WO2022142588A1

WO2022142588A1 - Display device

Info

Publication number: WO2022142588A1
Application number: PCT/CN2021/123593
Authority: WO
Inventors: 李希鹏; 匡许良; 申美鹃; 齐丽娜; 党松; 黄湖
Original assignee: 中兴通讯股份有限公司
Priority date: 2020-12-31
Filing date: 2021-10-13
Publication date: 2022-07-07
Also published as: CN114695709A

Abstract

Embodiments of the present application relate to the technical field of display. Disclosed is a display device, comprising: a photographing unit (1), and a liquid light-emitting layer (2). The photographing unit has a light path (10) for receiving ambient light outside the display device. The liquid light-emitting layer (2) comprises a first light-emitting unit (21) located in a direction of the light path and a second light-emitting unit (22) located outside the direction of the light path. The first light-emitting unit (21) and the second light-emitting unit (22) each comprise flowable quantum dot particles (20). When the display device is in a display state, the quantum dot particles (20) of the first light-emitting unit (21) are located in an area of the light path, and when the display device is in a photographing state, the quantum dot particles (20) in the first light-emitting unit (21) all or partially move out of the area of the light path.

Description

display device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number "202011633362.6" and the application date is December 31, 2020, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference Application.

technical field

The embodiments of the present application relate to the field of display technologies, and in particular, to a display device.

Background technique

OLED (Organic Light-Emitting Diode) is called organic electroluminescent diode. OLED display technology has many advantages, such as all-solid-state, active light-emitting, high contrast, ultra-thin, low power consumption, fast effect speed, wide working range, easy to realize flexible display and 3D display, etc., making it widely used in many display devices. , for example on TVs and mobile devices. As technology advances and consumers' demand for larger-screen phones increases, mobile phone manufacturers have been working to increase the screen-to-body ratio of mobile phones, from so-called bezel-less phones to notch screens, to the design of water drop screens and lift cameras, as well as folding screens With the launch of the mobile phone, the development trend of mobile phones towards a true full screen is relatively clear, and the under-screen camera technology is considered to be the killer solution for a true full screen.

However, the display area above the under-screen camera has pixels, so that the transmittance of this area is affected, resulting in insufficient light input from the under-screen camera and unclear front-facing camera images.

SUMMARY OF THE INVENTION

An embodiment of the present application provides a display device, including: a photographing unit, and a liquid light emitting layer; the photographing unit has an optical path for receiving ambient light; the liquid light emitting layer includes a first light emitting unit located in the direction of the light path and a second light-emitting unit located outside the direction of the optical path; when the display device is in a display state, the quantum dot particles of the first light-emitting unit are located in the area of the optical path, and when the display device is in a shooting state, The quantum dot particles in the first light-emitting unit flow out of the area of the optical path.

In addition, the quantum dot particles include at least first quantum dots and second quantum dots, and the first quantum dots and the second quantum dots are used to form a pixel unit; the display device further includes a first substrate, the The first substrate is arranged on the side of the liquid luminescent layer close to the photographing unit; the first substrate is provided with a plurality of circuit base points distributed at intervals, and when the circuit base points are energized, the quantum dot particles are adsorbed to the The liquid luminescent layer faces the area of the circuit base points, wherein each of the circuit base points adsorbs at least one of the first quantum dots and/or at least one of the second quantum dots.

In addition, the first substrate includes a first area located within the area of the optical path and a second area located outside the area of the optical path; the display device further includes a control circuit, the control circuit and the circuit base point electrical connection; when the display device is in a display state, the control circuit controls the circuit base points of the first area and the second area to energize; when the display device is in a shooting state, the control circuit controls the first area The circuit bases of one area are powered off and the circuit bases of the second area are powered on.

In addition, the first substrate is at least partially located in the area of the optical path, the display device further includes a second substrate and a control circuit, the second substrate is disposed on a part of the first substrate away from the liquid light emitting layer side, and the second substrate is located outside the area of the optical path; the second substrate is provided with a plurality of the circuit base points distributed at intervals, and when the display device is in a display state, the control circuit controls the The circuit base of the first substrate is powered on, and the circuit base of the second substrate is powered off; when the display device is in a shooting state, the control circuit controls the circuit base of the first substrate to be powered off, and the second substrate is powered off. The circuit base points of the substrate are energized.

In addition, the display device further includes a quantum dot storage cavity and a quantum dot transmission pipeline, the quantum dot storage cavity is communicated with the first light-emitting unit via the quantum dot transmission pipeline, and the quantum dot storage cavity is located outside the optical path; the display device further includes a control unit, and when the display device is in a display state, the control unit controls the quantum dot particles in the quantum dot storage cavity to flow to the place where the first light-emitting unit is located. area to form the first light-emitting unit; when the display device is in a shooting state, the control unit controls all or part of the quantum dot particles in the first light-emitting unit to flow to the quantum dot storage cavity.

