CN109830499B - Touch control display device - Google Patents
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- CN109830499B CN109830499B CN201910093029.1A CN201910093029A CN109830499B CN 109830499 B CN109830499 B CN 109830499B CN 201910093029 A CN201910093029 A CN 201910093029A CN 109830499 B CN109830499 B CN 109830499B
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- 239000000758 substrate Substances 0.000 claims abstract description 55
- 239000004065 semiconductor Substances 0.000 claims abstract description 35
- 238000000926 separation method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 98
- 239000011229 interlayer Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
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Abstract
A touch display device comprises a substrate, a light emitting diode, a touch sensing electrode and a driving control element. The light emitting diode is arranged on the substrate and comprises a first type semiconductor layer, a light emitting layer and a second type semiconductor layer, wherein the light emitting layer is arranged between the first type semiconductor layer and the second type semiconductor layer, and the first type semiconductor layer and the second type semiconductor layer are respectively and electrically connected to the first electrode and the second electrode. The touch sensing electrode is arranged on the substrate. The driving control element is disposed on the substrate, wherein the first electrode is electrically connected to the driving control element. In the vertical projection on the substrate, a first distance is formed between the first electrode and the touch sensing electrode, a second distance is formed between the second electrode and the touch sensing electrode, and the second distance is smaller than the first distance.
Description
Technical Field
The present disclosure relates to a touch display device, and more particularly, to a touch display device with light emitting diodes.
Background
In recent years, the demand for touch display devices has increased, and research on the touch display devices has been advanced. Despite the many developments in the field of current touch display devices, there are still many different problems to overcome. For example, in a touch display device having light emitting diodes, the anode of the light emitting diode may generate noise and interference with the touch sensing electrode.
Therefore, there is still a need to develop a touch display device that is less susceptible to the interference of the touch sensing electrodes when the anodes of the light emitting diodes are driven or the touch sensing electrodes are less affected by the display signals of the light emitting diodes.
Disclosure of Invention
The invention relates to a touch display device. The touch display device can reduce the signal interference of the anode of the light emitting diode to the touch sensing electrode or enable the touch sensing electrode to be less influenced by the display signal of the light emitting diode.
The invention provides a touch display device. The touch display device comprises a substrate, a light emitting diode, a touch sensing electrode and a driving control element. The light emitting diode is arranged on the substrate and comprises a first type semiconductor layer, a light emitting layer and a second type semiconductor layer, wherein the light emitting layer is arranged between the first type semiconductor layer and the second type semiconductor layer, and the first type semiconductor layer and the second type semiconductor layer are respectively and electrically connected to the first electrode and the second electrode. The touch sensing electrode is arranged on the substrate. The driving control element is disposed on the substrate, wherein the first electrode is electrically connected to the driving control element. In the vertical projection on the substrate, a first distance is formed between the first electrode and the touch sensing electrode, a second distance is formed between the second electrode and the touch sensing electrode, and the second distance is smaller than the first distance.
In order to better understand the above and other aspects of the present invention, the following detailed description of the embodiments is made with reference to the accompanying drawings:
drawings
Fig. 1A shows a top view of a touch display device according to a first embodiment of the invention.
FIG. 1B shows a cross-sectional view taken along line A-A' of FIG. 1A.
Fig. 2A shows a top view of a touch display device according to a second embodiment of the invention.
Fig. 2B shows a cross-sectional view along the line a-a' of fig. 2A.
Fig. 3A shows a top view of a touch display device according to a third embodiment of the invention.
Fig. 3B shows a cross-sectional view along the line a-a' of fig. 3A.
Fig. 4A shows a top view of a touch display device according to a fourth embodiment of the invention.
Fig. 4B shows a cross-sectional view along the line a-a' of fig. 4A.
Fig. 5A shows a top view of a touch display device according to a fifth embodiment of the invention.
Fig. 5B shows a cross-sectional view along the line a-a' of fig. 5A.
Fig. 6A shows a top view of a touch display device according to a sixth embodiment of the invention.
Fig. 6B shows a cross-sectional view along the line a-a' of fig. 6A.
Fig. 7A shows a top view of a touch display device according to a seventh embodiment of the invention.
Fig. 7B shows a cross-sectional view along the line B-B' of fig. 7A.
Fig. 8A shows a top view of a touch display device according to an eighth embodiment of the invention.
Fig. 8B shows a cross-sectional view along the line B-B' of fig. 8A.
Fig. 9 is a top view of a touch display device according to a ninth embodiment of the invention.
