Display screen, under-screen optical fingerprint module and electronic equipment

Abstract

The embodiment of the utility model provides a display screen, an under-screen optical fingerprint module and electronic equipment, the display screen comprises a cover plate, a display layer and at least one infrared lamp, the first surface of the cover plate is used for providing a pressing surface, the second surface of the cover plate is opposite to the first surface of the display layer, and the infrared lamp is arranged on the display layer. The second surface of the display layer is opposite to the under-screen optical fingerprint module, the display layer can display an image, and the at least one infrared lamp can emit an infrared signal to the cover plate, so that the infrared signal is totally reflected and transmitted in the cover plate when the pressing surface is not pressed; when the pressing surface is pressed by a finger, a part of the infrared signal is emitted out of the cover plate and then is reflected by the finger to form an infrared reflection signal, and the under-screen optical fingerprint module can perform fingerprint identification based on the infrared reflection signal emitted into the under-screen optical fingerprint module through the cover plate. According to the display screen provided by the embodiment of the invention, an under-screen fingerprint identification function can be realized while a circularly polarized light display screen or a POLLESS display screen is adopted.

Description

Technical Field

[0001] This application relates to the field of optical technology, and more particularly to a display screen, an under-display optical fingerprint module, and an electronic device. Background Technology

[0002] Existing display screens include circularly polarized light display screens and POLLESS display screens that remove the polarizer. For circularly polarized light display screens, since light has polarization properties, commonly used light sources can be divided into circularly polarized light and linearly polarized light. Circularly polarized light is closer to natural light, therefore causing less visual fatigue compared to display screens using linearly polarized light. For POLLESS display screens, since no polarizer is present, the screen brightness is not affected by the polarizer, resulting in higher brightness and a reduction in screen thickness.

[0003] Currently, electronic devices use circularly polarized light display screens for eye protection, or POLLESS display screens to increase screen brightness and reduce screen thickness.

[0004] However, the quarter-glass plate placed between the screen cover and the polarizer in the circularly polarized light display screen changes the direction of light reflected from the object to be identified during fingerprint recognition, preventing the reflected light from passing through the polarizer. Since the POLLESS display screen has a light-shielding layer, the light reflected from the object to be identified during fingerprint recognition cannot penetrate the light-shielding layer. Therefore, circularly polarized light display screens and POLLESS display screens cannot perform under-display optical fingerprint recognition. Utility Model Content

[0005] In view of this, embodiments of this application provide a display screen, an under-display optical fingerprint module, and an electronic device to at least partially solve the above-mentioned problems.

[0006] According to a first aspect of the present application, a display screen is provided, the display screen comprising: a cover plate, a display layer, and at least one infrared lamp; a first surface of the cover plate is used to provide a pressing surface, a second surface of the cover plate is opposite to the first surface of the display layer, and the second surface of the display layer is opposite to an under-display optical fingerprint module; the display layer is configured to display an image; the at least one infrared lamp is configured to emit an infrared signal toward the cover plate, such that the infrared signal is transmitted by total internal reflection within the cover plate when the pressing surface is not pressed, and when the pressing surface is pressed by a finger, a portion of the infrared signal is emitted out of the cover plate and reflected by the finger to form an infrared reflection signal; the under-display optical fingerprint module is used to perform fingerprint recognition based on the infrared reflection signal emitted into the under-display optical fingerprint module through the cover plate.

[0007] In one possible implementation, the display screen includes a plurality of infrared lamps. When the pressing surface is not pressed, the infrared signals emitted by the plurality of infrared lamps are transmitted within the cover plate along at least two transmission directions, and the infrared signals emitted by the plurality of infrared lamps pass through the pressing area on the cover plate. In a direction perpendicular to the pressing surface, the pressing area is opposite to the under-display optical fingerprint module.

[0008] In one possible implementation, a plurality of the infrared lamps are arranged along at least two edges of the cover plate.

[0009] In one possible implementation, the infrared lamp is disposed between the third surface of the cover plate and the frame of the electronic device, wherein the third surface of the cover plate is the connecting surface between the first surface and the second surface of the cover plate.

[0010] In one possible implementation, the cover plate includes a planar region and an arcuate region extending from the edge of the planar region, the infrared lamp being disposed between a second surface of the arcuate region and the mid-frame of the electronic device, the second surface of the cover plate including the second surface of the arcuate region.

