TWI647836B - Isolations posts of touch organic light-emitting diode - Google Patents

Abstract

The invention relates to a barrier column conductive structure of a touch organic light-emitting diode, which is mainly disposed on a side of a spacer column of a non-light-emitting region of the substrate, and a spacer layer and a photoresist layer are adjacent to each other to form a continuous surface. The touch electrode layer deposited on the isolation pillar extends downwardly from the extending slope of the surface of the photoresist layer to the substrate and is electrically connected to the signal node on the substrate, thereby avoiding the touch electrode layer due to the insulating layer and the isolation pillar. The height difference is interrupted, and when the touch electrode layer is used as a touch electrode, the touch function can be realized.

Description

Isolation column conductive structure of touch organic light-emitting diode

The invention relates to a light-emitting diode of a touch control device, in particular to a conductive structure of an isolation column of a touch organic light-emitting diode.

When the organic light emitting diode is applied to the capacitive touch panel and the touch structure is required, the anode and the cathode of the organic light emitting diode can be generally used as the touch electrode, or the touch circuit can be additionally added. In the case of using the anode and the cathode on the organic light-emitting diode for both touch and display, it is necessary to drive the display and the touch for two periods when designing the components on the driving end, which is troublesome in the process; The circuit mode drives the display and the touch. The advantage is that the touch line and the driving line of the organic light emitting diode are driven separately, and the display and touch are not required to be driven when the driving end design component, but the disadvantage is It is necessary to consider whether the organic light-emitting diode has sufficient space in the process sequence and structure.

Please refer to the Republic of China Patent No. I560601, which is a touch display panel. As shown in FIG. 1 and FIG. 2, the touch line 12 having the substrate 10 and the plurality of straight strips is embedded in the substrate 10 along the X-axis and the Y-axis direction. The touch line 12 is covered by the first insulating layer 14 , and the first electrode string 16 and the second electrode string 20 are disposed above the substrate 10 . The touch display panel disclosed in the present invention is configured by the first electrode string. The column 16 and the second electrode string 20 have a display function. The touch line 12 embedded in the insulating layer 14 of the substrate 10 has a touch function, although the thickness of the display panel can be slightly The reduction, but the disadvantage is that additional process procedures are required to make the touch line 12, which increases the difficulty of the process.

Accordingly, how to develop a structure that does not change the original self-luminous organic light-emitting display (PMOLED) to achieve touch and display functions is the research and development focus of the present invention.

The present invention provides a spacer column conductive structure of a touch-sensitive organic light-emitting diode, and the main purpose thereof is to prevent the touch electrode layer on the spacer from being pulled downward until the substrate is electrically connected to the signal node, and is subjected to an insulating layer. An interruption occurs due to the difference in height from the isolation column.

In order to achieve the foregoing objective, the present invention is a barrier pillar conductive structure of a touch organic light-emitting diode, comprising: a substrate, a central region is a light-emitting region, a side region is a non-light-emitting region; and an anode layer is arranged in a longitudinally spaced manner. On the substrate; the insulating layer is overlapped between the anode layers; the spacers are arranged on the insulating layer in a laterally spaced manner, and the spacers extend from the light-emitting region of the substrate to the non-light-emitting region of the substrate; the organic light-emitting layer, Evaporating on the surface of the anode layer and the spacer; the cathode layer is deposited on the surface of the organic light-emitting layer of the anode layer by a metal material; the touch electrode layer is deposited on the surface of the organic light-emitting layer of the spacer by a metal material; the photoresist layer is adjacent to The touch electrode layer is disposed on the side of the spacer of the non-light-emitting region of the substrate; wherein the touch electrode layer deposited on the surface of the organic light-emitting layer of the spacer extends downwardly to the substrate through the extending slope of the surface of the photoresist layer and is connected to the signal node on the substrate ( The Touch Pad forms an electrical connection; the cover is packaged on the substrate.

Preferably, the isolation pillar and the photoresist layer respectively form an inverted ladder structure and a forward ladder structure in a yellow light process, so that the isolation pillar of the inverted ladder structure and the photoresist layer of the forward ladder structure form a continuous relationship with each other on the surface thereof. surface.

