Please refer to FIG. 2A again. In this embodiment, the sensing bump 228b, the second auxiliary spacer 228c and the first auxiliary spacer 228d are manufactured by the same process, so they have the same height. After that, the second electrode 226 is fabricated so that it covers the surfaces of the sensing bump 228b, the second auxiliary spacer 228c and the first auxiliary spacer 228d. Finally, another process is used to fabricate the main spacers 228 a on the second substrate 220 . That is, there is a second electrode 226 on the surface of the sensing bump 228b, the second auxiliary spacer 228c and the first auxiliary spacer 228d and has the same height, while the surface of the main spacer 228a does not contain the second electrode 226. .

In this embodiment, the main spacer 228a is formed after the second electrode 226 is formed, so the second electrode 226 is located under the main spacer 228a, and after the touch display panel 200 is assembled, the contact between the second electrode 226 and the pixels can be avoided. Electrode mis-bridging problem. In other words, there is no need to intentionally separate the pixel electrodes from the second electrodes 226 during design, which helps to increase the area of the pixel electrodes and increase the aperture ratio of the touch display panel 200 . In addition, the present invention can also choose to form the second electrode 226 first, and then form the second auxiliary spacer 228c and the first auxiliary spacer 228d according to requirements.

The main spacer 228a, the second auxiliary spacer 228c, and the first auxiliary spacer 228d are formed after the formation of the second electrode 226, which is beneficial to the adjustment of the main spacer 228a, the second auxiliary spacer 228c, and the first auxiliary spacer 228d. height, and different processes can be used to form the main spacer 228a, the second auxiliary spacer 228c and the first auxiliary spacer 228d respectively, so that the process and structural design of the panel are more flexible and diverse.

Please refer to FIG. 2A and FIG. 2B at the same time. In this embodiment, the main support structure 240 a further includes a main pad structure 214 a disposed on the first substrate 210 . The sensing structure 240b further includes a sensing pad structure 214b disposed on the first substrate 210 . The second auxiliary supporting structure 240c further includes a second auxiliary raising structure 214c disposed on the first substrate 210 . The first auxiliary supporting structure 240d further includes a first auxiliary raising structure 214d disposed on the first substrate 210 .

Wherein, the main spacer 214 a corresponds to the main spacer 228 a on the second substrate 220 and is in contact with each other. The sensing pad structure 214b corresponds to the sensing bump 228b on the second substrate 220 and has a sensing gap Gs therewith. The second auxiliary padding structure 214c corresponds to the second auxiliary spacer 228c on the second substrate 220 and has a sensing gap Gsub2 therewith. The first auxiliary padding structure 214d corresponds to the first auxiliary spacer 228d on the second substrate 220 and has a sensing gap Gsub1 therewith. The sensing gap Gs is larger than the first auxiliary gap Gsub1 and smaller than the second auxiliary gap Gsub2, that is, the second auxiliary gap Gsub2>sensing gap Gs>the first auxiliary gap Gsub1.

It is worth mentioning that the heights of the main raising structure 214a, the sensing raising structure 214b, the second auxiliary raising structure 214c and the first auxiliary raising structure 214d can be arranged in various combinations. 2B, in this embodiment, the thickness of the main padding structure 214a on the first substrate 210>the thickness of the first auxiliary padding structure 214d>the thickness of the sensing padding structure 214b>the second auxiliary padding structure 214c thickness. In another possibility, the heights of the main raising structure 214a, the sensing raising structure 214b, the second auxiliary raising structure 214c, and the first auxiliary raising structure 214d may also be the same, or have other possible arrangements and combinations.

It is worth mentioning that the heights of the main pad structure 214a, the sensing pad structure 214b, the second auxiliary pad structure 214c, and the first auxiliary pad structure 214d are determined by the TFT metal stacking process of the first substrate 210. form. In this embodiment, the main pad structure 214a is formed by stacking the gate layer 210a, the gate insulating layer 210b, the semiconductor layer 210c, the source layer 210d and the passivation layer 210e in the TFT process. The sensing pad structure 214b is formed by stacking the gate layer 210a, the gate insulating layer 210b and the passivation layer 210e. The first auxiliary pad structure 214d is formed by stacking the gate layer 210a, the gate insulating layer 210b, the semiconductor layer 210c and the passivation layer 210e. The second auxiliary pad structure 214c is formed by stacking the gate layer 210a and the gate insulating layer 210b.