[0011] In one possible implementation, it further includes: a first quarter glass slide, a polarizer, and a second quarter glass slide; the first quarter glass slide is disposed between the cover plate and the polarizer, and the second quarter glass slide is disposed between the polarizer and the display layer.

[0012] In one possible implementation, the display screen further includes: a light-shielding layer; the light-shielding layer is disposed in a non-pixel area of ​​the display layer; the light-shielding layer is used to filter out or absorb light with a wavelength less than a wavelength threshold, wherein the wavelength threshold is greater than 750nm.

[0013] In one possible implementation, the system further includes: a flexible circuit board; the at least one infrared lamp is electrically connected to the under-display optical fingerprint module via the flexible circuit board; the flexible circuit board is configured to transmit the driving signal output by the under-display optical fingerprint module to the at least one infrared lamp, so that the at least one infrared lamp emits an infrared signal toward the cover plate under the drive of the driving signal.

[0014] According to a second aspect of the present application, an under-display optical fingerprint module is provided, wherein the under-display optical fingerprint module is disposed opposite to the display screen as described in the first aspect of the present application, and the under-display optical fingerprint module is used to perform fingerprint recognition based on infrared reflected signals transmitted into the under-display optical indicator module through a pressing area on a cover plate, wherein the pressing area is opposite to the under-display optical fingerprint module.

[0015] In one possible implementation, the under-display optical fingerprint module includes a filter; the filter is configured to filter out light with wavelengths less than a wavelength threshold, wherein the wavelength threshold is greater than or equal to 750 nm.

[0016] According to a third aspect of the present application, an electronic device is provided, including a display screen as described in the first aspect of the present application and an under-display optical fingerprint module as described in the second aspect of the present application, wherein the under-display optical fingerprint module is disposed between the display screen and the back cover of the electronic device.

[0017] According to the display screen provided in the embodiments of this application, the display screen includes: a cover plate, a display layer, and at least one infrared lamp. The display layer can display images, and the at least one infrared lamp can emit infrared signals to the cover plate, causing the infrared signals to be transmitted by total internal reflection within the cover plate. The under-display optical fingerprint module can perform fingerprint recognition based on the infrared reflected signals emitted into the under-display optical fingerprint module through the pressing area on the cover plate, thereby realizing the fingerprint recognition function. Since the infrared signal is emitted from the cover plate and reflected by the ridge of the finger only when the finger is pressed on the pressing surface, the infrared signal only penetrates the cover plate once, which can reduce the energy loss of the infrared signal. Furthermore, for circularly polarized light screens, since the reflected infrared signals are signals in all directions, they can penetrate the polarizer to realize the fingerprint recognition function. For POLLESS display screens, the infrared signals can pass through the light-shielding material to realize the fingerprint recognition function. Correspondingly, the light-shielding material only blocks visible light and does not block infrared light, which can improve the display effect of the POLLESS display screen while realizing under-display optical fingerprint recognition. Compared with the prior art, under-display fingerprint recognition function can be realized while using circularly polarized light display screens or POLLESS display screens, which can improve the user experience. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of a display screen provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of a cover plate provided in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of a fingerprint recognition process provided in an embodiment of this application;

[0022] Figure 4 This is a top view of an infrared signal transmission embodiment provided in this application;

[0023] Figure 5 This is a schematic diagram of an infrared lamp provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of another infrared lamp provided in an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of yet another infrared lamp provided in an embodiment of this application;

[0026] Figure 8 This is a schematic diagram of another display screen provided in an embodiment of this application;

[0027] Figure 9 This is a schematic diagram of yet another display screen provided in an embodiment of this application;

[0028] Figure 10 This is a schematic diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0030] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0031] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0032] As mentioned earlier, existing display screens include circularly polarized light display screens and POLLESS display screens that remove the polarizer. For circularly polarized light display screens, since light has polarization properties, commonly used light sources can be divided into circularly polarized light and linearly polarized light. Circularly polarized light is closer to natural light, therefore causing less visual fatigue compared to display screens using linearly polarized light. For POLLESS display screens, since no polarizer is present, the screen brightness is not affected by the polarizer, resulting in higher brightness and a reduction in screen thickness. Currently, electronic devices use circularly polarized light display screens for eye protection, or POLLESS display screens to increase screen brightness and reduce screen thickness. However, the quarter-glass plate placed between the screen cover and the polarizer in the circularly polarized light display screen changes the direction of light reflected from the object to be identified during fingerprint recognition, preventing the reflected light from passing through the polarizer. Since the POLLESS display screen has a light-shielding layer, the light reflected from the object to be identified during fingerprint recognition cannot penetrate the light-shielding layer. Therefore, circularly polarized light display screens and POLLESS display screens cannot perform under-display optical fingerprint recognition.

