CN118447764B

CN118447764B - Display module, display screen and electronic equipment

Info

Publication number: CN118447764B
Application number: CN202311258923.2A
Authority: CN
Inventors: 谢朝阳
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-09-26
Filing date: 2023-09-26
Publication date: 2025-02-21
Anticipated expiration: 2043-09-26
Also published as: CN118447764A

Abstract

The application discloses a display module, a display screen and electronic equipment, wherein the display module comprises a driving part, a pixel plate, a plurality of pixel units and a bracket, the driving part and the pixel plate are arranged in a stacked mode, the bracket is connected and supported between the driving part and the pixel plate, the plurality of pixel units are fixedly connected to the bracket, the pixel plate comprises a light blocking surface, a light emitting surface and a plurality of pixel holes, each pixel hole penetrates through the light blocking surface and the light emitting surface and is arranged in an array mode, each pixel unit comprises a prism and a rotating part, the rotating part is connected with the bracket and is electrically connected with the driving part, the prisms of the plurality of pixel units are in one-to-one correspondence with the plurality of pixel holes, white light provided by the backlight module is incident to the prisms through the driving part, the rotating part drives the prisms to rotate, and out dispersed light rays of each prism pass through the pixel holes corresponding to the prisms, and the dispersed light rays passing through the plurality of pixel holes are imaged together on one side of the light emitting surface of the pixel plate.

Description

Display module, display screen and electronic equipment

Technical Field

The present invention relates to the field of display technologies, and in particular, to a display module, a display screen, and an electronic device.

Background

In the prior art, common display screens applied to small intelligent electronic devices are liquid crystal display screens and organic light emitting diode display screens. However, the liquid crystal cell of the liquid crystal display is thick and heavy, and the color purity of the organic light emitting diode display is insufficient, thereby resulting in poor user experience.

Disclosure of Invention

The application provides a display module, a display screen and electronic equipment, which solve the technical problems of thick liquid crystal of a liquid crystal display screen and insufficient color purity of an organic light emitting diode.

The embodiment of the application provides a display module, which is used for a display screen, wherein the display screen comprises a backlight module, the backlight module provides parallel white light for the display module, the display module comprises a driving part, a pixel plate, a plurality of pixel units and a bracket, the driving part and the pixel plate are arranged in a stacked manner along the thickness direction of the display module, the bracket is connected and supported between the driving part and the pixel plate, and the pixel units are fixedly connected with the bracket and are positioned between the driving part and the pixel plate;

The pixel plate comprises a light blocking surface, a light emitting surface and a plurality of pixel holes, the light blocking surface and the light emitting surface are arranged back to back and the light blocking surface faces the pixel unit along the thickness direction of the pixel plate, each pixel hole penetrates through the light blocking surface and the light emitting surface, and the plurality of pixel holes are arranged in an array;

Each pixel unit comprises a prism and a rotating part, the rotating part is connected with the bracket and is electrically connected with the driving part, the prisms are connected with the rotating part, and the prisms of the plurality of pixel units are in one-to-one correspondence with the plurality of pixel holes;

along the thickness direction perpendicular to the display module, the white light provided by the backlight module passes through the driving part to be incident to the prism, the light emitted by the prism is a plurality of light rays with different wavebands after chromatic dispersion, the rotating part drives the prism to rotate, among the plurality of light rays after chromatic dispersion emitted by each prism, the light rays with one waveband pass through the pixel hole corresponding to the prism, and the light rays after chromatic dispersion passing through the plurality of pixel holes are imaged together on one side of the light emitting surface of the pixel plate.

In this embodiment, the dispersion of light is realized after the parallel white light that the backlight unit provided is incident to the prism, and several different wave bands after the dispersion are equipped with several pixel hole pixel board and filter, and light passes through rotation portion and drives the prism and rotate the back, and the light of spectrum can remove along the light blocking face, and rotation portion can control the prism and rotate the angle that needs to the back to guarantee that the light of the colour that needs to permeate can permeate corresponding pixel hole, and every pixel hole can only permeate the light of one wave band, and several prism rotates several pixel hole simultaneously and can permeate the light of several different wave bands (colour), and then forms the display screen (formation of image) at display module's display side. Compared with the prior art, the display module has the advantages of no liquid crystal layer, simple structure, reduced relative weight and volume, no liquid leakage and the like, and has the advantages of thicker liquid crystal layer, liquid leakage and complex liquid crystal manufacturing problems. Compared with the organic light emitting diode display, the pixel unit of the display module does not have the risks of fast aging and screen burning.

In one embodiment, the driving part can control the rotation parts of the pixel units to rotate respectively. The driving part controls the rotating part to independently rotate, so that each prism can be controlled to rotate at different angles without being influenced by other prisms, and the light entering the pixel hole after passing through the prism is ensured to be accurate.