Description of reference numerals:
10. 20, 30, 40, 50, 60, 70, 80, 90: touch control display device
100: substrate
102: buffer layer
104: interlayer insulating layer
106: gate insulating layer
106a, 108a, 112 a: upper surface of
108: planarization layer
110: protrusion structure
112: filling layer
114. 314, 414, 514, 614, 714, 914: touch sensing electrode
120: drive control element
122: active layer
124: grid electrode
126: source electrode
128: drain electrode
131. 231, 331, 431, 531, 631, 731, 931: a first electrode
133. 733, 833: first contact electrode
135. 735, 835, 935: light emitting diode
137. 737, 837: second contact electrode
139. 239, 339, 439, 539, 639, 739, 939: second electrode
140: opening of the container
140 a: the first part
140 b: the second part
140 c: third part
341. 841: extension electrode
441. 641: shielding electrode
339 a: proximal end
339 b: distal end
1351. 7351, 8351: first type semiconductor layer
1352: luminescent layer
1353. 7353, 8353: second type semiconductor layer
3391. 8391: body part
3392. 8392: connecting part
5141: driving electrode
5142: receiving electrode
A. A ', B, B': profile wire end point
D1、D2、D3、D4、D5、D31、D32、D61、D62: distance between two adjacent plates
D63: height
PX: light-emitting element arrangement region
Detailed Description
Fig. 1A shows a top view of a touch display device 10 according to a first embodiment of the invention. FIG. 1B shows a cross-sectional view taken along line A-A' of FIG. 1A. FIG. 1A shows a plane formed by the X-axis and the Y-axis. FIG. 1B shows the plane formed by the Y-axis and the Z-axis. The X, Y and Z axes may be orthogonal to each other.
Referring to fig. 1A and fig. 1B, the touch display device 10 includes a substrate 100, a buffer layer 102, an interlayer insulating layer 104, a gate insulating layer 106, a planarization layer 108, a protrusion structure 110, a filling layer 112, a touch sensing electrode 114, a driving control element 120, a first electrode 131, a first contact electrode 133, a light emitting diode 135, a second contact electrode 137, and a second electrode 139. The buffer layer 102, the interlayer insulating layer 104, the gate insulating layer 106, and the planarization layer 108 may be sequentially stacked on the substrate 100. The protruding structures 110 are located on the planarization layer 108, and the filling layer 112 is located in the openings between the protruding structures 110. The driving control element 120 is located on the buffer layer 102. The driving control element 120 is an element capable of controlling and adjusting, and may be, for example, a transistor or an integrated circuit, but not limited thereto. In the present embodiment, the driving control element 120 includes an active layer 122, a gate electrode 124, a source electrode 126 and a drain electrode 128. The active layer 122 is located on the buffer layer 102. The gate electrode 124 is located on the interlayer insulating layer 104 and covered by the gate insulating layer 106. The source electrode 126 and the drain electrode 128 are formed on the gate insulating layer 106, respectively, and pass through the gate insulating layer 106 and the interlayer insulating layer 104 to be electrically connected to the active layer 122. In addition to the design of the top gate electrode 124 in this embodiment, in other embodiments, the relative positions of the elements in the driving control element 120 may also be varied, for example, the relative position of the gate electrode 124 may also be located below the source electrode 126 and the drain electrode 128, which represents a control manner of the bottom gate electrode 124. The driving control element 120 may be an amorphous silicon semiconductor switch (a-Si TFT), a low temperature polysilicon semiconductor switch (LTPS TFT), an Oxide semiconductor switch (Oxide TFT), or the like, but is not limited thereto. The first electrode 131 is formed on the upper surface 108a of the planarization layer 108, passes through the planarization layer 108, and is electrically connected to the driving control device 120 (e.g., directly contacts the drain electrode 128). The second electrodes 139 and the touch sensing electrodes 114 are disposed on the substrate 100 and located on the same plane (i.e., both located on the upper surface 112a of the filling layer 112). The light emitting diode 135 is disposed on the substrate 100 and embedded in the filling layer 112. The led 135 includes a first type semiconductor layer 1351, a light emitting layer 1352 and a second type semiconductor layer 1353, the light emitting layer 1352 is disposed between the first type semiconductor layer 1351 and the second type semiconductor layer 1352, and the first type semiconductor layer 1351 and the second type semiconductor layer 1352 are electrically connected to the first electrode 131 and the second electrode 139 through the first contact electrode 133 and the second contact electrode 137, respectively. In the Z-axis direction, the first electrode 131 is closer to the substrate 100 than the second electrode 139, and is further away from the viewing surface of the user with respect to the touch display device 10. The touch display device 10 may include a plurality of light emitting element arrangement regions PX. The light emitting element arrangement region PX may be defined by the protrusion structure 110.
In an embodiment, the substrate 100 may be a rigid glass substrate, a flexible glass substrate, or a polymer substrate, and may be transparent, translucent, or opaque. The buffer layer 102, the interlayer insulating layer 104, the gate insulating layer 106, the planarization layer 108, the protrusion structure 110, and the filling layer 112 may be insulating materials, respectively. The buffer layer 102 and the interlayer insulating layer 104 may include an inorganic material or an organic material, respectively, and may be a single layer or a plurality of layers. The gate insulating layer 106, the planarization layer 108, and the protrusion structure 110 may respectively include inorganic materials. The fill layer 114 may comprise an organic material. The source electrode 126, the drain electrode 128, the first electrode 131, the second electrode 139 and the touch sensing electrode 114 may be the same or different metal materials or transparent conductive materials, respectively. The active layer 122 may be an organic semiconductor, an inorganic semiconductor, or an amorphous silicon material. In one embodiment, the second electrode 139 and the touch sensing electrode 114 may have the same material and thickness.