In an embodiment of the present invention, the sensing gap Gs, the first auxiliary gap Gsub1, and the second auxiliary gap Gsub2 of the sensing structure 240b, the first auxiliary support structure 240d, and the second auxiliary support structure 240c can not only use the above-mentioned The height difference of the sensing pad structure 214b, the first auxiliary pad structure 214d, and the second auxiliary pad structure 214c formed in the thin film transistor metal stacking process on the first substrate 210 is achieved, and it can be achieved by using the second substrate 220 The sensing bump 228b, the first auxiliary spacer 228d, and the height of the second auxiliary spacer 228c can be achieved by changing the heights of the above two variables, so as to achieve the second auxiliary gap Gsub2 > the sensing gap Gs > the first auxiliary spacer Gap purpose of Gsub1.

The spacers on the second substrate 220 can adopt different processes, so that the main spacer 228a, the second auxiliary spacer 228c and the first auxiliary spacer 228d can be selected to be covered by the second electrode 226 or not. Therefore, Its overall design is more flexible and diverse.

In all possible embodiments, as shown in FIGS. 2A-2B , the first electrode 216 may include a sensing electrode, the second electrode 226 may include a common electrode, and the common electrode covers all the sensing bumps 228b. The ratio of the distribution density of the first auxiliary spacer 228d to the main spacer 228a on the second substrate 220 is between 1 and 100, wherein preferably, the first auxiliary spacer 228d and the main spacer 228a are on the second substrate 220. The distribution density ratio of the substrate 220 is between 5 and 15.

FIGS. 3A to 6 respectively illustrate various possible components and implementations of the touch display panel 200 in FIG. 2B . Please refer to FIG. 2B for the basic structure and principles of the touch display panel 200 , and the common parts will not be repeated below.

Please refer to FIG. 3A and FIG. 2B at the same time. In this embodiment, the touch display panel 200 only has a second electrode 226 on the surface of the sensing bump 328b, and the main spacer 328a, the second auxiliary spacer 328c and The surface of the first auxiliary spacer 328d does not have the second electrode 226 on its surface.

In this embodiment, the first electrode 216 may include a sensing electrode, the second electrode 226 may include a common electrode, and the common electrode covers the sensing bump 328b. The ratio of the distribution density of the first auxiliary spacer 328d to the main spacer 328a on the second substrate 220 is between 1 and 100, wherein preferably, the first auxiliary spacer 328d and the main spacer 328a are on the second substrate 220. The distribution density ratio of the substrate 220 is between 3 and 50. More preferably, the distribution density ratio of the first auxiliary spacers 328d and the main spacers 328a on the second substrate 220 is between 5 and 15. .

Please refer to FIG. 3B and FIG. 2B at the same time. In this embodiment, the touch display panel 200 only has a second electrode 226 on the surface of the sensing bump 328b and the second auxiliary spacer 328c, while the main spacer 328a and the second auxiliary spacer 328c have a second electrode 226. The surface of an auxiliary spacer 328d does not contain the second electrode 226 .

In this embodiment, the first electrode 216 may include a sensing electrode, the second electrode 226 may include a common electrode, and the common electrode covers the sensing bump 328b. The ratio of the distribution density of the first auxiliary spacer 328d to the main spacer 328a on the second substrate 220 is between 1 and 100, wherein preferably, the first auxiliary spacer 328d and the main spacer 328a are on the second substrate 220. The distribution density ratio of the substrate 220 is between 3 and 50. More preferably, the distribution density ratio of the first auxiliary spacers 328d and the main spacers 328a on the second substrate 220 is between 5 and 15. .

Referring to FIG. 4 and FIG. 2B at the same time, in the present embodiment, only the surfaces of the sensing bump 428b, the second auxiliary spacer 428c and the first auxiliary spacer 428d of the touch display panel 200 have a second electrode 226, After the second electrode 226 is fabricated, the main spacer 428a is fabricated by injecting a ball spacer. Therefore, the surface of the main spacer 428a does not contain the second electrode 226.