In addition, the display device further includes a blocking layer disposed between the first light-emitting unit and the second light-emitting unit and used to block the first light-emitting unit and the second light-emitting unit Mutual flow of quantum dots.

In addition, the first light-emitting unit includes a first storage cavity and liquid quantum dots that can flow into and out of the first storage cavity, and the second light-emitting unit includes a second storage cavity and can flow into and out of the first storage cavity. The liquid quantum dots in the second storage cavity; the display device further includes a control unit, and when the display device is in a shooting state, the control unit controls the liquid quantum dots in the first storage cavity to flow to the second storage cavity storage cavity.

In addition, the display device further includes a refraction unit, the refraction unit is arranged on a side of the first light-emitting unit close to the photographing unit, and the refraction unit is located in the area of the optical path; Filled with transparent liquid filler, the transparent liquid filler is used to increase the refractive index of the refraction unit.

In addition, the refraction unit includes a first concave lens, a convex lens and a second concave lens arranged in layers, and the first concave lens is disposed adjacent to the photographing unit; the first concave lens, the convex lens and the second concave lens are all a hollow lens, and the first concave lens, the convex lens and the second concave lens are all filled with the transparent liquid filler; the display device further includes a liquid substance storage cavity, a first liquid substance transmission pipe, a third Two liquid material transmission pipes and a third liquid material transmission pipe; the first concave lens communicates with the liquid material storage cavity via the first liquid material transmission pipe, and the convex lens communicates with the liquid material storage cavity via the second liquid material transmission pipe The liquid substance storage cavity is communicated, and the third liquid substance transmission pipeline is communicated with the liquid substance storage cavity through the third liquid substance transmission pipeline; the display device further includes a control unit, and the control unit uses In the control of injecting the transparent liquid filler in the liquid substance storage cavity into the refraction unit, or extracting the transparent liquid filler in the refraction unit to the liquid substance storage cavity.

In addition, when the display device is in a photographing state, the quantum dot particle density in the first light-emitting unit is smaller than the quantum dot particle density in the second light-emitting unit.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute limitations of the embodiments, and elements with the same reference numerals in the drawings are denoted as similar elements, Unless otherwise stated, the figures in the accompanying drawings do not constitute a scale limitation.

FIG. 1 is a schematic structural diagram of a display device according to a first embodiment of the present application;

FIG. 2 is a schematic structural diagram of a display device of another structure according to the first embodiment of the present application;

3 is a schematic diagram of the luminescence imaging of quantum dot particles according to the first embodiment of the present application;

4 is a schematic structural diagram of a display device according to a second embodiment of the present application;

5 is a schematic structural diagram of a display device according to a third embodiment of the present application;

6 is a schematic structural diagram of a display device of another structure according to the third embodiment of the present application;

FIG. 7 is a schematic structural diagram of a display device according to a fourth embodiment of the present application;

8 is a schematic structural diagram of a refracting unit according to a fourth embodiment of the present application;

FIG. 9 is a system frame diagram of a display device according to a fourth embodiment of the present application.

Detailed ways

At present, the terminal product needs to place a photosensitive module such as a camera under the screen, but the existing screen is provided with a luminescent material layer, resulting in a low light transmittance of the terminal product. When a photosensitive module such as a camera collects light signals from the outside world, the screen cannot guarantee sufficient light to pass through the screen, which makes it difficult for the photosensitive module such as the camera to collect sufficient light, thus affecting the shooting performance of the photosensitive module such as the camera.

In view of the above problems, the present application provides a display device. By providing a liquid light-emitting layer, when the display device is in a shooting state, the quantum dot particles located in the optical path of the shooting unit can flow to the outside of the optical path, which can effectively prevent the quantum dot particles from blocking the outside world. The light enters the photographing unit to improve the light transmittance, so that the display device can satisfy the full-screen display and at the same time improve the photographing performance of the photographing unit.

In the display device provided by the embodiments of the present application, a liquid light-emitting layer formed of flowable quantum dot particles is provided, and the liquid light-emitting layer includes a first light-emitting unit and a second light-emitting unit. When the display device is in a display state, the first light-emitting unit is in the display state. The light-emitting unit is located in the optical path of the photographing unit, that is to say, the area above the photographing unit has the first light-emitting unit so that it can be displayed, thereby realizing the full-screen display of the display device and improving the display effect of the display device; when the display device is in the shooting state When the quantum dot particles in the first light-emitting unit flow to the outside of the light path, the light path of the shooting unit will not be blocked by the quantum dot particles in the first light-emitting unit, which can effectively prevent the quantum dot particles from blocking the external light from entering the shooting unit. The light transmittance is improved, so that the display device can meet the full-screen display while improving the shooting performance of the shooting unit.