In the present embodiment, in a single light emitting device arrangement region PX, an area of the first electrode 131 vertically projected on the substrate 100 is smaller than an area of the second electrode 139 vertically projected on the substrate 100. In a vertical projection on the substrate 100, a first distance D exists between the first electrode 131 and the touch sensing electrode 1141(i.e. the shortest distance between the first electrode 131 and the touch sensing electrode 114 in the vertical projection on the substrate 100), in the extending direction of the shortest distance between the first electrode 131 and the touch sensing electrode 114, the second electrode 139 has a second distance D with respect to the touch sensing electrode 1142The second electrode 139 has a third distance D protruding from the first electrode 1313. Second distance D2May be less than the first distance D1. Third distance D3May be equal to or less than the second distance D2. Third distance D3And may be greater than 2 microns. Second distance D2It can be larger than 2 microns, preferably larger than 5 microns. In this embodiment, the first electrode 131 can be an anode, and the second electrode 139 can be a cathode. The second electrode 139 may have a fixed voltage (e.g., a dc voltage). Compared with the comparative example in which the second distance is greater than the first distance, the second distance D of the present embodiment is larger than the first distance2Less than the first distance D1The second electrode 139 with a fixed voltage can add a parallel power line signal between the first electrode 131 and the touch sensing electrode 114 to generate a power shield, thereby reducing the interference caused by the first electrode 131 to the touch sensing electrode 114.
Fig. 2A shows a top view of a touch display device 20 according to a second embodiment of the invention. Fig. 2B shows a cross-sectional view along the line a-a' of fig. 2A. Fig. 2A shows a plane formed by the X-axis and the Y-axis. Fig. 2B shows a plane formed by the Y-axis and the Z-axis. The X, Y and Z axes may be orthogonal to each other. The touch display device 20 of fig. 2A-2B is similar to the touch display device 10 of fig. 1A-1B, except that the second electrode 239 of the touch display device 20 has an opening 140, and the other repetition points are not described in detail.
Referring to fig. 2A and fig. 2B, the second electrode 239 and the touch sensing electrode 114 are located on the same plane, that is, both are located on the upper surface 112A of the insulating layer (the filling layer 112). The opening 140 partially surrounds the led 135 in vertical projection on the substrate 100. In the present embodiment, the opening 140 has an inverted U-shape. The opening 140 includes a first portion 140a, a second portion 140b, and a third portion 140c that communicate with each other. The first portion 140a, the second portion 140b, and the third portion 140c may correspond to three sides of the first electrode 131, the first portion 140a is opposite to the third portion 140c, and the second portion 140b is connected to the first portion 140a and the third portion 140 c. In fig. 2B, the second portion 140B may correspond to a side of the light emitting diode 135 or the first electrode 131 far away from the touch sensing electrode 114.
Similar to the touch display device 10, the area of the first electrode 131 vertically projected on the substrate 100 is smaller than the area of the second electrode 239 vertically projected on the substrate 100. In a vertical projection on the substrate 100, a first distance D exists between the first electrode 131 and the touch sensing electrode 1141(i.e. the shortest distance between the first electrode 131 and the touch sensing electrode 114 in the vertical projection on the substrate 100), in the extending direction of the shortest distance between the first electrode 131 and the touch sensing electrode 114, the second electrode 239 and the touch sensing electrode 114 have a second distance D2(in this example, the second distance D2Also the shortest distance between the second electrode 239 and the touch sensing electrode 114 in the vertical projection on the substrate 100), the second electrode 239 has a third distance D protruding from the first electrode 1313. Second distance D2May be less than the first distance D1. Third distance D3May be equal to or less thanSecond distance D2. Third distance D3And may be greater than 2 microns. Second distance D2And may be greater than 2 microns, or greater than 5 microns. In this embodiment, the first electrode 131 can be an anode, and the second electrode 239 can be a cathode. The second electrode 239 may have a fixed voltage (e.g., a dc voltage). Compared with the comparative example in which the second distance is greater than the first distance, the second distance D of the present embodiment is larger than the first distance2Less than the first distance D1The second electrode 239 with a fixed voltage can add a parallel power line signal between the first electrode 131 and the touch sensing electrode 114 to generate a power shield, thereby reducing the interference of the first electrode 131 to the touch sensing electrode 114. In addition, compared to the touch display device 10, the touch display device 20 has the opening 140 in the second electrode 239, which can provide the light emitting diode 135 with higher transmittance, i.e., better light output effect.
