TWM498326U - Display device capable of both fingerprint identification and touch detection - Google Patents

Description

Display device with fingerprint recognition and touch detection

This creation is about a structure of a display screen, especially a display device that combines fingerprint recognition and touch detection.

Modern consumer electronic devices are often equipped with a touchpad as one of their input devices. The touchpad can be divided into resistive, capacitive, sonic, and optical types according to different sensing principles.

The touch-sensitive flat panel display directly overlaps the touch panel and the flat display, because the laminated touch panel is a transparent panel, so that the image can penetrate the display image of the touch panel stacked thereon. 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 market for light, thin, short, and small displays. Moreover, the direct overlay of the touch panel and the flat display not only increases the thickness of the touch panel itself, but also reduces the transmittance of light, and also increases the reflectivity and the haze, so that the quality of the screen display is greatly reduced.

In response to the aforementioned shortcomings, the touch flat panel display is embedded and embedded. Touch technology. The main development direction of embedded touch technology can be divided into On-Cell and In-Cell technologies. The On-Cell technology is a structure in which a sensor (sensor) of a projected capacitive touch technology is fabricated on the back side of a color filter (CF) (ie, attached to a polarizing plate surface) and integrated into a color filter. . In-Cell technology puts the sensing electrode into the structure of the LCD Cell. The main sensing methods currently used can be divided into three types: resistance (contact), capacitive and optical.

Because In-Cell Touch technology integrates touch components into display Within the display panel, so that the display panel itself has a touch function, there is no need to separately perform a process of bonding or assembling with the touch panel, and the technology is usually developed by the display panel factory.

At the same time, the sensing and comparison techniques of biometrics have matured and Widely used in personal identification and confirmation. Conventional biometric methods include fingerprint recognition, voiceprint recognition, iris recognition, and retina recognition.

Based on comprehensive considerations such as safety and comfort and identification efficiency, fingerprint identification Knowledge has become the mainstream of biometrics. Fingerprint identification usually involves scanning a user's fingerprint feature or image, and storing the image and/or the unique feature of the fingerprint, and then comparing the feature data of the scanned fingerprint with the established fingerprint reference information in the database. To identify or confirm the identity of the individual.

Fingerprint identification image input can be divided into optical scanning, thermal imaging Induction, capacitive sensing, etc. The optical scanning method is difficult to be applied to mobile electronic devices because of the large size of the device, the consideration of power consumption or the poor productivity of the process, and the generality of the process is not suitable for use in mobile electronic devices. The accuracy and reliability of thermal image sensing are not Jia can not become mainstream, so capacitive image sensing It has gradually become the mainstream technology for biometric identification of mobile electronic devices.

Figure 1 is a partial cross-sectional outline view of a conventional fingerprint sensing area, Shown in a capacitive fingerprint sensor, the interaction between a finger fingerprint and the capacitive fingerprint sensor. As shown in Figure 1, the fingerprint peak 14 of the fingerprint 13 is located on the sensing element. The capacitive fingerprint sensor has a plurality of sensing elements 11 that are pressed against a non-conductive protective layer 12. In the prior art, the thickness of the protective layer 12 is about 50 μm to 100 μm, so that the sensing element 11 can sense the fingerprint peak 14 of the fingerprint 13 .

However, if the protective layer 12 is made of a material such as glass and has a thickness of about When it is 50 μm to 100 μm, it is often caused by improper pressing of the finger and causes cracking. 2 is another partial cross-sectional profile view of a conventional fingerprint sensing region in which the thickness of the protective layer 12 is increased to 200 μm to 300 μm. In Fig. 2, it is only a schematic diagram, not the size of the actual components. When the thickness of the protective layer 12 is increased, the difference between the distance d1 between the fingerprint peak 14 and the sensing element 11-1 and the distance d2 between the fingerprint peak 14 and the sensing element 11-2 becomes small, that is, d1≒d2, The signal measured by the measuring element 11-1 and the sensing element 11-2 is not very different, so fingerprint sensing cannot be performed correctly. That is, when the thickness of the protective layer 12 is small in the prior art, the protective layer 12 is easily broken, and when the thickness of the protective layer 12 is large, the dilemma of fingerprint sensing cannot be correctly performed.

For the aforementioned dilemma, Apple uses sapphire as The material of the protective layer 12 prevents the protective layer 12 from being broken due to improper application of force; however, it further extends the problem of a substantial increase in cost.