[0033] This application provides a display screen comprising: a cover plate, a display layer, and at least one infrared lamp. The display layer can display an image, and the at least one infrared lamp can emit infrared signals to the cover plate, causing the infrared signals to be transmitted via total internal reflection within the cover plate. An under-display optical fingerprint module can perform fingerprint recognition based on the infrared reflected signals emitted through the pressing area on the cover plate and into the under-display optical fingerprint module. This enables fingerprint recognition functionality. Since the infrared signal is emitted from the cover plate and reflected by the ridge of the finger only when the finger is pressed on the pressing surface, the infrared signal only penetrates the cover plate once, reducing energy loss of the infrared signal. Furthermore, for circularly polarized light screens, since the reflected infrared signals are signals in all directions, they can penetrate the polarizer to achieve fingerprint recognition functionality. For POLLESS display screens, the infrared signal can pass through a light-shielding material to achieve fingerprint recognition functionality. Correspondingly, the light-shielding material only blocks visible light and does not block infrared light, which can improve the display effect of POLLESS display screens while achieving under-display optical fingerprint recognition. Compared with existing technologies, under-display fingerprint recognition functionality can be achieved while using circularly polarized light display screens or POLLESS display screens, improving the user experience.

[0034] The following examples illustrate the display screen, under-display optical fingerprint module, and electronic device provided in this application.

[0035] Figure 1 This is a schematic diagram of a display screen 100 provided in an embodiment of this application, as shown below. Figure 1As shown, the display screen 100 includes: a cover plate 101, a display layer 102, and at least one infrared lamp 103. The first surface of the cover plate 101 is used to provide a pressing surface, and the second surface of the cover plate 101 is opposite to the first surface of the display layer 102. The second surface of the display layer 102 is opposite to the under-display optical fingerprint module. The display layer 102 can display images. The at least one infrared lamp 103 can emit infrared signals to the cover plate 101, so that the infrared signals are transmitted by total internal reflection within the cover plate 101 when the pressing surface is not pressed, and when the pressing surface is pressed by a finger, part of the infrared signal is emitted out of the cover plate 101 and reflected by the finger to form an infrared reflection signal. The under-display optical fingerprint module can perform fingerprint recognition based on the infrared reflection signal emitted into the under-display optical fingerprint module through the cover plate 101.

[0036] The first surface of the cover plate 101 provides a pressing surface, on which the user can touch the screen and / or perform fingerprint recognition. For example, when a finger is pressed on the cover plate 101 corresponding to the fingerprint recognition area of ​​the under-display optical fingerprint module, fingerprint recognition can be performed through the under-display optical fingerprint module. In one example, the cover plate 101 can be a glass cover plate 101.

[0037] The display layer 102 is disposed below the cover plate 101, that is, the display layer 102 is disposed between the cover plate 101 and the electronic device. The display layer 102 can display images. In one example, the display layer 102 can be an organic light-emitting semiconductor (OLED) display layer. The display layer 102 can display images under the drive of the processor in the electronic device.

[0038] At least one infrared lamp 103 can emit infrared signals to the cover plate 101. When the pressing surface on the cover plate 101 is not pressed, the infrared signal is transmitted by total internal reflection within the cover plate 101. Optionally, in order to achieve total internal reflection transmission of the infrared signal within the cover plate 101, the angle between the emission angle of the infrared signal from at least one infrared lamp 103 and the cover plate 101 is greater than 0 degrees and less than an angle threshold. That is, at least one infrared lamp 103 emits infrared signals into the cover plate 101 at a specific angle, so that the infrared signal is transmitted by total internal reflection within the cover plate 101. When a finger presses on the pressing area, a portion of the infrared signal transmitted by total internal reflection within the cover plate 101 is emitted out of the cover plate 101 and reflected by the finger. The under-display optical fingerprint module can perform fingerprint recognition based on the infrared reflection signal reflected by the finger. In other words, the under-display optical fingerprint module can perform fingerprint recognition based on the infrared reflection signal emitted into the under-display optical fingerprint module through the pressing area on the cover plate 101.