Preferably, the touch electrode layer deposited on the isolation pillar can be used as a touch electrode, and the touch operation is performed on the touch electrode layer by means of capacitance detection.

10‧‧‧Transparent touch panel structure

12‧‧‧ glass substrate

14‧‧‧ Cover

20‧‧‧Capacitive touch elements

40‧‧‧Display components

50‧‧‧Intermediate membrane structure

10‧‧‧Substrate

12‧‧‧ touch line

14‧‧‧First insulation

16‧‧‧First electrode series

20‧‧‧Second electrode series

<present invention>

60‧‧‧Substrate

600‧‧‧Lighting area

601‧‧‧Non-lighting area

602‧‧‧ signal node

61‧‧‧ anode layer

62‧‧‧Insulation

63‧‧‧Isolation column

64‧‧‧Organic light-emitting layer

65‧‧‧Photoresist layer

650‧‧‧Extended slope

66‧‧‧ Cover

660‧‧‧Water Absorbent

67‧‧‧ cathode layer

68‧‧‧Touch electrode layer

FIG. 1 is a cross-sectional view (1) of a conventional touch panel.

2 is a schematic cross-sectional view of a conventional touch panel (2).

Figure 3 is a schematic plan view of the present invention.

Figure 4 is a cross-sectional view of the first embodiment of the present invention taken along line 3A-3A of Figure 3;

Figure 5 is a cross-sectional view of the first embodiment of the present invention taken along line 3B-3B of Figure 3;

Figure 6 is a schematic cross-sectional view showing a second embodiment of the present invention.

Figure 7 is a schematic cross-sectional view showing a third embodiment of the present invention.

Referring to FIG. 3 to FIG. 5 , the conductive structure of the isolation column of the touch organic light-emitting diode according to the first embodiment of the present invention includes: a substrate 60, which may be a transparent material, and a central region of the substrate 60 is a light-emitting area 600. The side area is a non-light-emitting area 601, and the non-light-emitting area 601 of the substrate 60 is provided with a signal node 602 (Touch Pad); the anode layer 61 may be a transparent material and arranged on the substrate 60 in a longitudinally spaced manner; In the invention, the transparent material of the anode layer 61 may be TCO (Transparent Conductive Oxide), for example, ITO, IZO, ZnO, SnO ₂ , and ITO is the best material; the insulating layer (PI) 62 is overlapped with the anode layer 61. In the present invention, the insulating layer (PI) 62 may be a transparent material or a translucent material; the spacers 63 are formed into an inverted ladder structure by a yellow light process, and are arranged in a laterally spaced manner on the insulating layer (PI). 62, and the spacer 63 extends from the light-emitting region 600 of the substrate 60 to the non-light-emitting region 601 of the substrate 60 (in other words, the spacer 63 extends from the central region of the substrate 60 to the side region of the substrate 60); in the present invention The spacer 63 can be a transparent material or a translucent material; The light layer 64 is vapor-deposited on the surface of the anode layer 61 and the isolation pillar 63, respectively; the photoresist layer 65 is formed into a forward ladder type structure by a yellow light process and is disposed adjacent to the side of the isolation pillar 63 disposed on the side non-light-emitting region 601 of the substrate 60. The spacer 63 and the photoresist layer 65 are in close proximity to each other, and the surface of the spacer 63 forms a continuous surface with the surface of the photoresist layer 65, and the surface of the photoresist layer 65 is provided with an upper and lower extending slope 650; the cover 66 The organic light-emitting layer 660 is disposed on the substrate 60, and the water absorbing material 660 is disposed under the cover plate 66. The moisture absorbing material 660 adsorbs moisture that penetrates into the interior of the cover plate 66, thereby preventing the organic light-emitting layer 64 from causing oxidation.

