TW201629720A - Touch display panel with shielding electrode - Google Patents

Abstract

The invention provides a touch display panel with shielding electrode. A display material layer is configured between a first substrate and a second substrate parallel to the first substrate. A thin film transistor layer is disposed at one surface of the second substrate that faces the display material layer. The thin film transistor layer includes a plurality of gate lines and a plurality of source lines. A touch sense electrode layer is disposed between the first substrate and the thin film transistor layer. The touch sense electrode layer has a plurality of sense electrodes to sense touch or approach of an object. A touch shield electrode layer is disposed between the thin film transistor layer and the touch sense electrode layer. The touch shield electrode layer has at least one shield electrode to shield the plurality of sense electrodes from noise of the thin film transistor layer.

Description

Touch display device with shielding electrode

The present invention relates to the technical field of touch display, and more particularly to a touch display device having a shielding electrode.

The in-cell touch display panel device has various display-related driving circuits (for example, a thin film transistor, a gate driving line, a data driving line, a pixel electrode, and a common electrode/common cathode/common) of the touch sensing electrode and the display panel. The anode, etc.) are very close, so the result of the touch detection is easily disturbed by the display signal. At the same time, since there is a large self-capacitance between the touch sensing electrode and the common electrode/common cathode/common anode, it is easy to form an obstacle to touch detection.

In view of the above problems, the conventional technique cuts the common electrode layer into a plurality of sensing electrodes and operates in time division with the display driving signal. However, this limits the resolution and size of the touch screen, which not only affects the display quality but also greatly increases the display drive control design, adjustment and display panel manufacturing difficulty, which seriously reduces the production yield, and further reduces the cost and control. Therefore, there is still room for improvement in the conventional in-cell touch display panel device.

The object of the present invention is mainly to provide a shielding electrode The touch display device can shield the interference of the display signal and eliminate the huge capacitive effect between the touch sensing electrode and the display related electrode, and utilize the same potential to reflect the electric field to enhance the sensing sensitivity of the touch sensing electrode. Detect distance.

According to a feature of the present invention, the present invention provides a cover The touch display device includes a first substrate, a second substrate, a thin film transistor layer, a touch sensing electrode layer, a touch shielding electrode layer, a display control driving circuit, and a touch sensing Control circuit. The second substrate is disposed in parallel with the first substrate, and a layer of display material is sandwiched therebetween. The thin film transistor layer is disposed on a surface of the second substrate facing the display material layer, and the thin film transistor layer comprises a plurality of thin film transistors and a plurality of gate driving lines and a plurality of data driving lines. The touch sensing electrode layer has a plurality of touch sensing electrodes for sensing a touch or proximity of an external object, and the touch sensing electrode layer is implanted between the first substrate and the thin film transistor layer. The touch shielding electrode layer has at least one touch shielding electrode layer disposed between the touch sensing electrode layer and the thin film transistor layer. The display control driving circuit sequentially drives the plurality of gate driving lines and the plurality of data driving lines to perform a display operation. The touch sensing control circuit is connected to the plurality of touch sensing electrodes and the at least one touch shielding electrode.

According to another feature of the invention, the invention proposes The touch display device of the shielding electrode comprises an encapsulation layer, a substrate, a thin film transistor layer, a touch sensing electrode layer, a touch shielding electrode layer, a display control driving circuit, and a touch sensing control circuit. The substrate is disposed in parallel with the encapsulation layer with a layer of display material interposed therebetween. The thin film transistor layer is implanted on one side of the substrate facing the display material layer, and the thin film transistor layer comprises a plurality of thin film transistors and a plurality of gate driving lines and a plurality of data driving lines. The touch sensing electrode layer has a plurality of touch sensing electrodes for sensing a touch or proximity of an external object, and the touch sensing electrode layer is implanted between the encapsulation layer and the thin film transistor layer. The touch shielding electrode layer has at least one touch shielding electrode layer disposed between the touch sensing electrode layer and the thin film transistor layer. The display control driving circuit sequentially drives the plurality of gate driving lines and the plurality of data driving lines to perform a display operation. The touch sensing control circuit is connected to the plurality of touch sensing electrodes and the at least one touch shielding electrode.

