TW201545014A - In-cell organic light emitting diode touch panel - Google Patents

Abstract

An in-cell organic light emitting diode touch panel includes a lower touch sensor layer having a lower touch sensor array and an upper touch sensor layer having an upper touch sensor array, the arranging direction of the lower touch sensor array is vertical to that of the upper touch sensor array, and the lower touch sensor array cooperates with the upper touch sensor array to form a touch sensing unit for sensing touch signals, such that a sensing element of the touch signals can be integrated with the OLED touch panel, so as to form an in-cell touch. Such arrangements are not only simple and low cost, but also can solve the problems of low transmittance and moire.

Description

In-line active matrix organic light emitting diode touch panel

The present invention relates to the field of display screen technology, and in particular to the field of light-emitting diode display screen technology, and specifically relates to an embedded active matrix organic light-emitting diode touch panel.

In current electronic products, display panels with touch functions are generally mounted on various types of smart handheld devices, so that the requirements for lightness, thinness and shortness of electronic products are also applied to touch panels. Through the efforts of manufacturers, solutions ranging from Out-Cell Touch to On-Cell Touch to One Glass Solution (OGS) appear.

Among them, the on-cell touch panel (On-Cell Touch) is a sensor and a related film on the upper cover glass, and finally a piece of protection is attached to the uppermost layer. Cover lens. The disadvantage is that the surface-mounted touch panel has poor transmittance (Low transmittance); it is easy to produce a rainbow pattern (Moire), and the surface-mounted touch panel is thicker and the cost is relatively high.

The single glass touch (OGS) commonly used in the prior art integrates the upper cover glass and the sensor into a single glass state and is attached to the panel (Panel cell). In this way, the number of glass is reduced to two, so that the overall thickness of the panel can be reduced to some extent and the production cost can be reduced compared with the in-cell touch panel. However, the single glass touch panel structure in the prior art also has a panel. Poor penetration and prone to rainbow ripples.

Therefore, how to provide a touch panel which can reduce the thickness of the panel and reduce the cost, is suitable for light and thin electronic products, can improve the transparency of the panel, reduce the occurrence of rainbow ripple, and finally improve the user experience becomes the technology. The problem that needs to be solved in the field.

In view of this, the inventors have conceived and further studied, and finally invented an in-cell active matrix organic light emitting diode touch panel.

The object of the present invention is to overcome the shortcomings of the prior art mentioned above, and to provide an effect of effectively improving the transparency of the panel and reducing the rainbow ripple phenomenon, and having the advantages of simple structure, thinner thickness and lower cost, and can be applied to be lighter, thinner and shorter. In-Cell Touch active matrix organic light-emitting diode touch panel with electronic products and user experience.

In order to achieve the above objective, the in-cell active-matrix organic light-emitting diode touch panel of the present invention comprises: a substrate; a TFT backplane on the substrate; and an OLED panel located on the TFT backplane The upper touch electrode layer, an upper electrode layer, and an OLED layer between the lower electrode layer and the upper electrode layer; the lower touch sensor layer, the lower touch sensor layer includes a touch Sensor array a lower touch sensor in the lower touch sensor array is patterned in a lower gap channel formed between the lower electrodes of the lower electrode layer; an upper touch sensor layer, The upper touch sensor layer includes an upper touch sensor array, and the upper touch sensor in the upper touch sensor array is patterned on the upper gap formed between the upper electrodes of the upper electrode layer The arrangement of the lower touch sensor array is perpendicular to the arrangement direction of the upper touch sensor array, and the lower touch sensor array and the upper touch sensor array are configured to sense touch. The mutual touch sensing unit of the signal, and the lower touch sensor array and the upper touch sensor array are electrically connected to the touch signal circuit.

The embedded active matrix organic light emitting diode touch panel The lower electrode layer is an OLED plate anode layer, and the upper electrode layer is an OLED plate cathode layer.