In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that, in each embodiment of the present application, many technical details are provided for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be realized.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation on this application.

The terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection or a mutual communication. ; It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

The first embodiment of the present application relates to a display device 100. The specific structure is shown in FIG. 1, including:

The photographing unit 1 and the liquid light emitting layer 2; the photographing unit 1 has an optical path 10 for receiving ambient light; the material of the liquid light emitting layer 2 includes flowable quantum dot particles 20, and the liquid light emitting layer 2 includes a first light emitting unit 21 and a second light emitting unit 21. Light-emitting unit 22; When the display device 100 is in the display state, the first light-emitting unit 21 is located in the area of the optical path 10, and when the display device 100 is in the shooting state, all or part of the quantum dot particles 20 in the first light-emitting unit 21 move to the optical path 10 outside the area.

In this embodiment, the quantum dot particles 20 refer to some extremely tiny semiconductor nanocrystals that cannot be seen by the naked eye. Generally speaking, the quantum dot particles are composed of zinc, cadmium, selenium and sulfur atoms. Quantum dot particles have a distinctive feature: whenever they are stimulated by light or electricity, the quantum dot particles will emit colored light. The color of the light is determined by the composition and size of the quantum dot particles. Particles can change the color of light emitted by a light source. The light-emitting principle of the liquid light-emitting layer 2 is as follows: the liquid light-emitting layer 2 includes an electron layer, a quantum dot layer and a hole layer arranged in layers, and the electrons of the electron layer and the holes of the hole layer converge in the quantum dot layer to form excitons, And emit light through the recombination of excitons.

It can be understood that, when the display device 100 is in the display state, the density of the quantum dot particles 20 in the first light-emitting unit 21 is equal to the density of the quantum dot particles 20 in the second light-emitting unit 22, so as to ensure the uniformity of the display screen; When the display device 100 is in the photographing state, all or part of the quantum dot particles in the first light-emitting unit 21 move to the outside of the first light-emitting unit 21 , so that the density of the quantum dot particles 20 in the first light-emitting unit 21 is smaller than that in the second light-emitting unit 22 Quantum dot particles within 20 density.

Compared with the prior art, in the embodiment of the present application, the liquid light-emitting layer 2 formed by the flowable quantum dot particles 20 is provided, and the liquid light-emitting layer 2 includes the first light-emitting unit 21 and the second light-emitting unit 22. When the device 100 is in the display state, the first light-emitting unit 21 is located in the optical path 10 of the photographing unit 1 , that is, the area above the photographing unit 1 has the first light-emitting unit 21 so that it can be displayed, thereby realizing the full-screen display of the display device 100 , the display effect of the display device 100 is improved; when the display device 100 is in the shooting state, the quantum dot particles 20 in the first light-emitting unit 21 flow out of the light path 10, so that the light path 10 of the shooting unit 1 will not be blocked by the first light-emitting unit The quantum dot particles 20 in the 21 block, which can effectively prevent the quantum dot particles 20 from blocking the external light from entering the photographing unit 1, and improve the light transmittance, so that the display device 100 can satisfy the full-screen display while improving the photographing unit 1. shooting performance.

It is worth noting that the liquid light-emitting layer 2 in this embodiment can emit light under the control of a circuit driving system such as current, voltage, and electronics through electroluminescence technology, and display an image on the display screen. The design of the quantum dot particle 20 itself emits light and mixes colors to produce an image. The design of the drive circuit includes but is not limited to: electronic circuit drive design, control of electron injection quantity, control of voltage or current size, wavelength change control of auxiliary light unit, temperature change of heating unit and other driving methods. For ease of understanding, this embodiment takes the electronic circuit driving design as an example to specifically describe how to control the liquid luminescent layer 2 to emit light and display an image on the display screen in this embodiment:

Please refer to FIG. 2 and FIG. 3 together. Taking quantum dot particles 20 including red quantum dots 201 , green quantum dots 202 and blue quantum dots 203 as an example, one red quantum dot 201 , one green quantum dot 202 and one blue quantum dot 201 The dots 203 together form one pixel unit. The display device 100 further includes a first substrate 3, and the first substrate 3 is disposed on the side of the liquid light emitting layer 2 close to the photographing unit 1; the first substrate 3 is provided with a plurality of circuit base points 30 distributed at intervals, and the circuit base points 30 will The quantum dot particles 20 are adsorbed to the area of the liquid luminescent layer 2 facing the circuit base dots 30 , wherein each circuit base dot 30 shown in FIG. 2 adsorbs a red quantum dot 201 , a green quantum dot 202 and a blue quantum dot 203 .