100‧‧‧Touch display device with shielding electrode

110‧‧‧First substrate

120‧‧‧second substrate

130‧‧‧Display material layer

140‧‧‧Thin film transistor layer

150‧‧‧Touch sensing electrode layer

160‧‧‧Touch shielding electrode layer

170‧‧‧Lighting layer

180‧‧‧Color filter layer

190‧‧‧ polarizing layer

141‧‧‧ pixel drive circuit

151‧‧‧Touch sensing electrode

161‧‧‧Touch shielding electrode

171‧‧‧ shading lines

153‧‧Amplifier

155‧‧‧ Impedance

173‧‧‧Light block

S1, S2, S3, ..., S _N ‧‧‧ touch sensing electrodes

G1, G2, G3‧‧‧ gate drive line

D1, D2, D3‧‧‧ data drive line

210‧‧‧ pixel area

220‧‧‧Display control drive circuit

M1, M2, M3,...,M _N ‧‧‧Touch shielding electrode

31-1~31-N‧‧‧ Conductive metal grid

310‧‧‧Electrical wire

32-1~32-N‧‧‧Wiring

320‧‧‧conductive metal wire

610‧‧‧Touch sensing control circuit

620‧‧‧Selection switch group

900,1000,1100,1200,1300,1400,1500,1600‧‧‧ Touch display device with shielding electrodes

1110‧‧‧Vcom and touch shielding electrode layer

930‧‧‧Display layer

960‧‧‧ cathode layer

970‧‧‧anode layer

950‧‧‧thin film layer

971‧‧‧anode element electrode

951‧‧‧ pixel drive circuit

9511‧‧‧ gate

9513‧‧‧汲/source

9515‧‧‧Source/Bungee

931‧‧‧ hole transmission sublayer

933‧‧‧Lighting layer

935‧‧‧Electronic transmission sublayer

1410‧‧‧Cathode and touch shielding electrode layer

933-1‧‧‧Red light emitting layer

933-2‧‧‧Blue light layer

933-3‧‧‧Green light layer

1510‧‧‧Encapsulation layer

1A is a schematic view showing the lamination of a touch display device having a shield electrode according to the present invention.

Fig. 1B is a schematic view of a light shielding layer.

2 is a schematic diagram of a touch sensing electrode layer, a touch shielding electrode layer, and a thin film transistor layer of the present invention.

3 is a schematic view of a touch sensing electrode layer of the present invention.

4 is a touch sensing electrode layer, a touch shielding electrode layer, and a thin film of the present invention; Another schematic of the membrane transistor layer.

FIG. 5 is still another schematic diagram of the touch sensing electrode layer, the touch shielding electrode layer, and the thin film transistor layer of the present invention.

FIG. 6 is a schematic diagram of the operation of the touch sensing electrode layer and the touch shielding electrode layer of the present invention.

FIG. 7 is another schematic diagram of operation of the touch sensing electrode layer and the touch shielding electrode layer of the present invention.

FIG. 8 is another schematic diagram of operation of the touch sensing electrode layer and the touch shielding electrode layer of the present invention.

FIG. 9 is another schematic diagram of a stack of a touch display device having a shield electrode according to the present invention.

FIG. 10 is still another stacked schematic diagram of a touch display device having a shield electrode according to the present invention.

FIG. 11 is a schematic diagram of a further stacking of a touch display device having a shield electrode according to the present invention.

FIG. 12 is another schematic diagram of a stack of a touch display device having a shield electrode according to the present invention.

FIG. 13 is still another stacked schematic diagram of a touch display device having a shield electrode according to the present invention.

14 is a schematic diagram of a further stacking of a touch display device having a shield electrode according to the present invention.

FIG. 15 is another schematic diagram of a stack of a touch display device having a shield electrode according to the present invention.

16 is a touch display device with a shielding electrode of the present invention A stacked schematic.

1 is a touch display device with a shielding electrode according to the present invention; A stacking diagram of 100 is placed. The touch display device 100 having a shielding electrode has a first substrate 110, a second substrate 120, a display material layer 130, a thin film transistor layer 140, a touch sensing electrode layer 150, and a touch shielding electrode layer. 160, a light shielding layer 170, a color filter layer 180, and a polarizing layer 190.

The first substrate 110 and the second substrate 120 are preferably glass In the substrate or the polymer film substrate, the first substrate 110 and the second substrate 120 are disposed in parallel with each other to sandwich the display material layer 130 between the two substrates 110 and 120. The display material layer 130 is a liquid crystal display layer.

The thin film transistor layer 140 is implanted on the surface of the second substrate 120 To the surface of the display material layer 130, the thin film transistor layer 140 includes a plurality of pixel driving circuits 141 and a plurality of gate driving lines (not shown) and a plurality of data driving lines (not shown). Each of the pixel driving circuits 141 corresponds to a pixel, and drives a corresponding pixel driving circuit 141 according to a display pixel signal and a display driving signal to perform a display operation. The plurality of gate drive lines and the plurality of source drive lines define a plurality of pixel regions, each pixel region corresponding to a light transmissive block.