With the above description, when the touch function of the organic light emitting diode of the first embodiment of the present invention is to be realized, the metal material is deposited on the entire surface (the metal material may be gold, silver, aluminum, or aluminum). The cathode layer 67 and the touch electrode layer 68 are simultaneously formed on the anode layer 61 and the surface of the organic light-emitting layer 64 of the spacer 63; wherein the spacer 63 located in the region of the light-emitting region 600 of the substrate 60 is laminated. It is disposed above the insulating layer (PI) 62 to form a cross section of the laminated pillar 63 of the inverted ladder structure and the insulating layer (PI) 62 of the forward ladder structure (as shown in FIG. 4), so that the cathode layer 67 The touch electrode layer 68 is disconnected from the touch electrode layer 68 to avoid short-circuiting between the two; and the touch electrode layer 68 deposited on the organic light-emitting layer 64 of the spacer 63 is used as a touch electrode, and the capacitance detection method is adopted. The operation of the touch control layer 68 is performed in the horizontal direction along the isolation pillar 63. Therefore, the vertical touch behavior can be determined through the output order of each touch electrode layer 68.

In addition, since the cathode layer 67 of the present invention is not shared with the touch electrode layer 68, the display and touch are driven for two periods when the driving end does not need to design components, that is, when the organic light emitting diode of the present invention is to realize the display function. The anode layer 61 and the cathode layer 67 can be used, and when the touch function is implemented, the touch electrode layer 68 can be used.

However, it is worth mentioning that when the touch function is implemented in the present invention, since the heights of the insulating layer (PI) 62 and the spacer 63 are respectively about several um, the thickness of the touch electrode layer 68 is about several hundred nm, in other words, The height of the insulating layer (PI) 62 plus the spacer 63 is tens of times higher than that of the touch electrode layer 68. Therefore, when the touch electrode layer 68 on the spacer 63 is to be pulled down to the substrate 60, it must be considered. The touch electrode layer 68 may be interrupted due to the difference in the height of the insulating layer (PI) 62 plus the isolation pillar 63; In order to overcome this problem, the present invention forms a photoresist layer 65 on the side of the isolation pillar 63 of the non-light-emitting region 601 on the side of the substrate 60, so that the isolation pillar 63 of the inverted ladder structure and the photoresist layer 65 of the forward ladder structure are formed. Adjacent to each other, the surface of the spacer 63 forms a continuous surface with the surface of the photoresist layer 65. Therefore, the touch electrode layer 68 on the spacer 63 can extend along the non-light-emitting region 601 of the substrate 60 when the metal material is deposited. The surface of the photoresist layer 65 is adjacent to the surface of the photoresist layer 65 and extends downward to the substrate 60 along the extending slope 650 of the photoresist layer 65, and covers the signal node 602 (Touch Pad) on the substrate 60 for electrical connection; When the touch electrode layer 68 on the pillar 63 extends downward to the substrate 60, the interruption of the um height difference between the insulating layer (PI) 62 and the isolation pillar 63 can be avoided, and the touch electrode layer 68 can be made to touch. The effect of the touch function is achieved by controlling the electrodes.

In addition, as shown in FIG. 3 and FIG. 6 , the conductive structure of the isolation pillar of the touch organic light-emitting diode according to the second embodiment of the present invention includes: the substrate 60 can be a transparent material, and the central region of the substrate 60 is illuminated. The area 600 is a non-light-emitting area 601, and the non-light-emitting area 601 of the substrate 60 is provided with a signal pad 602 (Touch Pad). The anode layer 61 may be a transparent material and arranged on the substrate 60 in a longitudinally spaced manner. In the present invention, the transparent material of the anode layer 61 may be TCO (Transparent Conductive Oxide), for example: ITO, IZO, ZnO, SnO ₂ , and ITO is the best material; the insulating layer (PI) 62 is overlapped with the anode. In the present invention, the insulating layer (PI) 62 may be a transparent material or a translucent material; the spacers 63 are formed into an inverted ladder structure by a yellow light process, and are disposed on the insulating layer in a laterally spaced manner ( PI) 62, and the spacer 63 extends from the light-emitting region 600 of the substrate 60 to the non-light-emitting region 601 of the substrate 60 (in other words, the spacer 63 extends from the central region of the substrate 60 to the side region of the substrate 60); In the invention, the spacer 63 may be a transparent material or a translucent material; The organic light-emitting layer 64 is vapor-deposited on the surface of the anode layer 61 and the spacer 63, respectively; the photoresist layer 65 is formed into a forward ladder type structure by a yellow light process and is disposed adjacent to the spacer pillar 63 disposed on the side non-light-emitting region 601 of the substrate 60. The spacers 63 and the photoresist layer 65 are adjacent to each other, and the surface of the spacer 63 is formed into a continuous surface with the surface of the photoresist layer 65, and the surface of the photoresist layer 65 is provided with an upper and lower extending slope 650; 66, is packaged on the substrate 60, and a water absorbing material 660 is disposed under the cover plate 66. The water absorbing material 660 adsorbs moisture that penetrates into the inside of the cover plate 66, thereby preventing the organic light-emitting layer 64 from causing oxidation.

