WO2020226007A1

WO2020226007A1 - Display device including fingerprint authentication sensor, and laminate body used in display device

Info

Publication number: WO2020226007A1
Application number: PCT/JP2020/014928
Authority: WO
Inventors: 流竹厚; 静人山越
Original assignee: 住友化学株式会社
Priority date: 2019-05-09
Filing date: 2020-03-31
Publication date: 2020-11-12
Also published as: JPWO2020226007A1; KR20220009972A; TW202105011A; CN113767413A

Abstract

The problem addressed by the present invention is to provide: a display device including a fingerprint authentication sensor in which an increase in the size of the bezel region is suppressed, and it is also possible to contribute to further slimming of the display device; and a laminate body used in the display device.　This display device 1 comprises: a display element provided on a prescribed surface in a display region layer 40 of a laminate body 110, the display element being for displaying an image; a fingerprint authentication sensor provided on the same prescribed surface 40 as the display element, and detecting the image of a fingerprint used for fingerprint authentication, in the position at which display is performed by the display element; and an integrated circuit 200 that is a processing unit for performing a fingerprint authentication process using the image detected by the fingerprint authentication sensor.

Description

Display device including fingerprint authentication sensor and laminate used for it

The present invention relates to a display device including a fingerprint authentication sensor and a laminate used therein.

Confidential information data such as personal information and business secrets are stored in mobile terminals such as notebook computers, tablet terminals and smartphones, and mobile terminals need a security system to protect these data. As a security system, a fingerprint authentication sensor that enhances security by using the fingerprint of a human finger is known. The fingerprint authentication sensor is a sensor that detects the fingerprint of a finger.

The fingerprint authentication sensor is usually arranged outside the screen for displaying the image on the mobile terminal, for example, the home button. As a result, the bezel area outside the screen becomes large, and the screen of the mobile terminal becomes small accordingly.

As a means for arranging the fingerprint authentication sensor in the area on the screen, Patent Document 1 discloses a display device in which the fingerprint authentication sensor is arranged under the display panel.

JP-A-2018-85114

One embodiment of the present invention aims to provide a display device including a fingerprint authentication sensor and a laminate used therein, which can suppress an increase in the size of a bezel region and contribute to further slimming of the display device. And.

In order to achieve the above object, the display device according to the embodiment of the present invention is provided on a predetermined surface and a display element for displaying an image and a display element on the same predetermined surface as the display element. A fingerprint authentication sensor that detects a fingerprint image used for fingerprint authentication and a processing unit that performs fingerprint authentication processing using the image detected by the fingerprint authentication sensor at a position where the display element displays the fingerprint. Be prepared.

In order to achieve the above object, the display device according to the embodiment of the present invention includes a display element for displaying an image and an image of a fingerprint used for fingerprint authentication at a position where the display element performs the display. It is provided with a display area layer having a fingerprint authentication sensor for detecting the fingerprint, and a processing unit for performing fingerprint authentication processing using the image detected by the fingerprint authentication sensor.

In order to achieve the above object, the laminate for the display device according to the embodiment of the present invention is provided on a predetermined surface and has a display element for displaying an image and a predetermined display element which is the same as the display element. It is provided with a fingerprint authentication sensor that detects an image of a fingerprint used for fingerprint authentication at a position provided on a surface and displayed by a display element.

In order to achieve the above object, the laminate for the display device according to the embodiment of the present invention is used for fingerprint authentication at a display element for displaying an image and a position where the display is performed by the display element. A display area layer including a fingerprint authentication sensor for detecting an image of a fingerprint to be obtained is provided.

In one embodiment of the present invention, the fingerprint authentication sensor and the display element for displaying an image are arranged on the same surface or in the display area layer, whereby the increase in the size of the bezel area is suppressed and the display is slim. The device can be given. Further, one embodiment of the present invention is highly convenient because the fingerprint can be detected in the screen for displaying the image.

It is a schematic diagram which shows the 1st Embodiment, 2nd Embodiment and 3rd Embodiment of the display device of this invention. It is a schematic diagram which shows the display area layer in 1st Embodiment of the display device of this invention. It is a schematic diagram which shows the display area layer in 2nd Embodiment of the display device of this invention. It is a schematic diagram which shows the display area layer in 3rd Embodiment of the display device of this invention. It is a schematic diagram which shows 1st Embodiment, 2nd Embodiment, 3rd Embodiment and 4th Embodiment of the display device of this invention. It is a schematic diagram which shows the display area layer in 4th Embodiment of the display device of this invention.

The display device of the present invention can be applied to a self-luminous display device such as an inorganic EL display device and an organic EL display device, and can be applied to, for example, an organic EL display device.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings. In the following embodiment, an example of an organic EL display device will be mainly described as one of the display devices.

FIG. 5 schematically shows the display device 1 of the first embodiment. The display device 1 is a device capable of displaying an image, such as a tablet terminal or a smartphone. In addition, the display device 1 can perform fingerprint authentication of the user. The user's fingerprint authentication may be performed at the same timing and purpose as the conventional device, such as when the user's display device 1 starts to be used.