The gate of the pixel driving circuit 141 has at least one thin film transistor The pole (not shown) is connected to a gate drive line. Depending on the design of the driver circuit, there is at least one 电/source (not shown) of the thin film transistor in the control circuit. Connected to a data driving line, at least one source/drain (not shown) of the thin film transistor in the pixel driving circuit 141 is connected to the pixel electrode of a pixel region. The pixel electrode forms a capacitance with a corresponding common electrode (Vcom). The liquid crystal deflection angle is changed by changing the voltage of the capacitor. In FIG. 1, it is an IPS (In panel switching) panel, so the common electrode (Vcom) is provided on the side of the pixel driving circuit 141.

The touch sensing electrode layer 150 has a plurality of touch sensing electrodes The pole 151 senses the touch or proximity of an external object. The touch sensing electrode layer 150 is implanted between the first substrate 110 and the thin film transistor layer 140.

The touch shielding electrode layer 160 has at least one touch shielding The electrode 161 is disposed between the touch sensing electrode layer 150 and the thin film transistor layer 140.

The black matrix 170 is located on the first substrate The surface of the 110 facing the side of the display material layer 130 is formed by a plurality of light-shielding lines 171 as shown in FIG. 1B. The plurality of light shielding lines 171 are disposed in a first direction (X-axis direction) and a second direction (Y-axis direction) to form a plurality of light transmitting blocks 173. The plurality of light-shielding lines 171 are made of a black insulating material. The plurality of shading lines 171 are disposed according to the relative positions of the gate driving lines and the source driving lines of the thin film transistor layer 140. The first direction and the second direction are perpendicular to each other, so the light shielding layer 170 is also referred to as a black matrix.

The color filter layer 180 is located on the light shielding layer 170 The material layer 130 is displayed on one side. The polarizing layer 190 is located on the other side of the first substrate 110 facing the display material layer 130.

As shown in FIG. 1 , the touch display device with the shielding electrode The 100 further includes an amplifier 153 having a gain greater than zero, and the amplifier 153 is electrically connected between the touch sensing electrode layer 150 and the touch shielding electrode layer 160. An impedance 155 can be disposed between the output of the amplifier 153 and the touch shielding electrode layer 160. The impedance 155 is preferably a capacitor to block the DC component of the touch signal from flowing to the touch shielding electrode layer 160. In other embodiments, the impedance 155 is a programmable resistor or capacitor; in another embodiment, the impedance 155 can be a resistor having a small resistance or a resistance of 0, or replaced by a conductive line. .

2 is a schematic diagram of the touch sensing electrode layer 150, the touch shielding electrode layer 160, and the thin film transistor layer 140 of the present invention. As shown in FIG. 1 and FIG. 2 , the touch sensing electrode layer 150 is implanted between the first substrate 110 and the thin film transistor layer 140 . The touch sensing electrode layer 150 includes a plurality of touch sensing electrodes (S1, S2, S3, ..., S _N ). As shown in FIG. 2, the plurality of gate drive lines (G1, G2, G3, ...) and the plurality of data drive lines (D1, D2, D3, ..) define a plurality of pixel regions 210. Each of the touch sensing electrodes (S1, S2, S3, ..., S _N ) corresponds to a plurality of pixel regions 210.

As shown in FIG. 2, the touch display device with the shielding electrode The 100 further includes a display control driving circuit 220 for sequentially driving the plurality of gate driving lines (G1, G2, G3, ...) and a plurality of data driving lines (D1, D2, D3, ..) to perform display. jobs.

In FIG. 2, the plurality of touch sensing electrodes (S1, S2, S3, ..., S _N ) are rectangular. In other embodiments, the plurality of touch sensing electrodes (S1, S2, S3, ..., S _N ) may be polygonal, circular, elliptical, star, wedge, radial, triangular, pentagon, Hexagon, octagon, diamond, or square. The plurality of touch sensing electrodes (S1, S2, S3, ..., S _N ) are formed by a grid of conductive metal lines. The material of the conductive metal wire forming the plurality of sensing electrodes (S1, S2, S3, ..., S _N ) is chromium, bismuth, molybdenum, aluminum, silver, copper, titanium, nickel, lanthanum, cobalt, tungsten. , magnesium (Mg), calcium (Ca), potassium (K), lithium (Li), indium (In), alloys of the above materials or use of lithium fluoride (LiF), magnesium fluoride (MgF2), and lithium oxide ( Li2O) is combined with aluminum (Al).

As shown in FIG. 2, the at least one touch shielding electrode (M1, M2, M3, ..., M _N ) corresponds to one touch sensing electrode (S1, S2, S3, ..., S _N ). The at least one touch shielding electrode (M1, M2, M3, ..., M _N ) is rectangular. In other embodiments, the at least one touch shielding electrode (M1, M2, M3, . . . , M _N ) may be polygonal, circular, elliptical, star, wedge, radial, triangular, pentagon, Hexagon, octagon, diamond or square. The at least one touch shielding electrode (M1, M2, M3, ..., M _N ) is formed by a grid of conductive metal lines. The material of the conductive metal wire forming the at least one touch shielding electrode (M1, M2, M3, ..., M _N ) is chromium, bismuth, molybdenum, aluminum, silver, copper, titanium, nickel, lanthanum, cobalt. , tungsten, magnesium (Mg), calcium (Ca), potassium (K), lithium (Li), indium (In), alloys of the above materials or using lithium fluoride (LiF), magnesium fluoride (MgF2), and oxidation Lithium (Li2O) is combined with aluminum (Al).

