CN109061946B

CN109061946B - Display screen assembly and electronic equipment

Info

Publication number: CN109061946B
Application number: CN201811015789.2A
Authority: CN
Inventors: 张海平
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2022-03-11
Anticipated expiration: 2038-08-31
Also published as: CN109061946A

Abstract

The application provides a display screen subassembly and electronic equipment, the display screen subassembly includes: the backlight module is used for providing a first optical signal and is provided with a signal transmission channel, and the signal transmission channel is provided with a signal emergent port; a receiving element disposed opposite to the signal exit port to receive a second optical signal emitted from the signal exit port, the second optical signal having a wavelength different from that of the first optical signal; and the light supplementing element is positioned between the backlight module and the receiving element and used for supplementing light to the signal transmission channel. The light supplementing piece is arranged between the backlight module of the display screen assembly and the receiving element, and can supplement light to the area, provided with the signal transmission channel, on the backlight module, so that the brightness difference between the area, corresponding to the signal transmission channel, of the display screen assembly and other areas is avoided, and the backlight brightness uniformity of the display screen assembly is improved.

Description

Display screen assembly and electronic equipment

Technical Field

The application relates to the technical field of electronics, concretely relates to display screen assembly and electronic equipment.

Background

With the development of modularity of electronic components such as a display screen and a fingerprint identification module, the problem of uneven backlight brightness of the display screen may be caused by the modularity of the electronic components such as the display screen and the fingerprint identification module.

Disclosure of Invention

The application provides a display screen assembly and electronic equipment, improves the luminance homogeneity in a poor light of display screen.

In one aspect, the present application provides a display screen assembly, comprising:

the backlight module is used for providing a first optical signal, the first optical signal is used for lightening the display screen assembly, the backlight module is provided with a signal transmission channel, and the signal transmission channel is provided with a signal emergent port;

a receiving element disposed opposite to the signal exit port to receive a second optical signal emitted from the signal exit port, the second optical signal having a wavelength different from that of the first optical signal; and

and the light supplementing piece is positioned between the backlight module and the receiving element and is used for supplementing light to the signal transmission channel.

On the other hand, the application also provides electronic equipment, and the electronic equipment comprises any one of the display screen assemblies.

The backlight module is provided with the signal transmission channel, the receiving element transmits signals through the signal transmission channel, the backlight module provides backlight for the display screen assembly, the signal transmission channel is arranged on the backlight module, the signal transmission channel cannot provide backlight, and the light supplementing piece is arranged between the backlight module and the receiving element of the display screen assembly and can supplement light for the area on the backlight module, in order to avoid brightness difference between the area of the display screen assembly corresponding to the signal transmission channel and other areas, thereby improving the uniformity of backlight brightness of the display screen assembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 2 is a cross-sectional view of a first display screen assembly in an electronic device provided in an embodiment of the present application.

FIG. 3 is a cross-sectional view of a second display screen assembly of the display screen assemblies provided by embodiments of the present application.

Fig. 4 is a partial enlarged view of a display screen assembly in the electronic device provided in fig. 3.

Fig. 5 is a cross-sectional view of a third display screen assembly in an electronic device provided by an embodiment of the present application.

Fig. 6 is a cross-sectional view of a fourth display screen assembly in an electronic device provided by an embodiment of the present application.

Fig. 7 is a cross-sectional view of a fifth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 8 is a top view of a sixth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 9 is a top view of a seventh display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 10 is a top view of an eighth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 11 is a top view of a ninth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 12 is a cross-sectional view of a tenth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 13 is a cross-sectional view of an eleventh display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 14 is a cross-sectional view of a twelfth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 15 is a cross-sectional view of a thirteenth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 16 is a cross-sectional view of a fourteenth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 17 is a partial cross-sectional view of a fifteenth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 18 is a cross-sectional view of a light guide plate in a display panel assembly according to an embodiment of the present disclosure.

Fig. 19 is a partial cross-sectional view of a sixteenth display screen assembly in an electronic device according to an embodiment of the present application.

Fig. 20 is a partial cross-sectional view of a seventeenth display screen assembly in an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions of 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, fig. 1 is an electronic device 100 according to an embodiment of the present disclosure, where the electronic device 100 includes a display screen assembly 10, and the display screen assembly 10 may be used for displaying images, touch operations, fingerprint identification, and other functions. The electronic device 100 may be a mobile phone, a notebook, a palm computer, an electronic reader, a television, an intelligent appliance, a wearable electronic device, a vehicle-mounted display, or other electronic product with a display function. For convenience of description, the width direction of the electronic device 100 is defined as the X direction, the length direction of the electronic device 100 is defined as the Y direction, and the thickness direction of the electronic device 100 is defined as the Z direction.

Referring to fig. 2, fig. 2 is a display screen assembly 10 according to an embodiment of the present disclosure, in which the display screen assembly 10 includes a backlight module 1, a receiving element 2, and a light supplement element 3. The backlight module 1 is configured to provide the first optical signal a, where the first optical signal a is used to light the display panel assembly 10, and specifically, the first optical signal a may enable the display panel assembly 10 to be turned from a screen-off state to a screen-on state. The backlight module 1 has a signal transmission channel 11. The signal transmission channel 11 has a signal exit port 13. The receiving element 2 is disposed opposite to the signal exit port 13 to receive the second optical signal b emitted from the signal exit port 13, the wavelength of the second optical signal b being different from the wavelength of the first optical signal a. The light supplementing piece 3 is located between the backlight module 1 and the receiving element 2, and the light supplementing piece 3 is used for emitting a third optical signal c to supplement light to the signal transmission channel 11. It is understood that the first and third optical signals a, c may be visible light.

