CN210119786U - Display device and electronic apparatus - Google Patents

Abstract

The application discloses a display device and electronic equipment. The display device includes: the device comprises a display unit, a transmitter, a beam expander, an ultra-wide-angle lens and an image sensor; the emitter and the beam expander are arranged on one side of the display unit, which is far away from the display side, and the beam expander is arranged between the emitter and the display unit; the transmitter is used for transmitting sensing light rays towards the display unit, and the beam expander is used for diffusing the sensing light rays through the beam expander and projecting the sensing light rays to the outside of the display side of the display unit; the ultra-wide-angle lens and the image sensor are arranged on the periphery of the display unit and are arranged corresponding to the image sensor; the ultra-wide-angle lens is used for acquiring sensing light reflected by a finger of a user and transmitting the sensing light to the image sensor, and the image sensor is used for generating a fingerprint pattern according to the sensing light. Through cooperation of the emitter, the beam expander, the ultra-wide-angle lens and the image sensor, more convenient fingerprint identification experience can be provided.

Description

Display device and electronic apparatus

Technical Field

The application relates to the technical field of fingerprint identification, in particular to a display device and electronic equipment.

Background

In the field of biometric identification, fingerprint identification is one of the most widely used biometric identification methods.

Generally, fingerprint identification technology includes capacitive fingerprint identification, ultrasonic fingerprint identification, optical fingerprint identification, and the like. However, in these fingerprint identification methods, the user needs to press the finger to a specific small area, and the fingerprint of the user finger is identified in the area, so as to achieve the functions of fingerprint identification, etc., and the actual experience effect is not as ideal. Alternatively, even some related schemes for increasing the fingerprint identification area require a corresponding increase in the area of the fingerprint sensing chip, which necessarily increases the cost significantly.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a display device and an electronic apparatus, so as to solve the problem that the area of the existing fingerprint identification is small.

In order to solve the technical problem, the application provides a display device with a fingerprint identification function. The display device includes: the device comprises a display unit, a transmitter, a beam expander, an ultra-wide-angle lens and an image sensor; the emitter and the beam expander are arranged on one side of the display unit, which is far away from the display side, and the beam expander is arranged between the emitter and the display unit; the transmitter is used for transmitting sensing light rays towards the display unit, and the beam expander is used for diffusing the sensing light rays through the beam expander and projecting the sensing light rays out of the display side of the display unit; the ultra-wide-angle lens and the image sensor are both arranged on the periphery of the display unit and are arranged corresponding to the image sensor; the ultra-wide-angle lens is used for acquiring sensing light reflected by a finger of a user and transmitting the sensing light to the image sensor, and the image sensor is used for generating a fingerprint pattern according to the sensing light.

In one embodiment, the emitter is a structural light emitter, the structural light emitter is used for emitting sensing light with a code pattern, and the sensing light of the code pattern is diffused by the beam expander and projected to the outside of the display side of the display unit; or the emitter is a speckle emitter, and the speckle emitter is used for emitting sensing light with a speckle pattern, and the sensing light with the speckle pattern is diffused by the beam expander and projected to the outside of the display side of the display unit.

In one embodiment, the display unit further includes a display layer, a touch layer and a protection layer, which are stacked, wherein the protection layer is located at the outer side of the display device; the sensing light emitted by the emitter penetrates through the display layer and the touch layer to be diffused to the protective layer, and is projected to the outside of the display side through the protective layer.

In one embodiment, the surface of the super-wide-angle lens comprises a convex curved surface and a plane facing the image sensor; the sensing light is incident and deflected from the convex curved surface and is emitted to the image sensor from the plane.

In one embodiment, the protective layer covers the super-wide-angle lens; or the ultra-wide angle lens is positioned on the peripheral side of the protective layer.

In one embodiment, the display unit includes a first region and a second region, and the emitter and the beam expander are disposed in both the first region and the second region; sensing light rays emitted by the emitters are diffused to corresponding areas through the corresponding beam expanders.

In one embodiment, each of the regions has one emitter and one beam expander, and the emitter and the beam expander are located at the center of the corresponding region.

In one embodiment, the number of the emitters and the number of the beam expanders are three or more than three correspondingly; three or more than three emitters and beam expanders are arranged at intervals and face the outside of the display side of the display unit.

In one embodiment, the number of the ultra-wide-angle lenses and the number of the image sensors are two or more corresponding, and the two or more ultra-wide-angle lenses and the image sensors are arranged on the periphery of the display unit at intervals.

