WO2022134765A1

WO2022134765A1 - Display panel, display screen, and electronic device

Info

Publication number: WO2022134765A1
Application number: PCT/CN2021/124103
Authority: WO
Inventors: 谭森
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-12-25
Filing date: 2021-10-15
Publication date: 2022-06-30
Also published as: CN112701235B; CN112701235A

Abstract

A display panel (10), provided with a light-exiting surface (104), and comprising at least one first light-emitting unit (110), an encapsulation layer (102), and at least one first light control unit (130). The first light-emitting unit (110) is used for emitting first light (110a) towards the light-exiting surface (104), the encapsulation layer (102) covers a light-exiting side of the first light-emitting unit (110), the first light control unit (130) is located between the light-exiting surface (104) and a top surface (120) of the encapsulation layer (102), and the first light control unit (130) is used for reflecting the first light (110a) towards the light-exiting surface (104) and making a first incident angle of the first light (110a) being incident on the light-exiting surface (104) less than a first preset angle, the first incident angle being an included angle between the first light (110a) and the normal line of the light-exiting surface (104), and the first preset angle being a critical angle of total reflection of the first light (110a) on the light-exiting surface (104). A display screen (1), comprising the display panel (10), a cover plate (30), and a polarization assembly (20). An electronic device (100), comprising a housing (2) and the display screen (1) fixedly connected to the housing.

Description

Display panels, displays and electronic equipment

technical field

The present application relates to the field of display technology, and in particular, to a display panel, a display screen and an electronic device.

Background technique

Each functional layer of the display screen has different characteristics, so the material selection criteria for each functional layer are different, and the stacking of functional layers of different materials will reduce the light extraction efficiency of the display panel. Therefore, how to improve the light extraction efficiency of the display panel has become a technical problem to be solved.

SUMMARY OF THE INVENTION

The present application provides a display panel, a display screen and an electronic device with high light extraction efficiency.

In one aspect, the present application provides a display panel, the display panel has a light emitting surface, including:

at least one first light-emitting unit, the first light-emitting unit is configured to emit first light toward the light-emitting surface;

an encapsulation layer covering the light-emitting side of the first light-emitting unit; and

At least one first light control part, the first light control part is located between the light emitting surface and the top surface of the encapsulation layer, the top surface of the encapsulation layer is that the encapsulation layer faces away from the first light-emitting unit The first light control part is used to reflect the first light toward the light exit surface, and make the first incident angle of the first light incident on the light exit surface smaller than the first predetermined angle. Set the angle, the first incident angle is the angle between the first light ray and the normal of the light-emitting surface, and the first preset angle is the total reflection of the first light on the light-emitting surface critical angle.

On the other hand, the present application also provides a display screen, including a cover plate, a polarizing component and the display panel, the cover plate and the polarizing component are arranged on the light exit surface away from the first light control part On one side of the device, the polarizing component is located between the cover plate and the light emitting surface.

In another aspect, the present application also provides an electronic device, comprising a casing and the display screen, and the display screen is fixedly connected to the casing.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the accompanying drawings required in the embodiments will be briefly introduced below.

1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

Fig. 2 is an exploded schematic view of the electronic device shown in Fig. 1;

3 is a schematic plan view of a display screen in the electronic device shown in FIG. 2;

4 is a cross-sectional view of the display screen shown in FIG. 3 along the line A-A;

5 is a schematic cross-sectional view of the display screen shown in FIG. 4 provided with a touch screen;

6 is a schematic cross-sectional view of the display screen shown in FIG. 4 provided with a polarizer, a quarter-wave plate and a display panel;

7 is a schematic cross-sectional view of the display panel shown in FIG. 6 provided with a light-emitting layer, an encapsulation layer, and a light control layer;

FIG. 8 is a schematic cross-sectional view of a light-emitting layer of the display panel shown in FIG. 7 provided with a first light-emitting unit and a second light-emitting unit;

9 is a schematic cross-sectional view of the light control layer of the display panel shown in FIG. 8 provided with a first light control portion;

FIG. 10 is a schematic diagram of the exit path of the light emitted by the first light-emitting unit and the second light-emitting unit shown in FIG. 9;

11 is a schematic cross-sectional view of the light control layer of the display panel shown in FIG. 9 provided with a second light control part and a third light control part;

FIG. 12 is a schematic diagram of an exit path of light emitted by the first light-emitting unit and the second light-emitting unit shown in FIG. 11;

FIG. 13 is a schematic structural diagram of the integral molding of the second light control part and the third light control part of the light control layer shown in FIG. 11;

FIG. 14 is a schematic diagram of another exit path of the light emitted by the first light-emitting unit and the second light-emitting unit shown in FIG. 13;

FIG. 15 is a schematic diagram of still another exit path of the light emitted by the first light-emitting unit and the second light-emitting unit shown in FIG. 13;

16 is a schematic cross-sectional view of the first light control surface and the second light control surface of the first light control portion shown in FIG. 13 arranged obliquely with respect to the light exit surface;

17 is a schematic cross-sectional view of the first light control surface and the second light control surface of the first light control portion shown in FIG. 16 both being convex arcs;

18 is a schematic cross-sectional view of the first light control surface and the second light control surface of the first light control portion shown in FIG. 16 both being concave arcs;

19 is a schematic cross-sectional view of the first light control surface and the second light control surface of the first light control portion shown in FIG. 16 having protrusions;

20 is a schematic cross-sectional view of the orthographic portion of the first light control portion on the light-emitting surface shown in FIG. 16 located between the orthographic projection of the first light-emitting unit on the light-emitting surface and the orthographic projection of the second light-emitting unit on the light-emitting surface;

21 is a schematic cross-sectional view of the orthographic projection of the first light control portion on the light-emitting surface shown in FIG. 16 all located between the orthographic projection of the first light-emitting unit on the light-emitting surface and the orthographic projection of the second light-emitting unit on the light-emitting surface.