As shown in FIG. 5, the display device 1 includes a laminate 110 and an integrated circuit 200 as a configuration for displaying an image and performing fingerprint authentication of a user. The portion of the laminated body 110 in FIG. 5 is a cross-sectional view showing the side surfaces of the

layers

10, 20, 30, 40, and 50 constituting the laminated body 110. Further, the display device 1 may have a configuration usually provided in a device such as a tablet terminal or a smartphone.

The laminate 110 is a module that constitutes a display screen for displaying an image and detects a fingerprint of a user's finger. The integrated circuit 200 is a module (device) for performing information processing and the like for fingerprint authentication of a user. As the integrated circuit 200, the same one as that used in the conventional device may be used. The integrated circuit 200 is fixedly arranged, for example, in the housing (not shown) of the display device 1, for example, on the back side of the laminated body 110.

The laminate 110 has a transparent plate 10, a polarizing film 30, a display area layer 40, and a back plate 50. The transparent plate 10 side is a layer facing the outside of the display device 1. The transparent plate 10 and the polarizing film 30 may be adhered to each other by the adhesive layer 20. Each

layer

10, 20, 30, 40, 50 constituting the laminated body 110 has a shape of a display screen for displaying an image when viewed from the stacking direction, and is, for example, a rectangle.

FIG. 2 shows the display area layer 40 in the first embodiment, and is a schematic view seen from above of the laminated body 110 in FIG. The display area layer 40 is provided with a plurality of

display elements

401, 402, 403 and a plurality of fingerprint authentication sensors 404. One

display element

401, 402, 403 corresponds to one pixel constituting the display screen. In the display area layer 40, the fingerprint authentication sensor 404 and the

display elements

401, 402, 403 are present on the same surface. When these are present on the same surface, a slim display device 1 can be obtained. Each fingerprint authentication sensor 404, each

display element

401, 402, 403 and the integrated circuit 200 are electrically connected to each other by wiring. Through the connection, the integrated circuit 200 supplies the fingerprint authentication sensor 404 and the

display elements

401, 402, 403 with electric power for driving them. In addition, information is transmitted and received via the connection.

Even in the absence of the transparent plate 10 and the polarizing film 30, that is, a display device having a display area layer 40 and a back plate 50 can function as a display device including the fingerprint authentication sensor 404, and is slimmed down. A display device can be obtained. From the viewpoint of stability over time and life, the display device 1 may have a transparent plate 10. Further, from the viewpoint of preventing reflection of external light, the display device 1 may have a polarizing film 30.

The fingerprint of the user's finger comes into contact with the transparent plate 10. Since the fingerprint authentication sensor 404 is present in the display area layer 40, the fingerprint can be detected and the fingerprint pattern can be recognized in the display screen displaying the image.

Display elements

401, 402, 403 are elements for displaying images. As the

display elements

401, 402, and 403, for example, an OLED (Organic Light Emitting Diode) can be used. The

display elements

401, 402, and 403 emit light, that is, emit light. The emitted light is directed toward the transparent plate 10 and emitted to the outside of the display device 1, and the user can recognize the emitted light. The

display elements

401, 402, and 403 can emit light, for example, blue, red, or green. The first display element 401, the second display element 402, and the third display element 403 emit light, for example, blue, green, and red, respectively. As shown in FIG. 2, the fingerprint authentication sensor 404 and the

display elements

401, 402, 403 are arranged alternately. Specifically, for example, a plurality of

display elements

401, 402, 403 and a fingerprint authentication sensor 404 are vertically arranged with a slight interval, and the rows thereof are the display element 401, the display element 402, and the display element 403. And the fingerprint authentication sensor 404 are arranged side by side with a slight interval in this order. By arranging these alternately, the uniformity of fingerprint sensing over the entire screen is increased. The

display elements

401, 402, and 403 have, for example, a laminated structure including a cathode, an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, a hole injection layer, and an anode, and are usually driven by an integrated circuit 200. To.

The transparent plate 10 may be a transparent film or transparent glass. When a transparent film is used as the transparent plate 10, a flexible display can be obtained. Since the obtained flexible display is slim, it has excellent flexibility.

The back plate 50 may be a PI (Polyimide) film substrate. A multi-layer buffer film may be formed on the back plate 50 with an insulating material. Further, the back plate 50 may be formed with wiring for supplying a power source or a signal applied to the display area layer 40. The back plate 50 may further have a PET (polyethylene terephthalate) substrate. The back plate 50 can block moisture permeation so that the display area layer 40 is not exposed to humidity, and can support the display area layer 40. Since the back plate 50 has flexibility, the display device 1 of the present invention can be used as a flexible display.

The polarizing film 30 can block the reflection of external light on the display area layer 40 to improve outdoor visibility. The polarizing film 30 may include a circular polarizing element (or a λ / 4 plate). The pressure-sensitive adhesive layer 20 that adheres the polarizing film 30 and the transparent plate 10 may be, for example, an optical adhesive (Optical clear adhesive, OCA).