In one embodiment, the display unit is a liquid crystal display unit, and the liquid crystal display unit comprises a display layer, a polarizing layer and a protective layer which are stacked; the sensing light emitted by the emitter sequentially penetrates through the display layer and the polarizing layer to be emitted to the protective layer.

The application also provides an electronic device, which comprises the display device and a processor, wherein the processor is used for carrying out fingerprint identification according to the fingerprint pattern generated by the image sensor.

This application passes through cooperation of transmitter, beam expanding lens, super wide angle camera lens and image sensor, can provide the function of fingerprint identification under the screen to an area that is used for fingerprint identification can include most region of display element at least. Therefore, the display device does not need to be limited to a specific small-range fingerprint identification area, and more convenient fingerprint identification experience can be provided.

The sensing light with the speckle pattern is emitted through the emitter, and then three-dimensional fingerprint information of the finger of the user is obtained, so that the fingerprint identification accuracy is improved.

The receiving range of the image sensor is improved through the ultra-wide angle lens, and the integration level of the display device is further improved.

Drawings

Fig. 1 is a partial schematic view of a display device according to an embodiment of the present application.

Fig. 2 is a schematic diagram of the display device of fig. 1 for sensing light emergence.

Fig. 3 is a partial schematic view of a display device according to another embodiment of the present application.

FIG. 4 is a schematic view of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1, an embodiment of the present application provides a display device 100, where the display device 100 is capable of providing an off-screen fingerprint recognition function, and an area for fingerprint recognition includes a large area of a display surface of a display unit 110; alternatively, the entire display surface of the display unit 110 may implement fingerprint recognition. Thus, the display device 100 can provide a more convenient fingerprint identification experience. Furthermore, three-dimensional fingerprint information of the finger of the user can be acquired through sensing light with the speckle patterns or the coding patterns, so that the fingerprint identification accuracy is improved.

As shown in fig. 1 to 2, the display device 100 includes: a display unit 110, an emitter 120, a beam expander 130, an ultra-wide angle lens 141, and an image sensor 142. The emitter 120 is used to emit sensing light having a speckle pattern or an encoding pattern. The sensing light of the speckle pattern or the code pattern is diffused to the outside of the display side of the display unit 110 through the beam expander 130, and then the sensing light is blocked and reflected by the finger of the user to form a reflection light carrying fingerprint information; the reflected light carrying the fingerprint information is projected to the edge of the display unit 110, and then captured by the ultra-wide angle lens 141 and the image sensor 142 to form a fingerprint pattern.

The display unit 110 is used for displaying a corresponding image corresponding to an input instruction of the processor, wherein one side of the displayed image is a display side or a touch side, and one side of the displayed image is a display surface or a touch surface. It should be understood that the display unit 110 may include a plurality of hierarchical structures; for example, when the display unit 110 is a liquid crystal display unit 110, structures such as a polarizing layer 113 and a display layer 111 may be included.

The transmitter 120 is disposed at a side of the display unit 110 away from the display side, based on the structure of the display unit 110; in this way, the emitter 120 can emit the sensing light having the speckle pattern or the code pattern toward the display side, and the sensing light can be emitted to the outside of the display side of the display unit 110, so as to contact the finger of the user to acquire the fingerprint information of the finger of the user.

Further, in order to allow the sensing light emitted from the emitter 120 to cover a wider area of the display unit 110, the beam expander 130 is disposed between the emitter 120 and the display unit 110. It should be understood that the sensing light is emitted from the emitting end of the emitter 120, and the beam expander 130 is disposed opposite to the emitting end of the emitter 120. The beam expander 130 is used for diffusing the sensing light through the beam expander 130 and projecting the sensing light out of the display side of the display device 100.

The sensing light rays are emitted through the beam expander 130, so that the emitted sensing light rays can cover most of the display surface of the display unit 110, or the emitted sensing light rays can completely cover the display surface of the display unit 110. Specifically, the exit angle of the sensing light passing through the beam expander 130 may be close to 180 °, so that the exiting sensing light completely covers the display unit 110.

Specifically, the emitter 120 is a structured light emitter, and the structured light emitter is configured to emit sensing light having a code pattern, and then the sensing light of the code pattern is diffused by the beam expander 130 and projected to the outside of the display side of the display unit 110.

In another case, the transmitter 120 is a speckle transmitter, which is used to transmit sensing light with a speckle pattern, and the sensing light with the speckle pattern is diffused by the beam expander 130 and projected to the outside of the display side of the display unit 110.