In addition, conventional flat panel displays use a thin film transistor process (TFT process), in order to reduce the process and reduce the cost, the In-Cell Touch touch component is integrated into the display panel. However, the conventional pin-type capacitive fingerprint sensor adopts an integrated circuit process (IC process), which makes it difficult to integrate the capacitive fingerprint sensor into a conventional flat display. Therefore, there is still room for improvement in conventional touch display devices with fingerprint recognition.

The main purpose of the present invention is to provide a display device with both fingerprint recognition and touch detection, which can form more than one macro-sensing electrode block at different positions on a first thin film transistor and a sensing electrode layer. Perform fingerprint image detection or touch sensing. At the same time, since there is more than one macro-inductive electrode block at different positions, the present invention can recognize fingerprints of multiple fingers at the same time. Since the first thin film transistor and the sensing electrode layer are located in the visible area of the display device, the fingerprint image can be directly detected in the visible area of the display device, and the space outside the visible area is not required for fingerprint image detection, especially Handheld device for narrow bezels.

According to one of the features of the present invention, the present invention provides a display device having both fingerprint identification and touch detection, comprising a first substrate, a second substrate, a first thin film transistor and a sensing electrode layer, and a second Thin film transistor layer. The first substrate and the second substrate are arranged in a parallel pair to sandwich a display layer between the two substrates. The first thin film transistor and the sensing electrode layer are located on one side of the first substrate facing the display layer, and the first thin film transistor and the sensing electrode layer have a plurality of sensing electrodes for fingerprint sensing and touch sensing. Measurement.

11‧‧‧Sensor components

12‧‧‧Transparent protective layer

12‧‧‧ Fingerprint

14‧‧‧ Fingerprint peak

11-1, 11-2‧‧‧ sensing components

300‧‧‧Display device with fingerprint identification and touch detection

110‧‧‧First substrate

120‧‧‧second substrate

130‧‧‧Display material layer

140‧‧‧ first light shielding layer

150‧‧‧First film transistor and sensing electrode layer

160‧‧‧Color filter layer

170‧‧‧Protective layer

180‧‧‧Second thin film transistor layer

190‧‧‧First polarizing layer

200‧‧‧Second polarizing layer

141‧‧‧ first shading line

183‧‧‧ pixel crystal

153‧‧‧ Data readout selection component

155‧‧‧Common signal selection component

143‧‧‧Light block

151‧‧‧Induction electrode

A‧‧‧first endpoint

B‧‧‧second endpoint

C‧‧‧third endpoint

D‧‧‧first endpoint

E‧‧‧second endpoint

F‧‧‧third endpoint

151, 151-1, 151-2, 151-3, 151-4‧‧‧ sense electrodes

181‧‧‧ pixel block

183‧‧‧ pixel crystal

900‧‧‧Display device with fingerprint identification and touch detection

910‧‧‧Transparent electrode layer

1000‧‧‧Display device with fingerprint identification and touch detection

1010‧‧‧ second light shielding layer

1100‧‧‧Display device with fingerprint recognition and touch detection

1110‧‧‧ second light shielding layer

1120‧‧‧Transparent electrode layer

1200‧‧‧Display device with fingerprint identification and touch detection

930‧‧‧Display material layer

960‧‧‧ cathode layer

970‧‧‧anode layer

950‧‧‧Second thin film transistor layer

951‧‧‧ pixel drive circuit

9511‧‧‧ gate

9513‧‧‧汲/source

9515‧‧‧Source/Bungee

971‧‧‧anode element electrode

931‧‧‧ hole transmission sublayer

933‧‧‧Lighting layer

935‧‧‧Electronic transmission sublayer

1300‧‧‧Display device with fingerprint identification and touch detection

1400‧‧‧Display device with fingerprint identification and touch detection

933-1‧‧‧Red light emitting layer

933-2‧‧‧Blue light layer

933-3‧‧‧Green light layer

Figure 1 is a partial cross-sectional outline view of a conventional fingerprint sensing area.

2 is another partial cross-sectional profile view of a conventional fingerprint sensing zone.

FIG. 3 is a stacked diagram of an embodiment of a display device having both fingerprint recognition and touch detection.

FIG. 4 is a schematic view showing the first light shielding layer.

FIG. 5 is a schematic view showing the first thin film transistor and the sensing electrode layer of the present invention.

FIG. 6 is a schematic view showing the operation of the first thin film transistor and the sensing electrode layer.