[0039] The specific principles are explained below. Figure 2 This is a schematic diagram of a cover plate 101 provided in an embodiment of this application, as shown below. Figure 2As shown, when a finger is not pressed on the pressing area of ​​the cover plate 101, because the cover plate 101 is an optically dense medium with a refractive index of approximately 1.5, while the air outside the cover plate 101 is an optically rarer medium with a refractive index of approximately 1.0, the difference in refractive index between the cover plate 101 and the air is significant. When the infrared lamp 103 shines an infrared signal into the cover plate 101 at a specific angle, the infrared signal undergoes total internal reflection within the cover plate 101, forming an image as shown. Figure 2 The transmission waveform shown. Figure 3 This is a schematic diagram of a fingerprint recognition process provided in an embodiment of this application, as shown below. Figure 3 As shown, when finger 300 presses on the pressing area of ​​cover plate 101, the ridge line on finger 300 contacts cover plate 101. Human skin is an optically dense medium with a refractive index of approximately 1.5. The refractive indices of human skin and cover plate 101 are similar. At this time, the infrared signal transmitted by total internal reflection in cover plate 101, when it reaches the ridge line on finger 300 in contact with cover plate 101, enters the ridge line. The infrared signal entering the ridge line is reflected by finger 300, forming infrared reflection. The infrared reflected signal passes through the cover plate 101 and enters the under-display optical fingerprint module. When the infrared signal transmitted by total internal reflection in the cover plate 101 reaches the valley line on the finger 300, since there is air between the cover plate 101 and the valley line on the finger 300, the infrared signal continues to be transmitted by total internal reflection within the cover plate 101 and will not exit the cover plate 101. Therefore, the under-display optical fingerprint module can identify the fingerprint image based on the difference between the ridge and valley lines of the infrared signal transmitted from the cover plate 101 to the finger 300, thereby performing fingerprint recognition.

[0040] In one example, infrared lamp 103 can be a light-emitting diode (LED) infrared fill light.

[0041] In this embodiment, the display screen 100 includes a cover plate 101, a display layer 102, and at least one infrared lamp 103. The display layer 102 can display images, and the at least one infrared lamp 103 can emit infrared signals to the cover plate 101, causing the infrared signals to be transmitted via total internal reflection within the cover plate 101. The under-display optical fingerprint module can perform fingerprint recognition based on the infrared reflected signals emitted through the pressing area on the cover plate 101, thereby realizing the fingerprint recognition function. Since the infrared signal is reflected by the ridge of the finger after exiting the cover plate 101 only when the finger is pressed on the pressing surface, the infrared signal only penetrates the cover plate 101 once. By reducing energy loss of infrared signals, and considering that the reflected infrared signals from circularly polarized light screens are signals from all directions, they can penetrate the polarizer to achieve fingerprint recognition, and that for POLLESS display screens, infrared signals can pass through light-blocking materials to achieve fingerprint recognition, and that these materials only block visible light but not infrared light, under-display optical fingerprint recognition can be achieved while improving the display effect of POLLESS display screens. Compared with existing technologies, under-display fingerprint recognition can be achieved using either circularly polarized light display screen 100 or POLLESS display screen 100, thus improving the user experience.

[0042] In one possible implementation, the display screen 100 includes a plurality of infrared lamps 103. When the pressing surface is not pressed, the infrared signals emitted by the plurality of infrared lamps 103 are transmitted in the cover plate 101 along at least two transmission directions, and the infrared signals emitted by the plurality of infrared lamps 103 pass through the pressing area on the cover plate 101. In the direction perpendicular to the pressing surface, the pressing area is opposite to the under-display optical fingerprint module.

[0043] When the display screen 100 includes multiple infrared lamps 103, the infrared signals emitted by the multiple infrared lamps 103 can be transmitted in at least two directions within the cover plate 101, and all pass through the pressing area, forming a mesh structure in the pressing area. Figure 4 This is a top view of an infrared signal transmission embodiment provided in this application. It should be understood that... Figure 4 The mid-infrared signal appears as a straight line when viewed from above, and similar to a line when viewed from the front. Figure 2 The waveform shown is as follows: Figure 4 As shown, the infrared signals emitted by multiple infrared lamps 103 are transmitted in at least two directions within the cover plate 101, forming a mesh structure in the pressing area 1011.