The conductive metal wire forming the conductive metal grid of the plurality of touch sensing electrodes (S1, S2, S3, ..., S _N ) and the at least one touch shielding electrode (M1, M2, M3, .. ., M _N) of conductive metal mesh conductive metal line is implanted in the thin film transistor layer 140, the plurality of strip electrode driving gate lines (G1, G2, G3, ... ) and the plurality of data drive lines The relative position of (D1, D2, D3, ..). The wire diameter of the metal wire of the conductive metal grid of the at least one touch shielding electrode (M1, M2, M3, ..., M _N ) is greater than or equal to the plurality of touch sensing electrodes (S1, S2, S3, . .., S _N ) The wire diameter of the metal wire of the conductive metal grid.

FIG. 3 is a schematic diagram of the touch sensing electrode layer 150 of the present invention. As shown in FIG. 2 and FIG. 3, the touch sensing electrode layer 150 includes a plurality of touch sensing electrodes (S1, S2, S3, ..., SN). Each of the touch sensing electrodes (S1, S2, S3, ..., SN) corresponds to a plurality of pixel regions 210.

As shown in FIG. 3, in the touch sensing electrode layer 150, the Each of the plurality of touch sensing electrodes (S1, S2, S3, ..., SN) is composed of a plurality of conductive metal wires 310, wherein each of the conductive metals The grids 31-1~31-N are connected via a conductive metal line 320 for transmitting electrical signals sensed by the touch sensing electrodes (S1, S2, S3, ..., SN).

As shown in FIG. 3, the complex in the touch sensing electrode layer 150 The plurality of conductive metal lines 310, 320 are disposed in the first direction (X) and the second direction (Y). Wherein the first direction is perpendicular to the second direction. The plurality of conductive metal lines 310, 320 are divided into a first set of conductive metal lines 310 and a second set of conductive metal lines 320. The first set of conductive metal lines 310 form N polygonal conductive metal grids 31- 1~31-N, where N is a natural number. The conductive metal wires in each of the polygonal conductive metal grids 31-1 to 31-N are electrically connected together, and there is no between any two polygonal conductive metal grids 31-1 to 31-N. The connection is such that a single-layer inductive touch pattern structure is formed on the touch sensing electrode layer 150.

In this embodiment, the plurality of touch sensing electrodes (S1, S2, S3, ..., SN) are respectively composed of the N polygonal conductive metal grids 31-1 to 31-N. The N polygonal conductive metal grids 31-1~31-N are rectangular For example, the position of the plurality of conductive metal lines 310, 320 is implanted in a plurality of gate drive lines (G1, G2, G3, ...) and a plurality of data drive lines (D1, D2, D3, ..) at the relative position.

The second set of inductive conductor lines 320 form N traces 32-1~32-N, each of the N traces is electrically connected to a corresponding polygonal conductive metal grid 31-1~31-N, and each trace 32-1~32 -N is not connected.

4 is another schematic diagram of the touch sensing electrode layer 150, the touch shielding electrode layer 160, and the thin film transistor layer 140 of the present invention. 4 is different from FIG. 2 in that the at least one touch shielding electrode (M1, M2, M3, ..., M _N ) is not composed of a conductive metal mesh but is formed of a transparent conductive material. That is, the touch shielding electrode layer 160 is formed of a transparent conductive material. The transparent conductive material is ITO, ZTO, ETO, conductive polymer, carbon nanotube, graphene, or a silver film having a thickness of less than 50 nanometers (nm).

FIG. 5 is still another schematic diagram of the touch sensing electrode layer 150, the touch shielding electrode layer 160, and the thin film transistor layer 140 of the present invention. The difference between FIG. 5 and FIG. 4 is that the plurality of touch sensing electrodes (S1, S2, S3, ..., S _N ) are not formed by a conductive metal mesh but by a transparent conductive material. That is, the touch sensing electrode layer 150 and the touch shielding electrode layer 160 are formed of a transparent conductive material. The transparent conductive material is ITO, ZTO, ETO, conductive polymer, carbon nanotube, graphene, or a silver film having a thickness of less than 50 nanometers (nm). The touch sensing electrodes of the plurality of touch sensing electrodes (S1, S2, S3, ..., S _N ) are polygonal, circular, elliptical, star, wedge, radial, triangular , pentagon, hexagon, octagon, rectangle, diamond or square.