Fig. 3A shows a top view of a touch display device 30 according to a third embodiment of the invention. Fig. 3B shows a cross-sectional view along the line a-a' of fig. 3A. Fig. 3A shows a plane formed by the X-axis and the Y-axis. Fig. 3B shows a plane formed by the Y-axis and the Z-axis. The X, Y and Z axes may be orthogonal to each other. The touch display device 30 of fig. 3A-3B is similar to the touch display device 10 of fig. 1A-1B, except that the second electrode 339 and the touch sensing electrode 314 of the touch display device 30 are configured to further include an extension electrode 341, and other repetition points are not described in detail herein.
Referring to fig. 3A and 3B, the second electrode 339 includes a main portion 3391 and a connecting portion 3392. The body portion 3391 of the second electrode 339 may be disposed on the upper surface 112a of the insulating layer (the filling layer 112). The extension electrode 341, the first electrode 131, and the touch sensing electrode 314 may be disposed on the upper surface 108a of the planarization layer 108 and separated from each other. The insulating layer (filling layer 112) covers the extension electrode 341, the first electrode 131, and the touch sensing electrode 314. The connecting portion 3392 of the second electrode 339 can pass through the filling layer 112 from the body portion 3391 and be electrically connected to the extended electrode 341 (e.g., directly contacted). In the vertical projection on the substrate 100, the extension electrode 341 surrounds the first electrode 131 and the light emitting diode 135, wherein the surrounding includes complete surrounding and partial surrounding, and the arrangement of the first electrode 131 and the touch sensing electrode 314 is mainly adjusted. The extension electrode 341 may be located between the first electrode 464 and the touch sensing electrode 314. The extension electrode 341 may be a closed loop structure, such as a rectangle formed by 4 sides; in addition, the extension electrode 341 is correspondingly disposed according to the relative position of the touch sensing electrode 314, so the extension electrode 341 can also be a non-closed ring structure with an opening. The second electrode 339 may cover a portion of the extension electrode 341 (e.g., one of the 4 sides covering the extension electrode 341) and expose the other portion of the extension electrode 341 (e.g., 3 of the 4 sides exposing the extension electrode 341). However, the invention is not limited thereto, and the second electrode 339 may cover 2 sides or 3 sides of the portion of the extension electrode 341.
The body portion 3391 of the second electrode 339 has a proximal end 339a close to the touch sensing electrode 314 and a distal end 339b far from the touch sensing electrode 314, the second electrode 339 at the proximal end 339a overlaps the extension electrode 341 in the Z-axis direction, and the second electrode 339 at the distal end 339b does not overlap the extension electrode 341 in the Z-axis direction. Viewed from another perspective, the distance between the second electrode 339 at the distal end 339b and the light emitting diode 135 is smaller than the distance between the second electrode 339 at the proximal end 339a and the light emitting diode 135. The second electrode 339 at the distal end 339b may provide more light-transmitting space for the led 135 than the second electrode 339 at the proximal end 339 a.
In the embodiment, the first electrode 131 has a first voltage V1, the extension electrode 341 has a second voltage V2, the touch sensing electrode 314 has a third voltage V3, the first voltage V1 is greater than the second voltage V2, and the third voltage V3 is greater than the second voltage V2. The connection portion 3392 can conduct the current of the main body portion 3391 down to the extension electrode 341, so that the light shielding of the upper main body portion 3391 to the light emitting diode 135 is reduced, and the extension electrode 341 is utilized to generate power shielding, thereby reducing the interference of the first electrode 131 to the touch sensing electrode 314 or the interference of the touch sensing electrode 314 to the first electrode 131. The extension electrode 341 and the second electrode 339 may have an equipotential with a fixed voltage (e.g., a dc voltage). The extension electrode 341 can form a stable voltage protection at the outer circumference of the first electrode 131.
Similar to the touch display device 10, the area of the first electrode 131 vertically projected on the substrate 100 is smaller than the area of the second electrode 339 vertically projected on the substrate 100. In a vertical projection on the substrate 100, a first distance D exists between the first electrode 131 and the touch sensing electrode 3141A second distance D exists between the second electrode 339 and the touch sensing electrode 3142The second electrode 339 has a third distance D protruding from the first electrode 1313. Second distance D2May be less than the first distance D1. Third distance D3May be equal to or less than the second distance D2. Third distance D3And may be greater than 2 microns. Second distance D2And may be greater than 2 microns, or more preferably greater than 5 microns. In this embodiment, the first electrode 131 may serve as an anode, and the second electrode 339 may serve as a cathode.
Compared with the comparative example in which the second distance is greater than the first distance, the second distance D of the present embodiment is larger than the first distance2Less than the first distance D1The second electrode 339 and/or the extension electrode 341 with a fixed voltage can add a parallel power line signal between the first electrode 131 and the touch sensing electrode 314 to generate a power shield, thereby reducing interference caused by the first electrode 131 to the touch sensing electrode 314. Moreover, compared to the touch display device 10, since the distance between the second electrode 339 at the far end 339b and the light emitting diode 135 is smaller than the distance between the second electrode 339 at the near end 339a and the light emitting diode 135, at least one side of the second electrode 339 can provide more light-transmitting space for the light emitting diode 135, so as to provide higher light transmittance for the light emitting diode 135, i.e., better light extraction effect. Furthermore, compared to the embodiment of the touch display device 10, since the embodiment further includes the extension electrode 341 in addition to the second electrode 339, the extension electrode 341 can provide a more stable voltage protection effect. In addition, compared to the embodiment of the touch display device 10, since the insulating layer (the filling layer 112) of the embodiment has only the second electrode 339 but no touch sensing electrode 314, the upper layer (above the filling layer 112) has fewer traces and is patterned moreSimple, and has more space for other design purposes.