[0044] In one example, the infrared signals emitted by the multiple infrared lamps 103 can be transmitted within the cover plate 101 along at least two transmission directions by changing the emission direction of the infrared signals from the multiple infrared lamps 103. For example: Figure 4 As shown, at least two of the multiple infrared lamps 103 emit radiation in different directions.

[0045] In this embodiment, when the pressing surface is not pressed, the infrared signals emitted by the multiple infrared lamps 103 are transmitted in at least two transmission directions within the cover plate 101, and the infrared signals emitted by the multiple infrared lamps 103 pass through the pressing area on the cover plate 101. This allows the infrared signals to form a mesh structure in the pressing area of ​​the cover plate 101, increasing the signal intensity of the infrared signals in the pressing area. When a finger presses on the pressing area, fingerprint recognition can be performed using the infrared signals with a larger signal intensity. This increases the signal intensity of the infrared reflection signal reflected back by the finger, thereby improving the sensitivity of fingerprint recognition.

[0046] Figure 5 This is a schematic diagram of an infrared lamp 103 provided in an embodiment of this application, as shown below. Figure 5 As shown, multiple infrared lamps 103 can be arranged along at least two edges of the cover plate 101.

[0047] In this embodiment of the application, multiple infrared lamps 103 can be arranged along at least two edges of the cover plate 101, so that the infrared lamps 103 can be placed inside the electronic device. Compared with multiple infrared lamps 103 arranged along one edge of the cover plate 101, multiple infrared lamps 103 arranged along at least two edges of the cover plate 101 can reduce the space occupied by a single edge of the cover plate 101, and more infrared lamps 103 can be arranged to increase the signal amount of infrared signal in the pressing area on the cover plate 101.

[0048] In one possible implementation, such as Figure 5 As shown, the infrared lamp 103 is disposed between the third surface of the cover plate 101 and the frame 201 of the electronic device, wherein the third surface of the cover plate 101 is the connection surface between the first surface and the second surface of the cover plate 101.

[0049] Taking a mobile phone as an example, the bezel 201 is set around the phone, targeting... Figure 5 In the shown straight-screen structure, at least one infrared lamp 103 can be disposed between the third surface of the cover plate 101 and the frame 201 of the electronic device. Figure 6 This is a schematic diagram of another infrared lamp 103 provided in an embodiment of this application, as shown below. Figure 6 As shown, for an irregularly shaped cover plate 101, at least one infrared lamp 103 can also be disposed between the third surface of the cover plate 101 and the frame 201 of the electronic device, the third surface being the connecting surface of the first surface and the second surface.

[0050] In this embodiment of the application, the infrared lamp 103 is disposed between the third surface of the cover plate 101 and the frame 201 of the electronic device. This allows the infrared lamp 103 to be disposed inside the electronic device, and infrared signals can be emitted to the third surface of the cover plate 101 by at least one infrared lamp 103, so that the infrared signals are transmitted by total internal reflection within the cover plate 101, thereby enabling fingerprint recognition when a finger is pressed on the pressing area.

[0051] Figure 7 This is a schematic diagram of another infrared lamp 103 provided in the embodiments of this application, as shown below. Figure 7 As shown, the cover plate 101 includes a planar region and an arcuate region extending from the edge of the planar region. The infrared lamp 103 is disposed between the second surface of the arcuate region and the middle frame 202 of the electronic device. The second surface of the cover plate 101 includes the second surface of the arcuate region.

[0052] When cover plate 101 is as follows Figure 6 and Figure 7 When the screen is curved, i.e., the display screen 100 includes a planar area and an arcuate area extending from the edge of the planar area, the infrared lamp 103 can be disposed between the second surface of the arcuate shape of the arcuate area and the mid-frame 202 of the electronic device. It should be noted that the arcuate area can be formed by extending outward from at least one edge of the planar area, for example: Figure 6 and Figure 7 The mid-arc region is formed by extending from the opposite edge of the planar region.

[0053] In one example, a recessed design can be made in the mid-frame 202 of the electronic device to house the infrared lamp 103. This can further reduce the thickness of the electronic device and prevent the thickness of the infrared lamp 103 from affecting the display screen 100.