Set up signal transmission channel 11 on backlight unit 1, receiving element 2 carries out signal transmission through signal transmission channel 11, and backlight unit 1 provides the back light for display screen subassembly 10, because backlight unit 1 sets up signal transmission channel 11, lead to signal transmission channel 11 department can't provide the back light, through set up light supplementing piece 3 between backlight unit 1 and receiving element 2 of display screen subassembly 10, this light supplementing piece 3 can carry out the light supplementing to the region that sets up signal transmission channel 11 on backlight unit 1, in order to avoid display screen subassembly 10 to correspond to and set up the regional brightness difference that produces between the region of signal transmission channel 11 and other regions 15, thereby improve the backlight luminance homogeneity of display screen subassembly 10.

It can be understood that, referring to fig. 2, the second optical signal b may be invisible light. In this embodiment, the second optical signal b may be infrared light. In other embodiments, the second optical signal b may also be ultraviolet light or the like. The first light signal a may be visible light for illuminating the display screen assembly 10. Correspondingly, the backlight module 1 is provided with a signal transmission channel 11. The second optical signal b may be incident on the receiving element 2 through the signal transmission channel 11. Wherein, the receiving element 2 may be a fingerprint identification chip. In other words, after the second optical signal b is incident on the receiving element 2, the receiving element 2 can convert the second optical signal b into an electrical signal for fingerprint recognition. Meanwhile, since the light compensating member 3 is disposed in the signal transmission channel 11, and the light emitted from the light compensating member 3 is visible light, the position of the display screen assembly 10 of the signal transmission channel 11 is illuminated. In other words, the signal transmission channel 11 can transmit the visible light emitted by the light supplement component 3 to supplement light to the area of the display screen assembly 10 facing the signal transmission channel 11, and the signal transmission channel 11 can also transmit the second optical signal b, so that the receiving element 2 arranged opposite to the backlight module 1 can receive the second optical signal b to perform fingerprint identification and the like.

Further, referring to fig. 2, the emitting direction of the third optical signal c emitted by the light supplement element 3 is opposite to the direction in which the second optical signal b enters the receiving element 2.

It can be understood that, referring to fig. 2, the light compensating member 3 can emit a light signal b, which can be visible light, so that the light intensity at the signal transmission channel 11 is similar to the light intensity at other areas of the backlight module 1, which is difficult for human eyes to distinguish, thereby improving the backlight uniformity of the display panel assembly 10.

It can be understood that, in the Z direction, the region of the backlight module 1 except the signal transmission channel 11 has a smaller transmittance or is not capable of transmitting the second optical signal b.

It will be appreciated that the second optical signal b may be an optical signal, an acoustic signal, etc. The signal transmission channel 11 may be a through hole or a light-transmitting portion having a high transmittance (for example, a transmittance of 70% to 99%) with respect to the second optical signal b, or a combination of the through hole and the light-transmitting portion. The receiving element 2 is a receiver for receiving the second optical signal b, and in particular, the receiving element 2 is used for converting the second optical signal b into an electrical signal.

It is understood that the second optical signal b may be from a signal emitted by an emitting element within the electronic device 100, and the second optical signal b may also be from an environment outside the electronic device 100. Specifically, the second optical signal b may be a combination of any one or more of fingerprint information, palm print information, iris information, ear print information, face information, ambient light intensity, distance information between the display screen and the subject to be recognized, image information, and the like.

It will be appreciated that the receiving element 2 is arranged opposite the signal exit opening 13, and that the signal exit opening 13 may at least partially overlap the receiving element 2 in an orthographic projection of the receiving element 2. Specifically, the receiving element 2 may be directly opposite to the signal exit port 13, so that the receiving element 2 receives as many second optical signals b as possible, thereby improving the signal identification accuracy of the receiving element 2.

In the present embodiment, the second optical signal b is an optical signal having fingerprint information, and the receiving element 2 is a fingerprint sensor. Of course, the protection scope of the present application includes, but is not limited to, the second optical signal b being an optical signal with fingerprint information, and the receiving element 2 being a fingerprint identification sensor.

In one embodiment, referring to fig. 3, the display screen assembly 10 further includes a transparent cover plate 4 and an emitting element 5. The transparent cover 4 is provided with a fingerprint identification area 41. The fingerprint identification area 41 is used for identifying fingerprint information of the body 43 to be identified. Specifically, when the user operates the electronic apparatus 100, the user places the fingerprint surface 45 on the fingerprint identification area 41 to perform fingerprint identification. In particular, the placement of the fingerprint surface 45 on the fingerprint identification area 41 may be such that the fingerprint surface 45 is in contact with the fingerprint identification area 41 or the fingerprint surface 45 is suspended above the fingerprint identification area 41. Specifically, the fingerprint surface 45 of the body 43 to be recognized may be a fingerprint surface 45 of a finger or a palm print of a palm or the like.

Referring to fig. 3, the signal transmission channel 11 has a signal entrance port 17 opposite to the signal exit port 13, and the fingerprint identification area 41 is opposite to the signal entrance port 17 of the signal transmission channel 11, so that the third optical signal c emitted by the light supplement member 3 sequentially exits through the signal transmission channel 11 and the fingerprint identification area 41. In other words, the orthographic projection area of the fingerprint identification area 41 on the backlight module 1 may at least partially overlap with the signal entrance port 17, so that the second optical signal b may enter the signal entrance port 17 through the fingerprint identification area 41. Specifically, after the second optical signal b can pass through the fingerprint identification area 41, the second optical signal b enters the signal transmission channel 11 from the signal entrance port 17, exits the signal transmission channel 11 from the signal exit port 13, and is finally projected to the receiving element 2, so that the receiving element 2 receives the second optical signal b and performs fingerprint identification according to the second optical signal b.