FIG. 7 is another schematic diagram showing the operation of the first thin film transistor and the sensing electrode layer.

FIG. 8 is another schematic diagram of the first thin film transistor and the sensing electrode layer of the present invention.

FIG. 9 is a schematic diagram of the sensing electrode, the light transmitting block and the pixel block of the present invention.

FIG. 10 is a schematic diagram of a stacking of another embodiment of a display device having both fingerprint recognition and touch detection.

FIG. 11 is a stacked diagram of still another embodiment of a display device having both fingerprint recognition and touch detection.

FIG. 12 is a stacked diagram of still another embodiment of a display device having both fingerprint recognition and touch detection.

FIG. 13 is a stacked diagram of still another embodiment of a display device having both fingerprint recognition and touch detection.

FIG. 14 is a display device with fingerprint identification and touch detection according to the present invention. A stacked schematic view of still another embodiment.

FIG. 15 is a stacked diagram of still another embodiment of a display device having both fingerprint recognition and touch detection.

Figure 3 is a combination of fingerprint recognition and touch detection. As shown in FIG. 3, the display device 300 with fingerprint identification and touch detection includes a first substrate 110, a second substrate 120, and a display material layer 130. a first black matrix 140, a first thin film transistor and sensing electrode layer 150, a color filter 160, an overcoat layer 170, and a second thin film transistor layer 180, a first polarizer (190), and a second polarizer (200).

The first substrate 110 and the second substrate 120 are preferably glass 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. In the embodiment, the display material layer 130 is a liquid crystal layer.

The first black matrix 140 is located at the first base The surface of the board 110 facing the side of the display material layer 130 is composed of a plurality of first shading lines 141.

FIG. 4 is a schematic view showing the first light shielding layer 140. It is the same as the light shielding layer of a general liquid crystal display panel. As shown in FIG. 4, the first light shielding layer 140 is formed by a plurality of lines of black insulating material that are opaque to form a plurality of first light shielding lines 141. a plurality of first black lines of the black insulating material 141 are respectively disposed in a first direction and a second direction to form a plurality of transparent blocks 143. The plurality of first shading lines are disposed according to the relative positions of the gate driving lines and the source driving lines of the second thin film transistor layer 180. The first direction and the second direction are perpendicular to each other, so the light shielding layer 140 is also referred to as a black matrix.

Figure 5 is the first thin film transistor and the sensing electrode layer of the present invention. Schematic diagram of 150. The first thin film transistor and the sensing electrode layer 150 are located on one side of the first light shielding layer 140 facing the display layer 130. The first thin film transistor and the sensing electrode layer 150 have a plurality of sensing electrodes 151 for fingerprint sensing and touch sensing, wherein each sensing electrode 151 has a size of at least one pixel block (light transmitting region) The size of block 143).

The first thin film transistor and the sensing electrode layer 150 further comprise a plurality of data read selection elements 153, a plurality of common signal selection elements 155, a plurality of data read selection lines SG1 SG SGn, a plurality of sense signal read lines RD1, RD2, RD3, ..., a plurality of The signal selects the traces VG1~VGn.

The plurality of data read selection elements 153 read each data The selection element is corresponding to one sensing electrode 151, and each data reading selection element 153 has a first end point a, a second end point b and a third end point c, wherein the first end point a is electrically connected To the corresponding sensing electrode 151.

Each sensing electrode 151 corresponds to at least one common signal The number of selection elements 155, each of the common signal selection elements 155 has a first end point d, a second end point e and a third end point f, wherein the first end point d is connected to the corresponding sensing electrode 151.

Multiple data readouts select each of the traces SG1~SGn The data read select trace is coupled to the second endpoint b of the at least one corresponding data read select element 153.

Each of the plurality of sensing signal readout lines RD1, RD2, RD3, ... A sense signal readout line is coupled to the third endpoint c of the at least one corresponding data read select component 153.

Multiple common signals select each of the lines VG1~VGn The common signal selection trace is coupled to the second endpoint e of the at least one corresponding common signal selection component 155.

Each common signal line of a plurality of common signal lines Vcs Connected to the third endpoint f of the at least one corresponding common signal selection component 155. The plurality of sensing electrodes are divided into at least one sensing region and at least one non-sensing region by the plurality of data reading and selecting elements 153 and the plurality of common signal selecting elements 155.

