TWM467954U - Embedded type OLED touch display panel structure with metal sensing layer - Google Patents

Description

In-line organic light-emitting diode touch display panel structure with metal sensing layer

The present invention relates to a structure of a display screen with a touch panel, and more particularly to an in-cell organic light-emitting diode touch display panel structure with a metal sensing layer.

Among the many types of flat panel displays, the Organic Light Emitting Diode (OLED) is an emerging new flat display technology. OLED was published in 1987 by Eastman Kodak Co.. It has the characteristics of thin thickness, light weight, self-illumination, low driving voltage, high efficiency, high contrast, high color saturation, fast response, and flexibility. Therefore, it is a display technology that is quite optimistic after TFT-LCD.

In recent years, the demand for high-quality, full-color flat-panel displays in mobile communications, digital products and digital TVs has increased rapidly. The OLED display not only has the advantages of thin, power-saving and full-color display of the LCD, but also has a wider viewing angle, active illumination, and faster response than the LCD.

Figure 1 is a conventional organic light emitting diode (Organic Light A schematic diagram of a basic structure of an Emitting Diode (OLED) display. The organic light emitting diode (OLED) display 100 includes a cathode layer 110, an organic light emitting diode layer 120, an anode layer 130, a thin film transistor layer 140, and a lower substrate. And a structural layer such as an upper substrate 160, wherein the organic light emitting diode layer 120 further comprises a hole transporting layer (HTL) 121, an emitting layer 123, and an electron transporter. Electron transporting layer (HTL) 125.

The principle of illuminating the organic light-emitting diode is to inject electrons and holes from the cathode layer 110 and the anode layer 130 respectively by the action of an applied electric field, and the holes pass through the hole transport sub-layer 121 and the electrons pass through the electron transport sub-layer 125. The light-emitting layer 123 having fluorescent characteristics is entered. Then, the internal excitation generates photons, and the excited photons are released and returned to the ground state. The released energy generates different colors of light according to different luminescent materials, which creates the luminescence phenomenon of the OLED.

The conventional touch-type flat panel display directly overlaps the touch panel and the flat display. Since the laminated touch panel is a transparent panel, the image can penetrate the display image of the touch panel superposed on the upper surface. Then use the touch panel as the medium or interface for input. However, this conventional technique is required to increase the total weight of a touch panel when superimposing, so that the weight of the flat display is greatly increased, which does not meet the requirements of the current market for the lightness and thinness of the display. When the touch panel and the flat display are directly stacked, the thickness of the touch panel itself is increased, the light transmittance is reduced, and the reflectance and the haze are increased, so that the quality of the screen display is greatly reduced.

In response to the aforementioned shortcomings, the touch panel display adopts an embedded touch technology. The main development direction of embedded touch technology can be divided into On-Cell and In-Cell technologies. The technology of On-Cell Touch is to first make the sensor of the touch panel on the film, and then attach it to the glass of the upper substrate or directly use the transparent conductive material (ITO) on the upper substrate. In-Cell Touch technology integrates touch components into the display panel, so that the display panel itself has a touch function, so there is no need to separately attach or assemble the touch panel. It was developed by the display panel factory.

On-Cell Touch technology is to install a sensing electrode layer on the glass substrate above the display panel or use the upper substrate to add a touch sensing electrode; not only increase the cost, but also increase the process procedure, which easily leads to a decrease in process yield and a rise in process cost. . Therefore, the conventional organic light emitting diode display panel structure and the On-Cell Touch still have room for improvement.

The main purpose of the present invention is to provide an in-cell OLED touch display panel structure with a metal sensing layer, which can greatly increase the transmittance and reduce the weight and thickness of the display panel, and can greatly save material cost and Processing costs.

According to one of the features of the present invention, the present invention proposes an in-cell OLED touch display panel structure with a metal sensing layer, including an upper substrate, a lower substrate, a light shielding layer, a sensing electrode layer, and an organic light emitting diode. a polar body layer and a thin film transistor layer. The upper substrate and the lower substrate are flat The paired arrangement sandwiches the organic light emitting diode layer between the two substrates. The light shielding layer is located on a surface of the upper substrate facing one side of the organic light emitting diode layer, and the light shielding layer is composed of a plurality of light shielding lines. The sensing electrode layer is located on a surface of the light shielding layer on one side of the organic light emitting diode layer, and the sensing electrode layer is composed of a plurality of sensing conductor lines. The thin film transistor layer is located on a surface of the lower substrate opposite to one side of the organic light emitting diode layer; wherein a position of the plurality of sensing conductor lines corresponds to a position of the plurality of light shielding lines of the light shielding layer Settings.