The

display elements

401, 402, and 403 are arranged in a matrix, and are further electrically connected to a data line and a gate line that intersects the data line, thereby emitting light and giving an input image. The data line is connected to the integrated circuit 200 and receives a data signal from the integrated circuit 200.

The fingerprint authentication sensor 404 is mounted in the display area layer 40. The fingerprint authentication sensor 404 is a sensor used for fingerprint authentication to detect a fingerprint image. The fingerprint authentication sensor 404 detects the fingerprint of the user's finger in contact with or in close proximity to the transparent plate 10. That is, the fingerprint authentication sensor 404 detects the fingerprint at the position where the

display elements

401, 402, and 403 display.

A plurality of fingerprint authentication sensors 404 are arranged substantially evenly and fixedly in the display area layer 40. The individual fingerprint authentication sensor 404 detects the fingerprint of the user's finger corresponding to the placed position. By stitching together the detection results from the plurality of fingerprint authentication sensors 404, an image of the fingerprint of the user's finger is obtained. The position where the fingerprint authentication sensor 404 is arranged may be a part of the display area layer 40 instead of the entire display area layer 40. As the fingerprint authentication sensor 404, for example, an optical fingerprint authentication sensor that optically detects a fingerprint image can be used. The optical fingerprint authentication sensor 404 outputs the detection result to the integrated circuit 200.

The optical fingerprint authentication sensor 404 receives the light reflected from the fingerprint and detects the fingerprint pattern by utilizing the difference in the amount of light reflected from the ridge (Ridge) and the dent (Valley) of the fingerprint. As the light reflected by the fingerprint detected by the optical fingerprint authentication sensor 404, the light emitted by the

display elements

401, 402, 403 can be used. However, light other than the

display elements

401, 402, and 403 may be the detection target of the optical fingerprint authentication sensor 404. In this case, the light source of the light is provided in the display device 1. The light receiving surface of the optical fingerprint authentication sensor 404 faces the transparent plate 10, and detects reflected light. As the optical fingerprint authentication sensor 404, for example, an image sensor using a PD (Photodiode) such as a CCD (Charge Coupled Device) or a CIS (CMOS Image Sensor) can be used.

The fingerprint authentication sensor 404 may be an ultrasonic fingerprint authentication sensor 404 that detects a fingerprint image by ultrasonic waves. In this case, the display device 1 is provided with an ultrasonic transmitter that generates ultrasonic waves and sends the ultrasonic waves toward the transparent plate 10 (may be included in the ultrasonic fingerprint authentication sensor). The ultrasonic fingerprint authentication sensor 404 detects the fingerprint pattern by analyzing the ultrasonic waves reflected by the ridges (Ridge) and dents (Valley) of the fingerprint. The ultrasonic wave receiving surface of the ultrasonic fingerprint authentication sensor 404 faces the fingerprint in contact with the transparent plate 10.

The back plate 50 may have a foam pad (Foam pad) and a metal layer. The foam pad is made of foamed resin and absorbs vibration and shock. The metal layer is a metal that shields electromagnetic waves (electro-magnetic interference, EMI), for example, a Cu layer.

The integrated circuit 200 is a processing unit that performs fingerprint authentication processing using the image detected by the fingerprint authentication sensor 404. The integrated circuit 200 generates a fingerprint image based on the input from each fingerprint authentication sensor 404. The integrated circuit 200 performs fingerprint authentication processing using the generated fingerprint image. The above processing in the integrated circuit 200 can be performed in the same manner as the conventional optical fingerprint authentication. For example, the integrated circuit 200 stores information for performing fingerprint authentication (for example, fingerprint information of a user to be authenticated), and performs fingerprint authentication using the stored information. The result of fingerprint authentication may be used in the same manner as a device having a conventional fingerprint authentication function.

The integrated circuit 200 converts the data of the input video input or generated by the display device 1 into a data signal and outputs the data to the data lines of the

display elements

401, 402, 403 to display the

display elements

401, 402, 403. Drive. The functions described above and described later in the integrated circuit 200 need not be performed in one integrated circuit 200. The display device 1 includes a plurality of integrated circuits 200, and the function may be realized by any of the integrated circuits 200.

The fingerprint detection and fingerprint authentication processing by the fingerprint authentication sensor 404 need not always be performed, and may be performed at a specific timing as described below. For example, the display device 1 may have modes such as a video display mode and a fingerprint authentication mode. For example, the fingerprint authentication sensor 404 may not be driven in the video display mode, and the fingerprint authentication sensor 404 may be driven in the fingerprint authentication mode. That is, the fingerprint authentication sensor 404 may act as the fingerprint authentication sensor only at a predetermined timing. This control is performed by, for example, the integrated circuit 200.