In this embodiment, the first electrode 216 may include a sensing electrode, the second electrode 226 may include a common electrode, and the second electrode 226 covers the sensing bump 428b. The ratio of the distribution density of the first auxiliary spacer 428d to the main spacer 428a on the second substrate 220 is between 1 and 100, wherein preferably, the first auxiliary spacer 328d and the main spacer 328a are on the second substrate 220. The distribution density ratio of the substrate 220 is between 3 and 50. More preferably, the distribution density ratio of the first auxiliary spacers 428d and the main spacers 428a on the second substrate 220 is between 5 and 15. .

Please refer to FIG. 5 and FIG. 2B at the same time. In this embodiment, the touch display panel 200 only includes the second electrode 226 on the surface of the sensing bump 528b. The second auxiliary spacer 528c is produced by photolithography, and the main spacer 528a and the first auxiliary spacer 528d are produced by putting in spherical spacers. Therefore, the main spacer 528a, the first auxiliary spacer 528d and the second auxiliary spacer 528c does not contain the second electrode 226 on its surface.

In this embodiment, the first electrode 216 may include a sensing electrode, the second electrode 226 may include a common electrode, and the common electrode covers the sensing bump 528b. The ratio of the distribution density of the first auxiliary spacer 528d to the main spacer 528a on the second substrate 220 is between 1 and 100, wherein preferably, the first auxiliary spacer 328d and the main spacer 328a are on the second substrate 220. The distribution density ratio of the substrate 220 is between 3 and 50. More preferably, the distribution density ratio of the first auxiliary spacers 528d and the main spacers 528a on the second substrate 220 is between 5 and 15. .

Please refer to FIG. 6 and FIG. 2B at the same time. In this embodiment, the touch display panel 200 only includes the second electrode 226 on the surface of the sensing bump 628b and the second auxiliary spacer 628c. After the two electrodes 226, the first auxiliary spacer 628d is produced by the photolithography process of the thin film transistor, and the main spacer 628a is produced by putting in the spherical spacer, so the main spacer 628a and the first auxiliary spacer 628d are not visible on the surface. The second electrode 226 is included, and the main spacer 628a is a spherical object. In this embodiment, the second substrate 220 has a groove H corresponding to the spherical main spacer 628a for more conveniently inserting the main spacer 628a to fix the position of the main spacer 628a.

In this embodiment, the first electrode 216 may include a sensing electrode, the second electrode 226 may include a common electrode, and the common electrode covers the sensing bump 628b. The ratio of the distribution density of the first auxiliary spacer 628d to the main spacer 628a on the second substrate 220 is between 1 and 100, wherein preferably, the first auxiliary spacer 628d and the main spacer 628a are on the second substrate 220. The distribution density ratio of the substrate 220 is between 5 and 15.

In addition to the above changes, the main spacer 628a, the sensing bump 228b, the first auxiliary spacer 628d, and the second auxiliary spacer 528c can also be reversely arranged on the first substrate 210, as long as the aforementioned gap relationship of the present invention is achieved. That's it.

In summary, the display panel of the present invention has at least the following advantages. Firstly, by adding the first auxiliary spacer, the supporting strength of the aforementioned touch display panel is increased, and its withstand voltage and life are improved. Since there is no additional main spacer, the phenomenon of low-temperature liquid crystal bubbles in a low-temperature environment can be reduced, and there is no need to increase the required external force, that is, the sensitivity of touch sensing will not be reduced.

Secondly, through the multi-channel spacer process, the gap maintained between the spacer and the padding structure can not only be achieved by the height step change formed in the thin film transistor photolithography process on the first substrate, but also can be realized by using the second This is achieved by varying the height of the spacers themselves on the substrate. Therefore, its design is more flexible and diverse.

Furthermore, through the multi-channel spacer process, after the second electrode on the second substrate is fabricated, the main support or other auxiliary spacers can be fabricated on the second substrate, that is, the main support can be selectively made There is no second electrode on the spacer or other auxiliary spacers; therefore, it can effectively solve the problem of the main spacer or auxiliary spacer in the non-sensing area when the touch panel is pressed due to the displacement of the main spacer or the auxiliary spacer or the misalignment of the group. The second electrode on the object is incorrectly bridged with the first electrode below, resulting in abnormal display. Because of this, there is no need to greatly increase the distance between the electrodes in the pixel region and the main spacers in advance when designing the layout of the first substrate in order to prevent alignment errors, so the aperture ratio can be effectively improved.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of protection of the invention should be defined by the scope of the appended claims.