In some specific application scenarios, when the user's finger touches the display unit 110 (for example, a corner area or a center area of the display side of the display unit 110), the sensing light emitted through the beam expander 130 is blocked by the user's finger, and thus the blocked sensing light accordingly obtains the fingerprint information of the user's finger. Thus, the fingerprint unlocking of the display device 100 need not be limited to a certain small portion of the fixed area, but may include most/all of the area of the display surface of the display unit 110.

When the sensing light is blocked by the finger of the user, fingerprint information of the finger of the user is obtained and reflected, and then reflected light is formed; due to the special feature of the finger structure, the refraction normal is diffuse refraction, and the reflected light is partially refracted toward the edge of the display unit 110. Based on this, in order to obtain the reflected light, the super wide-angle lens 141 and the image sensor 142 are disposed on the peripheral side of the display unit 110, and the super wide-angle lens 141 and the image sensor 142 are disposed in correspondence.

Specifically, the ultra-wide angle lens 141 is used for acquiring sensing light reflected by a finger of a user and transmitting the sensing light to the image sensor 142, and the image sensor 142 can generate a fingerprint pattern according to the sensing light of a corresponding type (e.g., a speckle pattern or a code pattern). Thus, the image sensor 142 is connected to a processor, which can perform fingerprint recognition based on the fingerprint pattern in the image sensor 142.

When the extracted fingerprint information matches the stored fingerprint information, that is, next operation can be performed, such as unlocking the display apparatus 100 (or the electronic device including the display apparatus 100), or determining a function in the display apparatus 100 (or the electronic device including the display apparatus 100) (for example, determining payment for goods or determining data transmission), etc., in this embodiment, some cases are shown only by way of reference, basically, various operations of the display apparatus 100 (or the electronic device including the display apparatus 100) can be determined more once in the above-shown manner, and the display apparatus 100 (or the electronic device including the display apparatus 100) can be prevented from being used by other people, so as to improve the safety of use.

It should be understood that the number of the ultra-wide angle lens 141 and the image sensor 142 may be plural and disposed at intervals on the circumferential side of the display unit 110 to improve the receiving rate of the sensing light.

Further, the reflected light is a reflected light spot formed on the user finger by the sensing light when the sensing light is blocked by the user finger. Wherein, an ultra-wide angle lens 141 and an image sensor 142 may form a set of receiving modules 140. When the ultra-wide angle lens 141 captures the sensing light, the sensing light forms a reflection spot on the user's finger, and the reflection spot is transmitted to the image sensor 142. The image sensor 142 generates a fingerprint pattern from the reflected light spots. The processor can then perform fingerprint recognition based on the fingerprint pattern.

The display unit 110 includes a display layer 111, a touch layer (not shown), and a protective layer 112. The protective layer 112 is provided on the display layer 111 and protects the display layer 111, and the protective layer 112 is a hierarchical structure that is located outside the display device 100 and that can be directly touched and pressed by a user. The protection layer 112 is generally a transparent protection layer 112, such as a transparent glass cover or a plastic cover. The touch layer is used to provide a touch function for the display device 100 (or an electronic device including the display device 100) to improve a usage experience.

As described above, the sensing light emitted from the emitter 120 passes through the display layer 111 and the touch layer via the beam expander 130, and then the sensing light exits and spreads to most/all areas of the protection layer 112, and is projected to the outside of the display side of the display unit 110 via the protection layer 112.

In the display device 100 shown in fig. 2, in order to improve the effect of the image sensor 142 on receiving the reflected light, the ultra-wide-angle lens 141 is provided on the peripheral side of the display layer 111 and is arranged in order with the image sensor 142 in the direction from the protective layer 112 to the display layer 111. The number of the ultra-wide angle lenses 141 is the same as the number of the image sensors 142. Wherein, the ultra-wide angle lens 141 is arranged on the periphery of the protective layer 112; and the protective layer 112 covers and protects the ultra-wide angle lens 141.

As shown in fig. 2, since the ultra-wide angle lens 141 has a large imaging range, when the finger 150 of the user presses the protection layer 112, some of the sensing light is refracted toward the display layer 111. Most of the sensing light is deflected within the protective layer 112.

Based on this, the image sensor 142 can receive the sensing light through the ultra-wide angle lens 141 in a wide range, and extract fingerprint information of the user in the sensing light through an algorithm. Thereby reducing the number of the receiving modules 140 and improving the integration of the display device 100.

In other cases, as in the display device 100 shown in fig. 3, the ultra-wide angle lens 141 is not covered by the protective layer 112, but is located on the peripheral side of the protective layer 112. It should be understood that the ultra-wide angle lens 141 may be protected by other components of the display device 100.