100‧‧‧Organic LED display

110‧‧‧ cathode layer

120‧‧‧Organic LED layer

130‧‧‧anode layer

140‧‧‧Thin film transistor layer

150‧‧‧Substrate

160‧‧‧Upper substrate

121‧‧‧ hole transmission sublayer

123‧‧‧Lighting layer

125‧‧‧Electronic transmission sublayer

200‧‧‧In-line organic light-emitting diode touch display panel structure

210‧‧‧Upper substrate

220‧‧‧lower substrate

230‧‧‧Organic LED layer

240‧‧‧Lighting layer

250‧‧‧Induction electrode layer

260‧‧‧Color filter layer

270‧‧ ‧ protective layer

280‧‧‧ cathode layer

290‧‧‧anode layer

300‧‧‧thin film layer

291‧‧‧anode element electrode

301‧‧‧ pixel driving circuit

3011‧‧‧ gate

3013, 3015‧‧‧bungee/source

231‧‧‧ hole transmission sublayer

233‧‧‧Lighting layer

235‧‧‧Electronic transmission sublayer

241‧‧‧ shading lines

243‧‧‧Area

410, 420‧‧‧Inductive conductor lines

410‧‧‧The first set of induction conductor lines

420‧‧‧Second group of induction conductor lines

411~41N‧‧‧Four-sided mesh area

421~42N‧‧‧Wiring

600‧‧‧In-line organic light-emitting diode touch display panel structure

610‧‧‧ cathode layer

620‧‧‧anode layer

630‧‧‧Organic LED layer

631‧‧‧ hole transmission sublayer

633‧‧‧Lighting layer

635‧‧‧Electronic transmission sublayer

611‧‧‧ cathode pixel electrode

1 is a schematic diagram showing the basic structure of a conventional organic light emitting diode display.

FIG. 2 is a perspective view showing the structure of an in-cell OLED touch display panel having a metal sensing layer.

Figure 3 is a schematic illustration of a conventional light shielding layer.

Figure 4 is a schematic illustration of the inventive sensing electrode layer.

FIG. 5 is a schematic view of the present light shielding layer and the sensing electrode layer.

FIG. 6 is another perspective view of the in-cell OLED touch display panel structure with a metal sensing layer.

The present invention relates to an in-cell organic light emitting diode touch display panel structure with a metal sensing layer. FIG. 2 shows an in-cell OLED touch display panel structure 200 with a metal sensing layer. As shown in the figure, the in-cell OLED touch display panel structure 200 with a metal sensing layer includes an upper substrate 210, a lower substrate 220, an organic light emitting diode layer 230, and a light shielding layer ( A black matrix 240, a sensing electrode layer 250, a color filter 260, an overcoat 270, a cathode layer 280, an anode layer 290, and a thin film transistor layer 300.

The upper substrate 210 and the lower substrate 220 are preferably glass substrates. The upper substrate 210 and the lower substrate 220 are disposed in parallel pairs to sandwich the organic light-emitting diode layer 230 between the two substrates 210 and 220.

The black matrix 240 is located on a surface of the upper substrate 210 facing one side of the organic light emitting diode layer 230, and the light shielding layer 240 is composed of a plurality of light shielding lines.

FIG. 3 is a schematic illustration of a conventional conventional light shielding layer 240. As shown in FIG. 3, the conventional light-shielding layer 240 is formed by a line of opaque black insulating material to form a plurality of light-shielding lines 241, and the plurality of light-shielding lines 241 of the black insulating material are vertically distributed to the conventional light-shielding layer. Therefore, the conventional light shielding layer is called a black matrix. A color filter is distributed in a region 243 between the black insulating material lines.

In the present invention, a sensing electrode layer 250 is disposed between the conventional light shielding layer 240 and the color filtar 260, and a touch sensing pattern structure is disposed thereon, so that the display panel is not required. The sensing electrode layer is disposed on the upper glass substrate or the lower glass substrate, thereby reducing the cost, reducing the process procedure, improving the process yield and reducing the process cost.

FIG. 4 is a schematic diagram of the inventive sensing electrode layer 250. Figure 4 As shown, the sensing electrode layer 250 is located on a surface of the light shielding layer 240 facing one side of the organic light emitting diode layer 230. The sensing electrode layer 250 is composed of a plurality of sensing conductor lines 410 and 420, wherein the plurality The positions of the strip sensing conductor lines 410, 420 are set corresponding to the positions of the plurality of shading lines 241 of the light shielding layer 240.