In one embodiment, the distance between every two adjacent pixel holes is less than or equal to 0.2mm. The light passing through the pixel holes is ensured to form continuous images, namely, the naked eyes can not see the pixel holes and the intervals between the pixel holes, and the problem of discontinuous display is avoided. The smaller the interval between the pixel holes is, the denser the pixel units are, the more the number of pixels contained in the picture of the display screen is, the higher the resolution is, the more the displayed colors are, the more complex and continuous the displayed images can be, and meanwhile, the layers of the picture are rich, fine and clear.

In one embodiment, the prism includes an exit surface and an incident surface, the exit surface is connected with the incident surface, an included angle between the exit surface and the incident surface is 60 degrees, the exit surface and the incident surface are symmetrical with each other with respect to the symmetry surface, and an angle of rotation between the exit surface and the incident surface with respect to the symmetry surface is greater than or equal to 0 degree and less than 60 degrees, wherein a center line of the prism in a length direction is located on the symmetry surface, the symmetry surface is parallel to the blocking surface, and an axial direction of the pixel hole is perpendicular to the symmetry surface. In one embodiment, the prism has an equilateral triangle cross section. No matter which angle is turned, the light entering direction and the light exiting direction can be ensured, so that the dispersed light can be accurately incident to the pixel hole and the light blocking surface of the pixel plate. Compared with the symmetry plane, the angle of rotation of the emergent plane and the incident plane is more than or equal to 0 degree and less than 60 degrees, so that each pixel hole can be ensured to pass through light rays.

In one embodiment, the bracket includes a plurality of sub-rods arranged in parallel, opposite ends of the sub-rods are respectively connected with the driving part and the light blocking surface, and the sub-rods and the pixel holes are completely arranged in a staggered manner;

The rotating part comprises a rotating shaft, the axis of the rotating shaft coincides with the central line of the prism in the length direction, the rotating part is fixed on the sub-rod, and the central line of the prism is perpendicular to the sub-rod. The bracket is composed of a plurality of sub-rods, not a plurality of plate-shaped pixel units, has lighter weight and is beneficial to reducing the weight of the display module. And the sub-rods are used for installing the pixel units, so that the pixel units and the pixel holes are aligned conveniently. The distance between every two adjacent sub-rods meets the requirement that every two pixel units have enough rotation gaps and cannot generate redundant gaps, so that redundant space is avoided in the display screen.

In one embodiment, the rotating part comprises a micro-nano motor, and the micro-nano motor has a volume of 0.1mm or less. The micro-nano motor is adopted to drive the prism to rotate, so that the precision of a rotating angle of coldness can be ensured, and the volume of the display module can be saved.

In one embodiment, the driving portion is a semiconductor thin film transistor driving portion, and includes a conductive layer, and a plurality of wires of the conductive layer are connected to and turned on by one to one with a plurality of the rotating portions. The semiconductor thin film transistor is used as a drive, so that the response speed is high, point-to-point response can be realized, control can be performed on each pixel unit, and the response sensitivity of the display module is improved.

The application also provides a display screen, which comprises a backlight module and the display module, wherein the backlight module is positioned at one side of the driving part, which is away from the pixel plate, and the backlight module provides white light to enter the prism through the driving part. The display screen of the embodiment adopts the display module to realize the display function, and has the advantages of quick response, small size and richer color of the display picture.

In one embodiment, the white light is natural light or composite white light. The backlight adopts white light, and the requirement is low. And after the white light passes through the display module to carry out light dispersion, a spectrum formed by arranging light rays with different wavelengths according to the wavelength sequence is obtained, namely, the white light rays are refracted in the prism, the light rays with different wavelengths can be dispersed due to different refractive indexes to form a spectrum arranged according to a certain sequence, so that the light rays with a certain wave band after the dispersion can be controlled through the rotation of the prism to enter the corresponding pixel hole, and the imaging of the display module is further realized.

The application also provides electronic equipment, which comprises a body and the display screen, wherein the display screen is arranged on one side of the body, and the light emitting surface of the pixel plate faces away from the body. The display screen of this embodiment adopts foretell display screen to realize showing the function, can reduce the volume and have stable display effect, and life is longer moreover.

Drawings

In order to more clearly describe the embodiments of the present application or the technical solutions in the background art, the following description will describe the drawings that are required to be used in the embodiments of the present application or the background art.