Further, the surface of the ultra-wide angle lens 141 includes a convex curved surface and a plane facing the image sensor 142, and the convex curved surface is convex relative to the plane. The sensing light is incident from the convex curved surface and deflected, and then is emitted to the image sensor 142 through the plane. Since the convex curved surface has a larger photosensitive range, the ultra-wide angle lens 141 can obtain a larger range of sensing light, so as to enhance the receiving of the sensing light by the image sensor 142, thereby improving the accuracy of the display device 100 in identifying the fingerprint of the user.

It should be understood that one suitable type of the ultra-wide angle lens 141 is a fisheye lens. Since the imaging range of the fisheye lens is about 180 ° (generally greater than 180 °), reflected light can be received in a larger range through the fisheye lens, and the distortion of the fisheye lens is eliminated through an algorithm, so that a fingerprint pattern is formed through the image sensor 142. Thereby further improving the accuracy of fingerprint identification.

Wherein, the number of the ultra-wide angle lens 141 and the image sensor 142 is correspondingly multiple; normally, the number of the ultra-wide angle lenses 141 and the number of the image sensors 142 are the same, and a plurality of groups of the receiving modules 140 are formed. The plurality of receiving modules 140 are disposed at intervals around the display unit 110. When the sensing light emitted to the outside of the display side of the display unit 110 forms the reflection light carrying the fingerprint information of the user due to the blocking effect of the finger of the user and is refracted to the periphery, the sensing light is received by the plurality of groups of receiving modules 140 located on the periphery of the display unit 110, so that a fingerprint pattern can be formed, the fingerprint information of the finger of the user is obtained, and functions such as unlocking or determining are realized.

In one class of embodiments, the display unit 110 is divided into two opposing regions. For example: the display device shown in fig. 1 to 3 has a display unit divided into a first area 201 and a second area 202 opposite to each other.

Further, in a general mobile phone, a display screen of the mobile phone may be divided into an upper region and a lower region, or divided into a left region and a right region. The two regions may be the same area or may be approximately the same area (e.g., in a bang screen or drip screen or dug screen it may be difficult to make the two regions the same area). In addition, according to the specifications of the emitter 120 and the beam expander 130 or the usage habits of the user, the areas of the two areas may be different, for example, the lower area of a general mobile phone may be used at a higher frequency, and the lower area may be set to be smaller than the upper area, so that the accuracy of fingerprint identification of the lower area is high, the speed of fingerprint identification is faster, and the like, so as to improve the experience effect of the user.

Each zone is provided with an emitter 120 and a beam expander 130; wherein, one emitter 120 and one beam expander 130 are a set of emission modules. The sensing light emitted from the emitter 120 is diffused to all positions of the corresponding area by the corresponding beam expander 130. Different transmission modules are used for different areas, so that different division of labor exists in fingerprint identification of different areas, the difficulty of the display device 100 for fingerprint identification can be correspondingly reduced, and the speed of fingerprint identification is increased.

Further, in each region, the number of the emitter 120 and the beam expander 130 is one, and the emitter 120 and the beam expander 130 are located at the center of the corresponding region. It should be understood that each area is identified by a set of emission modules, that is, the display device 100 as a whole emits sensing light to the corresponding area by two sets of emission modules. The transmitting modules are all positioned at the center of the corresponding area, the center is the relative geometric center of the corresponding area, and the geometric center is the absolute geometric center; as long as the central position satisfies that the sensing light emitted by the emission module can cover the corresponding area. Based on this, realize the full-screen fingerprint identification of display device 100 through two sets of emission modules.

In another embodiment, the number of the emission modules is three or more, and the emission modules are spaced apart from each other and face the display unit 110. Wherein the interval setting includes, but is not limited to, a same row interval setting or a same column interval setting. It should be understood that the sensing light emitted by each emitting module only needs to cover a small area, so as to realize full-screen fingerprint identification of the display device 100, and have a better fingerprint identification accuracy. Wherein the smaller area is relative to the two areas (e.g., the first area 201 and the second area 202) of the above-described embodiment.

In some specific application scenarios, the screen size ratio in the display device 100 is 16: 9. When the number of the emission modules is two, the size ratio of each area can be 8:9 or 16: 4.5; when the number of the emitting modules is three, the size ratios of the three regions may be 5:9, 5:9 and 6:9, or the areas of the three regions may be set according to the specifications of the emitter 120 and the beam expander 130 or the usage habit of the user. The case of three or more sets of transmitter modules is similar to the case of the three sets of transmitter modules shown above.