The display device 1 further includes a contact sensor that detects the contact or proximity of the object to the position where the fingerprint is detected by the fingerprint authentication sensor 404 in the display device 1, and the fingerprint authentication sensor 404 is the contact or contact of the object by the contact sensor. The fingerprint image may be detected by using the detection of proximity as a trigger. The display device 1 may include, for example, a touch sensor array (not shown) between the transparent plate 10 and the display area layer 40 as a contact sensor. That is, the display device 1 may have a touch panel function. As the touch sensor array, the same conventional one that detects the contact or proximity of an object by the capacitance can be used. The touch sensor array is, for example, electrically connected to the integrated circuit 200 by wiring and is driven by the integrated circuit 200. The touch sensor array senses the contact or proximity of an object to the surface of the transparent plate 10, that is, the touch input. When the touch sensor array senses the touch input, it notifies the integrated circuit 200 to that effect.

The integrated circuit 200 does not drive the fingerprint authentication sensor 404 (for example, does not supply power for driving) when the touch input is not notified from the touch sensor array, and the integrated circuit 200 does not drive the touch sensor array. When the fact that the touch input is detected is notified, the fingerprint authentication sensor 404 may be driven (for example, power for driving may be supplied). As a result, the fingerprint authentication sensor 404 detects the fingerprint image only when the touch sensor array detects the fingerprint. That is, the fingerprint authentication sensor 404 detects the fingerprint image triggered by the detection of the contact or proximity of the object to the transparent plate 10. Alternatively, the fingerprint authentication sensor 404 may detect the fingerprint image when the button provided on the display device 1 is pressed.

Further, the fingerprint authentication sensor 404 may detect a fingerprint image at regular intervals. That is, the fingerprint authentication sensor 404 may act as a fingerprint authentication sensor in time division. In this case, the time for acting as the fingerprint authentication sensor may be 0.02 seconds or less for each fingerprint detection. By setting this time within this range, fingerprint authentication can be performed at a level that the user cannot see. This time may be further 0.01 seconds or less, or 0.005 seconds or less.

The

display elements

401, 402, and 403 may display for fingerprint detection at the timing when the fingerprint image is detected by the fingerprint authentication sensor 404. In the fingerprint authentication mode driven by the fingerprint authentication sensor 404, the

display elements

401, 402, and 403 emit light for fingerprint detection toward the transparent plate 10, and the reflected light generated by the light reflected by the transparent plate is emitted. It may be detected by the fingerprint authentication sensor 404. At this time, the light emitted by the

display elements

401, 402, 403 may be monochromatic light. Emission of each color can be realized by any of blue, red and green, or a combination of these emission amounts. In particular, light having a wavelength having a high sensitivity of detection by the fingerprint authentication sensor 404 (for example, red) may be emitted to reduce the influence of external light. As a result, the S / N ratio in the detection of the fingerprint authentication sensor 404 can be increased.

As described above, in the present embodiment, the fingerprint authentication sensor 404 and the

display elements

401, 402, 403 for displaying images are arranged on the same surface. Therefore, in the display device 1, it is not necessary to separate the display screen and the area for performing fingerprint authentication. As a result, it is possible to suppress an increase in the size of the bezel region and provide a slim display device 1. Further, the display device 1 according to the present embodiment is highly convenient because it can detect a fingerprint in a display screen for displaying an image. In the present embodiment, since the fingerprint authentication sensor 404 is arranged in the display area layer 40, the distance between the fingerprint in contact with the transparent plate 10 and the fingerprint authentication sensor 404 is short. As a result, the ultrasonic wave or light reception efficiency of the fingerprint authentication sensor 404 is enhanced, and the fingerprint sensing performance is improved.

Further, the laminated body 110 according to the present embodiment can provide a slim display device 1 by suppressing an increase in the size of the bezel region. The laminated body 110 may include

display elements

401, 402, 403 provided on the same surface and a fingerprint authentication sensor 404, and may have a configuration other than the above. Alternatively, the fingerprint authentication sensor 404 and the

display elements

401, 402, 403 may be arranged in the display area layer 40.

Further, as in the present embodiment, the fingerprint authentication sensor 404 and the

display elements

401, 402, 403 may be arranged alternately on a predetermined surface, that is, in the display area layer 40. According to this configuration, the fingerprint image can be detected and the image can be displayed appropriately. However, the fingerprint authentication sensor 404 and the

display elements

401, 402, and 403 do not necessarily have to be arranged alternately, and may be arranged so as to be able to detect the fingerprint image and display the image.

Further, as in the present embodiment, a contact sensor (for example, the touch sensor array described above) for detecting the contact or proximity of the object to the position where the fingerprint is detected in the display device 1 is provided to detect the contact or proximity of the object. The fingerprint authentication sensor 404 may detect the fingerprint image with the result as a trigger. According to this configuration, the fingerprint image can be detected only when necessary, the fingerprint image can be detected efficiently and the image can be displayed, and the power consumption can be reduced.

Further, the fingerprint authentication sensor 404 may detect the fingerprint image at regular intervals as in the present embodiment. According to this configuration, it is possible to efficiently detect the fingerprint image and display the image as described above, and it is possible to reduce the power consumption.