Fig. 1 is a schematic diagram of a three-dimensional structure of an electronic device according to an embodiment of the present application;

FIG. 2 is an exploded view of the display screen of the electronic device of FIG. 1;

FIG. 3 (a) is a schematic side view of the inside of a part of the structure of the display screen shown in FIG. 2;

FIG. 3 (b) is a schematic side view of the interior of the display module of the display screen of FIG. 3 (a);

FIG. 4 is a top view of a portion of the display module of the display screen of FIG. 3 (b);

FIG. 5 is a schematic view illustrating a light path of a portion of the prisms of the display module shown in FIG. 4 in an initial state;

FIG. 6 is a schematic view illustrating a portion of the prisms of the display module shown in FIG. 5 rotated in a counterclockwise direction by a certain angle;

FIG. 7 is a schematic view showing a light path of a portion of the prisms of the display module of FIG. 6 at different angles of rotation;

FIG. 8 is a schematic view showing a portion of the prisms of the display module shown in FIG. 5 each rotated by a certain angle in a clockwise direction;

Fig. 9 is a schematic view of a portion of prisms of the display module shown in fig. 8 under different rotation angles.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

For ease of description, the following terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of features which are indicated. Thus, a feature defining "a first", "a second", "a third", etc. may explicitly or implicitly include one or more such feature. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, fig. 1 is a schematic perspective view of an electronic device according to an embodiment of the application. The electronic device 1000 includes, but is not limited to, a cell phone, notebook computer, tablet computer, laptop computer, television, wearable device, or vehicle-mounted device, etc. In the embodiment of the present application, the electronic device 1000 is illustrated by taking a mobile phone as an example.

For convenience of description, the width direction of the electronic device 1000 is defined as an X-axis direction, the length direction of the electronic device 1000 is defined as a Y-axis direction, the thickness direction of the electronic device 1000 is defined as a Z-axis direction, and the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other. The terms "top", "bottom", "upper", "lower", "left" and "right" and the like in the present application are used for the description with reference to the orientation shown in fig. 1, and are not intended to be construed as limiting the present application, since the terms "top" toward the positive Y-axis, the "bottom" toward the negative Y-axis, the "upper" toward the positive Z-axis, the "lower" toward the negative Z-axis, the "right" toward the positive X-axis, and the "left" toward the negative X-axis do not necessarily indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation. The X direction is the length direction of the display module in the electronic device 1000, and the Y direction is the width direction of the display module.

The electronic device 1000 includes a body 200 and a display 100, the display 100 is mounted on one side of the body 200, and the body 200 includes a housing 210, a processor, a battery, a circuit board, and other functional devices for implementing functions of a mobile phone. The battery and the display 100 are both electrically connected to the electronic device 1000. The battery is used for supplying power to the electronic device 1000, and the display screen 100 is used for displaying incoming call information, news, weather information and other contents, and synchronizing information such as telephone, short messages, mails, photos, music and the like in the functions of the electronic device 1000.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating an exploded structure of a display screen in the electronic device shown in fig. 1. In this embodiment, the display 100 includes a backlight module 60, a display module 20, and a transparent cover 70. The backlight module 60, the display module 20 and the transparent cover plate 70 are sequentially stacked. The backlight module 60 faces away from the display side of the display module 20, and provides white light for the display module 20, so as to improve the displayable color gamut range, color fidelity and color purity of the display screen 100. The transparent cover plate 70 covers the display side of the display module 20, and the transparent cover plate 70 is used for protecting the display module 20 to realize waterproof, dustproof and wear-proof.

The backlight module 60 may be three kinds of backlight modules including an electroluminescent (Electroluminescent film, EL), a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamps, CCFL) or a light emitting Diode (LIGHT EMITTING Diode, LED) or other light sources capable of generating white light. The display 100 using white light has a lower light source requirement and a higher display color purity. Wherein the white light may include natural light or composite white light. The transparent cover plate 70 may be made of glass, resin or plastic with high transmittance, and has high wear resistance on its outer surface. In this embodiment, the transparent cover plate 70 is a glass plate, and the light source of the backlight module 60 is an LED light bar. The backlight module 60 is a planar uniform lighting device, and the LED light bars as light sources are arranged on one side of the entire backlight module 60 facing the display module 20, so that the light emitted by the backlight module 60 is ensured to be parallel.

Referring to fig. 3 (a), 3 (b) and 4, fig. 3 (a) is a schematic side view of the inside of a part of the structure of the display screen shown in fig. 2, fig. 3 (b) is a schematic side view of the inside of the display module of the display screen shown in fig. 3 (a), and fig. 4 is a schematic top view of the part of the structure of the display module of the display screen shown in fig. 3 (b).