Each of the data readout selection elements 153 is a first film The transistor, each of the common signal selection elements 155 is a second thin film transistor. a gate of the first thin film transistor corresponds to a second end point b of the data readout selection element 153, and a source/drain of the first thin film transistor corresponds to the data readout selection element 153 The first terminal a, the other source/drain of the first thin film transistor corresponds to the third terminal c of the data readout selection element 153.

Each of the plurality of sensing electrodes 151 is of the sensing electrode The shape is a polygon, a circle, an ellipse, a rectangle, or a square. The material of each of the plurality of sensing electrodes 151 is one of the following: ITO (Indium Tin Oxide) material, zinc oxide tin film (ZTO) material, ETO material, conductive polymer material, nano silver, carbon nanotube material, and graphene.

As shown in FIG. 5, the third end of the common signal selection component 155 The point f is connected to a common signal Vcs. In this embodiment, the common signal Vcs is preferably 0 volt. In other embodiments, the third endpoint f of each common signal selection component 155 can be respectively connected to different common signals (eg, common signals Vcs1, Vcs2, . . . , Vcsn, where n is a natural number. Common signal Vcsn can be a fixed voltage of a certain level or an alternating voltage signal that changes with time).

Figure 6 shows the first thin film transistor and the sensing electrode Schematic diagram of the operation of layer 150. It shows how to accurately sense the sensing signal on the sensing electrode 151-1.

When self-capacitance detection is performed, the data readout selects the trace SG1, a signal selection line Vsel1 is high potential, common signal selection traces VG2, VG3, ..., VGn is high potential, data readout selects traces SG2, SG3, ..., SGn is low potential, common signal When the selection line VG1 is low, the signal selection lines Vsel2, Vsel3, ... are low, the sensing signal of the sensing electrode 151-1 can be read.

Due to the data readout selection element 153 of the sensing electrode 151-2 The voltage of the sensing electrode 151-2 is the common signal Vcs, and the common signal selecting component 155 of the sensing electrode 151-4 is turned on, so the voltage of the sensing electrode 151-4 is the common signal Vcs, which can be The sensing electrode 151-1 forms a shielding effect to avoid the sensing of the sensing electrode 151-1 by the noise. The number causes interference.

Figure 7 shows the first thin film transistor and the sensing electrode layer. Another schematic diagram of the operation of 150. It shows how to accurately sense the sensing signals on the sensing electrode 151-1 and the sensing electrode 151-2.

When self-capacitance detection is performed, the data readout selects the trace SG1, a signal selection line Vsel1 is high, a signal selection line Vsel2 is high, the common signal selection lines VG2, VG3, ..., VGn is high potential, data read selection line SG2, SG3, .. When SGn is low, the common signal selection trace VG1 is low, and the signal selection line Vsel3, ... is low, and the sensing signals of the sensing electrode 151-1 and the sensing electrode 151-2 can be simultaneously read.

The data read selection element 153 due to the sensing electrode 151-3 The system is turned on, so the voltage of the sensing electrode 151-3 is the common signal Vcs. At the same time, the common signal selecting component 155 of the sensing electrode 151-4 and the sensing electrode 151-5 is turned on, so the voltages of the sensing electrode 151-4 and the sensing electrode 151-5 are the voltage Vcs, which can be applied to the sensing electrode 151-1. The sensing electrode 151-2 forms a shielding effect to prevent noise from interfering with the sensing signals of the sensing electrode 151-1 and the sensing electrode 151-2.

As shown in Figure 7, this creation can combine a plurality of sensing electrodes A macro sensing electrode block is formed. Wherein, one macro sensing electrode block may include at least one sensing electrode 151. In other embodiments, the macro sensing electrode block may include two different sensing electrodes 151, such as two sensing electrodes 151, 3×5 sensing electrodes 151, and the like. At the same time, the data read selection lines SG2, SG3, ..., SGn, signal selection lines Vsel1, Vsel2, Vsel3, ..., common signal selection traces VG1, VG2, VG3, ..., VGn The position of the macro sensing electrode block can also be changed by setting different rows.

At the same time, for the setting of the aforementioned signal line, the first thin film electro-crystal The body and sensing electrode layer 150 can simultaneously have more than one macro sensing electrode block at different positions for simultaneous fingerprint image detection or touch sensing. Since there are more than one macro sensing electrode blocks at different positions, the present invention can recognize the fingerprints of a plurality of fingers at the same time.