Detailed ways

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

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present application. The electronic device 100 includes a display screen 1 and a housing 2 . For example, the electronic device 100 may be a cell phone, a tablet computer, a desktop computer, a laptop computer, an e-reader, a handheld computer, an electronic display screen, a notebook computer, a netbook, and a Personal Digital Assistant (PDA) , Augmented Reality (AR)\Virtual Reality (VR) devices, media players, watches, wristbands and other devices with a display screen 1. The embodiments of the present application take a mobile phone as an example for description.

In the following embodiments, for the convenience of description, the length direction of the electronic device 100 is defined as the X-axis direction. The width direction of the electronic device 100 is defined as the Y-axis direction. The thickness direction of the electronic device 100 is defined as the Z-axis direction.

Please refer to FIG. 1 and FIG. 2 , the housing 2 includes a middle frame 21 and a rear cover 22 that are fixedly connected. The display screen 1 , the middle frame 21 and the back cover 22 are connected in sequence along the thickness direction of the electronic device 100 . The display screen 1 , the middle frame 21 and the back cover 22 are surrounded to form an accommodation space 23 , and the accommodation space 23 can be used for accommodating batteries, motherboards, and the like.

As shown in FIG. 3 , the display screen 1 may be a bendable flexible screen or a conventional rigid screen. The display screen 1 has a display area 11 for displaying pictures. Of course, the display screen 1 may also have a non-display area 12 disposed on one or more sides of the display area 11. It is understood that the non-display area 12 is not used for displaying pictures.

It can be understood that the length direction of the display screen 1 is the length direction of the electronic device 100 . The width direction of the display screen 1 is the width direction of the electronic device 100 . The thickness direction of the display screen 1 is the thickness direction of the electronic device 100 .

As shown in FIG. 4 , the display screen 1 includes a cover plate 30 , a polarizing element 20 and a display panel 10 . Optionally, the cover plate 30 , the polarizing component 20 and the display panel 10 are arranged in sequence along the thickness direction of the display screen 1 .

The cover plate 30 may be a glass cover plate, a transparent composite cover plate, or the like. The cover plate 30 serves to protect the display panel 10 . Optionally, the cover plate 30 has the functions of anti-impact, anti-scratch, anti-oil stain, anti-fingerprint, and enhanced light transmittance after being subjected to coating, polishing, coating and other processes. The cover plate 30 and the polarizing component 20 may be connected by adhesive materials such as Optical Clear Adhesive (OCA), Pressure Sensitive Adhesive (PSA), and Ultraviolet Rays (UV).

Of course, in other embodiments, as shown in FIG. 5 , the display screen 1 may further include a touch screen 40 . The touch screen 40 can be disposed between the cover plate 30 and the polarizing element 20 ; or, the touch screen 40 can also be disposed between the polarizing element 20 and the display panel 10 . The touch screen 40 may be a resistive touch screen, a surface acoustic wave touch screen, a capacitive touch screen, or the like.

Referring to FIG. 4 and FIG. 6 , the polarizing element 20 is used to improve the contrast ratio of the display screen 1 . In one embodiment, the polarizing component 20 includes a polarizer 201 and a quarter-wave plate 202 . The polarizer 201 is disposed between the quarter wave plate 202 and the cover plate 30 . In other words, the polarizer 201 is close to the cover plate 30 in the thickness direction of the display screen 1 , and the quarter wave plate 202 is close to the display panel 10 in the thickness direction of the display screen 1 . Among them, the polarizer 201 is used to form linearly polarized light. The quarter wave plate 202 is used to change the polarization direction of linearly polarized light. The polarizing component 20 is arranged so that after entering the display screen 1 , the external natural light is wholly or partially absorbed, thereby reducing the reflection of the light to the outside of the display screen 1 to enter the user's eyes. That is, the polarizing component 20 can reduce or avoid the reflection of external natural light, and improve the contrast ratio and outdoor visibility of the display screen 1 . Of course, in other embodiments, the above-mentioned quarter-wave plate 202 can be replaced with a half-wave plate. The polarizer assembly 20 and the display panel 10 may be connected by adhesive materials such as OCA, PSA, and UV.

Generally speaking, the refractive index of the cover plate 30 is greater than the refractive index of air. When the light emitted by the display panel 10 is emitted through the interface between the cover plate 30 and the air at a larger incident angle, the light will occur at the interface between the cover plate 30 and the air. Total reflection, the total reflected light cannot be emitted out of the display screen 1 , but is totally reflected back to the cover plate 30 , which reduces the light extraction efficiency of the display panel 10 . Therefore, to improve the light extraction efficiency of the display panel 10 , it is necessary to reduce the total reflection of light at the interface between the cover plate 30 and the air, so that more light can be refracted outside the display screen 1 .

In addition, when the light emitted by the display panel 10 exits the display panel 10 at a relatively large incident angle and strikes the polarizing element 20 (or the adhesive material between the polarizing element 20 and the display panel 10 ), when the light emitted by the display panel 10 and the polarizing element Total reflection will also occur at the interface of 20 (or at the interface between the display panel 10 and the adhesive material), and the totally reflected light cannot be refracted by the polarizing component 20 (or the adhesive material), but is totally reflected back to the display panel 10, so that the light extraction efficiency of the display panel 10 is reduced. Therefore, to improve the light extraction efficiency of the display panel 10, it is also necessary to reduce the total reflection of light at the interface between the display panel 10 and the polarizer 20 (or at the interface between the display panel 10 and the adhesive material), so that the light emitted by the display panel 10 can be more The display panel 10 is multi-refracted.