FIG. 6 is a schematic diagram of the operation of the touch sensing electrode layer 150 and the touch shielding electrode layer 160 of the present invention. The touch display device with the shielding electrode further includes a touch sensing control circuit 610 and a selection switch group 620. The touch sensing control circuit 610 is connected to the plurality of touch sensing electrodes (S1, S2, S3, . . . , S _N ) via the selection switch group 620. The touch sensing control circuit 610 is connected to the at least one touch shielding electrode (M1, M2, M3, . . . , M _N ) via the amplifier 153 and the impedance 155. In FIG. 6, the touch shielding electrode layer 160 includes only one touch shielding electrode (M1).

The selection switch group 620 sequentially connects the touch signals on the selected plurality of touch sensing electrodes (S1, S2, S3, ..., S _N ) to the amplifier 151, and is processed by the amplifier 153 and output to the amplifier 153. The touch shields the electrode layer 160.

As shown in FIG. 6, the selection switch group 620 will select the selected touch. The touch signal on the sensing electrode S1 is connected to the amplifier 153 having a gain greater than zero, processed by the amplifier 153, and output to the touch shielding electrode layer 160. The size of the signal transmitted from the amplifier 153 to the at least one touch shielding electrode M1 is approximately the same as the size of the touch sensing signal on the touch sensing electrode S1. The potential difference between the touch shielding electrode layer 160 and the selected touch sensing electrode S1 is zero, that is, the potentials of the two are synchronously fluctuating and at the same potential, and the capacitance effect between the two is equivalent to zero. Therefore, when a finger touches the touch sensing electrode S1, the capacitance between the touch sensing electrode S1 and the touch shielding electrode layer 160 is equivalent to zero. The capacitance between the finger and the touch sensing electrode S1 may occupy more components in the sensing signal due to the above-mentioned treatment of the equivalent elimination of the capacitor. Therefore, the present invention can more accurately detect and distinguish the touch position than the prior art. At the same time, the touch shielding electrode layer 160 can shield the noise from the display driving circuit.

In other embodiments, the touch sensing control circuit 610 can The ground signal is coupled to the at least one touch shielding electrode M1. In this way, the effect of shielding the noise from the display driving circuit can also be achieved.

FIG. 7 is another schematic diagram of the operation of the touch sensing electrode layer 150 and the touch shielding electrode layer 160 of the present invention. 7 is different from FIG. 6 in that the touch shielding electrode layer 160 has L touch shielding electrodes (MI1, M2, . . . , M _L ). Correspondingly, there are L amplifiers (153-1, 153-2, ..., 153-L), L impedances (155-1, 155-2, ..., 155-L) and L selection switch groups. (620-1, 620-2, ..., 620-L). As shown in FIG. 7, the touch sensing electrodes S1, S _J , . . . , S _N can simultaneously perform touch sensing.

FIG. 8 is another schematic diagram of the operation of the touch sensing electrode layer 150 and the touch shielding electrode layer 160 of the present invention. The difference between FIG. 8 and FIG. 7 is that the L touch shielding electrodes (M1, M2, . . . , M _L ) of the touch shielding electrode layer 160 and the plurality of touch sensing electrodes (S1, S2, S3, . ..,S _N ) Corresponding way. It is well established by those skilled in the art based on the disclosure of the present invention and will not be described again.

FIG. 9 is another stacked diagram of a touch display device 900 having a shield electrode according to the present invention. Figure 9 is similar to Figure 1. The main difference is that the touch sensing electrode layer 150 is disposed on one surface of the light shielding layer 170 facing the display material layer 130. The touch shielding electrode layer 160 is disposed on a surface of the color filter layer 180 facing the display material layer 130. As shown in FIG. 9 , the touch sensing electrode layer 150 is disposed under the light shielding layer 170 , and the touch shielding electrode layer 160 is disposed under the color filter layer 180 . The at least one touch shielding electrode (M1, M2, M3, ..., M _N ) may be formed by a grid of conductive metal lines as shown in FIG. 2, or as shown in FIG. 4, the at least one The touch shielding electrodes (M1, M2, M3, ..., M _N ) are formed of a transparent conductive material.

FIG. 10 is a schematic diagram of another layer of a touch display device 1000 having a shield electrode according to the present invention. 10 is similar to FIG. 9 but the main difference is that the touch sensing electrode layer 150 is disposed on one surface of the color filter layer 180 facing the display material layer 130. The touch shielding electrode layer 160 is disposed on the touch sensing electrode layer 150. Facing one side of the display material layer 130. As shown in FIG. 10 , the touch sensing electrode layer 150 is disposed under the color filter layer 180 , and the touch shielding electrode layer 160 is disposed under the touch sensing electrode layer 150 . The plurality of touch sensing electrodes (S1, S2, S3, ..., S _N ) and the at least one touch shielding electrode (M1, M2, M3, ..., M _N ) are formed of a transparent conductive material .