Further, as in the present embodiment, the

display elements

401, 402, and 403 may display for fingerprint detection at the timing when the fingerprint image is detected by the fingerprint authentication sensor 404. According to this configuration, the fingerprint image can be detected appropriately and surely, and as a result, the fingerprint authentication of the user can be performed appropriately and surely. The above is the display device 1 and the laminated body 110 according to the first embodiment.

Subsequently, the display device 1 and the laminated body 110 according to the second embodiment of the present invention will be described. The display device 1 and the laminated body 110 according to the second embodiment are the same as the display device 1 and the laminated body 110 according to the first embodiment, except for the points described below. In the first embodiment, the

display elements

401, 402, 403 and the fingerprint authentication sensor 404 are configured as separate bodies and arranged independently, whereas in the present embodiment, the fingerprint authentication sensor displays. It is integrated with a part of the element. That is, the display element can operate as a fingerprint authentication sensor (or the fingerprint authentication sensor can operate as a display element). The integration of the fingerprint authentication sensor and the display element is performed, for example, by arranging the fingerprint authentication sensor in the display element. Alternatively, the composition constituting the display element and the composition constituting the fingerprint authentication sensor may be the same.

FIG. 3 shows the display area layer 40 in the second embodiment, and is a schematic view seen from above of the laminated body 110 in FIG. The display area layer 40 according to the second embodiment is provided with a plurality of

display elements

4014, 4024, 4034 in which a fingerprint authentication sensor is integrated. Specifically, the display element 401 and the display element 4014 in which the display element 401 and the fingerprint authentication sensor are integrated are alternately arranged vertically with a slight interval. Similarly, the display element 402 and the display element 4024 in which the display element 402 and the fingerprint authentication sensor are integrated are arranged vertically alternately with a slight interval, and the display element 403, the display element 403, and the fingerprint are arranged. The display elements 4034 in which the authentication sensor is integrated are alternately arranged vertically with a slight interval. The rows are arranged side by side in order with a small spacing. In the second embodiment, since the fingerprint authentication sensor is integrated with the display element, the resolution of the image display area is improved as compared with that of the first embodiment. The above is the display device 1 and the laminated body 110 according to the second embodiment.

Subsequently, the display device 1 and the laminated body 110 according to the third embodiment of the present invention will be described. The display device 1 and the laminated body 110 according to the third embodiment are the same as the display device 1 and the laminated body 110 according to the first or second embodiment except for the points described below. FIG. 4 shows the display region layer 40 in the third embodiment, and is a schematic view of the laminated body 110 in FIG. 5 as viewed from above. In the second embodiment, the vertically arranged

display elements

401, 402, 403 of the display area layer 40 and the

display elements

4014, 4024, 4034 in which the fingerprint authentication sensor is integrated have a slight distance from each other. It was lined up. In the present embodiment, the

display elements

401, 402, 403 and the

display elements

401, 4024, 4034 may be arranged in physical contact with each other as shown in FIG. Specifically, for example, the two display elements may be arranged in physical contact with each other so that the

display elements

401, 402, 403 are on the upper side and the

display elements

401, 4024, 4034 are on the lower side. In the third embodiment, the resolution of the video display area is improved as compared with that of the second embodiment. The above is the display device 1 and the laminated body 110 according to the third embodiment.

Subsequently, the display device 1 and the laminated body 110 according to the fourth embodiment of the present invention will be described. Except for the points described below, the display device and the laminated body according to the fourth embodiment are the same as the display device 1 and the laminated body 110 according to the first, second or third embodiment. FIG. 6 shows the display region layer 40 in the fourth embodiment, and is a schematic view of the laminated body 110 in FIG. 5 as viewed from above. In the second and third embodiments, the display area layer 40 is a

display element

401, 402, 403 (in which the fingerprint authentication sensor is not integrated) and a display element 401, 402,403 in which the fingerprint authentication sensor is integrated. 4034 and 4034 were mixed and provided. In the present embodiment, only the

display elements

4014, 4024, 4034 in which the fingerprint authentication sensor is integrated may be arranged in the display area layer 40. Specifically, for example, for example, a plurality of

display elements

401, 4024, 4034 are vertically arranged with a slight interval, and the rows thereof are the display element 4014, the display element 4024, and the display element. They are arranged side by side in the order of 4034 with a slight interval. In the fourth embodiment, since the density of the fingerprint authentication sensor is improved, the fingerprint image can be detected more appropriately. When displaying for fingerprint detection, when only some

display elements

4014, 4024, 4034 (for example,

display elements

4014, 4024, 4034 of a specific color) emit light, display elements 4014, which do not emit light. 4024 and 4034 may detect an image of a fingerprint (the same applies to other than the present embodiment). The above is the display device 1 and the laminated body 110 according to the fourth embodiment.

The display device of the present invention can be applied to a self-luminous display device such as an inorganic EL display device and an organic EL display device, and is preferably applicable to an organic EL display device.