In this embodiment, the photoresist layer 65 is also disposed adjacent to the side of the isolation pillar 63 of the non-light-emitting region 601 on the side of the substrate 60, so that the isolation pillar 63 of the inverted ladder structure and the photoresist layer 65 of the forward ladder structure are mutually connected. Adjacent, and the surface of the spacer 63 forms a continuous surface with the surface of the photoresist layer 65; this embodiment does not The same as the first embodiment, the height of the photoresist layer 65 is slightly higher than the height of the spacer 63, so that a partial area of the photoresist layer 65 covers a part of the surface of the spacer 63; accordingly, the spacer 63 is The touch electrode layer 68 may extend along the surface of the photoresist layer 65 adjacent to the non-light emitting region 601 on the side of the substrate 60 during deposition of the metal material, and extend down to the substrate 60 along the extending slope 650 of the surface of the photoresist layer 65. And covering the signal node 602 (Touch Pad) on the substrate 60 for electrical connection; therefore, the touch electrode layer 68 on the isolation pillar 63 can be avoided because the insulating layer (PI) 62 is isolated from the substrate 60 The um height difference of the pillars 63 is interrupted, and the touch electrode layer 68 is used as a touch electrode to realize the touch function.

Referring to FIG. 3 and FIG. 7 , the conductive structure of the isolation pillar of the touch organic light-emitting diode according to the third embodiment of the present invention includes: a substrate 60 which can be a transparent material, and a central region of the substrate 60 is a light-emitting region. 600, the side area is a non-light-emitting area 601, the non-light-emitting area 601 of the substrate 60 is provided with a signal node 602 (Touch Pad); the anode layer 61, which may be a transparent material, arranged on the substrate 60 in a longitudinally spaced manner; In the present invention, the transparent material of the anode layer 61 may be TCO (Transparent Conductive Oxide), for example, ITO, IZO, ZnO, SnO ₂ , and ITO is the best material; the insulating layer (PI) 62 is bonded to the anode layer. In the present invention, the insulating layer (PI) 62 may be a transparent material or a translucent material; the spacers 63 are formed into an inverted ladder structure by a yellow light process, and are disposed on the insulating layer in a laterally spaced manner (PI) 62, and the spacer 63 extends from the light-emitting region 600 of the substrate 60 to the non-light-emitting region 601 of the substrate 60 (in other words, the spacer 63 extends from the central region of the substrate 60 to the side region of the substrate 60); The spacer 63 may be a transparent material or a translucent material; The light-emitting layer 64 is vapor-deposited on the surface of the anode layer 61 and the spacer 63, respectively; the photoresist layer 65 is formed into a forward ladder structure by a yellow light process and is disposed adjacent to the isolation pillar 63 disposed on the side non-light-emitting region 601 of the substrate 60. The spacers 63 and the photoresist layer 65 are adjacent to each other, and the surface of the spacer 63 is formed into a continuous surface with the surface of the photoresist layer 65, and the surface of the photoresist layer 65 is provided with an upper and lower extending slope 650; 66, is packaged on the substrate 60, and a water absorbing material 660 is disposed under the cover plate 66. The water absorbing material 660 adsorbs moisture that penetrates into the inside of the cover plate 66, thereby preventing the organic light-emitting layer 64 from causing oxidation.