Figure 8 is the first thin film transistor and the sensing electrode layer of the present invention. Another schematic of 150. The common signal selection component 155 is changed to a PMOS transistor, and its working principle is the same as that of FIGS. 5-7, and therefore will not be described again.

Referring to FIG. 3 again, the color filter layer 160 is located at the first The thin film transistor and the sensing electrode layer 150 face one side of the display layer 130. The protective layer 170 is located on one side of the color filter layer 160 facing the display layer 130.

Referring to FIG. 3 and FIG. 9, the second thin film transistor layer 180 Located on the side of the second substrate 120 facing the display layer 130. The second thin film transistor layer 180 has K gate driving lines (G1, G2, ...) and L source driving lines (D1, D2, D3, ...), the K gate driving lines And L source driving lines are respectively disposed in the first direction and the second direction to form a plurality of pixel blocks 181. Each pixel block has a corresponding pixel transistor 183 and a pixel capacitor, and drives the corresponding pixel transistor and the pixel capacitor according to a display pixel signal and a display driving signal to perform display. Operation, where K and L are positive integers. The plurality of data read selection elements 153 and the positions of the plurality of common signal selection elements 155 correspond to the plurality of Pixel transistor 183. The plurality of data readout selection traces SG1 to SGn, the plurality of common signal selection traces VG1 to VGn, and the positions of the plurality of sensing signal readout lines RD1, RD2, RD3, ... correspond to the The position of the K gate drive lines and the L source drive lines.

The position of the K gate drive lines and the L source drive lines It is set according to the position of the plurality of first light-shielding lines 141 of the first light-shielding layer 140. That is, each pixel block 181 corresponds to one light transmissive block 143.

FIG. 9 is a schematic sensing electrode 151, a light transmitting block 143, and A schematic diagram of a pixel block 181. As shown in FIG. 9, the size of the sensing electrode 151 is the size of the two transparent blocks 143, that is, the size of the sensing electrode 151 is the size of the two pixel blocks 181. In the present invention, the size of each of the sensing electrodes 151 is at least one of the size of the light-transmissive block 143. Therefore, in other embodiments, one sensing electrode 151 can be a light-transmissive block 143 and two transparent portions. The light block 143, the three light transmissive blocks 143, and the like may be used.

Figure 10 is a combination of fingerprint recognition and touch detection. As shown in FIG. 10, the display device 900 with fingerprint identification and touch detection includes a first substrate 110, a second substrate 120, and a display material layer. 130, a first black matrix 140, a first thin film transistor and sensing electrode layer 150, a color filter 160, an overcoat layer 170, and a second thin film The crystal layer 180, a first polarizer layer 190, a second polarizer layer 200, and a transparent electrode layer 910. The main difference from FIG. 3 is that the transparent electrode layer 910 is added between the display material layer 130 and the protective layer 170, which is suitable for the VA type LCD panel.

Figure 11 is a kind of fingerprint creation and touch detection As shown in FIG. 11 , the display device 1000 having fingerprint identification and touch detection includes a first substrate 110 , a second substrate 120 , and a display material layer . 130, a first black matrix 140, a first thin film transistor and sensing electrode layer 150, a color filter 160, an overcoat layer 170, and a second thin film The crystal layer 180, a first polarizer layer 190, a second polarizer layer 200, and a second light shielding layer 1010. The main difference from FIG. 3 is that the second light shielding layer 1010 is added between the first thin film transistor and the sensing electrode layer 150 and the color filter 160. The second light shielding layer 1010 is composed of a plurality of second light shielding lines, and positions of the plurality of second light shielding lines are corresponding to positions of the plurality of first light shielding lines.

Figure 12 is a combination of fingerprint recognition and touch detection. As shown in FIG. 12, the display device 1100 with fingerprint identification and touch detection includes a first substrate 110, a second substrate 120, and a display material layer. 130, a first black matrix 140, a first thin film transistor and sensing electrode layer 150, a color filter 160, an overcoat layer 170, and a second thin film The crystal layer 180, a first polarizer layer 190, a second polarizer layer 200, a second light shielding layer 1110, and a transparent electrode layer 1120. The main difference from FIG. 10 is that the second light shielding layer 1110 is added between the first thin film transistor and the sensing electrode layer 150 and the color filter layer 160.

Figure 13 is a combination of fingerprint recognition and touch detection. A stacked schematic diagram of a further embodiment of the display device 1200 is shown. The main difference between FIG. 13 and FIG. 3 is the display material layer 930, the cathode layer 960, the anode layer 970, and the second thin film transistor layer 950.