Claims (24)

1. A touch display panel, characterized in that, the touch display panel comprises: A first substrate, including a plurality of sensing areas and a non-sensing area outside the plurality of sensing areas, and each sensing area has a first electrode; A second substrate, located on the side of the first substrate and opposite to the first substrate, the second substrate includes: a plurality of main spacers disposed on a side of the second substrate facing the first substrate, and the plurality of main spacers are connected to the non-sensing area of the first substrate; A plurality of sensing bumps are arranged on the side of the second substrate facing the first substrate, the plurality of sensing bumps correspond to the plurality of sensing regions of the first substrate, each There is a second electrode on one of the sensing bumps, and a sensing gap is maintained between the first substrate and the second substrate at the positions of the plurality of sensing bumps; A plurality of first auxiliary spacers are arranged on the side of the second substrate facing the first substrate, the plurality of first auxiliary spacers correspond to the non-sensing area of the first substrate, and the maintaining a first auxiliary gap between the first substrate and the second substrate at the positions of the plurality of first auxiliary spacers; A plurality of second auxiliary spacers are disposed on the side of the second substrate facing the first substrate, the plurality of second auxiliary spacers correspond to the non-sensing area of the first substrate, and the The first substrate and the second substrate maintain a second auxiliary gap at the positions of the plurality of second auxiliary spacers, wherein the first auxiliary gap is smaller than the sensing gap, and the sensing gap less than the second auxiliary gap; and A liquid crystal layer is arranged between the first substrate and the second substrate. 2. The touch display panel as claimed in claim 1, wherein the first electrode comprises a sensing electrode. 3. The touch display panel according to claim 1, wherein the second electrode comprises a common electrode, and the common electrode covers the plurality of sensing bumps. 4. The touch display panel according to claim 3, wherein at least one of the plurality of main spacers, the plurality of first auxiliary spacers and the plurality of second auxiliary spacers covered by the common electrode. 5. The touch display panel according to claim 4, wherein the plurality of main spacers, the plurality of first auxiliary spacers or the plurality of second spacers covered by the common electrode The auxiliary spacers have the same height as the plurality of sensing bumps. 6. The touch display panel according to claim 3, wherein at least one of the plurality of main spacers, the plurality of first auxiliary spacers and the plurality of second auxiliary spacers on the common electrode. 7. The touch display panel according to claim 6, wherein the plurality of main spacers, the plurality of first auxiliary spacers or the plurality of second auxiliary spacers located on the common electrode The spacers have different heights from the plurality of sensing bumps. 8. The touch display panel according to claim 6, wherein the plurality of main spacers, the plurality of first auxiliary spacers or the plurality of second auxiliary spacers located on the common electrode Spacers include columnar spacers or spherical spacers. 9. The touch display panel according to claim 8, wherein the plurality of main spacers, the plurality of first auxiliary spacers or the plurality of second auxiliary spacers located on the common electrode The spacers are spherical spacers, and the second substrate has a plurality of depressions at positions corresponding to the plurality of spherical spacers, and the plurality of spherical spacers are embedded in the plurality of depressions. 10. The touch display panel as claimed in claim 3, wherein the second substrate further comprises a color filter layer located under the common electrode layer. 11. The touch display panel according to claim 10, wherein the second substrate further comprises a black matrix located under the common electrode layer. 12. The touch display panel according to claim 11, wherein the plurality of sensing bumps, the plurality of main spacers, the plurality of first auxiliary spacers and the plurality of second At least one of the two auxiliary spacers is located on the black matrix. 13. The touch display panel according to claim 1, wherein the first substrate comprises: a plurality of sensing pads, located under the plurality of first electrodes in the plurality of sensing regions, and corresponding to the plurality of sensing bumps; A plurality of main spacers are located in the non-sensing area and correspondingly connected to the plurality of main spacers; a plurality of first auxiliary spacers located in the non-sensing region and corresponding to the plurality of first auxiliary spacers; and A plurality of second auxiliary padding structures are located in the non-sensing area and correspond to the plurality of second auxiliary spacers. 14. The touch display panel according to claim 13, wherein the plurality of sensing padding structures, the plurality of main padding structures, the plurality of first auxiliary padding structures and the In the plurality of second auxiliary raising structures, the thickness of the plurality of main raising structures is greater than the thickness of the plurality of first auxiliary raising structures, and the thickness of the plurality of first auxiliary raising structures is greater than that of the plurality of auxiliary raising structures. The thickness of the plurality of sensing padding structures, and the thickness of the plurality of sensing padding structures is greater than the thickness of the plurality of second auxiliary padding structures. 