TWI529594B - Organic electroluminescent device - Google Patents

Description

Organic electroluminescent device

The present invention relates to an in-cell touch device, and in particular to an embedded active matrix organic electroluminescent device.

At present, the touch function is generally used in a smart handheld device. Due to this functional technology, the operation of the handheld device becomes more free and user-friendly, and thus it is widely accepted and applied. With the continuous improvement of semiconductor technology and processes, research on integrating and integrating touch functions with liquid crystal elements has become increasingly popular. The integrated and integrated technology research and development route mainly includes two categories: In-cell mode and On-cell mode. Specifically, the In-cell method refers to embedding a touch sensor into a liquid crystal element such as an OLED (Organic Light-Emitting Diode); the On-cell method refers to a liquid crystal image. A touch sensor and associated thin layer material are attached to the OLED, and the protective glass is finally covered.

In the prior art, the capacitive electric field sensing principle is generally used, and the touch panel in the touch sensor is used to achieve the active touch function. The specific touch principle process is as follows: the capacitive touch panel includes two layers of glass or film stacked one on top of the other, and one layer of glass is provided with a plurality of diamond-shaped sensors for detecting X in the two-dimensional coordinate system. coordinate. Another layer of glass A sensor with a plurality of diamond patterns for detecting the Y coordinate in the two-dimensional coordinate system. Each diamond sensor includes a pair of capacitors, each having a symbiotic capacitance between them, and generating an electrical boundary on the surface of the sensor, projecting to the outside of the screen through a non-conductor such as glass or film. When the user touches the glass, the control wafer periodically reads the state of each ITO electrode in the two-dimensional coordinate system of the panel, first provides a pulse voltage to a certain driving ,, and then from the corresponding sensing 埠A corresponding voltage is read and converted to a control chip to determine whether the panel has a touch action.

From the structural analysis, the On-cell method generally integrates the touch sensor into the covered protective glass, or arranges it on the protective glass. Such settings inevitably cause the thickness of the entire device to be further reduced, and a series of problems caused by too large a thickness, such as low transmittance and rainbow ripple, are successively produced.

Intuitively, the In-cell method has the advantages of thinner and lighter weight than the On-cell method, which can reduce manufacturing cost and overall thickness, and avoids various defects of the On-cell method. Therefore, the In-cell method is the future development direction of integrated integration in this field, and therefore a technology and device capable of successfully and effectively integrating the touch sensor into the OLED organic light-emitting diode are needed.

In view of this, the inventors have conceived and further studied and finally invented an organic electroluminescent device.

The present invention provides an organic electroluminescent device whose main purpose is to achieve integrated integration of the technology in the art by changing the arrangement of the devices and the electrode structure, thereby reducing manufacturing costs and reducing the overall thickness of the device.

In order to overcome the defects of the prior art and achieve the above object, the present invention provides an organic electroluminescent device, comprising: a glass substrate, a thin film transistor disposed on the glass substrate, and an organic layer disposed on the thin film transistor. a light emitting layer and a glass cover plate disposed on the organic light emitting layer.

An organic electroluminescent device of the present invention is further improved in that the organic light-emitting layer further includes an anode layer and a touch sensing layer, the anode layer includes a plurality of anodes, and a gap channel is formed between the plurality of anodes, and the touch is transmitted. The sensing layer includes a plurality of touch sensing electrodes, and the touch sensing electrodes are respectively accommodated in the gap channels, and the touch sensing electrodes are connected through the bridge medium.

An organic electroluminescent device of the present invention is further improved in that the gap channel comprises a plurality of first gap channels extending in the first direction, and a plurality of second gap channels extending in the second direction.

The organic electroluminescent device of the present invention is further improved in that the touch sensing electrode comprises a plurality of first touch sensing electrodes and a plurality of second touch sensing electrodes, and the first touch sensing electrodes are arranged The second touch sensing electrodes are arranged on the second gap channel in the first gap channel.

An organic electroluminescent device of the present invention is further improved in that the first touch sensing electrode and the second touch sensing electrode are insulated from each other.

An organic electroluminescent device of the present invention is further improved in that each of the first touch sensing electrodes is directly connected to each other, and each of the second touch sensing electrodes is connected to the conductive connection through the bridging medium.

An organic electroluminescent device of the present invention is further improved in that each of the second touch sensing electrodes is directly connected to each other, and each of the first touch sensing electrodes is connected to the conductive connection through the bridging medium.