Referring to fig. 3, the emitting element 5 is disposed to be staggered with respect to the fingerprint identification area 41. The transmitting element 5 is at a predetermined distance L from the fingerprint identification area 41. The emitting element 5 is used for emitting the detection signal d towards the body 43 to be identified, so that the detection signal d is reflected in the body 43 to be identified and emitted from the fingerprint surface 45 of the body 43 to be identified, so as to form a second optical signal b with fingerprint information. The second optical signal b is projected to the receiving device 2 through the fingerprint identification area 41, the signal transmission channel 11 and the light supplement element 3 in sequence.

Specifically, referring to fig. 3, the emitting element 5 and the fingerprint identification area 41 may be staggered in a manner that the emitting element 5 and the fingerprint identification area 41 have a predetermined distance L in the x direction or the y direction, and the predetermined distance L enables the detection signal d to enter the body 43 to be identified from an area outside the fingerprint surface 45 and to exit from the fingerprint surface 45 of the body 43 to be identified after multiple refractions and reflections occur in the body 43 to be identified. Specifically, the emitting element 5 is disposed to be offset from the fingerprint identification area 41, so that an incident area of the detection signal d on the body 43 to be identified and an emergent area of the detection signal d on the body 43 to be identified (i.e., the fingerprint surface 45) are different areas.

Referring to fig. 4, when the detection signal d is projected from the inside of the body 43 to be identified to the fingerprint surface 45, most of the detection signal d is emitted from the slope 453 between the ridge 451 and the valley 452, so that the signal intensity at the valley 452 is higher, the signal intensity at the ridge 451 is lower, and the signal intensities at the valley 452 and the ridge 451 in the second optical signal b are different, that is, the second optical signal b can reflect fingerprint information. It is understood that when the detection signal d is used for identifying a fingerprint, the detection signal d may be visible light or invisible light or ultrasonic waves. The emitting element 5 may be an emitter, such as a light emitting diode or the like, for emitting visible or invisible light or ultrasound.

Through set up transmitting element 5 and receiving element 2 in display screen subassembly 10, the detecting signal d that transmitting element 5 sent is inside waiting to discern body 43 after emitting display screen subassembly 10 and is reflected, and from waiting to discern body 43 of fingerprint face 45 of body 43, detecting signal d refracts and emits the signal of different intensity in valley 452 department and ridge 451 department of fingerprint face 45, in order to reflect the fingerprint information of fingerprint face 45, because detecting signal d is through refracting in valley 452 department and ridge 451 department of fingerprint face 45 in order to acquire the fingerprint information of fingerprint face 45, so the fingerprint identification process can not receive the influence of the environmental factor such as the degree of dryness and wetness of waiting to discern body 43, problem, thereby improve fingerprint identification success rate.

Referring to fig. 5, the display panel assembly 10 further includes a liquid crystal module 6. The liquid crystal module 6 is located between the transparent cover plate 4 and the backlight module 1. The liquid crystal module 6 is used for displaying images under the first optical signal a emitted by the backlight module 1. The fingerprint identification area 41 is opposite to the liquid crystal module 6. The emitting element 5 and the liquid crystal module 6 are arranged side by side on the transparent cover plate 4.

It can be understood that the liquid crystal module 6 has a higher transmittance for the second optical signal b. The second optical signal b sequentially passes through the fingerprint identification area 41, the liquid crystal module 6, the signal transmission channel 11 and the light supplement element 3 until being projected to the receiving element 2. Specifically, the liquid crystal module 6 may include a color filter substrate 61, a liquid crystal layer 62, and a thin film transistor array substrate 63 stacked in sequence. The liquid crystal module 6 is matched with the backlight module 1 to realize the display function.

Specifically, the area of the transparent cover 4 covering the liquid crystal module 6 forms the display area 101 of the display panel assembly 10. The display area 101 has a display function. The area of the light-transmissive cover 4 that extends beyond the light-emitting display area 101 is the non-display area 103 of the display screen assembly 10. The non-display area 103 surrounds the display area 101. Fingerprint identification district 41 is just to liquid crystal module 6, and fingerprint identification district 41 is located display area 101 promptly to realize electronic equipment 100's display area 101 fingerprint identification, set up in non-display area 103 with reducing fingerprint identification district 41, occupy the area of non-display area 103, thereby improve electronic equipment 100's screen ratio of taking up.

Specifically, the fingerprint identification area 41 may be close to the non-display area 103. The emitting element 5 and the liquid crystal module 6 are disposed side by side on the transparent cover 4, and the emitting element 5 and the liquid crystal module 6 may be disposed at an interval, i.e. the emitting element 5 is located in the non-display region 103. The fingerprint identification area 41 and the emission element 5 have a preset distance L, and the preset distance L can be 5-15 mm, so that when the fingerprint surface 45 of the user faces the fingerprint identification area 41, other areas 15 of the hand of the user can contact or be close to the emission element 5, so that the detection signal d emitted by the emission element 5 can enter the hand of the user and be emitted from the fingerprint surface 45 after being reflected by the hand of the user.

It will be appreciated that referring to fig. 5, the display screen assembly 10 also includes a processor 7. The processor 7 electrically connects the transmitting element 5 and the receiving element 2. When fingerprint identification is required, the processor 7 can control the transmitting element 5 to transmit the detection signal d, and the processor 7 controls the receiving element 2 to receive the second optical signal b, so as to perform fingerprint identification. When fingerprint identification is not required, the processor 7 may control the transmitting element 5 to no longer transmit the detection signal d and the receiving element 2 to no longer receive the second optical signal b, so as to reduce power consumption of the transmitting element 5 and the receiving element 2, thereby reducing power consumption of the display screen assembly 10.