FIG. 11 is a schematic diagram of a further stacking of a touch display device 1100 having a shielding electrode according to the present invention. 11 is similar to FIG. 10 but the main difference is that the touch shielding electrode layer 160 is disposed in the Vcom layer to form a Vcom and touch shielding electrode layer 1110. As shown in FIG. 11, the at least one touch shielding electrode (M1, M2, M3, ..., M _N ) is formed of a transparent conductive material. At this time, the power of the display circuit needs to be separated from the power supply of the touch detection circuit to prevent signals from interfering with each other.

12 is a touch display with a shielding electrode of the present invention Another stacked schematic of the device 1200. The touch display device 1200 having a shield electrode is mainly different from FIG. 9 in the display layer 930, the cathode layer 960, the anode layer 970, and the thin film transistor layer 950. The display layer 930 is an organic light emitting diode layer. Since the display layer 930 is an organic light emitting diode layer, the polarizing layer 190 in FIG. 9 can be omitted.

The cathode layer 960 is located at the first substrate 110 facing the display One side of layer 930. At the same time, the cathode layer 960 is located between the first substrate 110 and the display layer 930. The cathode layer 960 is formed of a metal conductive material. Preferably, the cathode layer 960 is formed of a metal material having a thickness of less than 50 nanometers (nm) selected from one of the group consisting of chromium, bismuth, nickel, molybdenum, aluminum (Al), Silver (Ag), copper, magnesium (Mg), calcium (Ca), yttrium, cobalt, tungsten, potassium (K), lithium (Li), indium (In), an alloy of the above materials or lithium fluoride (LiF) , magnesium fluoride (MgF2), lithium oxide (Li2O) and Al combined. Since the thickness of the cathode layer 960 is less than 50 nm, the light generated by the display layer 930 can still penetrate the cathode layer 960 to display an image on the first substrate 110. The cathode layer 960 is electrically connected in a single piece, and the cathode layer 960 receives current from the anode pixel electrode 971.

The color filter layer 180 is located on the light shielding layer 170 Display layer 930 side.

The thin film transistor layer 950 is located on the second substrate 120 On one side of the display layer 930 side. The thin film transistor layer 950 has a plurality of gate drive lines (not shown), a plurality of source drive lines (not shown), and a plurality of pixel drive circuits 951. Each of the pixel driving circuits 951 corresponds to a pixel, and drives a corresponding pixel driving circuit 951 according to a display pixel signal and a display driving signal to perform a display operation. The plurality of gate drive lines and the plurality of source drive lines define a plurality of pixel regions.

According to the design of the pixel drive circuit 951, such as 2T1C Designed by 2 thin film transistors and 1 storage capacitor as a pixel driver circuit, 6T2C is designed by 6 thin film transistors and 2 storage capacitors. road. In the pixel driving circuit 951, at least one thin film transistor gate 9511 is connected to a gate driving line (not shown), and at least one thin film transistor is connected to the source/source 9513 in the control circuit according to the design of the driving circuit. To a source driving line (not shown), at least one source/drain 9515 of the thin film transistor in the pixel driving circuit 951 is connected to a corresponding anode pixel electrode 971 in the anode layer 970.

The anode layer 970 is located on the thin film transistor layer 950. One side of the display layer 930. The anode layer 970 has a plurality of anode pixel electrodes 971. Each anode pixel electrode of the plurality of anode pixel electrodes 971 corresponds to a pixel driving transistor of the pixel driving circuit 951 of the thin film transistor layer 950, that is, each of the plurality of anode pixel electrodes An anode pixel electrode is connected to the source/drain of the pixel driving transistor of the corresponding pixel driving circuit 951.

The display layer 930 includes a hole transmission sublayer (hole A transporting layer (HTL) 931, an illuminating layer 933, and an electron transporting layer (ETL) 935. The display layer 930 preferably produces white light and is filtered using the color filter 150 to produce three primary colors of red, blue, and green.

13 is a touch display with a shielding electrode of the present invention A further schematic diagram of the stacking of device 1300. 13 is similar to FIG. 10 with the main difference being the display layer 930, the cathode layer 960, the anode layer 970, and the thin film transistor layer 950.

14 is a touch display with a shielding electrode of the present invention A further schematic diagram of the stacking of device 1400. Figure 14 is similar to Figure 11, the touch The shielding electrode layer is disposed in the cathode layer to form a cathode and a touch shielding electrode layer 1410.