The first substrate 110 and the second substrate 120 are preferably glass The substrate or the plastic substrate, the first substrate 110 and the second substrate 120 are disposed in parallel with each other to sandwich the display material layer 930 between the two substrates 110, 120. The display material layer 930 is preferably composed of an organic light emitting diode.

The second thin film transistor layer 950 is located on the second substrate 120 The surface of the display material layer 930 has a plurality of gate driving lines (not shown), a plurality of source driving lines (not shown), and a plurality of pixels. Drive circuit 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, each of the pixel regions corresponding to one of the light-emitting blocks 143.

According to the design of the pixel drive circuit 951, such as 2T1C The pixel drive circuit is designed by 2 thin film transistors and 1 storage capacitor. The 6T2C is designed as a pixel drive circuit by 6 thin film transistors and 2 storage capacitors. 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 in the anode layer 970. Polaroid electrode 971.

The cathode layer 960 is located on a surface of the first substrate 110 facing the display material layer 930 side. At the same time, the cathode layer 960 is located between the first substrate 110 and the display material 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 aluminum (Al), silver (Ag), and magnesium (Mg). ), calcium (Ca), potassium (K), lithium (Li), indium (In), an alloy of the above materials or using lithium fluoride (LiF), magnesium fluoride (MgF2), lithium oxide (Li ₂ O) and Al is combined. Since the thickness of the cathode layer 960 is less than 50 nm, the light generated by the display material 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 to the entire sheet and thus can be used as a shield. At the same time, the cathode layer 960 also receives current from the anode pixel electrode 971.

The anode layer 970 is located on the surface of the second thin film transistor layer 950 One side of the display material 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 second thin film transistor layer 950, that is, the plurality of anode pixel electrodes Each of the anode pixel electrodes is connected to a source/drain of the pixel driving transistor of the corresponding pixel driving circuit 951 to form a pixel electrode of a specific color, such as a red pixel electrode, a green pixel. Electrode, or blue pixel electrode.

The display material layer 930 includes a hole transporting layer (HTL) 931, an emission layer 933, and a Electron transporting layer (ETL) 935. The display material layer 930 preferably produces white light and is filtered using the color filter 160 to produce three primary colors of red, blue, and green.

Figure 14 is a kind of fingerprint creation and touch detection A stacked schematic diagram of another embodiment of the display device 1300 is shown. The main difference between FIG. 14 and FIG. 13 is that a second light shielding layer 1110 is disposed between the first thin film transistor and the sensing electrode layer 150 and the color filter layer 160.

Figure 15 is a combination of fingerprint recognition and touch detection. A schematic diagram of the stacking of the display device 1400 is further illustrated. The main difference between FIG. 15 and FIG. 13 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.

It can be seen from the foregoing description that the present invention can be used in the first thin film electro-crystal One or more macro sensing electrode blocks at different positions are formed on the body and the sensing electrode layer 150, and fingerprint image detection or touch sensing can be simultaneously performed. At the same time, since there are more than one macro sensing electrode blocks at different positions, the present invention can recognize the fingerprints of multiple fingers at the same time. Since the first thin film transistor and the sensing electrode layer 150 are in the visible area of the display device, the fingerprint image can be directly detected in the visible area of the display device without occupying the space of the non-visible area for fingerprint image detection. Especially suitable for handheld devices with narrow bezels.

The above embodiments are merely examples for convenience of explanation. The scope of the rights claimed by the author shall be subject to the scope of the patent application, not It is limited to the above embodiment.

300‧‧‧Display device with fingerprint identification and touch detection

110‧‧‧First substrate

120‧‧‧second substrate

130‧‧‧Display material layer

140‧‧‧ first light shielding layer

150‧‧‧First film transistor and sensing electrode layer

160‧‧‧Color filter layer

170‧‧‧Protective layer

180‧‧‧Second thin film transistor layer

190‧‧‧First polarizing layer

200‧‧‧Second polarizing layer

141‧‧‧ first shading line

183‧‧‧ pixel crystal

153‧‧‧ Data readout selection component

155‧‧‧Common signal selection component

Claims (15)