The emitting element 5 may be, for example, a light emitting diode. The detection signal d may be infrared light. The wavelength of the detection signal d may be 800-900 nm, such as 850 nm. The second light signal b may be infrared light with fingerprint information. The receiving element 2 may be a photodiode for receiving infrared light. When the fingerprint surface 45 of the user contacts the fingerprint identification area 41, the processor 7 controls the emitting element 5 to emit a detection signal d, the detection signal d is emitted into the finger of the user and reflected in the finger, part of the detection signal d is emitted from the fingerprint surface 45 to form a second optical signal b with fingerprint information, the second optical signal b is projected to the receiving element 2 through the fingerprint identification area 41, the signal transmission channel 11 and the light supplement element 3, the receiving element 2 receives the second optical signal b under the control of the processor 7 and identifies the fingerprint information, the processor 7 judges whether the fingerprint information is matched with the preset fingerprint information, and if the result is yes, next operation is performed, for example, a display screen is turned on and the fingerprint is unlocked, a payment function is realized, and the like. In addition, the processor 7 may also collect and store the current fingerprint information, so that the current fingerprint information forms the preset fingerprint information.

Referring to fig. 6 and fig. 7, the transmitting element 5 and the receiving element 2 can be located in the display area 101, so that the area occupied by the transmitting element 5 and the receiving element 2 in the non-display area 103 can be further reduced, and the screen ratio of the display screen assembly 10 can be further improved.

Specifically, referring to fig. 6, the emitting device 5 may be located in the thin film transistor array substrate 63 of the liquid crystal module 6, so that the emitting device 5 may be manufactured by the thin film transistors in the thin film transistor array substrate 63 in the same process.

Specifically, referring to fig. 7, the emitting device 5 and the receiving device 2 may be disposed at one side of the backlight module 2. The backlight module 2 is further provided with an emission channel 201. A light emitting member 202 is further disposed between the backlight module 2 and the emitting element 5. The detection signal d emitted by the emitting element 5 is emitted out of the display screen assembly 10 through the light emitting element 202 and the emitting channel 201, then is emitted into the body 43 to be identified, is emitted from the fingerprint surface 45 after being reflected in the body 43 to be identified, and forms a second optical signal b, and the second optical signal b is projected to the receiving element 2 through the fingerprint identification area 41, the signal transmission channel 11 and the light supplementing element 3 in sequence, so that the receiving element 2 obtains fingerprint information.

Referring to fig. 8, the number of the emitting elements 5 is two. The two transmitting elements 5 are symmetrically arranged on two opposite sides of the receiving element 2. I.e. the distance between the two transmitting elements 5 and the receiving element 2 may be equal. Two transmitting elements 5 simultaneously transmit detection signal d to waiting to discern body 43 and carry out fingerprint identification, can increase detection signal d's intensity, and then increase second light signal b's intensity to increase fingerprint identification's efficiency.

Referring to fig. 9, the number of the emitting elements 5 may also be multiple. The plurality of transmitting elements 5 are symmetrically distributed on two opposite sides of the receiving element 2. The greater the number of the emitting elements 5, the stronger the signal intensity of the detection signal d, so that a larger distance can be set between the emitting elements 5 and the fingerprint identification area 41, and further, when the emitting elements 5 are located in the non-display area 103 of the display screen, the fingerprint identification area 41 can be flexibly located in the central area of the display area 101 or at a position far away from the emitting elements 5.

Referring to fig. 10, the number of the transmitting elements 5 may also be multiple, and a plurality of the transmitting elements 5 are located in the display area 101 and surround the peripheral side of the receiving element 2.

Referring to fig. 11, the number of the transmitting elements 5 may also be multiple, and multiple transmitting elements 5 are located in the non-display area 103 and surround the peripheral side of the receiving element 2.

Referring to fig. 8 to 10, the fingerprint identification area 41 is a partial area of the display area 101. Referring to fig. 11, the fingerprint identification area 41 may be the entire display area 101.

The detection signal d may be an infrared light, near infrared light, ultraviolet light, near ultraviolet light, ultrasonic signal, or the like.

When the detection signal d is the optical signal b, the emitting element 5 may be a light emitting diode or a light emitting triode; the emitting element 5 may also be an LED lamp or the like.

When the detection signal d is invisible light such as infrared light, near-infrared light, ultraviolet light, near-ultraviolet light and the like, the influence of the emission of the detection signal d and the reception of the second optical signal b on the display function of the display screen can be reduced.

The display assembly 10 may be a Liquid Crystal Display (LCD) or the like.

Referring to fig. 3, the light supplement device 3 is a surface light source. The light emitting surface 31 of the light compensating part 3 is used for emitting an optical signal b, which may be visible light. In other words, the light emitting surface 31 of the light supplement element 3 may form a surface light source. The light emitting surface 31 of the light compensating member 3 is opposite to the signal exit port 13, that is, the surface light source is opposite to the signal exit port 13. The signal transmission channel 11 is arranged in the backlight module 1, the brightness of the signal transmission channel 11 can be less than that of the other area 15 on the backlight module 1, and the brightness of the light in the signal transmission channel 11 is compensated by arranging a surface light source at the signal exit 13, so that the brightness of the signal transmission channel 11 is similar to or the same as that of the other area 15 on the backlight module 1.