As shown in FIG. 4, the plurality of sensing conductor lines 410, 420 of the sensing electrode layer 250 are disposed in a first direction (X) and a second direction (Y). Wherein the first direction is perpendicular to the second direction. The plurality of sensing conductor lines 410, 420 of the sensing electrode layer 250 are made of a conductive metal material or an alloy material. Wherein, the conductive metal material or alloy material is one of the following: chromium, bismuth, aluminum, silver, copper, titanium, nickel, bismuth, cobalt, tungsten, magnesium (Mg), calcium (Ca), potassium (K) Lithium (Li), indium (In), and alloys thereof.

The plurality of sensing conductor lines 410, 420 are divided into a first group of sensing conductor lines 410 and a second group of sensing conductor lines 420. The first group of sensing conductor lines 410 form N polygonal mesh areas 411~41N, wherein , N is a positive integer. The sensing conductor lines in each of the polygonal mesh areas are electrically connected together, and any two polygonal mesh areas are not connected to form a single layer inductive touch pattern structure on the sensing electrode layer 250.

The polygonal mesh area 411~41N is one of the following shapes: a triangle, a rectangle, a square, a diamond, a pentagon, a hexagon, an octagon, and a circle. In the present embodiment, the N polygonal mesh areas 411 to 41N are exemplified by a rectangle, and the positions of the plurality of sensing conductor lines are set corresponding to the positions of the plurality of light shielding lines 241 of the light shielding layer 240.

The second group of sensing conductor lines 420 form N traces 421~42N, each of the N traces is electrically connected to a corresponding polygonal mesh area 411~41N, and each trace 431~43N is not connected.

FIG. 5 is a schematic diagram of the present light shielding layer 240 and the sensing electrode layer 250. As shown in FIG. 5 , a schematic view of the light-shielding layer 240 overlapping the sensing electrode layer 250 is viewed from the organic light-emitting diode layer 230 toward the first substrate 210 .

The first set of inductive conductor lines 410 are connected to the second set of inductive conductor lines 420. Therefore, the first group of sensing conductor lines 410 can be formed with a single layer inductive touch pattern structure on the sensing electrode layer 250. The line widths of the first group of sensing conductor lines 410 and the second group of sensing conductor lines 420 are preferably less than or equal to the line width of the plurality of light shielding lines 241 when the first substrate 210 is directed to the organic light emitting diode layer 230. When viewed in the direction, the first group of sensing conductor lines 410 and the second group of sensing conductor lines 420 can be shielded by the plurality of shading lines 241, and the user only sees the plurality of shading lines 241, and does not see the The first set of inductive conductor lines 410 and the second set of inductive conductor lines 420.

The color filter 260 is located between the plurality of light-shielding lines 241 of the light-shielding layer 240 and the surface of the plurality of light-shielding lines 241.

The over coat 270 is located on the surface of the color filter 260.

The thin film transistor layer 300 is located on a surface of the lower substrate 220 facing one side of the organic light emitting diode layer (OLED) 230. The thin film transistor layer has K gate driving lines and L source driving lines, and drives the corresponding pixel driving circuit 301 according to a display driving signal and a display pixel signal. The pixel drives the transistor and the pixel capacitor to perform a display operation, wherein K and L are positive integers. The positions of the K gate drive lines and the L source drive lines are set according to the positions of the plurality of light shielding lines 241 of the black matrix 240.

The thin film transistor layer 300 includes a plurality of pixel driving circuits 301 in addition to a plurality of gate driving lines and a plurality of source driving lines. The thin film transistor layer 300 drives the corresponding pixel driving circuit 301 according to a display pixel signal and a display driving signal to perform a display operation.

Depending on the design of the pixel driving circuit 301, for example, the 2T1C is designed as a pixel driving circuit 301 by two thin film transistors and one storage capacitor, and the 6T2C is designed as a pixel driving circuit 301 by 6 thin film transistors and 2 storage capacitors. . The gate 3011 of the pixel driving circuit 301 has at least one thin film transistor connected to a gate driving line (not shown). According to the design of the driving circuit, at least one thin film transistor has a drain/source 3013 in the control circuit. Connected to a source driving line (not shown), a drain/source 3015 of at least one thin film transistor in the pixel driving circuit 301 is connected to a corresponding anode pixel electrode 291 in the anode layer 290.