The embedded active matrix organic light emitting diode touch panel The lower gap channel formed between the lower electrodes of the lower electrode layer is a first direction, and the lower touch sensor array is a scan signal sensor array of the lower gap channel disposed in the first direction; The upper gap channel formed between the upper electrodes of the upper electrode layer is a second direction perpendicular to the first direction, and the upper touch sensor array is a driving signal sensing of the upper gap channel disposed in the second direction Array.

The embedded active matrix organic light emitting diode touch panel The lower gap channel formed between the lower electrodes of the lower electrode layer is a second direction, and the lower touch sensor array is a lower gap channel disposed in the second direction. The driving signal sensor array; the upper gap channel formed between the upper electrodes of the upper electrode layer is a first direction perpendicular to the second direction, and the upper touch sensor array is disposed in the first direction A scan signal sensor array of the upper gap channel.

The embedded active matrix organic light emitting diode touch panel The touch signal circuit is disposed on the TFT backplane. The in-cell active matrix organic light emitting diode touch panel of the invention adopts the lower touch sensor layer and the upper touch sensor layer of the OLED board, and the lower touch sensor layer Including a lower touch sensor array, the lower touch sensor in the lower touch sensor array is patterned in a lower gap channel formed between each lower electrode of the lower electrode layer, the upper touch The control sensor layer includes an upper touch sensor array, and the upper touch sensor in the upper touch sensor array is patterned on the upper gap channel formed between the upper electrodes of the upper electrode layer The arrangement of the lower touch sensor array is perpendicular to the arrangement direction of the upper touch sensor array, and the lower touch sensor array and the upper touch sensor array are configured to sense a touch signal. The mutual capacitive touch sensing unit. Therefore, the inductive component of the touch signal can be integrated with the OLED panel to form an in-cell touch panel. The in-cell active matrix organic light emitting diode touch panel of the present invention is not only simple in structure. Thinner in thickness and lower in cost, it is suitable for lighter, thinner and shorter electronic products, and can effectively improve panel penetration, reduce the occurrence of rainbow ripples, and greatly enhance the user experience.

The technology, hand used in connection with the present invention to achieve the above object For the purpose of the paragraphs and other functions, a preferred embodiment is described in detail with reference to the drawings.

〔this invention〕

20‧‧‧Substrate

21‧‧‧TFT backplane

30‧‧‧OLED board

31‧‧‧ lower electrode layer

32‧‧‧Upper electrode layer

33‧‧‧ OLED layer

34‧‧‧Frit

35‧‧‧Package glass

40‧‧‧Touch sensor layer

41‧‧‧Under the touch sensor layer

42‧‧‧Upper touch sensor layer

FIG. 1 is a schematic structural view of an embodiment of the present invention.

2 is a schematic cross-sectional view of an embodiment of the present invention.

FIG. 3 is a schematic diagram of an XY axis arrangement of upper and lower electrode layers according to an embodiment of the present invention.

4 is a schematic view showing an XY axis arrangement of upper and lower electrodes in another embodiment of the present invention.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

In order to enable the reviewing committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [detailed description of the drawings] as follows: Please refer to FIG. 1 and FIG. Schematic diagram of the embedded active matrix organic light emitting diode touch panel.