Of course, in other embodiments, the light emitted by the display panel 10 will also undergo total reflection due to the difference in refractive index between other adjacent functional layers of the display panel 10, which will not be listed one by one in this application.

To this end, the present application provides a display panel 10, which can solve the problem that the light emitted by the display panel 10 is located at the interface between the cover plate 30 and the air, and at the interface between the display panel 10 and the polarizer 20 (or the display panel 10). The total reflection occurs at the interface with the glue material), which leads to the problem that the light extraction efficiency is reduced. The following embodiments omit the adhesive material between the display panel 10 and the polarizing assembly 20 , and take the light emitted by the display panel 10 directly incident on the polarizing assembly 20 as an example to describe the display panel 10 provided in the present application.

As shown in FIG. 7 , the display panel 10 is an organic light emitting display (Organic Light Emitting Display, OLED) panel. The display panel 10 includes a light emitting layer 101 , an encapsulation layer 102 and a light control layer 103 . The light emitting layer 101, the encapsulation layer 102 and the light control layer 103 are sequentially arranged along the thickness direction of the display screen 1 . The cover plate 30 and the polarizing element 20 are disposed on the side of the light control layer 103 away from the encapsulation layer 102 . The display panel 10 has a light emitting surface 104 . The light emitting surface 104 can be understood as the plane on which the light of the display panel 10 exits. In other words, the light emitting surface 104 is the outer surface on the light emitting side of the display panel 10 . In the embodiment of the present application, the light emitting surface 104 of the display panel 10 is the interface between the light control layer 103 and the polarizing element 20 .

Specifically, as shown in FIG. 8 , the light-emitting layer 101 includes at least one first light-emitting unit 110 and at least one second light-emitting unit 112 . The first light-emitting unit 110 corresponds to one sub-pixel in the light-emitting layer 101 . The second light-emitting unit 112 corresponds to another sub-pixel in the light-emitting layer 101 . It can be understood that the first light-emitting unit 110 may be any one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The second light-emitting unit 112 may be any one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The first light-emitting unit 110 is spaced apart from the second light-emitting unit 112 . The first light-emitting unit 110 and the second light-emitting unit 112 are sub-pixels of different colors. Of course, in other embodiments, the light-emitting layer 101 may further include a cathode, an anode, a hole transport layer, an electron transport layer, and the like. Optionally, the first light-emitting unit 110 and the second light-emitting unit 112 are arranged at intervals along the length direction of the display screen 1 or along the width direction of the display screen 1 . The embodiments of the present application are described by taking the example that the first light-emitting unit 110 and the second light-emitting unit 112 are arranged at intervals along the length direction of the display screen 1 .

The encapsulation layer 102 covers the light-emitting side of the light-emitting layer 101 . In other words, the first light emitting unit 110 and the second light emitting unit 112 emit light toward the side where the encapsulation layer 102 is located. The top surface 120 of the encapsulation layer 102 faces the light-emitting surface 104 . In other words, the top surface 120 of the encapsulation layer 102 is the surface of the encapsulation layer on the side away from the light-emitting layer 101 .

The encapsulation layer 102 may be a single-layer film layer or a composite film layer along the thickness direction of the display screen 1 . Optionally, the encapsulation layer 102 is a thin film encapsulation (Thin Film Encap, TFE) layer. The encapsulation layer 102 includes organic thin films and/or inorganic thin films. The organic thin film and/or the inorganic thin film can prevent water and oxygen from invading the conductive lines or reduce the impact on the display panel 10 . The organic thin film and the inorganic thin film may be stacked in the thickness direction of the display screen 1 .

As shown in FIG. 9 , the light control layer 103 is disposed on the side of the encapsulation layer 102 away from the light emitting layer 101 . The light control layer 103 includes at least one first light control part 130 . It can be understood that the number of the first light control parts 130 may be one or more. This embodiment of the present application uses a first light control unit 130 as an example for description. The first light control part 130 is disposed between the light exit surface 104 and the top surface 120 of the encapsulation layer 102 . In one embodiment, opposite sides of the first light control part 130 along the thickness direction of the display screen 1 are respectively attached to the light emitting surface 104 and the top surface 120 of the encapsulation layer 102 . Of course, in other embodiments, the first light control portion 130 may be spaced apart from the top surface 120 and/or the light exit surface 104 of the encapsulation layer 102 . The orthographic projection of the first light control unit 130 on the light emitting surface 104 is at least partially located between the orthographic projection of the first light emitting unit 110 on the light emitting surface 104 and the orthographic projection of the second light emitting unit 112 on the light emitting surface 104 .

As shown in FIG. 9 , the first light control part 130 includes a first light control surface 130a and a second light control surface 130b arranged opposite to each other. The first light control surface 130 a and the second light control surface 130 b are disposed opposite to each other along the length direction of the display screen 1 .