The cathode layer 280 is located on a side of the upper substrate 210 facing the organic light emitting diode layer 230. At the same time, the cathode layer 280 is located between the upper substrate 210 and the organic light emitting diode layer 230. The cathode layer 280 is formed of a metal conductive material. Preferably, the cathode layer 280 is formed of a metal material having a thickness of less than 50 nanometers (nm) selected from one of the group consisting of aluminum (Al), silver (Ag), and magnesium (Mg). ), calcium (Ca), potassium (K), lithium (Li), indium (In), and alloys thereof or using lithium fluoride (LiF), magnesium fluoride (MgF2), oxidation Lithium (LiO) is combined with Al. Since the thickness of the cathode layer 280 is less than 50 nm, the light generated by the organic light emitting diode layer 230 can still penetrate the cathode layer 280, and an image can be displayed on the upper substrate 210. The cathode layer 280 is electrically connected to the entire sheet and thus can be used as a shield. At the same time, the cathode layer 280 also receives current from the anode pixel electrode 291.

The anode layer 290 is located on one side of the thin film transistor layer 300 facing the organic light emitting diode layer 230. The anode layer 290 has a plurality of anode pixel electrodes 291. Each of the anode pixel electrodes 291 corresponds to a pixel driving transistor of the pixel driving circuit 301 of the thin film transistor layer 300, that is, each anode pixel electrode of the plurality of anode pixel electrodes corresponds to The pixel/drain 3013 of the pixel driving transistor of the pixel driving circuit 301 is connected to form a pixel electrode of a specific color, such as a red pixel electrode, a green pixel electrode, or a blue pixel electrode. Or the white pixel electrode used in this case.

The organic light emitting diode layer 230 includes a hole transporting layer (HTL) 231, an emitting layer 233, and an electron transporting layer (HTL) 235. The organic light emitting diode layer 230 preferably produces white light and is filtered using the color filter 260 to produce three primary colors of red, blue, and green.

FIG. 6 is a perspective view of a built-in OLED touch display panel structure 600 of the present invention. The main difference from FIG. 2 is that the cathode layer 610 is aligned with the position of the anode layer 620. The cathode layer 610 has a plurality of cathode pixel electrodes 611. Each cathode pixel electrode 611 is a pixel drive of the pixel drive circuit 301 of the thin film transistor layer 300 Corresponding to the electro-optical crystal, that is, each cathode pixel electrode of the plurality of cathode pixel electrodes is connected to the source/drain 3013 of the pixel driving transistor of the corresponding pixel driving circuit 301 to form a cathode. A pixel electrode of a specific color, such as a red pixel electrode, a green pixel electrode, or a blue pixel electrode or a white pixel electrode used in the present case.

The cathode layer 610 of FIG. 6 is aligned with the anode layer 620, and the hole transporting layer (HTL) 631 of the organic light-emitting diode layer 630 is matched to the cathode layer 610 and the anode layer 620. The position of the electron transporting layer (HTL) 635 is also reversed. The cathode layer 610 has a plurality of cathode pixel electrodes 611, and each cathode pixel electrode of the plurality of cathode pixel electrodes 611 and the source/drain of the pixel driving transistor of the corresponding pixel driving circuit connection.

It can be seen from the foregoing description that the present invention can form a single-layer inductive touch pattern structure on the sensing electrode layer 250, which has the advantage that no sensing electrode is disposed on the upper glass substrate or the lower glass substrate of the organic light emitting diode touch display panel. Layer, which reduces costs and reduces process procedures. At the same time, the average light transmittance of the electrode points made by the indium tin oxide material (ITO) is only about 90%, and the position of the polygonal mesh area 411~41N and the position of the traces 421~42N of the present creation are Corresponding to the position of the plurality of light-shielding lines 241 of the light-shielding layer 240, the light transmittance is not affected, so the average light transmittance of the present invention is much better than the prior art. When the organic light emitting diode display panel is embedded in the embedded organic light emitting diode display panel structure with the metal sensing layer of the present invention, the brightness of the organic light emitting diode display panel can be made better than the panel of the prior art. brighter.