An organic electroluminescent device of the present invention is further improved in that the bridging medium is an electrode conducting member.

The beneficial effects of the organic electroluminescent device of the present invention are: based on changing the electrode connection structure in the touch sensing layer, and utilizing the design gap between the anodes in the organic light emitting layer, the touch sensing layer is successfully placed in the organic The electric field induction is formed inside the illuminating layer, and finally the thinner and lighter integrated integration of the touch sensing technology is realized.

The advantages of the present invention: full use of existing design gaps, and changes to the traditional internal structure settings, simple and effective implementation of technology leap.

The present invention has been described in connection with the preferred embodiments of the present invention in accordance with the accompanying drawings.

〔this invention〕

1‧‧‧ glass substrate

2‧‧‧film transistor

3‧‧‧Organic light-emitting layer

31‧‧‧ clearance channel

4‧‧‧glass cover

5‧‧‧ touch sensing layer

51‧‧‧First touch sensing electrode

52‧‧‧Second touch sensing electrode

6‧‧‧ anode layer

7‧‧‧Electrode conduction parts

1 is a schematic overall structural diagram of an organic electroluminescent device according to the present invention; FIG. 2 is a schematic diagram of an internal structure of an organic electroluminescent device according to the present invention; 3 is a schematic view showing the patterning of the anode layer in the organic electroluminescent device of the present invention; FIG. 4 is a schematic view showing the distribution of the first preferred embodiment of the touch sensor layer in the organic electroluminescent device of the present invention; A schematic diagram of a second preferred embodiment of a touch sensor layer in an organic electroluminescent device.

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 your review 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: The present invention is based on the principle of capacitive electric field induction as a fundamental scientific realization. In this regard, since this scientific principle has been widely used in the art, and the implementation process of the technical principle has been described in detail in the technical background of the present application, it will not be further described in this specific embodiment.

In the conventional prior art, a thin film transistor is generally disposed on a glass substrate, an organic light emitting diode is disposed on the thin film transistor, and an upper cover glass is disposed on the organic light emitting diode. Wherein, the touch sensing layer is integrated into the upper cover glass or is disposed on the upper cover glass. Such an arrangement inevitably causes the thickness of the entire device to be further reduced, and a series of problems caused by too large a thickness, such as low transmittance and rainbow pattern, are successively produced.

In view of this, the present invention improves the prior art as follows: Referring to Figure 1, the present invention provides an organic electroluminescent device. The device integrates the touch sensing layer and the OLED organic light emitting layer 3, and completely changes the current traditional touch design mode from the overall structure. In this way, simplified structure and overall thinning are achieved, and various defects caused by too large a thickness are avoided.

The following is a preferred internal architecture design of the present invention: as shown in FIG. 1 , an organic electroluminescent device includes: a glass substrate 1, a thin film transistor 2, an organic light emitting layer 3, and a cover glass 4, wherein the thin film transistor 2 is disposed on the glass substrate 1, the organic light-emitting layer 3 is disposed on the thin film transistor 2, and the glass cover 1 is disposed on the organic light-emitting layer 3. The organic light-emitting layer comprises an organic light-emitting diode and a touch sensing layer.

2 and FIG. 3, the bottom layer of the OLED organic light-emitting layer 3 is generally an anode layer 6, and the TFT film transistor 2 is under the anode layer 6. The anode layer 6 includes a plurality of anodes, that is, RGB distributed in FIG.

It is worth mentioning that there is a gap channel 31 between the anodes RGB on the anode layer 6. The first touch sensing electrode 51 and the second touch of the touch sensing layer 5 are used in the present invention. The sensing electrode 52 is disposed in the gap channel 31 and passes through the bridging medium, that is, the electrode conducting member 7, and the sensing electrodes are respectively connected in a set manner to successfully form the sensing layer 5 to be accommodated in the anode layer 6. The structural design inside.

The following is the specific arrangement of the sensing electrodes: As shown in FIG. 3, the gap passage 31 of the anode layer 6 includes a plurality of first gap passages extending in the first direction, and a plurality of second gap passages extending in the second direction. Here, the first direction is defined as the horizontal direction in the drawing, and the second direction is defined as the vertical direction in the drawing.

Referring to FIG. 4 or FIG. 5, the first touch sensing electrodes 51 are arranged in the first gap channel, and the second touch sensing electrodes 52 are arranged in the second gap channel. The specific arrangement must be a regular setting, and the setting positions of the respective sensing electrodes in the gap channel 31 should be in the same straight line to facilitate the conduction connection between the electrodes.