Referring to FIGS. 9 and 10 , the first light control surface 130 a is used to reflect the first light ray 110 a emitted by the first light emitting unit 110 toward the light emitting surface 104 and make the first light ray 110 a incident on the light emitting surface 104 at a first incident angle smaller than the first preset angle. The first incident angle is the angle between the first light ray 110 a and the normal of the light exit surface 104 . The first preset angle is a critical angle at which the first light ray 110 a is totally reflected on the light exit surface 104 . Specifically, for the first incident angle when the first light ray 110a is incident on the light exit surface 104, please refer to the angle α in FIG. 10 . The angle α is smaller than the critical angle at which the first light ray 110 a is totally reflected on the light exit surface 104 . In other words, the exit angle of the first light ray 110a when it exits the light exit surface 104 is less than 90°. Wherein, please refer to the angle θ in FIG. 10 for the exit angle of the first light ray 110 a exiting the light exit surface 104 . 10 clearly shows the angles α and θ, and no hatching is added. It can be understood that the structure of the display screen 1 shown in FIG. 10 is not substantially different from that of the display screen 1 shown in FIG. 9 .

The second light control surface 130b is configured to reflect the second light 112a emitted by the second light emitting unit 112 toward the light exit surface 104, and make the third incident angle of the second light 112a incident on the light exit surface 104 smaller than the third predetermined angle. The third incident angle is the angle between the second light ray 112 a and the normal of the light exit surface 104 . The third preset angle is the critical angle at which the second light ray 112 a is totally reflected on the light exit surface 104 . Specifically, for the third incident angle when the second light ray 112 a is incident on the light exit surface 104 , please refer to the angle β in FIG. 11 . The angle β is smaller than the critical angle at which the second light ray 112 a is totally reflected on the light exit surface 104 . In other words, the exit angle of the second light ray 112a when it exits the light exit surface 104 is less than 90°. Wherein, please refer to FIG. 11 for the exit angle of the second light 112a when it exits the light exit surface 104

horn.

The light emitted by the first light emitting unit 110 is incident on the light exit surface 104 at an angle smaller than the critical angle of total reflection at the light control layer 103 . The light emitted by the second light emitting unit 112 is incident on the light exit surface 104 at an angle smaller than the critical angle of total reflection at the light control layer 103 . Therefore, no light from the light emitting surface 104 returns to the light control layer 103 due to total reflection, so that all the light of the display panel 10 can be refracted to the polarizing element 20 through the light emitting surface 104 to improve the light emitting efficiency of the display panel 10 .

In one embodiment, please refer to FIG. 9 and FIG. 10 , after the first light 110a emitted by the first light emitting unit 110 is reflected by the first light control surface 130a, the exit angle θ of the light exiting the light exit surface 104 is greater than or equal to 45° and less than 90°. After the second light 112a emitted by the second light emitting unit 112 is reflected by the second light control surface 130b, it exits the exit angle of the light exit surface 104

Greater than or equal to 45° and less than 90°. After that, the first light 110a and the second light 112a are approximately incident on the cover plate 30 through the polarizer 20 at an incident angle greater than or equal to 45° and less than 90°. The first light 110a and the second light 112a at the interface and the interface between the cover plate 30 and the air can be refracted outside the display screen 1, and less at the interface between the polarizer 20 and the cover plate 30, the cover plate Total reflection occurs at the boundary between 30 and the air, which can further improve the light extraction efficiency of the display panel 10 .

In another embodiment, after the first light 110a emitted by the first light emitting unit 110 passes through the first light control surface 130a, the exit angle θ of the first light ray 110a exiting the light exit surface 104 is greater than or equal to 0° and less than 45°. After the second light 112a emitted by the second light emitting unit 112 is reflected by the second light control surface 130b, it exits the exit angle of the light exit surface 104

Greater than or equal to 0° and less than 45°. Thereafter, the first light ray 110a and the second light ray 112a are approximately incident on the cover plate 30 through the polarizer 20 at an incident angle greater than or equal to 0° and less than 45°. The incident angle is relatively small, and is smaller than the critical angle of total reflection of the first light 110a and the second light 112a at the interface between the polarizing element 20 and the cover plate 30 and at the interface between the cover plate 30 and the air. The first light 110a and the second light 112a at the interface between the assembly 20 and the cover 30 and at the interface between the cover 30 and the air can all be refracted out of the display screen 1, which can better improve the display effect of the display screen 1 .

By disposing the first light control part 130 between the light exit surface 104 of the display panel 10 and the top surface 120 of the encapsulation layer 102 , the first light control part 130 is used to reflect the light emitted by at least one first light emitting unit 110 toward the light exit surface 104 . A light 110a, and the first incident angle of the first light 110a incident on the light exit surface 104 is smaller than the first predetermined angle, and the first light control part 130 is used for reflecting at least one second light emitting unit 112 toward the light exit surface 104 to emit light and the third incident angle of the second light 112a when incident on the light exit surface 104 is smaller than the third preset angle, so that the total reflection of the second light 112a on the light exit surface 104 of the display panel 10 can be avoided, Furthermore, the first light ray 110 a and the second light ray 112 a can be more refracted outside the display panel 10 , thereby improving the light extraction efficiency of the display panel 10 .

Further, as shown in FIG. 11 , the light control layer 103 further includes a second light control part 131 and a third light control part 132 . The second light control part 131 and the third light control part 132 are respectively disposed on opposite sides of the first light control part 130 along the length direction of the display screen 1 . That is, the second light control unit 131 , the first light control unit 130 , and the third light control unit 132 are arranged adjacent to each other in order along the length direction of the display screen 1 .

Referring to FIG. 11 and FIG. 12 , the second light control portion 131 includes a first bottom surface 131 a and a first side surface 131 b disposed adjacent to each other. The first bottom surface 131 a is adhered to the top surface 120 of the encapsulation layer 102 to form a first interface 121 . The first side surface 131b is attached to the first light control surface 130a. The second light control portion 131 is configured to refract the first light ray 110a emitted by the first light emitting unit 110 to the first light control surface 130a, and make the second incident angle of the first light ray 110a incident on the first interface 121 smaller than the first light ray 110a incident on the first interface 121. Two preset angles. The second incident angle is the included angle between the first light ray 110 a and the normal of the first interface 121 . The second preset angle is the critical angle at which the first light ray 110 a is totally reflected at the first interface 121 . For the second incident angle, please refer to the γ angle in FIG. 12 . It can be understood that the first light ray 110a is not totally reflected at the first interface 121.