The present embodiment is different from the first and second embodiments in that the spacer 63 on the side non-light-emitting region 601 of the substrate 60 extends from the upper side of the insulating layer (PI) 62 to the substrate 60, and then the photoresist layer 65. Immediately adjacent to the side of the spacer 63 disposed on the substrate 60, and the height of the photoresist layer 65 is slightly higher than the height of the spacer 63, a portion of the photoresist layer 65 is covered to a portion of the surface of the spacer 63, and The isolation pillar 63 of the inverted ladder structure and the photoresist layer 65 of the forward ladder structure are in close proximity to each other, and the surface of the isolation pillar 63 forms a continuous surface with the surface of the photoresist layer 65; accordingly, the touch electrode on the isolation pillar 63 The layer 68 may extend along the surface of the photoresist layer 65 adjacent to the non-light emitting region 601 on the side of the substrate 60 during deposition of the metal material, and extend down to the substrate 60 along the extending slope 650 of the surface of the photoresist layer 65, and cover The signal node 602 (Touch Pad) on the substrate 60 is electrically connected; therefore, the touch electrode layer 68 on the isolation pillar 63 can be avoided when extending down to the substrate 60 because of the insulating layer (PI) 62 and the isolation pillar 63. The um height difference is interrupted, and the touch electrode layer 68 is used as the touch electrode to realize the touch function. Effect.

Based on the above description, the common technical features of the first to third embodiments of the present invention have the following two points:

The first point, the touch electrode layer and the cathode layer are completed in the same process, that is, In the process of depositing the whole surface of the metal material, the cathode layer and the touch electrode layer are simultaneously formed on the surface of the organic light-emitting layer of the anode layer and the isolation pillar, and the touch electrode layer on the isolation pillar is used as the touch electrode, and the capacitor is transmitted through the capacitor. The detection method performs a touch behavior on the touch electrode layer.

Secondly, in the present invention, a photoresist layer is disposed adjacent to a side of the isolation pillar of the non-light-emitting region on the side of the substrate, so that the isolation pillar and the photoresist layer are in close proximity to each other, and the surface of the isolation pillar forms a continuous surface with the surface of the photoresist layer. The touch electrode layer on the isolation pillar can be deposited on the surface of the photoresist layer by continuous surface extension, and then the touch electrode layer extends down to the substrate along the extending slope of the surface of the photoresist layer, and covers the non-light-emitting region of the substrate. The signal nodes form an electrical connection to prevent the touch electrode layer from being interrupted due to the difference in the height of the insulating layer plus the isolation column, thereby achieving the purpose and effect of implementing the touch function.

The above embodiments are merely illustrative of the present invention and its effects, and are not intended to limit the present invention, and those skilled in the art can modify and modify the above embodiments without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as listed in the scope of the patent application to be described later.

Claims (10)