[0054] In this embodiment, the cover plate 101 includes a planar area and an arcuate area extending from the edge of the planar area. The infrared lamp 103 is disposed between the second surface of the arcuate area and the middle frame 202 of the electronic device. Compared with the scheme of disposing the infrared lamp 103 between the third surface of the cover plate 101 and the edge 201 of the electronic device, the width or thickness of the electronic device can be reduced, which can improve the user experience.

[0055] Figure 8 This is a schematic diagram of another display screen 100 provided in an embodiment of this application, as shown below. Figure 8 As shown, the display screen 100 also includes a first quarter glass plate 105, a polarizer 106, and a second quarter glass plate 107. The first quarter glass plate 105 is disposed between the cover plate 101 and the polarizer 106, and the second quarter glass plate 107 is disposed between the polarizer 106 and the display layer 102.

[0056] The display screen 100 also includes a first quarter glass plate 105, a polarizer 106, and a second quarter glass plate 107. This allows the emitted light from the display screen 100 to be converted into circularly polarized light. Specifically, the display layer 102 emits light to display an image. The light emitted by the display layer 102 is light from all directions. The light from each direction does not change after passing through the second quarter glass plate 107. The light from each direction exits the second quarter glass plate 107 and enters the polarizer 106. The polarizer 106 converts the light from each direction into linearly polarized light. The first quarter glass plate 105 delays the phase of the linearly polarized light to form circularly polarized light. Thus, the display screen 100 is a circularly polarized light display screen 100.

[0057] When the infrared reflected signal is emitted from the cover plate 101, it enters the first quarter glass plate 105. Since the infrared reflected signal is invisible light in all directions, the infrared reflected signal emitted from the first quarter glass plate 105 is also invisible light in all directions. After the infrared reflected signal is emitted from the first quarter glass plate 105, it enters the polarizer 106. The polarizer 106 converts the infrared reflected signal into linearly polarized light. The second quarter glass plate 107 converts the linearly polarized light into circularly polarized light and then it enters the under-display optical fingerprint module. The under-display optical fingerprint module performs fingerprint recognition based on the infrared reflected signal of circularly polarized light.

[0058] When ambient light enters the display screen 100, since ambient light is omnidirectional, it remains unchanged after passing through the first quarter-glass plate 105. After exiting the first quarter-glass plate 105, the ambient light enters the polarizer 106, which converts it into linearly polarized light. The linearly polarized light then passes through the second quarter-glass plate 107 and is converted into circularly polarized light. After the circularly polarized light reaches the display layer 102, it is at least partially reflected by the display layer 102. At this time, the light reflected by the display layer 102 is circularly polarized. When the reflected circularly polarized light passes through the second quarter-glass plate 107, it is converted into polarized light. Due to the phase delay processing by the second quarter-glass plate 107, the reflected polarized light and the light from the polarizer 106 have different propagation directions, so the reflected polarized light cannot pass through the polarizer 106 and is intercepted by it. This prevents the light reflected by the display layer 102 from exiting the display screen 100, thereby improving the display effect of the display screen 100.

[0059] In this embodiment, the display screen 100 further includes a first quarter glass plate 105, a polarizer 106, and a second quarter glass plate 107. The first quarter glass plate 105 is disposed between the cover plate 101 and the polarizer 106, and the second quarter glass plate 107 is disposed between the polarizer 106 and the display layer 102. This allows the display screen 100 to be converted into a circularly polarized light display screen 100, which can reduce user eye fatigue. Furthermore, the presence of the first quarter glass plate 105 and the second quarter glass plate 107 can prevent ambient light from being reflected by the display layer and exiting the display screen 100 after it has entered the display screen 100, thereby improving the display effect of the display screen 100.

[0060] Figure 9 This is a schematic diagram of another display screen 100 provided in the embodiments of this application, as shown below. Figure 9 As shown, the display screen 100 also includes a light-shielding layer 108, which is disposed in the non-pixel area of ​​the display layer 102. The light-shielding layer 108 can filter out or absorb light with a wavelength less than a wavelength threshold, wherein the wavelength threshold is greater than or equal to 750nm.