Fig. 4A shows a top view of a touch display device 40 according to a fourth embodiment of the invention. Fig. 4B shows a cross-sectional view along the line a-a' of fig. 4A. Fig. 4A shows a plane formed by the X axis and the Y axis. Fig. 4B shows a plane formed by the Y axis and the Z axis. The X, Y and Z axes may be orthogonal to each other. The touch display device 40 of fig. 4A-4B is similar to the touch display device 10 of fig. 1A-1B, except that a shielding electrode 441 is further included around the second electrode 439 of the touch display device 40, and the other repetition points are not described in detail herein.
Referring to fig. 4A and 4B, the second electrode 439 and the shielding electrode 441 may be disposed on the same plane, for example, both disposed on the upper surface 112a of the filling layer 112. The second electrode 439 and the shielding electrode 441 are spaced apart from each other and have different voltages. For example, the second electrode 439 and the shielding electrode 441 may have different magnitudes of dc voltages. The shielding electrode 441 may be disposed between the second electrode 439 and the touch sensing electrode 414. Therefore, the shielding electrode 441 can provide a more stable voltage protection effect compared to the embodiment of the touch display device 10 shown in fig. 1A to 1B.
Fig. 5A shows a top view of a touch display device 50 according to a fifth embodiment of the invention. Fig. 5B shows a cross-sectional view along the line a-a' of fig. 5A. Fig. 5A shows a plane formed by the X axis and the Y axis. Fig. 5B shows a plane formed by the Y axis and the Z axis. The X, Y and Z axes may be orthogonal to each other. The touch display device 50 of fig. 5A-5B is similar to the touch display device 10 of fig. 1A-1B, except that the second electrode 539 of the touch display device 50 has a different protruding distance relative to the first electrode on the side adjacent to the driving electrode 5141 of the touch sensing electrode 514 and on the side adjacent to the receiving electrode 5142, and further details are omitted here.
Referring to fig. 5A and 5B, the touch sensing electrode 514 includes a driving electrode 5141 and a receiving electrode 5142, for example, the voltages of the two electrodes are different. The second electrode 539 is located on the same plane as the touch sensing electrode 514. That is, the second electrode 539, the driving electrode 5141, and the receiving electrode 5142 are all on the upper surface 112a of the fill layer 112. Also, the second electrode 539 is positioned between the driving electrode 5141 and the receiving electrode 5142. In a vertical projection on the substrate 100, the second electrode 539 adjacent to the side of the driving electrode 5141 has a first protrusion distance D with respect to the first electrode 13131And a second electrode 539 adjacent to a side of the receiving electrode 5142 having a second projection distance D32First protrusion distance D31Greater than the second protrusion distance D32. The first electrode 131 and the driving electrode 5141 have a distance D therebetween4And is spaced apart from receiving electrode 5142 by a distance D1. Distance D1Greater than the distance D4. The second electrode 539 is spaced apart from the driving electrode 5141 by a distance D5And is spaced apart from receiving electrode 5142 by a distance D2. Distance D5And a distance D2May be the same. Since the first electrode 131 interferes the receiving electrode 5142 to a greater degree than the receiving electrode 5141, the second electrode 539 is designed to have a first protrusion distance D with respect to the first electrode 13131Greater than the second protrusion distance D32So that the second electrode 539 can provide more protection on the side adjacent to the receiving electrode 5141 to prevent the receiving electrode 5142 from being interfered by the first electrode 131.
Fig. 6A shows a top view of a touch display device 60 according to a sixth embodiment of the invention. Fig. 6B shows a cross-sectional view along the line a-a' of fig. 6A. Fig. 6A shows a plane formed by the X axis and the Y axis. Fig. 6B shows a plane formed by the Y axis and the Z axis. The X, Y and Z axes may be orthogonal to each other. The touch display device 60 of fig. 6A-6B is similar to the touch display device 10 of fig. 1A-1B, except that the touch sensing electrode 614 of the touch display device 60 is configured to further include a shielding electrode 641, and the other repetition points are not described in detail herein.