An isolation pillar conductive structure of a touch organic light-emitting diode comprises: a substrate having a light-emitting region and a non-light-emitting region; an anode layer disposed on the substrate in a longitudinally spaced manner; and an insulating layer overlapping the anode layer The spacers are disposed on the insulating layer in a laterally spaced manner, the spacer pillars extending from the light emitting region of the substrate to the non-light emitting region of the substrate; the organic light emitting layer is respectively deposited on the anode layer and the anode Separating the surface of the pillar, and then depositing the cathode layer and the touch electrode layer on the surface of the anode layer and the organic light-emitting layer of the spacer pillar by using a metal material to be deposited on the entire surface; the photoresist layer is disposed adjacent to the side of the substrate The side of the isolation column of the non-light-emitting region is such that the isolation pillars located on the non-light-emitting regions on the side of the substrate are adjacent to the photoresist layer, and the surface of the spacers forms a continuous surface with the surface of the photoresist layer, and the photoresist The surface of the layer is provided with an extending slope from top to bottom, so that the touch electrode layer on the spacer pillar can be deposited on the surface of the photoresist layer by the continuous surface extension, and the downward slope of the surface of the photoresist layer extend Non-emission region of the substrate; lid, the package on the substrate. The control column conductive structure of the touch-sensitive organic light-emitting diode according to claim 1, wherein the non-light-emitting region of the substrate is provided with a signal node, and the touch electrode layer on the spacer extends downward to the substrate In the non-light-emitting region, the signal nodes on the substrate are covered and an electrical connection is formed. The conductive structure of the isolation column of the touch organic light-emitting diode according to claim 1 The spacer column forms an inverted ladder structure in a yellow light process, and the photoresist layer located in the non-light emitting region of the substrate forms a forward ladder type structure by a yellow light process. The control column conductive structure of the touch-sensitive organic light-emitting diode according to claim 1, wherein the touch electrode layer deposited on the isolation pillar can be used as a touch electrode, and the capacitance detection method is used. The touch electrode layer performs a touch behavior operation. An isolation pillar conductive structure of a touch organic light-emitting diode comprises: a substrate having a light-emitting region and a non-light-emitting region; an anode layer disposed on the substrate in a longitudinally spaced manner; and an insulating layer overlapping the anode layer The spacers are disposed on the insulating layer in a laterally spaced manner, the spacer pillars extending from the light emitting region of the substrate to the non-light emitting region of the substrate; the organic light emitting layer is respectively deposited on the anode layer and the anode Separating the surface of the pillar, and then depositing the cathode layer and the touch electrode layer on the surface of the anode layer and the organic light-emitting layer of the spacer pillar by using a metal material to be deposited on the entire surface; the photoresist layer is disposed adjacent to the side of the substrate The side of the isolation column of the non-light-emitting region is such that the isolation pillars located on the non-light-emitting regions on the side of the substrate are adjacent to the photoresist layer, and the surface of the spacers forms a continuous surface with the surface of the photoresist layer, and the photoresist The surface of the layer is provided with an extended slope from top to bottom, wherein the height of the photoresist layer is slightly higher than the height of the spacer, so that a part of the photoresist layer covers a part of the surface of the spacer, so that The isolation The touch electrode layer may be deposited by the continuous surface extending to the surface of the photoresist layer, and extends along the ramp extending down to the surface of the photoresist layer non-emission region of the substrate; A cover plate is packaged on the substrate. The non-light-emitting region of the substrate is provided with a signal node, and the touch electrode layer on the spacer extends downward to the substrate. In the non-light-emitting region, the signal nodes on the substrate are covered and an electrical connection is formed. The control column conductive structure of the touch-sensitive organic light-emitting diode according to claim 5, wherein the touch electrode layer deposited on the isolation pillar can be used as a touch electrode, and the capacitance detection method is used. The touch electrode layer performs a touch behavior operation. An isolation pillar conductive structure of a touch organic light-emitting diode comprises: a substrate having a light-emitting region and a non-light-emitting region; an anode layer disposed on the substrate in a longitudinally spaced manner; and an insulating layer overlapping the anode layer An isolation column is disposed on the insulating layer in a laterally spaced manner. The isolation column extends from a light-emitting region of the substrate to a non-light-emitting region of the substrate, and the isolation pillar of the non-light-emitting region of the substrate side is Extending from the upper side of the insulating layer to the substrate; the organic light-emitting layer is respectively deposited on the surface of the anode layer and the spacer, and is deposited on the entire surface by a metal material, and is simultaneously isolated from the anode layer a surface of the organic light-emitting layer of the pillar forms a cathode layer and a touch electrode layer; the photoresist layer is disposed adjacent to a side of the spacer disposed on the non-light-emitting region of the substrate, so that the isolation pillar located in the non-light-emitting region of the substrate is adjacent to the photoresist layer And the surface of the isolation pillar forms a continuous surface with the surface of the photoresist layer, and the surface of the photoresist layer is provided with an extended slope from top to bottom, wherein the height of the photoresist layer is slightly higher than the height of the spacer a portion of the photoresist layer covering a portion of the surface of the spacer, such that the touch electrode layer on the spacer can be deposited on the surface of the photoresist layer by the continuous surface, and An extension slope of the surface of the photoresist layer extends downward to a non-light-emitting region of the substrate; a cover plate is packaged on the substrate. The control column conductive structure of the touch-sensitive organic light-emitting diode according to claim 8, wherein the non-light-emitting region of the substrate is provided with a signal node, and the touch electrode layer on the spacer extends downward to the substrate In the non-light-emitting region, the signal nodes on the substrate are covered and an electrical connection is formed. The contact pillar conductive structure of the touch-sensitive organic light-emitting diode according to claim 8, wherein the touch electrode layer deposited on the spacer is used as a touch electrode, and the method of detecting through the capacitor is The touch electrode layer performs a touch operation.