Referring to fig. 12, the light supplement member 3 includes a light guide member 33 and a light supplement source 35. The light supplement source 35 is disposed opposite to at least one surface of the light guide member 33. The light supplement source 35 is configured to emit a third light signal cc toward the light guide 33, so that the third light signal cc is emitted from the light emitting surface 31 of the light supplement component 3. Specifically, the light guide 33 forms a light emitting surface 31 of the light supplement member 3 facing the surface of the backlight module 1, and the light emitting surface 31 of the light supplement member 3 covers the signal exit port 13. In other words, the light emitting surface 31 of the light compensating member 3 is a solid surface. The light-emitting surface 31 of the light-compensating member 3 covers the signal-emitting port 13 to emit the third optical signal c with uniform brightness at the signal-emitting port 13, so as to increase the intensity of the light in the signal transmission channel 11 and ensure the uniformity of the light in the signal transmission channel 11, so that when a user views a display screen of the display screen assembly 10, the intensity of the light emitted from the signal transmission channel 11 is similar to or the same as the intensity of the light emitted from the other regions 15 of the display area 101.

Specifically, the light guide 33 may face the signal transmission channel 11. The size of the light guide 33 may be matched to the size of the signal transmission channel 11. Specifically, the orthographic projection area of the light guide 33 on the backlight module 1 may coincide with the signal transmission channel 11.

Specifically, the signal transmission channel 11 may be configured to transmit the second optical signal b, and the signal transmission channel 11 may also be configured to transmit the third optical signal c emitted by the light compensating part 3.

Referring to fig. 12, the size of the light guide 33 may be larger than the size of the signal transmission channel 11 and smaller than the size of the backlight module 1. In other words, the light guide 33 has a first surface 331 and a second surface 332 that are disposed opposite to each other, and a side surface 333 that connects the first surface 331 and the second surface 332. The first surface 331 faces the backlight module 1. The first surface 331 may be the light emitting surface 31 of the light compensating part. When the light guide 33 is stacked with the backlight module 1, the light emitted from the light emitting surface 31 of the light compensating member is projected to the backlight module 1. Part of the light emitted from the light emitting surface 31 of the light compensating member exits the display panel assembly 10 through the signal transmission channel 11, and the other part of the light emitted from the light emitting surface 31 of the light compensating member is blocked by the backlight module 1, so that the light from the light emitting surface 31 of the light compensating member does not affect the region outside the signal transmission channel 11 of the backlight module 1.

Referring to fig. 12, the light guide 33 and the light supplement source 35 are disposed side by side on one side of the backlight module 1. In other words, the size of the light guide 33 may be smaller than the size of the backlight module 1. The side 333 of the light guide 33 and the surface 105 of the backlight module 1 facing the light guide 33 form an accommodating space 107 in which the light compensating source 35 can be located, and the light signal b is emitted toward the side 333 of the light guide 33. The light supplementing source 35 is arranged in the accommodating space 107 formed by the light guide member 33 and the backlight module 1, so that the structure is reasonably arranged, and the space is saved.

Referring to fig. 13, the size of the light guide 33 may be equal to or larger than the size of the backlight module 1, and when the size of the light guide 33 is equal to the size of the backlight module 1, the light supplement source 35 may be disposed on a side surface of an assembly formed by stacking the light guide 33 and the backlight module 1, and at this time, the light supplement source 35 serves as a light source of the backlight module 1 and also serves as a light source of the light supplement member 3 to provide backlight for the whole display area 101 of the display screen assembly 10. Because the light source of backlight unit 1 and the light source of light filling piece 3 unite two into one, the luminance in the signal transmission channel 11 and the luminance of the region 15 outside the signal transmission channel 11 in the display area 101 can be the same, and, when the luminance of the control light filling source 35 changes, the luminance in the signal transmission channel 11 and the luminance of the region 15 outside the signal transmission channel 11 in the display area 101 can change together, when avoiding the light source of backlight unit 1 and the light source of light filling piece 3 to control separately, because of reasons such as signal delay, lead to luminance in the signal transmission channel 11 and the luminance of the region 15 outside the signal transmission channel 11 in the display area 101 to appear luminance difference scheduling problem.

Referring to fig. 14, the light supplement member 3 includes a light guide member 33 and a light supplement source 35. The light supplement source 35 is disposed opposite to at least one surface of the light guide member 33. The light guide 33 has a first through hole 334. The first through-hole 334 has a first opening 335 and a second opening 336 disposed opposite to each other. The first opening 335 communicates with the signal exit port 13. The second opening 336 is opposite to the receiving element 2. In other words, the first through hole 334 communicates the signal transmission channel 11 with the receiving element 2. Since the transmittance of the first through hole 334 for the second optical signal b is greater than that of the light guide 33 for the second optical signal b, the first through hole 334 can reduce the loss of the second optical signal b on the light supplement 3.

Specifically, the first through hole 334 may face the signal transmission channel 11, and the second opening 336 may face the receiving element 2, so that the second optical signal b emitted from the first through hole 334 may be directly projected to the receiving element 2.

Referring to fig. 14, the size of the first opening 335 may be larger than the size of the second opening 336, and the inner wall 337 of the first through hole 334 and the light guide 33 face the surface 331 of the backlight module 1 to form the light emitting surface 31 of the light compensating member. In other words, the first through hole 334 is flared. I.e., the first through-hole 334 has a substantially trapezoidal cross-section. The centerline of the first opening 335 may be substantially parallel or coincident with the centerline of the second opening 336 such that the inner wall 337 of the first through-hole 334 is sloped.