Referring to fig. 6A and fig. 6B, the shielding electrode 641, the first electrode 131 and the touch sensing electrode 614 may be disposed on the same plane, that is, disposed on the upper surface 108a of the planarization layer 108 and separated from each other. The insulating layer (filling layer 112) covers the shielding electrode 641, the first electrode 131 and the touch sensing electrode 614. Shielding electricity in a vertical projection on the substrate 100The electrode 641 partially overlaps with the second electrode 639. The shielding electrode 641 surrounds the first electrode 131 and the light emitting diode 135. The shielding electrode 641 may be located between the first electrode 131 and the touch sensing electrode 614. The shielding electrode 641 may be a ring-shaped electrode, such as a rectangle formed by 4 sides. In the vertical projection of the substrate 100, the shielding electrode 641 and the first electrode 131 have a separation distance D therebetween61The shielding electrode 641 and the second electrode 639 have an overlapping width D62(and separation distance D)61Overlapping width on the same vertical plane), the first electrode 131 and the second electrode 639 have a vertical height D therebetween63Separation distance D61Greater than or equal to vertical height D63And overlap width D62Greater than or equal to vertical height D63. Separation distance D61And the overlapping width D62Respectively, may be greater than 2 microns.
In the embodiment, the first electrode 131 has a first voltage V4, the second electrode 639 has a second voltage V5, the touch sensing electrode 614 has a third voltage V6, and the shielding electrode 641 has a fourth voltage V7, wherein the fourth voltage V7 is respectively greater than the first voltage V4, the second voltage V5, and the third voltage V6. The first voltage V4 may be approximately the third voltage V6. The second voltage V5 may be less than the first voltage V4 and the third voltage V6, respectively. Since the shielding electrode 641 provides a higher voltage, a larger electric field can be established to block the interference signal between the first electrode 131 and the touch sensing electrode 614.
Compared to the embodiment of the touch display device 10, since the embodiment further includes the shielding electrode 641 in addition to the second electrode 639, the shielding electrode 641 provides a stronger voltage protection effect. In addition, compared to the embodiment of the touch display device 10, since the insulating layer (the filling layer 112) of the embodiment has only the second electrode 339 but no touch sensing electrode 614, the upper layer (above the filling layer 112) has fewer traces, simpler patterning, and more space for other design purposes.
Fig. 7A shows a top view of a touch display device 70 according to a seventh embodiment of the invention. Fig. 7B shows a cross-sectional view along the line B-B' of fig. 7A. Fig. 7A shows a plane formed by the X axis and the Y axis. Fig. 7B shows a plane formed by the Y axis and the Z axis. The X, Y and Z axes may be orthogonal to each other. The touch display device 70 of fig. 7A-7B is similar to the touch display device 10 of fig. 1A-1B, except that the type of the light emitting diode 735 of the touch display device 70 and the corresponding configurations of the first electrode 731 and the second electrode 739 are different, and the other repetition points are not described in detail herein.
Referring to fig. 7A and fig. 7B, the light emitting diode 735 of the touch display device 70 is a flip-chip light emitting diode. The light-emitting layer 7352 is provided between the first type semiconductor layer 7351 and the second type semiconductor layer 7353. That is, the first contact electrode 733 and the second contact electrode 737 of the led 735 correspond to the same surface of the light-emitting layer 7352, and both the first contact electrode 733 and the second contact electrode 737 are located on a surface close to the substrate 100. The first contact electrode 733 and the second contact electrode 737 electrically connect the first type semiconductor layer 7351 and the second type semiconductor layer 7353 to the first electrode 731 and the second electrode 739, respectively. The first electrode 731, the second electrode 739, and the touch sensing electrode 714 are all located on the same plane (e.g., all formed on the upper surface 108 of the planarization layer 108) and are spaced apart from each other in the Y-axis direction. The first electrode 731 and the second electrode 739 are located on the same side of the light-emitting layer 7352. The first electrode 731 may be located between the second electrode 739 and the touch sensing electrode 714. The second electrode 739 surrounds the light emitting diode 735 and the first electrode 731. The first electrode 731 can have a first voltage V8, the second electrode 739 can have a second voltage V9, and the first voltage V8 can be greater than the second voltage V9. The first electrode 731 can be an anode electrically contacting the driving control element 120. The second electrode 739 may have a fixed voltage (e.g., a direct current voltage). Therefore, the second electrode 739 can increase the parallel power line signal between the first electrode 731 and the touch sensing electrode 714 to generate a power shielding, thereby reducing the interference caused by the first electrode 731 on the touch sensing electrode 714.
Fig. 8A shows a top view of a touch display device according to an eighth embodiment of the invention. Fig. 8B shows a cross-sectional view along the line B-B' of fig. 8A. Fig. 8A shows a plane formed by the X axis and the Y axis.
Fig. 8B shows a plane formed by the Y axis and the Z axis. The X, Y and Z axes may be orthogonal to each other. The touch display device 80 shown in fig. 8A-8B is similar to the touch display device 70 shown in fig. 7A-7B, except that the touch display device 80 further includes an extension electrode 841 and the configuration of the second electrode 8392 is similar to that shown in fig. 7A-7B.