[0061] The display screen 100 also includes a light-shielding layer 108, which covers the non-pixel area of ​​the display layer 102 and exposes the pixel area of ​​the display layer 102. When the display layer 102 displays an image, since the light-shielding layer 108 does not cover the display area of ​​the display layer 102, the light emitted by the display screen can pass through the cover plate 101 to display the image. When external ambient light enters the cover plate 101, since the non-pixel area is provided with the light-shielding layer 108, the external ambient light is filtered or absorbed by the display layer 102. The external ambient light will not be reflected by the display layer 102 and will not pass through the cover plate 101, which can improve the display effect. It should also be noted that the light-shielding layer 108 filters or absorbs visible light, that is, it absorbs light with a wavelength less than the wavelength threshold and allows light with a wavelength greater than or equal to the wavelength threshold to pass through. In this way, the infrared reflected signal can pass through the light-shielding layer 108 and enter the under-display optical fingerprint module, so that the under-display optical fingerprint module can perform fingerprint recognition based on the infrared reflected signal.

[0062] In this embodiment, when the display screen 100 does not include a polarizer and a quarter glass plate, i.e., when the display screen 100 is a POLLESS display screen 100, the display screen 100 also includes a light-shielding layer 108. The light-shielding layer 108 is disposed in the non-pixel area of ​​the display layer 102, thereby preventing external ambient light from being reflected by the display layer 102 after entering the cover plate 101, which can improve the display effect of the display screen 100. Moreover, the light-shielding layer 108 can transmit light with a wavelength greater than or equal to a wavelength threshold of 750nm. Therefore, infrared reflection signals can pass through the light-shielding layer 108, enabling the under-display optical fingerprint module to perform fingerprint recognition based on the infrared reflection signal. Under-display optical fingerprint recognition can be realized when using the POLLESS display screen 100.

[0063] In one possible implementation, such as Figure 5 , Figure 6 and Figure 7 As shown, the display screen 100 also includes a flexible circuit board. At least one infrared lamp 103 is electrically connected to the under-display optical fingerprint module through the flexible circuit board. The flexible circuit board can transmit the driving signal output by the under-display optical fingerprint module to at least one infrared lamp 103, so that at least one infrared lamp 103 emits infrared signals to the cover plate 101 under the drive of the driving signal.

[0064] In this embodiment, the display screen 100 further includes a flexible circuit board. At least one infrared lamp 103 is electrically connected to the under-display optical fingerprint module through the flexible circuit board. Thus, when the under-display optical fingerprint module performs fingerprint recognition, it can transmit a driving signal to at least one infrared lamp 103 through the flexible circuit board, causing the infrared lamp 103 to emit infrared signals. The infrared signals are transmitted by total internal reflection within the cover plate 101, thereby enabling fingerprint recognition based on the infrared reflection signal and realizing the fingerprint recognition function.

[0065] This application embodiment also provides an under-display optical fingerprint module, which is disposed opposite to the display screen 100 in any of the above embodiments. The under-display optical fingerprint module can perform fingerprint recognition based on the infrared reflected signal transmitted into the under-display optical indicator module through the pressing area on the cover plate 101, and the pressing area is opposite to the under-display optical fingerprint module.

[0066] In this embodiment, the under-display optical fingerprint module can perform fingerprint recognition based on the infrared reflection signal emitted into the under-display optical indicator module through the pressing area on the cover plate 101. Thus, the display screen 100 opposite to the under-display optical fingerprint module can be set as a circularly polarized display screen 100 or a POLLESS display screen 100. This can achieve under-display optical fingerprint recognition while improving the eye protection effect of the display screen 100, increasing the brightness of the display screen 100, and reducing the thickness of the display screen 100, thereby improving the user experience.

[0067] It should be noted that the specific fingerprint recognition process of the under-display optical fingerprint module provided in this application embodiment can be found in the description of any embodiment of the display screen 100 above, and will not be repeated here.

[0068] In one possible implementation, the under-display optical fingerprint module includes a filter that can filter out light with wavelengths less than a wavelength threshold, wherein the wavelength threshold is greater than or equal to 750nm.

[0069] In this embodiment, the under-display optical fingerprint module includes a filter that can filter out light with wavelengths less than a wavelength threshold, thereby filtering out visible light and allowing the under-display optical fingerprint module to receive only infrared signals. This prevents external ambient light or other light from affecting the fingerprint recognition process of the under-display optical fingerprint module, thereby improving the success rate of fingerprint recognition.

[0070] Figure 10 This is a schematic diagram of an electronic device provided in an embodiment of this application, such as... Figure 10 As shown, the electronic device 400 includes the display screen 100 in any of the above embodiments and the under-display optical fingerprint module 200 in any of the above embodiments. The under-display optical fingerprint module 200 is disposed below the display screen 100, that is, disposed in the housing of the display screen 100 and the electronic device 400.