Specifically, the size of the first opening 335 may be greater than or equal to the size of the signal exit port 13, so that the inner wall 337 of the first through hole 334 is opposite to the signal exit port 13, and the light of the light supplement plate is emitted into the signal transmission channel 11 from the inner wall 337 of the first through hole 334.

Specifically, the size of the first opening 335 may be smaller than the size of the signal exit port 13, so that the inner wall 337 of the first through hole 334 and the partial surface 331 of the light guide 33 facing the backlight module 1 (i.e., the first surface 331 is connected to a local area of the inner wall 337 of the first through hole 334) are opposite to the signal exit port 13, and the light of the light supplement panel enters the signal transmission channel 11 from the inner wall 337 of the first through hole 334 and the partial surface 331 of the light guide 33 facing the backlight module 1.

The inclined inner wall of the first through hole 334 is the light emitting surface 31 of the light supplement piece, so that the loss of the second optical signal b in the light supplement piece 3 can be reduced, the fingerprint identification accuracy is improved, and the light brightness compensation of the light supplement piece 3 on the signal transmission channel 11 can be realized, so that the brightness uniformity of the display screen is improved.

The light compensating member 3 may also be made of a self-luminous material, for example, the light compensating member 3 is made of an electroluminescent material. The electroluminescent material can emit light in a power-on state, and the light guide member 33 and the light supplement source 35 do not need to be arranged, so that the number of elements is reduced, and the space in the electronic device 100 is saved.

Further, referring to fig. 15, the light supplement element 3 further includes a reflector 34. The reflector 34 is located on a side of the light guide 33 facing away from the backlight module 1. The light supplement source 35 is located on the periphery of the reflector 34 and the light guide 33. The reflector 34 is used for reflecting the third optical signal c emitted by the light supplement source 35, so that the light of the light supplement source 35 is emitted from the light emitting surface 31 of the light supplement element. The reflector 34 can reflect the third optical signal and transmit the second optical signal b. When the third optical signal c emitted by the fill light source 35 is visible light and the second optical signal b is infrared light, the reflector 34 may have a higher reflectivity for visible light and a higher reflectivity for infrared light, and the reflector 34 may block visible light emitted by the fill light source 35 or infrared light outside the display screen assembly 10 from being projected to the receiving element 2, thereby reducing signal interference received by the receiving element 2 and improving fingerprint identification efficiency.

Specifically, referring to fig. 15, the reflective element 34 includes a substrate 341 and a coating layer 342 disposed on the substrate 341, wherein the substrate 341 is configured to transmit the second optical signal b and the third optical signal c. The coating 342 is adjacent to the receiving element 2 relative to the base 341.

Referring to fig. 15, when the third optical signal c emitted by the light supplement source 35 is projected to the coating layer 342, the coating layer 342 reflects the third optical signal c, so that the third optical signal c is emitted out of the backlight module 1 through the signal transmission channel 11; when the second optical signal b is projected to the coating layer 342 through the signal transmission channel 11, the coating layer 342 transmits the second optical signal b, so that the second optical signal b is projected to the receiving element 2.

Referring to fig. 16, the display screen assembly 10 further includes a controller 8. The controller 8 is electrically connected to the light compensating source 35. The controller 8 is used to adjust the brightness of the compensating light source 35. When an external subject (e.g., a user or another electronic device 100) performs operations such as turning off the brightness of the display screen, turning on the brightness of the display screen, decreasing the brightness of the display screen, increasing the brightness of the display screen, etc. on the electronic device 100, the controller 8 controls the brightness change of the light compensating source 35 so that the brightness displayed at the signal transmission channel 11 is the same as or similar to the brightness of the other area 15 of the display area 101.

Referring to fig. 16, the backlight module 1 includes a light source 109. The light source 109 is configured to emit the first optical signal a to provide display light for the display panel assembly 10. The light emitting source 109 and the light supplement source 35 are electrically connected to the controller 8. The controller 8 can simultaneously adjust the brightness of the light source 109 and the light supplement source 35.

By electrically connecting the light source 109 and the light supplement source 35 to the same controller 8, when the electronic device 100 is operated by an external subject (e.g., a user or other electronic device) to change the brightness of the display screen, the controller 8 controls the light source 109 and the light supplement source 35 to change simultaneously, so that the brightness displayed on the signal transmission channel 11 is the same as or similar to the brightness of the other region 15 of the display area 101.

Specifically, the light source 109 and the complementary light source 35 can be controlled by different controllers 8 to make the brightness at the signal transmission channel 11 different from the brightness at other regions 15 of the display area 101. For example, when the other area 15 of the display screen is blank, a faint brightness is set by the brightness at the signal transmission channel 11 as a prompt for the fingerprint recognition area 41.

Referring to fig. 17, the display screen assembly 10 may further include an enclosure 51. The enclosure 51 has a housing cavity 51a, and the housing cavity 51a houses the radiation element 5. The surrounding member 51 is made of a material that is impermeable to the probe signal d or has low transmittance. The enclosure 51 may be used to prevent the emission of the detection signal d. The surrounding member 51 abuts against the transparent cover plate 4, so that the emitting element 5 is fixed to the transparent cover plate 4 and the emitting element emitting detection signal d can exit the display screen assembly 10 through the transparent cover plate 4.

Referring to fig. 17, the backlight module 1 further includes an optical film 121, a light guide plate 122 and a reflective film 123 stacked in sequence. The optical film 121 is away from the light supplement member 3 with respect to the light guide plate 122. The optical film 121 has a second through hole 124. The light guide plate 122 has a conductive channel 125. The reflective film 123 has a third through hole 126. The second through hole 124, the through channel 125, and the third through hole 126 form the signal transmission channel 11.