Referring to fig. 8A and 8B, the second electrode 839 includes a body portion 8391 and a connecting portion 8392. The body portion 8391, the first electrode 831, and the touch sensing electrode 814 of the second electrode 839 can be disposed on the same plane, for example, on the upper surface 108a of the planarization layer 108 and separated from each other. The insulating layer (the filling layer 112) covers the body portion 8391, the first electrode 831, and the touch sensing electrode 814. The connection portion 8392 of the second electrode 839 may pass through the filling layer 112 from the body portion 8391 and be electrically connected to the extension electrode 841 (e.g., directly contacted). The second electrode 839 and the extension electrode 841 are disposed on different layers. The extension electrode 841 may be formed on the same plane as the source electrode 126 and the drain electrode 128, for example, both formed on the upper surface 106a of the gate insulation layer 106. In a vertical projection on the substrate 100, the extension electrode 841 surrounds the first electrode 831 and the light emitting diode 835. The extension electrode 841 may be located between the first electrode 831 and the touch sensing electrode 814. The extension electrode 841 can be a closed ring structure, but not limited thereto. Since the extension electrode 841 and the second electrode 839 are formed in different layers, the extension electrode 841 has less influence on the resolution. The extension electrode 841 and the second electrode 839 may have an equipotential and have a fixed voltage (e.g., a dc voltage). The extension electrode 841 can form stable voltage protection at the outer circumference of the first electrode 831. The extension electrode 841 and the second electrode 839 may have an equipotential and have a fixed voltage (e.g., a dc voltage). Therefore, compared to the touch display device 70, the touch display device 80 further includes the extension electrode 841, so that the voltage stabilization effect is better.
Fig. 9 is a top view of a touch display device 90 according to a ninth embodiment of the invention, which shows a plane formed by an X axis and a Y axis. The touch display device 90 may be similar to the touch display devices 10-80, and shows an embodiment in which 3 light emitting diodes 935 are arranged in one light emitting element arrangement area PX, but the disclosure is not limited thereto.
Referring to fig. 9, a light emitting device arrangement area PX includes 3 light emitting diodes 935, and the main colors of the 3 light emitting diodes 935 may be red, green, and blue, respectively. The first electrodes 931 corresponding to the 3 light emitting diodes 935 may be separated from each other, and the second electrodes 939 corresponding to the light emitting diodes may be commonly connected. That is, the second electrode 939 is a common electrode of the 3 light emitting diodes 935. The area of the first electrode 931 vertically projected on the substrate 100 is smaller than the area of the second electrode 939 vertically projected on the substrate 100. In a vertical projection on the substrate 100, a first distance D exists between the first electrode 931 and the touch sensing electrode 9141In the extending direction of the shortest distance between the first electrode 931 and the touch sensing electrode 914, a second distance D exists between the second electrode 939 and the touch sensing electrode 9142The second electrode 939 has a third distance D protruding from the first electrode 9313. Second distance D2May be less than the first distance D1. Third distance D3May be equal to or less than the second distance D2。
Since the area of the second electrode of the touch display device is larger than that of the first electrode, and in the vertical projection on the substrate, the first distance between the first electrode and the touch sensing electrode is larger than the second distance between the second electrode and the touch sensing electrode. In other words, the second electrode protrudes from the first electrode, and is closer to the touch sensing electrode than the first electrode. Therefore, compared with the comparative example in which the second distance is greater than the first distance, the second electrode of the present invention can increase the parallel electric line signals between the first electrode and the touch sensing electrode, so as to generate an electric shielding, thereby reducing the interference of the first electrode to the touch sensing electrode.
While the present invention has been described with reference to the above embodiments, it is not intended to be limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (20)
1. A touch display device, comprising:
a substrate;
the light emitting diode is arranged on the substrate and comprises a first type semiconductor layer, a light emitting layer and a second type semiconductor layer, wherein the light emitting layer is arranged between the first type semiconductor layer and the second type semiconductor layer, and the first type semiconductor layer and the second type semiconductor layer are respectively and electrically connected with a first electrode and a second electrode;
a touch sensing electrode disposed on the substrate; and
a drive control element disposed on the substrate, wherein the first electrode is electrically connected to the drive control element;
in a vertical projection on the substrate in the configuration area of each light emitting diode, a first distance is formed between the first electrode and the touch sensing electrode, the first distance extends from the first electrode to the touch sensing electrode in an extending direction, a second distance is formed between the second electrode and the touch sensing electrode, and the second distance is smaller than the first distance.
2. The touch display device of claim 1, wherein the second electrode and the touch sensing electrode are made of the same material and have the same thickness.
3. The touch display device of claim 1, wherein the area of the second electrode vertically projected on the substrate is larger than the area of the first electrode vertically projected on the substrate, and the second electrode has an opening.
4. The touch display device of claim 3, wherein the opening surrounds the light emitting diode.
5. The touch display device of claim 1, further comprising an extension electrode electrically connected to the second electrode, the extension electrode and the second electrode being disposed on different planes, the extension electrode and the touch sensing electrode being disposed on a same plane.