It is worth mentioning that, in this embodiment, the quantum dot particles 20 including red quantum dots 201 , green quantum dots 202 and blue quantum dots 203 are only one of the most common pixel unit structure examples. For self-luminous technology, there are currently four types of display particles, red, green, blue, and white to form a pixel unit. In addition, the quantum dot particles 20 may also include a combination of non-red quantum dots, non-green quantum dots, and non-blue quantum dots. That is to say, this embodiment does not specifically limit the types of quantum dots included in the quantum dot particles 20 , which can be set according to actual requirements.

It should also be noted that, in this embodiment, each circuit base point 30 adsorbs one red quantum dot 201, one green quantum dot 202, and one blue quantum dot 203, which is only a way to achieve uniform distribution of pixel units. , In practical applications, the uniform distribution of pixel units can also be achieved in other ways, such as: 1. There are three different types of circuit base points, respectively adsorbing red quantum dots 201, green quantum dots 202 and blue quantum dots 203, Each type of circuit base point can adsorb at least one quantum dot with a color corresponding to its type, and three different types of circuit base points are evenly distributed on the first substrate 3; 2. One circuit base point can adsorb multiple pixel units, that is, each Each circuit base point adsorbs a plurality of red quantum dots 201 , a plurality of green quantum dots 202 and a plurality of blue quantum dots 203 . It can be understood that the above-mentioned ways are only a few feasible embodiments for realizing uniform distribution of pixel units, and this embodiment does not specifically limit how to achieve uniform distribution of pixels by adsorbing quantum dots through circuit base points. Can be set according to actual needs.

In this embodiment, FIG. 2 is another feasible structural schematic diagram of the display device 100 in this embodiment. The first substrate 3 is disposed below the photographing unit 1 , so as to prevent the first substrate 3 from blocking external light from entering the photographing unit 1 . The first substrate 3 can be made of polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN) ), polyarylate (PAR) or glass fiber reinforced plastic (FRP) and other polymer materials. The substrate 8 may be transparent, translucent or opaque to provide support for the formation of the various film layers disposed thereon.

FIG. 3 is a schematic diagram of luminescence imaging of quantum dot particles according to the present embodiment. As shown in FIG. 3a, the circuit control unit 4 can be used for electronic control such as quantum dot light emission and display. The circuit control unit 4 can include: a first substrate 3 enclosed on the lower side of the liquid light emitting layer 2 and related power supplies and circuit systems. Among them, the first substrate 3 can be used to modify the spatial position distribution of quantum dot particles. As shown in FIG. 3 a , there are prefabricated circuit bases 30 in the first substrate 3 , and the circuit control unit 4 can provide electronic signals such as specific voltages for each circuit base 30 . As shown in Fig. 3b, the quantum dot particles 20 have two physical distribution states, the red quantum dots 201, green quantum dots 202 and blue quantum dots 203 in state A are randomly distributed, and the red quantum dots 201, The green quantum dots 202 and the blue quantum dots 203 are uniformly distributed. At this time, the red quantum dots 201 , the green quantum dots 202 and the blue quantum dots 203 are locked by the voltages provided by the respective circuit base points 30 in the first substrate 3 Spatial arrangement position.

Referring to FIG. 1 again, the first substrate 3 includes a first area 31 located inside the optical path 10 and a second area 32 located outside the optical path 10 ; the display device 100 further includes a control circuit (not shown), the control circuit and the circuit base point 30 is electrically connected; when the display device 100 is in the display state, the control circuit controls the circuit base points 30 of the first area 31 and the second area 32 to be powered on; when the display device is in the shooting state, the control circuit controls the circuit base point 30 of the first area 31 to be powered off , and the circuit base point 30 of the second area 32 is energized.

It can be seen from the foregoing description that when the circuit base 30 is not energized, the quantum dot particles 20 are randomly distributed in the liquid emitting layer 2 , and when the circuit base 30 is energized, the quantum dot particles 20 will pass through the first substrate 3 . The voltage provided by each circuit base point 30 is used to lock the corresponding matching spatial arrangement position. Therefore, when the display device 100 is in the display state, the circuit base points 30 of the first region 31 and the second region 32 are both powered on, so that the liquid light-emitting layers 2 facing the first region 31 and the second region 32 have uniformly distributed quantum dot particles 20, thereby realizing the full-screen display of the display device 100; when the display device 100 is in the shooting state, the circuit base point 30 of the first area 31 is powered off, and the circuit base point 30 of the second area 32 is powered on, so that the liquid luminescent layer The quantum dot particles 20 in 2 are all gathered in the liquid emitting layer facing the second region 32, that is, the liquid emitting layer facing the first region has no quantum dot particles 20. Since the first region 31 is located in the optical path 10, the second region 31 is located in the optical path 10. The area 32 is located outside the optical path 10 , so that the quantum dot particles 20 will not block the optical path 10 , thereby improving the light transmittance, thereby improving the photographing performance of the photographing unit 1 .