In particular, the optical film 121 serves to make the brightness of light more uniform and to improve the brightness of light. The optical film 121 may include a light uniformizing film 1202 and a brightness enhancing film 1201. The light uniformizing film 1201 is for making the luminance more uniform. The brightness enhancement film 1201 can reflect the light entering the liquid crystal module 6 through the transparent lens to enhance the brightness of the light. The reflective film 123 is used to reflect light so that the light is emitted from the light guide plate 122 toward the optical film 121.

Specifically, referring to fig. 17, the backlight module 1 further includes a supporting plate 127, and the supporting plate 127 is located on a side of the reflective film 123 far away from the light guide plate 122. The supporting plate 127 serves to support the reflective film 123. The supporting plate 127 may be made of metal. The supporting plate 127 may block the third optical signal c and the second optical signal b emitted from the light compensating member 3, so that the opening 128 is disposed on the supporting plate 127, and the opening 128 is aligned with the signal transmission channel 11. The size of the aperture 128 may be equal to or slightly larger than the signal exit port 13. The supporting plate 127 and the reflective film 123 can block the light emitted from the light emitting surface 31 of the light compensating element 3 from interfering with the brightness of the region 15 outside the signal transmission channel 11 in the display region 101, so as to ensure that the light compensating element 3 performs light compensation on the signal transmission channel 11.

Specifically, the second through hole 124 and the third through hole 126 may be circular, so that the second optical signal b is received by the receiving element 2 in a circular optical column. Of course, in other embodiments, the second and third through

holes

124, 126 may be oval or rectangular, etc.

Referring to fig. 18, the conducting channel 125 of the light guide plate 122 has a first plane 129 and a second plane 130 disposed opposite to each other, and a light guide medium 131 located between the first plane 129 and the second plane 130, so that the second optical signal b penetrates through the light guide medium 131 from the first plane 129 and is guided out from the second plane 130. It can be understood that the portion of the light guide plate 122 except for the conduction channel 125 is provided with the reflection array dot 1203, and the reflection array dot 1203 is used for diffusing the light inside the light guide plate 122, so as to make the brightness of the light inside the light guide plate 122 uniform. In this embodiment, the conducting channel 125 of the light guide plate 122 is not provided with the reflective array dot 1203, so that the diffusion and reflection of the second optical signal b by the conducting channel 125 of the light guide plate 122 can be reduced.

Through set up second through-hole 124 in optical film 121, set up third through-hole 126 in reflectance coating 123 and set up in light guide plate 122 and lead to passageway 125, do not set up optical film 121 and reflectance coating 123 in signal transmission passageway 11 promptly, can reduce signal transmission passageway 11 and to the second light signal b and the blockking of the third light signal c that light filling spare 3 jetted out, and then reduce the loss of second light signal b in signal transmission passageway 11 to make receiving element 2 receive more second light signals b, improve fingerprint identification efficiency.

Further, referring to fig. 17, the second through hole 124, the conducting channel and the third through hole 126 are aligned with each other. The second through hole 124, the conducting channel 125 and the third through hole 126 form a linearly extending signal transmission channel 11, and the linearly extending signal transmission channel 11 can enable the second optical signal b to smoothly penetrate through, so as to reduce reflection and shielding of the second optical signal b.

Specifically, the size of the third via hole 126 may be greater than or equal to the size of the second via hole 124, so as to further reduce the shielding of the reflective film 123 on the second optical signal b, and increase the transmittance of the second optical signal b.

Referring to fig. 19, the backlight module 1 further includes a first light-transmitting member 131 and a second light-transmitting member 132. The first light-transmitting member 131 is filled in the second through hole 124, and the second light-transmitting member 132 is filled in the third through hole 126. The first and second light-transmitting

members

131 and 132 are used for transmitting the second and third optical signals b and c. In other words, the second optical signal b may be the optical signal b, and the first light-transmitting member 131 and the second light-transmitting member 132 have high transmittance for the second optical signal b and the third optical signal c emitted from the light supplement member 3.

Specifically, the first light-transmitting member 131 and the second light-transmitting member 132 may be just filled in the second through hole 124 and the third through hole 126, and the first light-transmitting member 131 and the second light-transmitting member 132 may further be fixedly connected to the optical film 121 and the reflective film, respectively, to increase the structural strength of the optical film 121 and the reflective film.

Further, the surface of the first light-transmitting member 131 facing away from the light guide plate 122 is flush with the surface of the optical member facing away from the light guide plate 122, and the surface of the second light-transmitting member 132 facing away from the light guide plate 122 is flush with the surface of the reflective film 123 facing away from the light guide plate 122, so as to improve the surface flatness of the optical film 121 and the reflective film.

Referring to fig. 20, the receiving device 2 includes a support 21, a condenser lens 22, a filter 23, and a photosensitive chip 24. The support 21 is fixedly connected with the light compensating piece 3, and the support 21 is provided with a containing groove 25. The condenser lens 22, the filter 23, and the photo sensor chip 24 are sequentially disposed in the accommodating groove 25. The condenser lens 22, the filter 23, and the photosensitive chip 24 are sequentially disposed in the housing groove 25, and the condenser lens 22 is close to the signal exit port 13 with respect to the filter 23. The opening of the accommodating groove 25 is opposite to the signal exit port 13, so that the second optical signal b passes through the fingerprint identification area 41, the signal transmission channel 11, the light supplement element 3, the opening of the accommodating groove 25, the condensing lens 22 and the optical filter 23 in sequence and is projected onto the photosensitive chip 24.