The third light control part 132 includes a second bottom surface 132a and a second side surface 132b which are arranged adjacently. The second bottom surface 132 a is adhered to the top surface 120 of the encapsulation layer 102 to form a second interface 122 . The second side surface 132b is attached to the second light control surface 130b. The third light control portion 132 is configured to refract the second light ray 112a emitted by the second light emitting unit 112 to the second light control surface 130b, and make the fourth incident angle of the second light ray 112a incident on the second interface 122 smaller than the first Four preset corners. The fourth incident angle is the included angle between the second light ray 112 a and the normal of the second interface 122 . The fourth preset angle is the critical angle at which the second light ray 112 a is totally reflected at the second interface 122 . For the fourth incident angle, please refer to the delta angle in FIG. 12 . It can be understood that the second light ray 112a is not totally reflected at the second interface 122 . 12 clearly shows the γ and δ angles, and no hatching is added. It can be understood that the structure of the display screen 1 shown in FIG. 11 is not substantially different from that of the display screen 1 shown in FIG. 11 .

By disposing the second light control part 131 so that the second light control part 131 refracts the first light 110a emitted by the first light emitting unit 110 to the first light control surface 130a, the first light received by the first light control surface 130a can be increased. 110a, so that the first light control surface 130a can emit more first light rays 110a out of the display panel 10. It can be understood that when the first light ray 110a reflected by the first light control surface 130a increases, the first light ray 110a that exits the light emitting surface 104 at an angle smaller than the first preset angle increases accordingly, that is, the total reflection occurs on the light emitting surface 104. The first light ray 110a decreases, and the first light ray 110a that exits the display panel 10 increases. Therefore, the light extraction efficiency of the display panel 10 can be improved.

By arranging the third light control part 132 so that the third light control part 132 refracts the second light 112a emitted by the second light emitting unit 112 to the second light control surface 130b, the second light received by the second light control surface 130b can be increased. 112a, so that the second light control surface 130b can emit more second light rays 112a out of the display panel 10. It can be understood that when the second light ray 112a reflected by the second light control surface 130b increases, the second light ray 112a that exits the light emitting surface 104 at a smaller angle than the third preset angle increases accordingly, that is, the total reflection occurs on the light emitting surface 104. The second light rays 112a are reduced, and the second light rays 112a emitted out of the display panel 10 are increased. Therefore, the light extraction efficiency of the display panel 10 can be improved.

Optionally, the second light control part 131 and the third light control part 132 are film layers with a higher refractive index.

In one embodiment, as shown in FIG. 13 , the second light control portion 131 and the third light control portion 132 are integrally formed to simplify the process steps. The second light control portion 131 and the third light control portion 132 have the same refractive index. The refractive index of the second light control part 131 and the refractive index of the third light control part 132 are greater than or equal to the refractive index of the encapsulation layer 102 .

In one embodiment, referring to FIGS. 12 and 13 , the refractive index of the second light control portion 131 and the refractive index of the third light control portion 132 are greater than the refractive index of the encapsulation layer 102 . The first light 110a emitted by the first light emitting unit 110 is refracted by the encapsulation layer 102 to the second light control portion 131 and incident on the first light control surface 130a. The second light 112a emitted by the second light emitting unit 112 is refracted by the encapsulation layer 102 to the third light control portion 132 and incident on the first light control surface 130a. It can be understood that since the refractive index of the second light control portion 131 is greater than the refractive index of the encapsulation layer 102 , the first light ray 110 a is not totally reflected at the first interface 121 . Since the refractive index of the third light control portion 132 is greater than the refractive index of the encapsulation layer 102 , the second light ray 112 a is not totally reflected at the second interface 122 . In this embodiment, the total reflection of the first light ray 110a emitted by the first light-emitting unit 110 at the first interface 121 is avoided, and the total reflection of the first light 110a emitted by the second light-emitting unit 112 at the second interface is avoided. reflection, the first light 110a received by the first light control surface 130a and the second light 112a received by the second light control surface 130b can be correspondingly increased, so that the first light control surface 130a can reflect more first light 110a, and the second light The light control surface 130b can reflect more second light rays 112a.

In another embodiment, please refer to FIGS. 13 and 14 , the refractive index of the second light control part 131 is equal to the refractive index of the encapsulation layer 102 , and the first light 110 a emitted by the first light emitting unit 110 passes through the encapsulation layer 102 , the second light The control part 131 is directly incident on the first light control surface 130a. In other words, the first light rays 110a are not totally reflected or reflected at the first interface 121 between the encapsulation layer 102 and the third light control part 132 , but are directly incident on the first light control surface 130a. The refractive index of the third light control portion 132 is equal to the refractive index of the encapsulation layer 102 , and the second light 112 a emitted by the second light emitting unit 112 directly enters the second light control surface 130 b through the encapsulation layer 102 and the third light control portion 132 . In other words, the second light rays 112a are not totally reflected at the second interface 122 between the encapsulation layer 102 and the third light control part 132, nor are they reflected, but all straightly strike the second light control surface 130b. In this embodiment, by reducing the total reflection and reflection of the first light ray 110 a at the first interface 121 , the first light ray 110 a that can be reflected by the first light control surface 130 a can be increased. By reducing the total reflection and reflection of the second light ray 112a at the second interface 122, the second light ray 112a that can be reflected by the second light control surface 130b can be increased.