6. The touch display device of claim 5, further comprising an insulating layer disposed on the substrate, wherein the light emitting diode is embedded in the insulating layer, wherein the second electrode is disposed on an upper surface of the insulating layer, and the insulating layer covers the extension electrode, the first electrode, and the touch sensing electrode.
7. The touch display device of claim 5, further comprising a first insulating layer disposed on the substrate and a second insulating layer disposed on the first insulating layer, wherein the light emitting diode is embedded in the second insulating layer, wherein the second electrode is disposed on an upper surface of the second insulating layer, and the extension electrode, the first electrode and the touch sensing electrode are disposed on an upper surface of the first insulating layer.
8. The touch display device of claim 5, wherein the extension electrode surrounds the first electrode and the light emitting diode.
9. The touch display device of claim 5, wherein the extension electrode is located between the first electrode and the touch sensing electrode.
10. The touch display device of claim 5, wherein the first electrode has a first voltage, the extension electrode has a second voltage, the touch sensing electrode has a third voltage, the first voltage is greater than the second voltage, and the third voltage is greater than the second voltage.
11. The touch display device of claim 1, wherein the touch sensing electrode comprises a driving electrode and a receiving electrode, the second electrode is located on the same plane as the touch sensing electrode, and the second electrode is located between the driving electrode and the receiving electrode,
in the vertical projection on the substrate, the second electrode adjacent to the driving electrode has a first protruding distance relative to the first electrode and the second electrode adjacent to the receiving electrode has a second protruding distance, and the first protruding distance is greater than the second protruding distance.
12. The touch display device of claim 1, further comprising a shielding electrode disposed between the first electrode and the touch sensing electrode, wherein the shielding electrode partially overlaps the second electrode in the vertical projection on the substrate.
13. The touch display device of claim 12, further comprising an insulating layer disposed on the substrate, wherein the light emitting diode is embedded in the insulating layer, wherein the second electrode is disposed on an upper surface of the insulating layer, and the insulating layer covers the shielding electrode, the first electrode, and the touch sensing electrode.
14. The touch display device of claim 12, wherein the first electrode has a first voltage, the second electrode has a second voltage, the touch sensing electrode has a third voltage, and the shielding electrode has a fourth voltage, wherein the fourth voltage is greater than the first voltage, the second voltage, and the third voltage, respectively.
15. The touch display device of claim 12, wherein in the vertical projection of the substrate, a separation distance is provided between the shielding electrode and the first electrode, an overlap width is provided between the shielding electrode and the second electrode, a vertical height is provided between the first electrode and the second electrode, the separation distance is greater than or equal to the vertical height, and the overlap width is greater than or equal to the vertical height.
16. The touch display device of claim 15, wherein the overlap width is greater than 2 microns.
17. The touch display device of claim 1, wherein the first electrode, the second electrode and the touch sensing electrode are all located on the same plane, and the first electrode and the second electrode are located on the same side of the light emitting layer, and the second electrode surrounds the light emitting diode.
18. The touch display device of claim 17, wherein the first electrode has a first voltage and the second electrode has a second voltage, and the first voltage is greater than the second voltage.
19. The touch display device of claim 17, further comprising an extension electrode electrically connected to the second electrode, the extension electrode and a portion of the driving control element being disposed in a same layer.
20. The touch display device of claim 19, wherein the second electrode and the extension electrode are disposed on different layers, and the extension electrode forms a closed structure.
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| TW107143755A TWI704478B (en) | 2018-12-05 | 2018-12-05 | Touch display device |
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| CN109782959B (en) * | 2019-02-02 | 2022-11-25 | 京东方科技集团股份有限公司 | Touch display screen, driving method and display device |
| CN111798786B (en) * | 2019-07-26 | 2022-11-01 | 友达光电股份有限公司 | Driving method of display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104779267A (en) * | 2015-04-01 | 2015-07-15 | 上海天马微电子有限公司 | Organic light-emitting display panel and organic light-emitting display |
| CN108183156A (en) * | 2017-12-26 | 2018-06-19 | 深圳市华星光电技术有限公司 | Micro-led display panel and preparation method thereof |
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| TW201346998A (en) * | 2012-05-15 | 2013-11-16 | Wintek Corp | Touch display panel |
| TWI621261B (en) * | 2016-08-31 | 2018-04-11 | 群創光電股份有限公司 | Organic light-emitting diode touch display device |
| US10331263B2 (en) * | 2016-11-23 | 2019-06-25 | Superc-Touch Corporation | OLED display panel with touch sensing electrodes |
| KR20180066945A (en) * | 2016-12-09 | 2018-06-20 | 삼성디스플레이 주식회사 | Display device |
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| CN104779267A (en) * | 2015-04-01 | 2015-07-15 | 上海天马微电子有限公司 | Organic light-emitting display panel and organic light-emitting display |
| CN108183156A (en) * | 2017-12-26 | 2018-06-19 | 深圳市华星光电技术有限公司 | Micro-led display panel and preparation method thereof |
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