In one embodiment, the in-cell active-matrix OLED touch panel has a substrate 20, a TFT backplane 21 on the substrate 20, and a touch sense on the TFT backplane 21. a detector layer 40 and an OLED panel 30, the OLED panel includes a lower electrode layer 31, an upper electrode layer 32, and an OLED layer 33 between the lower electrode layer 31 and the upper electrode layer 32. The detector layer 40 includes a touch sensor layer 41 and an upper touch sense After the TFT layer 34 is covered with a glass frit 34, the touch sensor layer 40 and the OLED panel 30 are covered with a cover glass 35. As shown in FIG. 1 and FIG. 2 , the touch sensor layer 41 under the embedded active matrix organic light emitting diode touch panel includes a lower touch sensor array, and the lower touch sensor array The lower touch sensor in 411 is patterned in the lower gap channel formed between the lower electrodes of the lower electrode layer 31, and the upper touch sensor layer 42 includes an upper touch sensor array. The upper touch sensor in the upper touch sensor array is patterned in the upper gap channel formed between the upper electrodes of the upper electrode layer; the lower touch sensor array is arranged in the direction The upper touch sensor array is arranged in a vertical direction, and the lower touch sensor array and the upper touch sensor array form a mutual capacitive touch sensing unit for sensing a touch signal, and the lower touch sensing unit The array of the sensors and the array of upper touch sensors are electrically connected to the touch signal circuit. The touch signal circuit is disposed on the TFT backplane 21. In a preferred embodiment, the lower electrode layer 31 is an OLED plate anode layer, the upper electrode layer 32 is an OLED plate cathode layer, and the lower electrode layer 31 includes a plurality of anodes, that is, RGB distributed in FIGS. 3 and 4.

In a more preferred embodiment, each of the lower electrode layers 31 The lower gap channel formed between the lower electrodes is a first direction, and the lower touch sensor array is a scan signal sensor array of the lower gap channel disposed in the first direction; each upper electrode of the upper electrode layer 32 The upper gap channel formed between the two is perpendicular to the first direction, and the upper touch sensor array is a driving signal sensor array of the upper gap channel disposed in the second direction.

Or alternatively, between the lower electrodes in the lower electrode layer 31 The lower gap channel is a second direction, and the lower touch sensor array is a driving signal sensor array of the lower gap channel disposed in the second direction; formed between the upper electrodes of the upper electrode layer 32 The upper gap channel is a first direction perpendicular to the second direction, and the upper touch sensor array is a scan signal sensor array disposed in the gap direction in the first direction.

In the application of the present invention, the embedded active matrix of the present invention has The light-emitting diode touch panel is designed to integrate a touch sensor into a projected capacitive touch mechanism in a TFT process. The original TFT process is used to create a XY-axis signal scan to achieve the function of the touch sensor. This can successfully reduce costs, increase penetration and reduce the occurrence of rainbow ripples.

In actual manufacturing, the lower electrode layer 31 of the OLED panel 30 is first introduced. The row is patterned to produce an X (or Y) axial scan signal; the upper electrode layer 32 of the OLED panel 30 is patterned to produce a Y (or X) axial drive signal to form an in-line touch induction.

As shown in FIGS. 3 and 4, the left side is arranged on the lower electrode layer 31. The X-axis sensor and the Y-axis sensor arranged on the upper electrode layer 32 on the right side are designed to design a scanning signal for the vacant position of the lower electrode layer 31, and cover the entire surface. The upper electrode layer 32 is patterned with relevant driving signals, and the anode scanning signal and the cathode driving signal arranged alternately form a mutual capacitance type touch scanning mechanism as a touch sensing element.

The specific anode and cathode arrangement can be arranged in any manner as shown in FIG. 3 or FIG. 4, and arranged in a staggered manner in the XY axis according to the mode of the two-layer structure. A wire is arranged around the outside of the electrode to electrically connect the electrode in the XY axis to the sensing channel of the control circuit. In actual use, when there is no conductive object approaching, each touch electrode will have a fixed coupling capacitance between each other. At this time, the electric field distribution between the electrode and the electrode is fixed, and the control circuit will pass through each sensing channel. The electrode capacitance values on each XY axis are recorded. When the human finger touches the panel, the electric field originally fixed on each electrode changes due to the connection of part of the power line to the finger skin, thereby forming a new capacitance at the contact point, thereby changing the total capacitance value of the contact point, and the control end sensing To the change of the capacitance value, to locate the contact, to achieve the touch function.