Optionally, please refer to FIG. 13 and FIG. 15 , the refractive index of the first light control part 130 is smaller than the refractive index of the encapsulation layer 102 . In one embodiment, the refractive index of the encapsulation layer 102 is 1.7-1.9, and the refractive index of the first light control part 130 is 1.4-1.6. The first light 110a emitted by the first light emitting unit 110 is incident on the first light control surface 130a after passing through the encapsulation layer 102 and the second light control portion 131, and is emitted through the light exit surface 104 after being totally reflected by the first light control surface 130a. The second light 112a emitted by the second light emitting unit 112 is incident on the second light control surface 130b after passing through the encapsulation layer 102 and the third light control portion 132, and is emitted through the light exit surface 104 after being totally reflected by the second light control surface 130b. In other words, the incident angle of the first light ray 110a incident on the first light control surface 130a is greater than the critical angle at which the first light ray 110a is totally reflected on the first light control surface 130a. The incident angle of the second light ray 112a incident on the second light control surface 130b is greater than the critical angle at which the second light ray 112a is totally reflected on the second light control surface 130b.

14 and 15 are used to illustrate the exit path of the light emitted by the display panel 10. In order to clearly show the exit path of the light, no cross section is added in FIGS. 14 and 15. It can be understood that the The structure of the display screen 1 shown in FIG. 13 is not substantially different from that of the display screen 1 shown in FIG. 13 .

By setting the refractive index of the first light control portion 130 to be smaller than the refractive index of the encapsulation layer 102, the first light 110a emitted by the first light emitting unit 110 can be totally reflected on the light exit surface 104 through the first light control surface 130a, and the light emitting surface 104 can be controlled. The angle of the first light ray 110a after being reflected by the first light control surface 130a enables the light reflected by the first light control surface 130a to be approximately perpendicular to the light exit surface 104 . At the same time, the second light 112a emitted by the second light emitting unit 112 can be totally reflected on the light emitting surface 104 by the second light control surface 130b, and the angle of the second light 112a after being reflected by the second light control surface 130b can be controlled to realize the The light reflected by the two light control surfaces 130b can be approximately perpendicular to the polarizing element 20 .

Optionally, as shown in FIG. 16 , the first bottom surface 131 a of the second light control part 131 , the bottom surface 130 c of the first light control part 130 and the second bottom surface 132 a of the third light control part 132 form the bottom surface of the light control layer 103 . The bottom surface of the light control layer 103 is attached to the top surface 120 of the encapsulation layer 102 and is parallel to the light exit surface 104 . The bottom surface 130c of the first light control part 130 is located between the first light control surface 130a and the second light control surface 130b. In other words, the first light control surface 130a, the bottom surface 130c of the first light control part 130, and the second light control surface 130b are arranged adjacent to each other in order. The first light control surface 130 a is inclined with respect to the light exit surface 104 , that is, the first light control surface 130 a is inclined with respect to the bottom surface 130 c of the first light control portion 130 . The second light control surface 130b is inclined with respect to the light exit surface 104 , that is, the second light control surface 130b is inclined with respect to the bottom surface 130c of the first light control portion 130 .

In one embodiment, the included angle between the first light control surface 130a and the bottom surface 130c of the first light control portion 130 is 30°˜50°. The angle between the second light control surface 130b and the bottom surface 130c of the first light control part 130 is 30°˜50°.

By slanting the first light control surface 130 a relative to the bottom surface 130 c of the first light control portion 130 , the first incident angle of the first light ray 110 a emitted by the first light emitting unit 110 incident on the light exit surface 104 can be adjusted. By slanting the second light control surface 130b with respect to the bottom surface 130c of the first light control part 130 , the third incident angle of the second light 112a emitted by the second light emitting unit 112 can be adjusted when incident on the light exit surface 104 . When both the first incident angle and the second incident angle are relatively small, the first light 110 a and the second light 112 a can be approximately perpendicular to the polarizing element 20 , thereby improving the display brightness of the display screen 1 .

Optionally, the first light control surface 130a is an outer convex arc shape or the first light control surface 130a is an inner concave arc shape. The second light control surface 130b is an outer convex arc shape or the second light control surface 130b is an inner concave arc shape.

In one embodiment, please refer to FIG. 15 and FIG. 17 , the first light control surface 130a is in a convex arc shape, and the second light control surface 130b is in a convex arc shape. In this embodiment, by setting the first light control surface 130a and the second light control surface 130b to be convex arcs, when the height of the first light control portion 130 is constant, it is beneficial to increase the first light control surface 130a and the second light control surface 130a. The area of the light control surface 130b increases, thereby increasing the light reflected by the first light control surface 130a and the second light control surface 130b respectively. In addition, the convex arc-shaped first light control surface 130 a increases the inclination angle of the first light control surface 130 a relative to the bottom surface 130 c of the first light control portion 130 , which is beneficial to reduce the first light emitted by the first light emitting unit 110 The first incident angle when 110a is reflected on the light exit surface 104 by the first light control surface 130a. The convex arc-shaped second light control surface 130b increases the inclination angle of the second light control surface 130b with respect to the bottom surface 130c of the first light control portion 130, which is beneficial to reduce the emission of the second light 112a emitted by the second light emitting unit 112. The third incident angle when the second light control surface 130b reflects on the light exit surface 104 .

In another embodiment, please refer to FIGS. 15 and 18 , the first light control surface 130a is in a concave arc shape, and the second light control surface 130b is in a concave arc shape.