FIG. 1 is a cross-sectional view according to the first embodiment of the display device of the present invention.

With reference to FIG. 1, the display device of the present invention includes a transparent plate 10, a polarizing film 30, a display area layer 40, and a back plate 50. The transparent plate 10 and the polarizing film 30 may be adhered by the pressure-sensitive adhesive layer 20. The display area layer 40 has a display element and a fingerprint authentication sensor.

FIG. 2 shows an embodiment of the display area layer 40 in the first embodiment, and is a schematic view seen from above of the display device according to FIG. The display area layer 40 includes a display element and a fingerprint authentication sensor 404, and the display element is composed of a plurality of display pixels (401, 402, 403). In the display area layer, the fingerprint authentication sensor 404 and the display element are present on the same surface. When these are present on the same surface, a slim display device can be obtained. Even in the absence of the transparent plate 10 and the polarizing film 30, that is, a display device having a display area layer 40 and a back plate 50 can function as a display device including a fingerprint authentication sensor, and a slim display is possible. You can get the device. From the viewpoint of stability over time and life, the display device preferably has a transparent plate 10. Further, from the viewpoint of preventing reflection of external light, it is preferable that the display device has a polarizing film 30.

Fingerprints of fingers come into contact with the transparent plate 10. Since the fingerprint authentication sensor is present in the display area, the fingerprint can be detected and the fingerprint pattern can be recognized in the screen displaying the image.

The display element emits light by emitting light from display pixels (401, 402, 403). The emitted light is directed toward the transparent plate 10 and emitted to the outside of the display device, and the viewer can recognize the emitted light. The display pixels can emit, for example, blue, red or green. The first display pixel 401, the second display pixel 402, and the third display pixel emit light, for example, blue, green, and red, respectively. In FIG. 2, the fingerprint authentication sensor and the display element are arranged alternately. By arranging these alternately, the uniformity of fingerprint sensing over the entire screen is increased. The display element or display pixel has, for example, a laminated structure including a cathode, an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, a hole injection layer, and an anode, and is usually formed by an integrated circuit (not shown). Driven.

The transparent plate 10 may be a transparent film or transparent glass. When a transparent film is used as the transparent plate, a flexible display can be obtained. Since the obtained flexible display is slim, it has excellent flexibility.

The back plate 50 may be a PI (Polyimide) film substrate. A multi-layer buffer film may be formed on the back plate 50 with an insulating material. Further, the back plate 50 may be formed with wiring for supplying a power source or a signal applied to the display area layer 40. The back plate 50 may further have a PET (polyethylene terephthalate) substrate. The back plate 50 can block moisture permeation so that the display area layer 40 is not exposed to humidity, and can support the display area layer 40. Since the back plate 50 has flexibility, the display device of the present invention can be made into a flexible display. Further, the display device of the present invention may include a touch sensor array (not shown) between the transparent plate 10 and the display area layer 40.

The polarizing film 30 can block the reflection of external light on the display area layer 40 to improve outdoor visibility. The polarizing film 40 may include a circular polarizing element (or a λ / 4 plate). The pressure-sensitive adhesive layer 20 that adheres the polarizing film 30 and the transparent plate 10 may be, for example, an optical adhesive (Optical clear adhesive, OCA).

The display element has display pixels arranged in a matrix, and is electrically connected to a data line and a gate line intersecting the data line, whereby each display pixel emits light, and the display element gives an input image. .. The data line is connected to the integrated circuit and receives a data signal from the integrated circuit. The touch sensor array is driven by the touch sensor drive unit, senses the touch input, and transmits the coordinates and identification code (ID) of the touch input to the host system (not shown).

The fingerprint authentication sensor 404 is mounted in the display area layer 40. As the fingerprint authentication sensor 404, the optical fingerprint authentication sensor may be an ultrasonic fingerprint authentication sensor.

The optical fingerprint authentication sensor 404 detects a fingerprint pattern by utilizing the difference in the amount of light reflected from the ridge (Ridge) and the depression (Valley) of the fingerprint that receives the light reflected from the fingerprint. The optical fingerprint authentication sensor can include an image sensor such as a CCD (Charge Coupled Device) or a CIS (CMOS Image Sensor). The display device has modes such as a video display mode and a fingerprint authentication mode. The fingerprint authentication sensor 404 may act as a fingerprint authentication sensor only when it detects a fingerprint. Further, the fingerprint authentication sensor 404 may act as a fingerprint authentication sensor in time division. In this case, the time for acting as the fingerprint authentication sensor is preferably 0.02 seconds or less for each fingerprint detection. By setting the time within this range, fingerprint authentication can be performed at a level that the viewer cannot see. It is more preferably 0.01 seconds or less, and most preferably 0.005 seconds or less. In the fingerprint authentication mode that acts as a fingerprint authentication sensor, the display pixel emits light toward the transparent plate 10 when the fingerprint is detected by the transparent plate, and the reflected light generated by the light being reflected by the transparent plate. Is detected by the fingerprint authentication sensor 404. The light emitted by the detection of the fingerprint may be monochromatic light. Emission of each color can be realized by any of blue, red and green, or a combination of these emission amounts. The light receiving surface of the optical fingerprint authentication sensor 404 faces the transparent plate 10, and detects the reflected light.