The above-described embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

200‧‧‧In-line organic light-emitting diode touch display panel structure

210‧‧‧Upper substrate

220‧‧‧lower substrate

230‧‧‧Organic LED layer

240‧‧‧Lighting layer

250‧‧‧Induction electrode layer

260‧‧‧Color filter layer

270‧‧ ‧ protective layer

280‧‧‧ cathode layer

290‧‧‧anode layer

300‧‧‧thin film layer

291‧‧‧anode element electrode

301‧‧‧ pixel driving circuit

3011‧‧‧ gate

3013, 3015‧‧‧bungee/source

231‧‧‧ hole transmission sublayer

233‧‧‧Lighting layer

235‧‧‧Electronic transmission sublayer

Claims (13)

An in-cell OLED touch display panel structure having a metal sensing layer, comprising: an upper substrate; a lower substrate, wherein the upper substrate and the lower substrate are arranged in parallel pairs to form an organic light emitting diode layer Between the two substrates; a light shielding layer on the surface of the upper substrate on one side of the organic light emitting diode layer, the light shielding layer is composed of a plurality of light shielding lines; a sensing electrode layer is located at the surface a surface of the light shielding layer opposite to one side of the organic light emitting diode layer, wherein the sensing electrode layer is composed of a plurality of sensing conductor lines; and a thin film transistor layer on a surface of the lower substrate for the organic light emitting diode a surface on one side of the bulk layer; wherein a position of the plurality of sensing conductor lines is disposed corresponding to a position of the plurality of light shielding lines of the light shielding layer. An in-cell OLED touch display panel structure having a metal sensing layer as described in claim 1, wherein the plurality of sensing conductor lines are divided into a first group of sensing conductor lines, and a first Two sets of inductive conductor lines, the first set of inductive conductor lines forming N polygonal mesh areas, wherein N is a positive integer, and the inductive conductor lines in each of the polygonal mesh areas are electrically connected together, and any two The polygonal mesh areas are not connected to each other to form a single-layer inductive touch pattern structure on the sensing electrode layer. An in-cell OLED touch display panel structure with a metal sensing layer as described in claim 2, wherein the second group of sensing conductor lines form N traces, and the N traces Each of the traces is electrically connected to a corresponding polygonal mesh area, and no two traces are connected. An in-cell OLED touch display panel structure having a metal sensing layer as described in claim 3, wherein the plurality of sensing conductor lines of the sensing electrode layer are in a first direction and a The second direction is set. The in-cell OLED touch display panel structure with a metal sensing layer according to claim 4, wherein the first direction is perpendicular to the second direction. The in-cell OLED touch display panel structure with a metal sensing layer according to claim 5, wherein the polygonal mesh area is one of the following shapes: a triangle, a rectangle, a square, Diamond, pentagon, hexagon, octagon, round. The in-cell OLED touch display panel structure with a metal sensing layer according to claim 6, wherein the plurality of sensing conductor wires are made of a conductive metal material or an alloy material. The in-cell organic light emitting diode touch display panel structure with a metal sensing layer according to claim 7, wherein the conductive metal material is one of the following: chromium, bismuth, aluminum, silver , copper, titanium, nickel, ruthenium, cobalt, tungsten, magnesium (Mg), calcium (Ca), potassium (K), lithium (Li), indium (In), and alloys thereof. The in-cell OLED touch display panel structure with a metal sensing layer as described in claim 8 , wherein the thin film transistor layer has K gate driving lines and L source driving lines According to a display driving signal and a display pixel signal, the pixel driving transistor and the pixel capacitor of the corresponding pixel driving circuit are driven to perform a display operation, wherein K and L are positive integers. The in-cell OLED touch display panel structure of claim 9, wherein the positions of the K gate drive lines and the L source drive lines correspond to the light shielding layer Set by the position of a plurality of shading lines. An in-cell OLED touch display panel structure having a metal sensing layer as described in claim 10, further comprising: a color filter layer disposed on the light-shielding layer facing the organic light-emitting layer a surface on one side of the polar layer; and a protective layer on the surface of the color filter layer. The in-cell OLED touch display panel structure of claim 11, further comprising: a cathode layer on a surface of the protective layer facing one side of the organic light emitting diode layer And an anode layer on a side of the thin film transistor layer facing the organic light emitting diode layer, the anode layer having a plurality of anode pixel electrodes, each anode pixel electrode of the plurality of anode pixel electrodes It is connected to the source/drain of the corresponding pixel driving transistor of the pixel driving circuit. The in-cell OLED touch display panel structure of claim 11, further comprising: a cathode layer on a side of the thin film transistor layer facing the organic light emitting diode layer a surface of the cathode layer having a plurality of cathode pixel electrodes, each cathode pixel electrode of the plurality of cathode pixel electrodes and a source/drain of a pixel driving transistor of the corresponding pixel driving circuit And an anode layer on a side of the protective layer facing the organic light emitting diode layer.