In this embodiment, by setting the first light control surface 130a and the second light control surface 130b to be concave arcs, when the height of the first light control portion 130 is constant, it is beneficial to increase the first light control surface 130a and the second light control surface 130a. The area of the light control surface 130b increases, thereby increasing the light reflected by the first light control surface 130a and the second light control surface 130b respectively. In addition, the concave arc-shaped first light control surface 130a facilitates the convergence of the first light ray 110a emitted by the first light emitting unit 110 when the first light ray 110a is reflected on the light exit surface 104 by the first light control surface 130a, thereby improving the display brightness . The concave arc-shaped second light control surface 130b facilitates the convergence of the second light rays 112a when the light emitted by the second light emitting unit 112 is reflected on the light exit surface 104 by the second light control surface 130b, thereby improving the display brightness.

Of course, in other embodiments, the first light control surface 130a may be a concave arc shape, and the second light control surface 130b may be a convex arc shape; The two light control surfaces 130b may be concave arcs.

Optionally, please refer to FIGS. 15 and 19 , the first light control surface 130 a is provided with a first protrusion 1301 , and the first protrusion 1301 is used to scatter the first light 110 a emitted by the first light emitting unit 110 . The second light control surface 130b is provided with a second protrusion 1302, and the second protrusion 1302 is used for scattering the light emitted by the second light emitting unit 112. The number of the first protrusions 1301 is plural, and the number of the second protrusions 1302 is plural. In one embodiment, the first protrusions 1301 are particle structures disposed on the first light control surface 130a. The second protrusions 1302 are particle structures disposed on the second light control surface 130b.

By arranging the first protrusions 1301 on the first light control surface 130a, when the first incident angle of the first light ray 110a emitted by the first light emitting unit 110 when it is incident on the light exit surface 104 is less than the first preset angle, the The emitted first light 110a is dispersed, so that the light emitting area of the first light emitting unit 110 can be increased. By arranging the second protrusions 1302 on the second light control surface 130b, it is possible to ensure that the third incident angle of the second light 112a emitted by the second light emitting unit 112 is smaller than the third preset angle when the second light 112a emitted by the second light emitting unit 112 is incident on the light exit surface 104. The emitted second light 112a is dispersed, so that the light-emitting area of the second light-emitting unit 112 can be increased. In other words, the first protrusions 1301 provided on the first light control surface 130a and the second protrusions 1302 provided on the second light control surface 130b are beneficial to improve the viewable area of the display screen 1 .

Optionally, the orthographic projection of the first light control surface 130 a on the light exit surface 104 is at least partially located outside the first light emitting unit 110 . The orthographic projection of the second light control surface 130 b on the light exit surface 104 is at least partially located outside the second light emitting unit 112 .

In one embodiment, as shown in FIG. 20 , the orthographic projection portion of the first light control portion 130 on the light emitting surface 104 is located between the first light emitting unit 110 and the second light emitting unit 112 . The orthographic portion of the first light control surface 130a on the light exit surface 104 covers the first light emitting unit 110 , and the other portion of the orthographic projection of the first light control surface 130a on the light exit surface 104 is located between the first light emitting unit 110 and the second light emitting unit 112 . between. The orthographic part of the second light control surface 130b on the light exit surface 104 covers the second light emitting unit 112 , and the other part of the orthographic projection of the second light control surface 130b on the light exit surface 104 is located between the first light emitting unit 110 and the second light emitting unit 112 between.

In another embodiment, as shown in FIG. 21 , the orthographic projection of the first light control portion 130 on the light emitting surface 104 is located between the first light emitting unit 110 and the second light emitting unit 112 . The orthographic projection of the first light control surface 130 a on the light exit surface 104 is located between the first light emitting unit 110 and the second light emitting unit 112 . The orthographic projection of the second light control surface 130 b on the light exit surface 104 is located between the first light emitting unit 110 and the second light emitting unit 112 . In this embodiment, the orthographic projection of the first light control surface 130a on the light exit surface 104 and the orthographic projection of the second light control surface 130b on the light exit surface 104 are both located between the first light emitting unit 110 and the second light emitting unit 112, and further For the first light ray 110a with a larger angle emitted from the side of the first light emitting unit 110 close to the second light emitting unit 112, the first light control surface 130a also has better reflection efficiency. For the second light emitting unit 112 close to the first light emitting unit 112 The second light ray 112a with a larger angle emitted from the side of the unit 110 and the second light control surface 130b also have better reflection efficiency.

In the above two embodiments, by making the orthographic projection of the first light control part 130 on the light emitting surface 104 at least partially located between the first light emitting unit 110 and the second light emitting unit 112, the effect of the first light control part 130 on the first light control part 130 can be reduced. The influence of the first light rays 110a emitted by the light emitting unit 110 with a smaller angle of exit is reduced, and the influence of the first light control part 130 on the second light rays 112a emitted by the second light emitting unit 112 with a smaller angle of exit is reduced. In other words, the arrangement position of the first light control part 130 in this embodiment can reduce the covering and blocking of the first light emitting unit 110 and the second light emitting unit 112, and improve the luminous efficiency of the first light emitting unit 110 and the second light emitting unit 112. In addition, the change of the light path of the first light-emitting unit 110 and the second light-emitting unit 112 by the first light control part 130 is reduced, and the display effect is improved. In addition, it can be understood that the arrangement position of the first light control part 130 in this embodiment reduces the coverage and shielding of the first light emitting unit 110 and the second light emitting unit 112 , which can increase the light emitting capacity of the first light emitting unit 110 in the display panel 10 . The effective light emitting area and the effective light emitting area of the second light emitting unit 112 can improve the resolution of the display panel 10 . Further, in this embodiment, the setting position of the first light control part 130 has little influence on the light exit and reflection paths of the display device under the display screen 1 or with an optical sensor, a fingerprint recognition module, etc. in the display screen 1. It is beneficial to improve the image quality and improve the sensitivity of fingerprint recognition.