The fingerprint authentication sensor 404 may act as a display element. The fingerprint authentication sensor 404 may act as a fingerprint authentication sensor only when it detects a fingerprint, and may act as a display element when it does not detect a fingerprint. By acting as a display element when fingerprints are not detected, the surface emission rate as a display device is improved.

In the fingerprint authentication mode, the ultrasonic fingerprint authentication sensor 404 sends ultrasonic waves toward the transparent plate 10 by using an ultrasonic transmitter, and the ultrasonic waves reflected by the ridges (Ridge) and dents (Valley) of the fingerprint. Analyze to detect fingerprint patterns. The ultrasonic wave receiving surface of the ultrasonic fingerprint authentication sensor 404 faces the fingerprint in contact with the transparent plate 10.

In the present invention, since the fingerprint authentication sensor 404 is arranged in the display area layer 40, the distance between the fingerprint in contact with the transparent plate 10 and the fingerprint authentication sensor 404 is short. As a result, the ultrasonic wave or light reception efficiency of the fingerprint authentication sensor 404 is enhanced, and the fingerprint sensing performance is improved.

The integrated circuit drives the display pixels by converting the input video data into a data signal and outputting it to the data line of the display element. The integrated circuit may be included in the touch sensor drive unit. The integrated circuit is electrically connected to the fingerprint authentication sensor 404.

The fingerprint authentication sensor 404 is electrically connected to the main board and / or integrated circuit of the host system by wiring. The host system is electrically connected to the fingerprint sensor 404, exchanges data with the fingerprint sensor 404, and controls the fingerprint sensor 404. In the fingerprint authentication mode, the host system transmits the fingerprint data of the input video to the integrated circuit. The host system executes an application connected to the coordinates from the touch sensor drive unit, and executes user authentication based on the fingerprint information received from the fingerprint authentication sensor 404. When a fingerprint is detected, the display device can acquire correction data which is background data in advance, and the detection data (fingerprint information) obtained when the fingerprint is detected thereafter uses the correction data. A sequence for correction can be provided. As a result, it is possible to correct the deviation of the detected data when an opaque or translucent foreign matter adheres to the surface of the transparent plate 10.

A second embodiment of the display device of the present invention is also shown in FIG. FIG. 3 shows an embodiment of the display area layer 40 in the second embodiment, and is a schematic view of the display device according to FIG. 1 as viewed from above. The difference between the first embodiment and the second embodiment is that in the first embodiment, the display pixels (401, 402, 403) of the display area layer 40 and the fingerprint authentication sensor 404 are arranged independently. On the other hand, in the second embodiment, the fingerprint authentication sensor is integrated with a part of the display pixels to form display pixels (4014, 4024, 4034) in which the fingerprint authentication sensor is integrated. Other configurations in the second embodiment are the same as those in the first embodiment. In the second embodiment, since the fingerprint authentication sensor is integrated with the display pixels, the image display area is expanded as compared with that of the first embodiment. The fingerprint authentication sensor may be integrated with all of the display pixels.

A third embodiment of the display device of the present invention is also shown in FIG. FIG. 4 shows an embodiment of the display area layer 40 in the third embodiment, and is a schematic view of the display device according to FIG. 1 as viewed from above. The difference between the second embodiment and the third embodiment is that in the second embodiment, the display pixels (401, 402, 403) of the display area layer 40 and the display pixels (4014, 4024) in which the fingerprint authentication sensor is integrated are integrated. , 4034) are arranged independently, whereas in the third embodiment, the display pixels (401, 402, 403) of the display area layer 40 and the display pixel (4014) in which the fingerprint authentication sensor is integrated are integrated. , 4024, 4034) and are arranged in physical contact with each other. Other configurations in the third embodiment are the same as those in the second embodiment. In the third embodiment, the video display area is further expanded as compared with that of the second embodiment.

The laminate of the present invention has a display area layer and a back plate, and the display area layer has a fingerprint authentication sensor and a display element for displaying an image. The laminate of the present invention can be extremely suitably used for the above-mentioned display device.

In the laminated body of the present invention, the display element is composed of a plurality of display pixels, and the fingerprint authentication sensor may be integrated with a part of the display pixels. The laminate of the present invention may have a transparent plate on the opposite side of the back plate in the display area layer. The laminate of the present invention may have a polarizing film between the display region layer and the transparent plate, or may have an adhesive layer between the transparent plate and the polarizing film.

The display device of the present invention has a fingerprint authentication sensor and a display element for displaying an image, and the fingerprint authentication sensor and the display element are present on the same surface.

The display device of the present invention has a transparent plate, a polarizing film, a display area layer, and a back plate in this order, and the display area layer has a fingerprint authentication sensor and a display element for displaying an image.