More preferably, the second area 32 has an annular area surrounding the first area 31 (the width of the annular area can be set according to actual requirements), and a higher density of circuit base points can be arranged in the annular area relative to other areas. When the display device 100 is in the display state, the circuit base points in the annular area with excess density compared with other areas in the first area 31 and the second area 32 are not powered on, so as to achieve the uniformity of the display screen; when the display device 100 is in the shooting state At this time, all circuit base points in the annular region are energized to improve the adsorption force to the quantum dot particles 20 in the first region 31 and ensure that the quantum dot particles 20 in the first region 31 are all adsorbed to the outside of the first region 31 .

The second embodiment of the present application relates to a display device 200. The second embodiment is substantially the same as the first embodiment, except that, as shown in FIG. 4, the first substrate 3 is at least partially located in the optical path 10, and the display device 200 also includes a second substrate 5 and a control circuit (not shown), the second substrate 5 is disposed on the side of the first substrate 3 away from the liquid light emitting layer 2, and the second substrate 5 is located outside the optical path; on the second substrate 5 There are a plurality of circuit base points 50 distributed at intervals. When the display device 200 is in the display state, the control circuit controls the circuit base point 30 of the first substrate 3 to be energized, and the circuit base point 50 of the second substrate 5 is powered off; the display device 200 is in the shooting state , the control circuit controls the circuit base 30 of the first substrate 3 to be powered off, and the circuit base 50 of the second substrate 5 to be powered on.

The display device 200 in this embodiment further includes a glass cover plate (not shown) disposed on the side of the liquid luminescent layer 2 away from the photographing unit 1 , and the orthographic projection area of the first substrate 3 on the glass cover plate and the glass cover plate The regions where they are located are overlapped, and the orthographic projection region of the second substrate 5 on the glass cover plate and the orthographic projection region of the photographing unit 2 on the glass cover plate are arranged at intervals. When the display device 200 is in the display state, the circuit bases 30 of the first substrate 3 are powered on and the circuit bases 50 of the second substrate 5 are powered off, so that the liquid light emitting layer 2 facing the first substrate 3 has uniformly distributed quantum dot particles 20 , so as to realize the full-screen display of the display device 200; when the display device 200 is in the shooting state, the circuit base point 30 of the first substrate 3 is powered off, and the circuit base point 50 of the second substrate 5 is powered on, that is, the shooting unit 1 is facing The liquid light-emitting layer 2 has no quantum dot particles 20, so that the quantum dot particles 20 will not block the optical path 10, thereby improving the light transmittance, thereby improving the shooting performance of the shooting unit 1. In addition, due to the circuit base point of the second substrate 5 50 is powered on, so that even when the display device 200 is in the shooting state, the picture can be displayed normally, thereby improving the user experience.

It is not difficult to find that this embodiment can be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in this embodiment, and are not repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

The third embodiment of the present application relates to a display device 300. The third embodiment is substantially the same as the first embodiment. The main difference is that, as shown in FIG. 5, the display device 300 further includes a quantum dot storage cavity 6 and The quantum dot transmission pipeline 61, the quantum dot storage cavity 6 is communicated with the first light-emitting unit 21 via the quantum dot transmission pipeline 61, and the quantum dot storage cavity 6 is located outside the optical path 10; the display device 300 also includes a control unit (not shown in the figure). ), when the display device 300 is in the display state, the control unit controls the quantum dot particles 20 in the quantum dot storage cavity 6 to flow to the area where the first light-emitting unit 21 is located to form the first light-emitting unit 21; the display device 300 is in the shooting state , the control unit controls the quantum dot particles 20 in the first light-emitting unit 21 to flow to the quantum dot storage cavity 6 .

Specifically, the display device 300 of this embodiment further includes a blocking layer 7 , and the blocking layer 7 is disposed between the first light-emitting unit 21 and the second light-emitting unit 22 and is used to block the first light-emitting unit 21 and the second light-emitting unit 22 . Mutual flow of quantum dot particles in the second light-emitting unit 22 . By arranging the barrier layer 7 , it can be ensured that when the display device 300 is in the photographing state, there is no quantum dot particles 20 in the area above the photographing unit 1 , so as to avoid “the quantum dot particles 20 in the first light emitting unit 21 flowing into the quantum dot storage cavity 6 ” , the quantum dot particles 20 in the second light-emitting unit 22 flow to the area where the first light-emitting unit 21 is located, resulting in that there are still quantum dot particles 20 above the photographing unit 1 to block the incidence of external light, thereby causing the photographing performance of the photographing unit 1 to be poor. good" situation.