[0071] In this embodiment, the electronic device 400 includes a display screen 100 and an under-display optical fingerprint module 200. The display screen 100 is a circularly polarized light display screen or a POLLESS display screen. The under-display optical fingerprint module 200 can perform fingerprint recognition based on the infrared reflection signal that is transmitted through the pressing area on the cover and enters the under-display optical indicator module. This can achieve under-display optical fingerprint recognition while reducing user visual fatigue, reducing the thickness of the electronic device, and increasing the brightness of the display screen.

[0072] It should be noted that, depending on the implementation needs, the various components / steps described in the embodiments of this application can be broken down into more components / steps, or two or more components / steps or parts of the operation of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of this application.

[0073] Those skilled in the art will recognize that the units and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this application.

[0074] The above embodiments are only used to illustrate the embodiments of this application, and are not intended to limit the embodiments of this application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of this application. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of this application, and the patent protection scope of the embodiments of this application should be defined by the claims.

Claims

1. A display screen, characterized in that, The display screen includes: a cover plate, a display layer, and at least one infrared lamp; The first surface of the cover plate is used to provide a pressing surface, the second surface of the cover plate is opposite to the first surface of the display layer, and the second surface of the display layer is opposite to the under-display optical fingerprint module; The display layer is configured to display an image; The at least one infrared lamp is configured to emit an infrared signal toward the cover plate, such that the infrared signal is transmitted by total internal reflection within the cover plate when the pressing surface is not pressed, and that when the pressing surface is pressed by a finger, a portion of the infrared signal is emitted from the cover plate and reflected by the finger to form an infrared reflection signal. The under-display optical fingerprint module is used to perform fingerprint recognition based on the infrared reflected signal that is emitted into the under-display optical fingerprint module through the cover plate. The infrared lamp is disposed between the third surface of the cover plate and the frame of the electronic device, wherein the third surface of the cover plate is the connecting surface between the first surface and the second surface of the cover plate.

2. The display screen according to claim 1, characterized in that, The display screen includes a plurality of infrared lamps. When the pressing surface is not pressed, the infrared signals emitted by the plurality of infrared lamps are transmitted in the cover plate along at least two transmission directions, and the infrared signals emitted by the plurality of infrared lamps pass through the pressing area on the cover plate. In the direction perpendicular to the pressing surface, the pressing area is opposite to the under-display optical fingerprint module.

3. The display screen according to claim 2, characterized in that, The plurality of infrared lamps are arranged along at least two edges of the cover plate.

4. The display screen according to claim 1, characterized in that, Also includes: First quarter slide, polarizer, and second quarter slide; The first quarter-glass slide is disposed between the cover plate and the polarizer, and the second quarter-glass slide is disposed between the polarizer and the display layer.

5. The display screen according to claim 1, characterized in that, The display screen also includes a light-shielding layer; The light-shielding layer is disposed in the non-pixel area of ​​the display layer; The light-shielding layer is used to filter out light with wavelengths less than a wavelength threshold, wherein the wavelength threshold is greater than or equal to 750 nm.

6. The display screen according to any one of claims 1-5, characterized in that, The display screen also includes: a flexible circuit board; The at least one infrared lamp is electrically connected to the under-display optical fingerprint module via the flexible circuit board; The flexible circuit board is configured to transmit the driving signal output by the under-display optical fingerprint module to the at least one infrared lamp, so that the at least one infrared lamp emits an infrared signal toward the cover plate under the drive of the driving signal.

7. An under-display optical fingerprint module, characterized in that, The under-display optical fingerprint module is disposed opposite to the display screen as described in any one of claims 1-6. The under-display optical fingerprint module is used for fingerprint recognition based on the infrared reflected signal that is emitted into the under-display optical indicator module through the pressing area on the cover plate. The pressing area is opposite to the under-display optical fingerprint module.

8. The under-display optical fingerprint module according to claim 7, characterized in that, The under-display optical fingerprint module includes a filter; The filter is configured to filter out or absorb light with wavelengths less than a wavelength threshold, wherein the wavelength threshold is greater than or equal to 750 nm.

9. An electronic device, characterized in that, It includes a display screen as described in any one of claims 1-6 and an under-display optical fingerprint module as described in any one of claims 7-8, wherein the under-display optical fingerprint module is disposed between the display screen and the back cover of the electronic device.

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