Specifically, the condenser lens 22 is used for condensing the optical signal b onto the photosensitive chip 24. The optical filter 23 is used for filtering out other light rays except the second optical signal b, so that the photosensitive chip 24 only receives or mostly receives the second optical signal b, thereby reducing the interference of other light rays on fingerprint identification and increasing the accuracy of fingerprint identification.

Further, referring to fig. 20, the inner wall of the accommodating groove 25 has a light shielding layer 26, and the light shielding layer 26 is used for preventing the second optical signal b from emitting and preventing signals outside the accommodating groove 25 from emitting into the accommodating groove 25, so as to reduce interference of other signals in the fingerprint identification process and improve fingerprint identification efficiency.

The foregoing is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. A display screen assembly, the display screen assembly comprising:

the light-transmitting cover plate is provided with a fingerprint identification area; the backlight module is used for transmitting a first optical signal, the first optical signal is used for lightening the display screen assembly, the backlight module is provided with a signal transmission channel, the signal transmission channel is provided with a signal entrance port and a signal exit port which are oppositely arranged, and the fingerprint identification area is opposite to the signal entrance port;

the emission element is staggered with the fingerprint identification area and used for emitting a detection signal towards a to-be-identified main body so that the detection signal is reflected in the to-be-identified main body and is emitted from a fingerprint surface of the to-be-identified main body to form a second optical signal, and the second optical signal enters the signal transmission channel through the fingerprint identification area;

and the light supplementing piece is positioned between the backlight module and the receiving element, a third optical signal emitted by the light supplementing piece sequentially passes through the signal transmission channel and the fingerprint identification area to be emitted, and the light supplementing piece is used for supplementing light to the signal transmission channel.

2. The display panel assembly of claim 1, wherein the light compensating member is a surface light source, and a light emitting surface of the light compensating member is opposite to the signal exit port.

3. The display screen assembly of claim 2, wherein the light compensating member includes a light guiding member and a light compensating source, the light guiding member is opposite to the backlight module, the light compensating source is configured to emit a third light signal toward the light guiding member, a light emitting surface of the light compensating member is formed on a surface of the light guiding member facing the backlight module, and the light emitting surface of the light compensating member covers the signal emitting port.

4. The display screen assembly of claim 2, wherein the light compensating member includes a light guiding member and a light compensating source, the light guiding member is opposite to the backlight module, the light compensating source is configured to emit the third optical signal toward the light guiding member, the light guiding member has a first through hole, the first through hole has a first opening and a second opening that are opposite to each other, the first opening is communicated with the signal exit port, the second opening is opposite to the receiving element, the size of the first opening is larger than that of the second opening, and a light exit surface of the light compensating member is formed by an inner wall of the first through hole and a surface of the light guiding member facing the backlight module.

5. The display screen assembly of claim 3 or 4, wherein the light guide and the light supplement source are disposed side by side on one side of the backlight module.

6. The display screen assembly of claim 5, wherein the light compensating member further comprises a reflecting member, the reflecting member is located on a side of the light guiding member facing away from the backlight module, and the reflecting member is configured to transmit the second light signal and reflect the third light signal.

7. The display screen assembly of claim 6, wherein the reflective member comprises a substrate and a coating disposed on the substrate, the substrate being configured to transmit the second optical signal and the third optical signal, the coating being proximate to the receiving element relative to the substrate;

when the third optical signal emitted by the light supplement source is projected to the coating, the coating reflects the third optical signal so that the third optical signal is emitted out of the backlight module through the signal transmission channel; when the second optical signal is projected to the coating layer through the signal transmission channel, the coating layer transmits the second optical signal, so that the second optical signal is projected to the receiving element.

8. The display panel assembly of claim 3 or 4, wherein the backlight module comprises a light source for emitting the first light signal, the display panel assembly further comprises a controller, the light source and the light supplement source are electrically connected to the controller, and the controller is configured to simultaneously adjust the brightness of the light source and the light supplement source.

9. The display panel assembly of any of claims 1 to 4, wherein the backlight module further comprises an optical film, a light guide plate and a reflective film stacked in sequence, the optical film is away from the light compensating member relative to the light guide plate, the optical film has a second through hole, the light guide plate has a conducting channel, the reflective film has a third through hole, and the second through hole, the conducting channel and the third through hole form the signal transmission channel.

10. The display panel assembly of claim 9, wherein the backlight module further comprises a first light transmissive member and a second light transmissive member, the first light transmissive member is filled in the second through hole, the second light transmissive member is filled in the third through hole, and the first light transmissive member and the second light transmissive member are respectively configured to transmit the second optical signal and the third optical signal.

11. A display screen assembly according to any one of claims 1 to 4, wherein a predetermined distance is provided between the emitter element and the fingerprint identification zone.

12. The display screen assembly of claim 11, further comprising a liquid crystal module disposed between the transparent cover plate and the backlight module, wherein the fingerprint identification area faces the liquid crystal module, the liquid crystal module is configured to display an image under the irradiation of the first optical signal, and the emission element and the liquid crystal module are disposed side by side on the transparent cover plate.

13. The display panel assembly of any one of claims 1 to 4, wherein the receiving element includes a holder, a condensing lens, a filter and a photo sensor chip, the holder has a receiving slot, an opening of the receiving slot is opposite to the signal exit port, the condensing lens, the filter and the photo sensor chip are sequentially disposed in the receiving slot, and the condensing lens is close to the signal exit port relative to the filter.

14. The display panel assembly of claim 13, wherein the inner wall of the receiving groove has a light shielding layer for preventing the second light signal from being emitted.

15. An electronic device, characterized in that the electronic device comprises a display screen assembly according to any one of claims 1 to 14.