More specifically, when the display device 300 is in the display state, the control unit transmits the quantum dot particles 20 in the quantum dot storage cavity 6 to the area where the first light-emitting unit 21 is located, and closes the transmission channel 61 to avoid the first light-emitting unit. The quantum dot particles 20 in the 21 are returned to the quantum dot storage cavity 6, so that the full-screen display of the display device 300 can be realized; when the display device 300 is in the shooting state, the control unit opens the transmission channel 61, and the first light-emitting unit 21 All the quantum dot particles 20 inside are transmitted to the quantum dot storage cavity 6, and the transmission channel 61 is closed again, so that the quantum dot particles 20 in the first light-emitting unit 21 will not block the optical path 10, thereby improving the light transmittance, thereby improving The shooting performance of the shooting unit 1 is improved.

Please refer to FIG. 6 , which is a schematic structural diagram of a display device 300 in another feasible embodiment of the present application. The first light-emitting unit 21 includes a first storage cavity 211 and quantum dot particles 20 that can flow into and out of the first storage cavity 211 , and the second light-emitting unit 22 includes a second storage cavity 221 and can flow into and out of the second storage cavity. The quantum dot particles 20 in the body 221; the display device 300 further includes a control unit (not shown in the figure), when the display device 300 is in the shooting state, the control unit controls the quantum dot particles 20 in the first storage cavity 211 to flow to the second storage Cavity 221.

It can be understood that, through the arrangement of this structure, only two storage cavities are required to realize mutual flow and mutual isolation of the quantum dot particles 20 between the first light emitting unit 21 and the second light emitting unit 22 . Specifically, a transmission pipeline (not shown in the figure) is provided between the first storage cavity 211 and the second storage cavity 221. When the display device 300 is in the display state, the control unit will The quantum dot particles 20 are transmitted to the first storage cavity 211 to form the first light-emitting unit 21, so as to realize the full-screen display of the display device 300; when the display device 300 is in the shooting state, the control unit opens the transmission pipeline, and the first All quantum dot particles 20 in the storage cavity 211 are transmitted to the second storage cavity 221, and the transmission pipeline is closed again, so that the quantum dot particles 20 in the first light-emitting unit 21 will not block the optical path 10, thereby improving the light transmittance , thereby improving the photographing performance of the photographing unit 1 .

It is not difficult to find that this embodiment can be implemented in cooperation with the first embodiment and the second embodiment. The related technical details mentioned in the first embodiment and the second embodiment are still valid in this embodiment, and are not repeated here in order to reduce repetition. Correspondingly, the related technical details mentioned in this embodiment can also be applied to the first embodiment and the second embodiment.

The fourth embodiment of the present application relates to a display device 400. The fourth embodiment is substantially the same as the first embodiment. The main difference is that, as shown in FIG. 7, the display device 400 further includes a refraction unit 8, and the refraction unit 8 Set on the side of the first light-emitting unit 21 close to the photographing unit 1, and the refraction unit 8 is located in the optical path 10; the refraction unit 8 is filled with a transparent liquid filler 80, and the transparent liquid filler 80 is used to improve the refractive index of the refraction unit 8 . With the arrangement of this structure, more light can be made to enter the photographing unit 1 , thereby further improving the photographing performance of the photographing unit 1 .

It should be noted that the display device 400 shown in FIG. 7 further includes a cathode electrode 4001 , an electron layer 4002 , a hole layer 4003 , an anode layer 4004 and a cover plate 4005 arranged in layers, and the liquid light emitting layer 2 is arranged on the electron layer 4002 and the empty layer Between the hole layers 4003 , the first light-emitting unit 21 and the refraction unit 8 are both arranged in the optical path 10 .

It should also be noted that, in this embodiment, a transparent liquid filler storage cavity can also be provided, so that the transparent liquid filler 80 in the refraction unit 8 can migrate to the transparent liquid filler storage cavity, so that the light of the display device 400 can be adjusted. Transmittance to meet different shooting needs. In addition, the transparent liquid filler 80 is a transparent liquid that can increase the light refraction or reflection effect and meet the requirements of light transmittance, such as water, etc. This embodiment does not specifically limit the material of the transparent liquid filler 80 .

It is worth mentioning that in this embodiment, the refractive index of the refraction unit 8 is greater than the refractive index of the functional film layer located on the side of the refraction unit 8 away from the photographing unit 1, because light is refracted by an optically dense medium (ie, the refraction of light in this medium). When it hits the interface of the optically sparser medium (that is, the light has a small refractive index in this medium), it will all be reflected back into the original medium. In order to be greater than the refractive index of the functional film layer, the light incident from the outside is from the optically sparser medium (functional film layer) to the optically dense medium (refractive unit 8), so that the light incident on the shooting unit 1 will not be reflected back. The liquid luminescent layer 2 further increases the light entry efficiency.