A display device with fingerprint identification and touch detection includes: a first substrate; a second substrate; the first substrate and the second substrate are arranged in parallel pairs to sandwich a display layer on the two substrates a first thin film transistor and a sensing electrode layer are disposed on a side of the first substrate facing the display layer, and the first thin film transistor and the sensing electrode layer have a plurality of sensing electrodes for fingerprint sensing and Touch sensing. The display device of the first aspect of the invention, wherein the first thin film transistor and the sensing electrode layer further comprise: a plurality of data readout selection elements, each of which reads The selection element is corresponding to a sensing electrode, and each of the data read selection elements has a first end point, a second end point and a third end point, wherein the first end point is connected to the corresponding sensing electrode; a plurality of common signal selection components, each of the sensing electrodes corresponding to at least one common signal selection component, each common signal selection component having a first end point, a second end point, and a third end point, wherein the first The end point is connected to the corresponding sensing electrode; the plurality of data readout selection traces, each data readout selection trace is connected to the second end point of the at least one corresponding data readout selection component; the plurality of sensing signals a readout line, each sense signal readout line is connected to a third end point of the at least one corresponding data readout selection component; and a plurality of common signal selection traces, each of the total The same signal selection trace is connected to the second end point of the at least one corresponding common signal selection component; The plurality of sensing electrodes are divided into at least one sensing region and at least one non-sensing region by the plurality of data reading selection elements and the plurality of common signal selection elements. The display device of claim 2, wherein each of the data read selection elements is a first thin film transistor, and each of the common signal selection elements is a Second thin film transistor. The display device of the third aspect of the present invention, wherein the first thin film transistor has a gate corresponding to the second end of the data readout selection component, a source/drain of the first thin film transistor corresponds to a first end of the data readout selection element, and another source/drain of the first thin film transistor corresponds to the data readout select element Third endpoint. The display device with fingerprint identification and touch detection according to the fourth aspect of the invention, wherein each of the plurality of sensing electrodes is polygonal, circular, elliptical, rectangular or square. A display device with fingerprint identification and touch detection as described in claim 5, wherein each of the plurality of sensing electrodes is one of the following: a transparent conductive film ITO material, zinc oxide Tin film material, ETO material, nano silver, conductive polymer material, carbon nanotube material, and graphene material. The display device as claimed in claim 2, further comprising: a second thin film transistor layer on a side of the second substrate facing the display layer, the second The thin film transistor layer has K gate driving lines and L source driving lines, and the K gate driving lines and the L source driving lines are respectively disposed in a first direction and a second direction to form a plurality of a pixel block, each pixel block has a corresponding pixel transistor and a pixel capacitor, according to a display pixel signal and a A driving signal is displayed to drive the corresponding pixel transistor and the pixel capacitor to perform a display operation, wherein K and L are positive integers. The display device of the first thin film transistor and the sensing electrode layer is N times larger than the pixel block, and the display device of the first thin film transistor and the sensing electrode layer is N times. N is a positive integer and N is greater than or equal to 1. The display device for fingerprint identification and touch detection according to claim 8 further includes: a first light shielding layer located on the first substrate and the first thin film transistor and the sensing electrode layer The first light-shielding layer is composed of a plurality of first light-shielding lines, and the plurality of first light-shielding lines are respectively disposed in the first direction and the second direction to form a plurality of light-transmissive blocks; The position of the first light-shielding line corresponds to the position of the K gate driving lines and the L source driving lines of the second thin film transistor layer; a color filter layer is disposed on the first thin film transistor and The sensing electrode layer faces one side of the display layer; and a protective layer is located on a side of the color filter layer facing the display layer. The display device for fingerprint identification and touch detection according to claim 9 further includes: a common electrode layer located on a side of the protective layer facing the display layer. The display device as claimed in claim 9 further comprising: a second light shielding layer located on the first thin film transistor and the sensing electrode layer and the color filter layer; The second light shielding layer is composed of a plurality of second light shielding lines. The display device with fingerprint identification and touch detection as described in claim 7 , wherein the plurality of data read selection elements and the positions of the plurality of common signal selection elements correspond to the plurality of pictures Electron crystal. The display device with fingerprint identification and touch detection as described in claim 7 , wherein the plurality of data read selection traces, the plurality of common signal selection traces, and the plurality of sensing signals The position of the readout line corresponds to the position of the K gate drive lines and the L source drive lines. The display device of the second light-shielding layer has a plurality of second light-shielding lines according to the plurality of first light-shielding layers. The position of the first shading line is set. The display device as claimed in claim 1 , wherein the display layer is a liquid crystal layer or an organic light emitting diode layer.