As with the above embodiments, the display unit 110 includes, but is not limited to, a liquid crystal display unit. In each of the embodiments shown in fig. 1 to 3, the liquid crystal display unit includes a display layer 111, a protective layer 112, a polarizing layer 113, and a backlight layer not shown in the drawings. The display layer 111, the polarizing layer 113, and the protective layer 112 are stacked, i.e., the polarizing layer 113 is sandwiched between the display layer 111 and the protective layer 112. Because the display layer 111 of the liquid crystal module has high light transmittance, the sensing light sequentially penetrates through the display layer 111 and the polarizing layer 113 and is emitted to the protective layer 112, the influence of the process on the sensing light is small, and the acquisition of the fingerprint information of the finger of the user by the sensing light is not influenced.

It should be understood that a backlight layer (not shown in the figures) is used to provide a backlight, which cooperates with the display layer 111 to present the image picture. Specifically, the emitter 120 and the beam expander 130 are both disposed between the display layer 111 and the backlight layer.

Referring to fig. 4, the present application further provides an electronic device 1000, where the electronic device 1000 includes the display apparatus 100 and the processor 300 in the above embodiments. The processor 300 can be used for fingerprint recognition from the fingerprint pattern generated by the image sensor 142. Furthermore, the whole screen of the electronic equipment can acquire the fingerprint information of the user without being limited to a small fixed area, so that the fingerprint identification range is enlarged, and the use experience of the user is improved.

Further, the electronic device includes, but is not limited to, a mobile phone, or a tablet computer, or other types of touch-enabled terminals.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and it is intended that such changes and modifications be covered by the scope of the application.

Claims (11)

1. A display device having a fingerprint recognition function, comprising: the device comprises a display unit, a transmitter, a beam expander, an ultra-wide-angle lens and an image sensor;

the emitter and the beam expander are arranged on one side of the display unit, which is far away from the display side, and the beam expander is arranged between the emitter and the display unit; the transmitter is used for transmitting sensing light rays towards the display unit, and the beam expander is used for diffusing the sensing light rays through the beam expander and projecting the sensing light rays out of the display side of the display unit;

the ultra-wide-angle lens and the image sensor are both arranged on the periphery of the display unit and are arranged corresponding to the image sensor; the ultra-wide-angle lens is used for acquiring sensing light reflected by a finger of a user and transmitting the sensing light to the image sensor, and the image sensor is used for generating a fingerprint pattern according to the sensing light.

2. The display device according to claim 1, wherein the emitter is a structured light emitter for emitting sensing light having a code pattern, the sensing light of the code pattern being diffused by the beam expander and projected outside a display side of the display unit; or the emitter is a speckle emitter, and the speckle emitter is used for emitting sensing light with a speckle pattern, and the sensing light with the speckle pattern is diffused by the beam expander and projected to the outside of the display side of the display unit.

3. The display device according to claim 2, wherein the display unit further includes a display layer, a touch layer, and a protective layer which are stacked, the protective layer being located outside the display device;

the sensing light emitted by the emitter penetrates through the display layer and the touch layer to be diffused to the protective layer, and is projected to the outside of the display side through the protective layer.

4. The display device of claim 3, wherein a surface of the super-wide mirror includes a convex curved surface and a flat surface facing the image sensor; the sensing light is incident and deflected from the convex curved surface and is emitted to the image sensor from the plane.

5. The display device of claim 3, wherein the protective layer covers the super-wide-angle mirror; or the ultra-wide angle lens is positioned on the peripheral side of the protective layer.

6. The display device according to any one of claims 1 to 5, wherein the display unit includes a first area and a second area, each of the first area and the second area being provided with the emitter and the beam expander; sensing light rays emitted by the emitters are diffused to corresponding areas through the corresponding beam expanders.

7. The display device according to claim 6, wherein the number of the emitters and the beam expander is one in each of the regions, and the emitters and the beam expander are located at the center of the corresponding region.

8. The display device of claim 7, wherein the number of emitters and beam expanders is three or more, respectively; three or more than three emitters and beam expanders are arranged at intervals and face the outside of the display side of the display unit.

9. The display device according to claim 1, wherein the number of the ultra-wide angle lenses and the number of the image sensors are two or more corresponding to each other, and the two or more ultra-wide angle lenses and the image sensors are disposed at intervals on a peripheral side of the display unit.

10. The display device according to claim 1, wherein the display unit is a liquid crystal display unit including a display layer, a polarizing layer, and a protective layer which are stacked; the sensing light emitted by the emitter sequentially penetrates through the display layer and the polarizing layer to be emitted to the protective layer.

11. An electronic device comprising the display device of any one of claims 1 to 10 and a processor configured to perform fingerprint recognition based on a fingerprint pattern generated by the image sensor.

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