15 is a touch display with a shielding electrode of the present invention Another stacked schematic of the device 1500. 15 is similar to FIG. 13 but the main difference is that in FIG. 15, the red light-emitting layer 933-1, the blue light-emitting layer 933-2, and the green light-emitting layer 933-3 are used, so that it is not necessary to use a color filter (color filter). ), and a black matrix. In other embodiments, since there is no color filter and a black matrix, the upper substrate is not absolutely necessary, and the water-oxygen barrier material can be directly deposited by chemical vapor deposition or sputtering. Or a vapor deposition method can form a thin film encapsulation layer 1510 over the touch sensing electrode layer 150; this embodiment is particularly suitable for a flexible organic light emitting diode touch display panel.

16 is a touch display with a shielding electrode of the present invention Another stacked schematic of device 1600. 16 is similar to FIG. 15. The touch shielding electrode layer is disposed in the cathode layer to form a cathode and a touch shielding electrode layer 1410.

It can be seen from the foregoing description that the spirit of the present invention is to implant a shielding electrode layer 160 between the touch sensing electrodes (S1, S2, S3, ..., S _N ) and the display related circuit, thereby shielding the display signal. interference. Further, the signal of the current touch sensing electrode is transmitted to the shielding electrode layer 160 via the control circuit so as to be nearly the same as the potential of the touch sensing electrode, thereby eliminating the huge capacitance effect between the display and the related electrode, and utilizing the same The reflection of the potential on the electric field enhances the sensing sensitivity and detection distance of the touch sensing electrode.

The above embodiments are merely examples for convenience of explanation. The scope of the claims is intended to be limited only by the scope of the claims.

100‧‧‧Touch display device with shielding electrode

110‧‧‧First substrate

120‧‧‧second substrate

130‧‧‧Display material layer

140‧‧‧Thin film transistor layer

150‧‧‧Touch sensing electrode layer

160‧‧‧Touch shielding electrode layer

170‧‧‧Lighting layer

180‧‧‧Color filter layer

190‧‧‧ polarizing layer

141‧‧‧ pixel drive circuit

151‧‧‧Touch sensing electrode

161‧‧‧Touch shielding electrode

171‧‧‧ shading lines

153‧‧Amplifier

155‧‧‧ Impedance

Claims (22)