Referring to FIG. 8 , the refraction unit 8 includes a first concave lens 81 , a convex lens 82 and a second concave lens 83 arranged in layers, and the first concave lens 81 is disposed adjacent to the photographing unit 1 ; the first concave lens 81 , the convex lens 82 and the second concave lens 83 are all A hollow lens, and the first concave lens 81 , the convex lens 82 and the second concave lens 83 are all filled with transparent liquid fillers. With the arrangement of this structure, more light can be made to enter the photographing unit 1 , thereby further improving the photographing performance of the photographing unit 1 .

It can be understood that this embodiment does not specifically limit the types and numbers of lenses that constitute the refracting unit 8 , and what is shown in FIG. The structure of the refracting unit 8 at different light angles is within the protection scope of this embodiment.

Referring to FIG. 9, the display device further includes a liquid material storage cavity 9, a first liquid material transmission pipe 91, a second liquid material transmission pipe 92 and a third liquid material transmission pipe 93; the first concave lens 81 transmits the liquid material through the first liquid material The pipe 91 is in communication with the liquid substance storage cavity 9 , the convex lens 82 is in communication with the liquid substance storage cavity 9 via the second liquid substance transmission pipe 92 , and the second concave lens 83 is in communication with the liquid substance storage cavity 9 via the third liquid substance transmission pipe 93 ; The display device also includes a control unit 2000, the control unit 2000 is used to control injecting the transparent liquid filler in the liquid substance storage cavity 9 into the refraction unit 8, or extract the transparent liquid filler 80 in the refraction unit 8 to the liquid substance storage Cavity 9.

Specifically, the dotted circle 3000 is the installation position of the photographing unit 1, the dotted box 2000 is the control unit, and the three cavities (the first concave lens 81, the convex lens 82 and the second concave lens 83) support independent injection or extraction of liquid substances , the transparent liquid filler 80 can be transferred to the refraction unit 8 through the three independent transmission paths shown in FIG. and the transfer operation between the liquid substance storage cavity 9. The convex lens 82 and the second concave lens 83 in the refracting unit 8 shown in FIG. 9 are injected with a transparent liquid filler 80. It can be seen that the direction of the light is not refracted when passing through the first concave lens 81, but when passing through the convex lens 82 and the second concave lens 83. , the light is refracted. In this way, the angle of the light incident above the shooting unit 1 can be changed, so that more applications of the under-screen camera technology can be obtained, including but not limited to: improving the clarity of the long-range view, increasing the optical zoom capability, improving the microscopic Distance shooting effect, enlarge the field of view angle, etc. Further, through the above method, it is possible to realize the photographing function of some high-end intelligent terminals without increasing the number and cost of the photographing units 1 .

It should be noted that the control unit 2000 in this embodiment not only controls the transmission operation processing of the transparent liquid filler 80 between the refraction unit 8 and the liquid substance storage cavity 9 , but also controls the quantum dot particles 20 in the liquid light emitting layer 2 . flow: when the display device 400 is in the display state, the control unit 2000 transmits the quantum dot particles 20 in the quantum dot storage cavity 6 to the area where the first light-emitting unit 21 is located, and closes the transmission channel 61 to avoid the first light-emitting unit The quantum dot particles 20 in 21 are returned to the quantum dot storage cavity 6, so that the full-screen display of the display device 400 can be realized; when the display device 400 is in the shooting state, the control unit 2000 opens the transmission channel 61, and the first light-emitting unit All the quantum dot particles 20 in 21 are transmitted to the quantum dot storage cavity 6, and the transmission channel 61 is closed again, so that the quantum dot particles 20 in the first light-emitting unit 21 will not block the optical path 10, thereby improving the light transmittance, and then The photographing performance of the photographing unit 1 is improved.

It is not difficult to find that this embodiment can be implemented in cooperation with the first embodiment, the second embodiment and the third embodiment. The related technical details mentioned in the first embodiment, the second embodiment and the third embodiment are still valid in this embodiment, and are not repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied to the first embodiment, the second embodiment and the third embodiment.

Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present application, and in practical applications, various changes in form and details can be made without departing from the spirit and the spirit of the present application. scope.