15. The touch display panel according to claim 1, wherein the distribution density of the plurality of first auxiliary spacers on the second substrate is the same as that of the plurality of main spacers on the second substrate. The ratio of the distribution density is between 1 and 100. 16. The touch display panel according to claim 1, wherein the distribution density of the plurality of first auxiliary spacers on the second substrate is the same as that of the plurality of main spacers on the second substrate. The distribution density ratio on the substrate is between 5 and 15. 17. A touch display panel, characterized in that the touch display panel comprises: A first substrate, including a plurality of sensing areas and a non-sensing area outside the plurality of sensing areas, and each sensing area has a first electrode; a second substrate, located on the side of the first substrate and opposite to the first substrate; a plurality of main supporting structures, arranged in the non-sensing area, connecting the first substrate and the second base; A plurality of sensing structures disposed between the first substrate and the second substrate of the plurality of sensing regions, the plurality of sensing structures including a first electrode disposed on the first substrate one side of the second substrate, and a second electrode, disposed on one side of the second substrate, and there is a sensing gap between the first electrode and the second electrode; A plurality of first auxiliary support structures disposed between the first substrate and the second substrate in the non-sensing area, the plurality of first auxiliary support structures having a first auxiliary gap; A plurality of second auxiliary support structures are arranged between the first substrate and the second substrate in the non-sensing area, and the plurality of second auxiliary support structures have a second auxiliary gap, wherein the first an auxiliary gap is smaller than the sensing gap, and the sensing gap is smaller than the second auxiliary gap; and A liquid crystal layer is arranged between the first substrate and the second substrate. 18. The touch display panel according to claim 17, wherein the first electrode comprises a sensing electrode. 19. The touch display panel as claimed in claim 17, wherein the second electrode comprises a common electrode. 20. The touch display panel according to claim 17, wherein the main supporting structure comprises a main spacer located on one side of the first substrate, and a main raising structure located on the second side One side of the substrate, and the main spacer is in contact with the main raising structure. 21. The touch display panel according to claim 17, wherein the first auxiliary support structure comprises a first auxiliary spacer located on one side of the first substrate, and a first auxiliary spacer The structure is located on one side of the second substrate, and there is the first auxiliary gap between the first auxiliary spacer and the first auxiliary raising structure. 22. The touch display panel according to claim 17, wherein the sensing structure comprises a sensing bump disposed between the first electrode and the first substrate, and a sensing The pad structure is disposed between the second electrode and the second substrate. 23. The touch display panel according to claim 17, wherein the second auxiliary support structure comprises a second auxiliary spacer located on one side of the first substrate, and a second auxiliary spacer The structure is located on one side of the second substrate, and there is the second auxiliary gap between the second auxiliary spacer and the second auxiliary raising structure. 24. A touch display panel, characterized in that the touch display panel comprises: A first substrate, including a plurality of sensing areas and a non-sensing area outside the plurality of sensing areas, and each sensing area has a first electrode; a second substrate, located on the side of the first substrate and opposite to the first substrate; a plurality of main support structures, arranged in the non-sensing area, connecting the first substrate and the second substrate; A plurality of sensing structures disposed between the first substrate and the second substrate of the plurality of sensing regions, the plurality of sensing structures including a first electrode disposed on the first substrate one side of the second substrate, and a second electrode, disposed on one side of the second substrate, and there is a sensing gap between the first electrode and the second electrode; A plurality of first auxiliary support structures disposed between the first substrate and the second substrate in the non-sensing area, the plurality of first auxiliary support structures having a first auxiliary gap; and A plurality of second auxiliary support structures are arranged between the first substrate and the second substrate in the non-sensing area, and the plurality of second auxiliary support structures have a second auxiliary gap, wherein the first The auxiliary gap is smaller than the sensing gap, and the sensing gap is smaller than the second auxiliary gap.

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