The above are some embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also regarded as the present invention. The scope of protection applied for.

Claims

A display panel, the display panel has a light emitting surface, characterized in that it includes:

at least one first light-emitting unit, the first light-emitting unit is configured to emit first light toward the light-emitting surface;

an encapsulation layer covering the light-emitting side of the first light-emitting unit; and

At least one first light control part, the first light control part is located between the light emitting surface and the top surface of the encapsulation layer, the top surface of the encapsulation layer is that the encapsulation layer faces away from the first light-emitting unit the surface of one side, the first light control part is used to reflect the first light toward the light exit surface, and make the first incident angle of the first light incident on the light exit surface smaller than the first predetermined angle Set the angle, the first incident angle is the angle between the first light ray and the normal of the light-emitting surface, and the first preset angle is the total reflection of the first light on the light-emitting surface critical angle.
The display panel according to claim 1, wherein the first light control part comprises a first light control surface, the first light control surface is inclined relative to the light exit surface, and the first light control surface for reflecting the first light.
The display panel of claim 2, wherein a refractive index of the first light control portion is smaller than a refractive index of the encapsulation layer, and the first light is totally reflected on the first light control surface.
The display panel of claim 2, wherein the first light control surface is provided with protrusions, and the first light is scattered on the first light control surface.
The display panel according to claim 2, wherein the first light control surface is in an outwardly convex arc shape; or, the first light control surface is in an inwardly concave arc shape.
The display panel according to claim 2, wherein the orthographic projection of the first light control surface on the light emitting surface is at least partially located outside the orthographic projection of the first light emitting unit on the light emitting surface.
The display panel according to any one of claims 2 to 6, wherein the bottom surface of the first light control part is parallel to the light exit surface, and the first light control surface and the first light control part are The included angle between the bottom surfaces is 30° to 50°.
The display panel according to any one of claims 2 to 6, wherein after the first light is reflected by the first light control surface, an exit angle of the first light exiting the light exit surface is greater than or equal to 45° and less than 90°.
The display panel according to any one of claims 2 to 6, wherein after the first light passes through the first light control surface, an exit angle of the first light exiting the light exit surface is greater than or equal to 0° and less than or equal to 0°. 45°.
The display panel according to any one of claims 1 to 6, wherein the orthographic projection of the first light control portion on the light-emitting surface is at least partially located on the front of the first light-emitting unit on the light-emitting surface beyond projection.
The display panel according to any one of claims 2 to 6, wherein the display panel further comprises a second light control part, and the second light control part comprises an adjacent first bottom surface and a first side surface, A first interface is formed between the first bottom surface and the top surface of the encapsulation layer, the first side surface is attached to the first light control surface, and the first light is incident on the first interface When the second angle of incidence is smaller than the second preset angle; wherein, the second angle of incidence is the angle between the first light ray and the normal of the first interface, and the second preset angle is the critical angle at which the first light rays are totally reflected at the first interface.
The display panel according to claim 11, wherein the refractive index of the second light control part is greater than or equal to the refractive index of the encapsulation layer.
The display panel according to claim 11, wherein the display panel further comprises at least one second light-emitting unit, and the second light-emitting unit is disposed on a side of the encapsulation layer away from the first light control part , and the second light-emitting unit is spaced from the first light-emitting unit, and the second light-emitting unit is used to emit second light toward the light-emitting surface; The projection is at least partially located between the orthographic projection of the first light-emitting unit on the light-emitting surface and the orthographic projection of the second light-emitting unit on the light-emitting surface.
The display panel according to claim 13, wherein the first light control part further comprises a second light control surface arranged opposite to the first light control surface, and the second light control surface is used for reflection the second light, and the third incident angle when the second light is incident on the light exit surface is smaller than the third preset angle, and the third incident angle is the difference between the second light and the light exit surface. The included angle between the normals, and the third preset angle is the critical angle at which the second light rays are totally reflected on the light emitting surface.
The display panel according to claim 14, wherein the second light control surface is inclined relative to the light exit surface.
The display panel according to claim 14, wherein the orthographic projection of the second light control surface on the light exit surface is at least partially located outside the orthographic projection of the second light emitting unit on the light exit surface.
The display panel according to claim 13, wherein the display panel further comprises a third light control part, and the third light control part is at least partially disposed on the first light control part away from the second light one side of the control part, the third light control part includes a second bottom surface and a second side surface adjacent to each other, a second interface is formed between the second bottom surface and the top surface of the encapsulation layer, the second The side surface is attached to the second light control surface, and the fourth incident angle of the second light incident on the second interface is smaller than the fourth preset angle; wherein, the fourth incident angle is the first The included angle between the two light rays and the normal line of the second interface, and the fourth preset angle is a critical angle at which the second light rays are totally reflected at the second interface.
The display panel according to claim 17, wherein the third light control part and the second light control part are integrally formed.
A display screen, characterized in that it includes a cover plate, a polarizing component, and the display panel according to any one of claims 1 to 18, wherein the cover plate and the polarizing component are arranged on the light-emitting surface away from the first On one side of a light control part, the polarizing component is located between the cover plate and the light emitting surface.
An electronic device, characterized in that it comprises a casing and the display screen according to claim 19, wherein the display screen is fixedly connected to the casing.