The built-in active matrix organic light emitting diode touch panel of the invention has a lower touch feeling due to the lower touch sensor layer 41 and the upper touch sensor layer 42 of the OLED board 30. The detector layer 41 includes a lower touch sensor array, and the lower touch sensor in the lower touch sensor array is patterned on the lower gap channel formed between the lower electrodes of the lower electrode layer 31. The upper touch sensor layer 42 includes an upper touch sensor array, and the upper touch sensor in the upper touch sensor array is patterned between the upper electrodes of the upper electrode layer 32. The upper touch sensor array is arranged in a direction perpendicular to the arrangement direction of the upper touch sensor array, the lower touch sensor array and the upper touch sensor The array constitutes a mutual capacitive touch sensing unit for sensing a touch signal. Thereby, the sensing element of the touch signal can be integrated with the OLED panel 30 The in-cell active-in-one OLED touch panel of the present invention is not only simple in structure, but also thinner in thickness and lower in cost, and is suitable for use in an in-cell (In-Cell Touch) touch panel. Lightweight and short electronic products, and can effectively improve the panel penetration, reduce the occurrence of rainbow ripples, and greatly enhance the user experience.

In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and changes can be made without departing from the spirit and scope of the invention. Accordingly, the specification and drawings are to be regarded as

From the above, it is known that the present invention truly conforms to "industrial availability," "novelty," and "progressiveness", and submits an invention patent application in accordance with the law, praying for review and early granting of a patent, and it is truly sensible.

20‧‧‧Substrate

21‧‧‧TFT backplane

31‧‧‧ lower electrode layer

32‧‧‧Upper electrode layer

33‧‧‧ OLED layer

35‧‧‧Package glass

41‧‧‧Under the touch sensor layer

42‧‧‧Upper touch sensor layer

Claims (5)

An embedded active matrix organic light emitting diode touch panel comprises: a substrate; a TFT back plate on the substrate; an OLED plate on the TFT back plate, including a lower electrode layer, a An upper electrode layer, and an OLED layer between the lower electrode layer and the upper electrode layer; a lower touch sensor layer, the lower touch sensor layer includes a bottom touch sensor array, the lower touch The lower touch sensor in the sensor array is patterned in the lower gap channel formed between the lower electrodes of the lower electrode layer; an upper touch sensor layer, the upper touch sensing The upper layer of the touch sensor array is patterned in the upper gap channel formed between the upper electrodes of the upper electrode layer. The arrangement of the touch sensor array is perpendicular to the arrangement direction of the upper touch sensor array, and the lower touch sensor array and the upper touch sensor array form a mutual capacitive touch for sensing a touch signal. Inductive unit, and the lower touch sensor array and the upper touch sensor array are electrically connected The touch signal circuit. The in-cell active matrix organic light emitting diode touch panel of claim 1, wherein the lower electrode layer is an OLED plate anode layer, and the upper electrode layer is an OLED plate cathode layer. The in-cell active-matrix organic light-emitting diode touch panel of claim 2, wherein the lower gap channel formed between the lower electrodes of the lower electrode layer is a first direction, the lower The touch sensor array is a scan signal sensor array of the lower gap channel disposed in the first direction; each of the upper electrode layers The upper gap channel formed between the upper electrodes is a second direction perpendicular to the first direction, and the upper touch sensor array is a driving signal sensor array of the upper gap channel disposed in the second direction. The in-cell active-matrix organic light-emitting diode touch panel of claim 2, wherein the lower gap channel formed between the lower electrodes of the lower electrode layer is a second direction, the lower The touch sensor array is a driving signal sensor array of the lower gap channel disposed in the second direction; the upper gap channel formed between the upper electrodes of the upper electrode layer is the first perpendicular to the second direction In the direction, the upper touch sensor array is a scan signal sensor array disposed in an upper gap channel in a first direction. The in-cell active-matrix organic light-emitting diode touch panel according to any one of the preceding claims, wherein the touch signal circuit is disposed on the TFT backplane.