The laminate of the present invention has a display area layer and a back plate, and the display area layer has a fingerprint authentication sensor and a display element for displaying an image.

In the display device of the present invention, the fingerprint authentication sensor and the display element for displaying an image are arranged on the same surface, thereby suppressing an increase in the size of the bezel region and providing a slim display device. it can. Further, the display device of the present invention is highly convenient because it can detect a fingerprint in the screen for displaying an image. Further, the laminate of the present invention can provide a slim display device by suppressing an increase in the size of the bezel region.

A display device having a fingerprint authentication sensor and a display element for displaying an image, and the fingerprint authentication sensor and the display element are present on the same surface.

The display device in which the fingerprint authentication sensor and the display element are alternately arranged.

The display element is composed of a plurality of display pixels, and the fingerprint authentication sensor is integrated with a part of the display pixels.

The fingerprint authentication sensor is the above-mentioned display device that acts as a fingerprint authentication sensor only when it detects a fingerprint.

The fingerprint authentication sensor is the above-mentioned display device that acts as a fingerprint authentication sensor in time division.

The above-mentioned display device in which the fingerprint authentication sensor acts as a fingerprint authentication sensor for 0.02 seconds or less each time it detects a fingerprint.

The fingerprint authentication sensor is the above-mentioned display device that can act as a display element.

The above-mentioned display device that the fingerprint authentication sensor acts as a fingerprint authentication sensor only when it detects a fingerprint, and acts as a display element when it does not detect a fingerprint.

The above-mentioned display device which further has a transparent plate and the display element emits light toward the transparent plate.

The display pixel is the above-mentioned display device that emits light when a fingerprint is detected, and the fingerprint authentication sensor detects the reflected light generated by the light reflected by the transparent plate.

A display device having a display area layer and a back plate, the display area layer having a fingerprint authentication sensor and a display element for displaying an image.

The above display device having a transparent plate on the opposite side of the back plate in the display area layer.

The above-mentioned display device having a polarizing film between the display area layer and the transparent plate.

The above display device having an adhesive layer between the transparent plate and the polarizing film.

The above-mentioned display device capable of acquiring correction data in advance when a fingerprint is detected, and then using the detection data obtained when the fingerprint is detected and the correction data to make corrections.

The above display device, which is an organic EL display device.

A laminate having a display area layer and a back plate, wherein the display area layer has a fingerprint authentication sensor and a display element for displaying an image.

The above laminate having a transparent plate on the opposite side of the back plate.

The above-mentioned laminate having a polarizing film between the display area layer and the transparent plate.

The above laminate having an adhesive layer between the transparent plate and the polarizing film.

The present invention can be used in a display device including a fingerprint authentication sensor capable of detecting a fingerprint on a screen.

1 Display device 10 Transparent plate 20 Adhesive layer 30 Polarizing film 40 Display area layer 50 Back plate 100 Display device 110 Laminated body 401 First display element 402 Second display element 403 Third display element 404 Fingerprint authentication sensor 4014 Fingerprint First display element with integrated authentication sensor 4024 Second display element with integrated fingerprint authentication sensor 4034 Third display element with integrated fingerprint authentication sensor

Claims

A display element provided on a predetermined surface and for displaying an image,
A fingerprint authentication sensor that detects an image of a fingerprint used for fingerprint authentication at a position that is provided on the same predetermined surface as the display element and that is displayed by the display element.
A processing unit that performs fingerprint authentication processing using the image detected by the fingerprint authentication sensor, and
A display device comprising.
A display area layer having a display element for displaying an image and a fingerprint authentication sensor for detecting a fingerprint image used for fingerprint authentication at a position where the display element performs the display.
A processing unit that performs fingerprint authentication processing using the image detected by the fingerprint authentication sensor, and
A display device comprising.
The display device according to claim 1 or 2, wherein the fingerprint authentication sensor is integrated with the display element.
The display device according to claim 1 or 2, wherein the fingerprint authentication sensor and the display element are arranged alternately.
A contact sensor for detecting the contact or proximity of an object to a position where the fingerprint is detected in the display device is further provided.
The display device according to any one of claims 1 to 4, wherein the fingerprint authentication sensor detects an image of the fingerprint triggered by detection of contact or proximity of the object by the contact sensor.
The display device according to any one of claims 1 to 5, wherein the fingerprint authentication sensor detects an image of the fingerprint at regular time intervals.
The display device according to claim 5 or 6, wherein the display element displays for fingerprint detection at a timing when the fingerprint image is detected by the fingerprint authentication sensor.
A display element provided on a predetermined surface and for displaying an image,
A fingerprint authentication sensor that detects an image of a fingerprint used for fingerprint authentication at a position that is provided on the same predetermined surface as the display element and that is displayed by the display element.
A laminate for a display device.
A laminate for a display device including a display area layer having a display element for displaying an image and a fingerprint authentication sensor for detecting a fingerprint image used for fingerprint authentication at a position where the display element performs display.