A touch display device having a shielding electrode, comprising: a first substrate; a second substrate disposed parallel to the first substrate and sandwiching a display material layer therebetween; a thin film transistor layer, implanted The second substrate faces one side of the display material layer, the thin film transistor layer includes a plurality of thin film transistors and a plurality of gate driving lines and a plurality of data driving lines; and a touch sensing electrode layer having a plurality of contacts Controlling the sensing electrode to sense a touch or proximity of an external object, the touch sensing electrode layer being implanted between the first substrate and the thin film transistor layer; and a touch shielding electrode layer having at least one touch a shielding electrode layer is disposed between the touch sensing electrode layer and the thin film transistor layer; a display control driving circuit sequentially drives the plurality of gate driving lines and the plurality of data driving lines And performing a display operation; and a touch sensing control circuit connected to the plurality of touch sensing electrodes and the at least one touch shielding electrode. The touch display device with a shielding electrode according to claim 1, wherein the plurality of touch sensing electrodes are formed by a grid of conductive metal lines. The touch display device with a shielding electrode according to the second aspect of the invention, wherein the material of the conductive metal wire forming the plurality of sensing electrodes is chromium, germanium, molybdenum, aluminum, silver, copper, titanium, nickel, Antimony, cobalt, tungsten, magnesium (Mg), calcium (Ca), potassium (K), lithium (Li), indium (In), alloys of the above materials or use of lithium fluoride (LiF), magnesium fluoride (MgF2) And lithium oxide (Li2O) combined with aluminum (Al). The touch display device with a shielding electrode according to the third aspect of the invention, wherein the plurality of touch sensing electrodes are polygonal, circular, elliptical, star-shaped, wedge-shaped, radial, triangular, pentagonal, Hexagon, octagon, rectangle, diamond or square. The touch display device with a shielding electrode according to the fourth aspect of the invention, wherein the at least one touch shielding electrode of the touch shielding electrode layer is formed by a grid of conductive metal lines to form the plurality of The conductive metal wire of the sensing electrode is made of chromium, lanthanum, molybdenum, aluminum, silver, copper, titanium, nickel, lanthanum, cobalt, tungsten, magnesium (Mg), calcium (Ca), potassium (K), lithium (Li). Indium (In), an alloy of the above materials or a combination of lithium fluoride (LiF), magnesium fluoride (MgF2), and lithium oxide (Li2O) and aluminum (Al). The touch display device with the shielding electrode according to the fifth aspect of the invention, wherein the conductive metal lines forming the conductive metal grid of the plurality of touch sensing electrodes and the touch shielding electrodes are embedded in the A plurality of gate drive lines are corresponding to the plurality of data drive lines. The touch display device with the shielding electrode according to the sixth aspect of the invention, wherein the wire diameter of the metal wire of the conductive metal grid of the at least one touch shielding electrode is greater than or equal to the plurality of touch sensing electrodes The wire diameter of the metal wire of the conductive metal grid. The touch display device with a shielding electrode according to the second aspect of the invention, wherein the touch shielding electrode layer is formed of a transparent conductive material, and the transparent conductive material is ITO, ZTO, ETO, conductive polymer, and Carbon tube, graphene, or silver film with a thickness of less than 50 nanometers (nm). The touch display device with a shielding electrode according to the first aspect of the invention, wherein the plurality of touch sensing electrodes and the touch shielding electrode layer are formed of a transparent conductive material, and the transparent conductive material is ITO or ZTO. , ETO, conductive polymer, carbon nanotubes, graphene, or a silver film having a thickness of less than 50 nanometers (nm). The touch display device with a shielding electrode according to claim 9, wherein each of the plurality of touch sensing electrodes has a polygonal shape, a circular shape, an elliptical shape, a star shape, a wedge shape, and a width Shooting, triangle, pentagon, hexagon, octagon, rectangle, diamond or square. The touch display control device of claim 1 , wherein the touch sensing control circuit transmits at least one touch sensing signal on the touch sensing electrode to the at least one via a driving circuit Touch shielding electrode. The touch display device with a shield electrode according to claim 11, wherein the touch sensing control circuit transmits the signal size of the at least one touch shielding electrode to at least one touch of the touch sensing electrode. The control signal size is approximately the same. The touch display device with a shielding electrode according to the first aspect of the invention, wherein the touch sensing control circuit connects the ground signal to the at least one touch shielding electrode. The touch display device with a shielding electrode according to claim 1, wherein the display material layer is a liquid crystal display layer. The touch display device with a shielding electrode according to claim 1, wherein the display material layer is an organic light emitting diode layer. A touch display device having a shielding electrode, comprising: an encapsulation layer; a substrate disposed parallel to the encapsulation layer and sandwiching a display material layer therebetween; a thin film transistor layer disposed on the substrate surface Displaying one side of the material layer, the thin film transistor layer comprising a plurality of thin film transistors and a plurality of gate driving lines and a plurality of data driving lines; a touch sensing electrode layer having a plurality of touch sensing electrodes for sensing a touch or proximity of an external object, wherein the touch sensing electrode layer is implanted between the encapsulating layer and the thin film transistor layer; The shielding electrode layer has at least one touch shielding electrode, and the touch shielding electrode layer is implanted between the touch sensing electrode layer and the thin film transistor layer; a display control driving circuit drives the plurality of strips sequentially The gate driving line and the plurality of data driving lines perform a display operation; and a touch sensing control circuit connected to the plurality of touch sensing electrodes and the at least one touch shielding electrode. The touch display device with a shielding electrode according to claim 16, wherein the plurality of touch sensing electrodes are formed by a grid of conductive metal lines. The touch display device with a shielding electrode according to claim 17, wherein the material of the conductive metal wire forming the plurality of sensing electrodes is chromium, bismuth, molybdenum, aluminum, silver, copper, titanium, nickel, Antimony, cobalt, tungsten, magnesium (Mg), calcium (Ca), potassium (K), lithium (Li), indium (In), alloys of the above materials or use of lithium fluoride (LiF), magnesium fluoride (MgF2) And lithium oxide (Li2O) combined with aluminum (Al). The touch display device with a shielding electrode according to claim 18, wherein the plurality of touch sensing electrodes are polygonal, circular, elliptical, star-shaped, wedge-shaped, radial, triangular, pentagonal, Hexagon, octagon, rectangle, diamond or square. The touch display device with a shielding electrode according to claim 19, wherein the at least one touch shielding electrode of the touch shielding electrode layer is formed by a grid of conductive metal lines to form the plurality of The conductive metal wire of the sensing electrode is made of chromium, lanthanum, molybdenum, aluminum, silver, copper, titanium, nickel, lanthanum, cobalt, tungsten, magnesium (Mg), calcium (Ca), potassium (K), lithium (Li). , indium (In), alloy of the above materials Or a combination of lithium fluoride (LiF), magnesium fluoride (MgF2), and lithium oxide (Li2O) and aluminum (Al). The touch display device with a shielding electrode according to claim 20, wherein the conductive metal lines forming the conductive metal grid of the plurality of touch sensing electrodes and the touch shielding electrodes are embedded in the A plurality of gate drive lines are corresponding to the plurality of data drive lines. The touch display device with the shielding electrode according to claim 21, wherein the wire diameter of the metal wire of the conductive metal grid of the touch shielding electrode is greater than or equal to the conductivity of the plurality of touch sensing electrodes. The wire diameter of the metal wire of the metal mesh.