The following are two specific ways to turn on the sensing electrode:

1. Referring to FIG. 4, the first touch sensing electrodes 51 in the lateral direction are directly connected to each other, and the second touch sensing electrodes 52 in the vertical direction are connected in a jumper manner and through the electrodes. The device 7 is electrically connected, and the electrode conducting member 7 is not in contact with the first touch sensing electrode 51 and directly passes over the first touch sensing electrode 51.

2. Referring to FIG. 5, the longitudinal second touch sensing electrodes 52 are directly connected to each other, and the lateral first touch sensing electrodes 51 are connected by a jumper and through the electrodes. The component 7 is electrically connected, and the electrode conducting member 7 is not in contact with the second touch sensing electrode 52 and directly straddles the second touch sensing electrode 52.

Through the above two methods, a capacitive induced electric field can be successfully generated in the touch sensing layer 5.

The following is the implementation process of the organic electroluminescent device of the present invention: First, the first touch sensing electrode 51 and the second touch sensing electrode 52 of the touch sensing layer 5 are disposed in the gap channel 31 of the anode layer 6. After that, a sensing electrode conduction mode is selected and connected in the above-mentioned conduction mode. After the connection is successful, the TFT film transistor control electrode is turned on. After being turned on, the first touch sensing electrode 51 detects the lateral coordinate in the two-dimensional coordinate system, and the second touch sensing electrode 52 detects the two-dimensional coordinate. The longitudinal coordinates in the system form a capacitive induced electric field and are projected to the outside of the screen through non-conductors such as glass or film. When the user touches the glass, the control chip periodically reads the state of each of the sensing electrodes in the two-dimensional coordinate system of the panel, first provides a pulse voltage to a certain driving port, and then responds from the corresponding sensing.埠 Reading a corresponding voltage, after being converted and providing to the control chip, it can be judged whether the panel touches. After this process, the integrated design of the touch sensing layer and the organic light emitting layer is finally realized, and the in-cell touch is completed.

In summary, the organic electroluminescent device of the present invention is based on changing the electrode connection structure in the touch sensing layer 5, and embedding the touch sensing layer 5 by using the design gap between the anodes in the organic light emitting layer 3. In the organic light-emitting layer 3 and forming an electric field induction, a thinner and lighter integrated integration of the touch sensing technology is finally realized.

The present invention has been described in detail above with reference to the embodiments of the drawings, and various modifications of the invention can be made by those skilled in the art in light of the above description. Thus, certain details in the embodiments should not be construed as a The scope of the invention is defined by the scope of the appended claims.

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.

1‧‧‧ glass substrate

2‧‧‧film transistor

3‧‧‧Organic light-emitting layer

4‧‧‧glass cover

5‧‧‧ touch sensing layer

Claims (5)

An organic electroluminescent device comprises: a glass substrate, a thin film transistor disposed on the glass substrate, an organic light emitting layer disposed on the thin film transistor, and a photoluminescent layer disposed on the organic light emitting layer The OLED layer further includes an anode layer and a touch sensing layer, the anode layer includes a plurality of anodes, and a plurality of anodes form a gap channel, the touch sensing layer The touch sensing electrodes are respectively disposed in the gap channel, and some of the touch sensing electrodes are directly connected to each other, and the remaining portions of the touch sensing electrodes are bridged. Media connection. The organic electroluminescent device of claim 1, wherein the gap channel comprises a plurality of first gap channels extending in a first direction, and a plurality of second gap channels extending in a second direction; The touch sensing electrode includes a plurality of first touch sensing electrodes and a plurality of second touch sensing electrodes, wherein the first touch sensing electrodes are arranged in the first gap channel, and the second touch sensing layer The electrodes are arranged in the second gap channel. The organic electroluminescent device of claim 2, wherein the first touch sensing electrode and the second touch sensing electrode are insulated from each other. The organic electroluminescent device of claim 2, wherein each of the first touch sensing electrodes is directly connected to each other, and the second touch sensing electrodes pass between the electrodes. The bridge media jumper is connected to the conductive connection; or each of the second touch sensing electrodes is directly connected to each other, and each of the first touch sensing electrodes is connected to the conductive connection through the bridge medium. The organic electroluminescent device of claim 4, wherein the bridging medium is an electrode conducting member.