Claims

A display device, comprising: a photographing unit, and a liquid luminescent layer;

The photographing unit has an optical path for receiving ambient light outside the display device;

The liquid light-emitting layer includes a first light-emitting unit located in the direction of the light path and a second light-emitting unit located outside the direction of the light path; the first light-emitting unit and the second light-emitting unit each include flowable quantum dot particles ;

When the display device is in a display state, the quantum dot particles of the first light-emitting unit are located in the region of the optical path, and when the display device is in a shooting state, all or part of the quantum dot particles in the first light-emitting unit Move out of the area of the optical path.
The display device according to claim 1, wherein the quantum dot particles include at least a first quantum dot and a second quantum dot, and the first quantum dot and the second quantum dot are used to form a pixel unit; the The display device further includes a first substrate, and the first substrate is disposed on a side of the liquid luminescent layer close to the photographing unit;

The first substrate is provided with a plurality of circuit base points distributed at intervals, and when the circuit base points are energized, the quantum dot particles are adsorbed to the area of the liquid luminescent layer facing the circuit base points, wherein each of the The circuit base dots all adsorb at least one of the first quantum dots and/or at least one of the second quantum dots.
The display device of claim 2, wherein the first substrate comprises a first region located within the region of the optical path and a second region located outside the region of the optical path; the display device further comprises a control circuit , the control circuit is electrically connected to the circuit base point;

When the display device is in a display state, the control circuit controls the circuit base points of the first area and the second area to energize; when the display device is in a shooting state, the control circuit controls the first area. The circuit base is de-energized and the circuit base of the second region is energized.
The display device according to claim 2, wherein the first substrate is at least partially located in the area of the optical path, the display device further comprises a second substrate and a control circuit, the second substrate is disposed on the first substrate a side of a substrate away from the liquid luminescent layer, and the second substrate is located outside the area of the optical path;

The second substrate is provided with a plurality of the circuit base points distributed at intervals. When the display device is in a display state, the control circuit controls the circuit base points of the first substrate to be energized and the circuit of the second substrate to be energized. The base point is powered off; when the display device is in a shooting state, the control circuit controls the circuit base point of the first substrate to be powered off and the circuit base point of the second substrate to be powered on.
The display device according to any one of claims 1 to 4, wherein the display device further comprises a quantum dot storage cavity and a quantum dot transmission pipeline, and the quantum dot storage cavity is connected to the quantum dot transmission pipeline via the quantum dot transmission pipeline. The first light-emitting unit is connected, and the quantum dot storage cavity is located outside the area of the optical path;

The display device further includes a control unit, and when the display device is in a display state, the control unit controls the quantum dot particles in the quantum dot storage cavity to flow to the area where the first light-emitting unit is located, so as to form the A first light-emitting unit; when the display device is in a shooting state, the control unit controls all or part of the quantum dot particles in the first light-emitting unit to flow to the quantum dot storage cavity.
The display device according to claim 5, wherein the display device further comprises a blocking layer, the blocking layer is disposed between the first light-emitting unit and the second light-emitting unit, and is used to block the first light-emitting unit. Mutual flow of quantum dot particles in a light-emitting unit and the second light-emitting unit.
The display device according to any one of claims 1 to 6, wherein the first light-emitting unit comprises a first storage cavity and quantum dot particles that can flow into and out of the first storage cavity, the first storage cavity The two light-emitting units include a second storage cavity and a second storage cavity that can flow into and out of the second storage cavity;

The display device further includes a control unit, and when the display device is in a shooting state, the control unit controls the quantum dot particles in the first storage cavity to flow to the second storage cavity.
The display device according to any one of claims 1 to 7, wherein the display device further comprises a refraction unit, the refraction unit is disposed on a side of the first light emitting unit close to the photographing unit, and the The refraction unit is located in the area of the optical path; the refraction unit is filled with transparent liquid filler, and the transparent liquid filler is used to improve the refractive index of the refraction unit.
The display device according to claim 8, wherein the refraction unit comprises a first concave lens, a convex lens and a second concave lens arranged in layers, and the first concave lens is arranged adjacent to the photographing unit;

The first concave lens, the convex lens and the second concave lens are all hollow lenses, and the first concave lens, the convex lens and the second concave lens are all filled with the transparent liquid filler;

The display device further includes a liquid substance storage cavity, a first liquid substance transmission pipeline, a second liquid substance transmission pipeline and a third liquid substance transmission pipeline;

The first concave lens communicates with the liquid material storage cavity through the first liquid material transmission pipe, the convex lens communicates with the liquid material storage cavity through the second liquid material transmission pipe, and the second liquid material transmission pipe communicates with the liquid material storage cavity. The concave lens is communicated with the liquid substance storage cavity via the third liquid substance transmission pipeline;

The display device further includes a control unit, the control unit is configured to control injecting the transparent liquid filling in the liquid substance storage cavity into the refraction unit, or extracting the transparent liquid filling in the refraction unit to the refraction unit. Described liquid substance storage cavity.
The display device according to any one of claims 1 to 9, wherein when the display device is in a photographing state, the particle density of quantum dots in the first light-emitting unit is smaller than that of quantum dots in the second light-emitting unit particle density.