In this embodiment, the display module 20 includes a driving portion 21, a pixel plate 23, a plurality of pixel units 22, a bracket 25, and an edge seal (not shown). The driving portion 21, the bracket 25, and the pixel plate 23 are sequentially stacked along the thickness direction of the display module 20, i.e., the Z-axis direction. The bracket 25 is connected and supported between the driving section 21 and the pixel plate 23, and connects the driving section 21 and the pixel plate 23 while keeping the driving section 21 and the pixel plate 23 at a constant distance. The pixel units 22 are fixedly connected to the bracket 25. The edge sealing is connected with the periphery of the driving part 21 and the periphery of the pixel plate 23, and the plurality of pixel units 22 and the bracket 25 are packaged between the driving part 21 and the pixel plate 23, so that light leakage during light transmission of the plurality of pixel units 22 is avoided. The driving part 21 is stacked and connected with the backlight module 60, and the pixel plate 23 is stacked and connected with the transparent cover plate 70.

In this embodiment, the driving section 21 is a semiconductor thin film transistor (Thin Film Transistor, TFT) drive, which includes a conductive layer 211 and a TFT substrate 212. Specifically, the TFT substrate 212 is provided with a driving circuit and a light-transmitting area, the light-transmitting areas are arranged in a matrix and are alternately arranged with the driving circuit, and the conductive layer 211 is formed on a side of the TFT substrate 212 facing away from the backlight module 60 and is electrically connected with the driving circuit of the TFT substrate 212. It is to be understood that the TFT substrate 212 is a common semiconductor thin film transistor driver, and the specific structure can refer to the conventional TFT driver, which is not described herein. The semiconductor material may be α -si, LTPS, IGZO, etc. commonly used in display screens, and is not limited herein. The conductive layer 211 may be a transparent wiring layer formed of Indium Tin Oxide (ITO), and the conductive layer 211 is used to transmit driving signals (including control signals and power signals) to the pixel unit 22. In this embodiment, the conductive layer 211 is formed of a plurality of indium tin oxide traces, and each pixel unit 22 is electrically connected to one trace. In this embodiment, the TFT circuit is combined with the indium tin oxide wiring driving, so that the pixel unit 22 can be controlled in response to the change of the electric field rapidly, thereby realizing rapid image refreshing of the display 100. This allows the display 100 to have a faster response time, which is advantageous in gaming and dynamic image display, and which reduces image blurring and ghosting, providing a smoother visual experience. It can be understood that the conductive layer 211 is a pixel electrode layer.

Each pixel unit 22 includes a prism and a rotation portion to which the prism is connected. The rotating part drives the prism to rotate. The rotating portion is electrically connected to the conductive layer 211 of the driving portion 21. The prism of this embodiment is a prism, and includes three prism faces and two end faces. Along the Z direction, that is, along the thickness direction of the display module 20, the three prism faces enclose two end faces that are arranged in parallel, and the three prism faces are fixedly connected with the two end faces. The three prism faces are respectively named as a first prism face, a second prism face and a third prism face in a clockwise direction. The end faces include a first end face and a second end face. In this embodiment, the end faces are all equilateral triangles, and it can be understood that the included angle between every two of the three prism faces is 60 degrees. For convenience of description, this embodiment takes three pixel units 22 arranged adjacently on a certain column in the display module 20 as an example, namely, three pixel units 22 are named as a first pixel unit 26, a second pixel unit 27 and a third pixel unit 28. It should be noted that the term "several" means two or more, and the same explanation is given below. The array arrangement of the pixel units 22 allows the display 100 to have a wide viewing range so that the quality of the image is consistent for viewing at different angles. The pixel units are described in detail below taking the first pixel unit 26, the second pixel unit 27, and the third pixel unit 28 as examples.

The pixel plate 23 is a rectangular thin plate, and includes a substrate 231 and a plurality of pixel holes 232 arranged in an array. The substrate 231 may be a glass plate, a light-transmitting plastic plate, or the like. The opacifying layer may be an ink layer or other coating. Specifically, the substrate 231 includes a light blocking surface 233 and a light emitting surface 234, and the light blocking surface 233 and the light emitting surface 234 are disposed opposite to each other along the thickness direction of the pixel board 23. Specifically, a light shielding layer (not shown) is coated on the surface of the pixel plate 23 facing away from the light emitting surface 234, and the light shielding layer in this embodiment may be an ink layer, and the surface on which the light shielding layer is formed is the light blocking surface 233.

In the embodiment, the pixel holes 232 penetrate through the light blocking surface 233 and the light emitting surface 234 of the pixel plate 23, and the plurality of pixel holes 232 are arranged in an array, and the pixel holes 232 are used for passing the light emitted from the pixel units 22. Each pixel hole 232 corresponds to each pixel unit 22 one by one. For example, the pixel hole 232 includes a first pixel hole 2321, a second pixel hole 2322, and a third pixel hole 2323 corresponding to the first pixel unit 26, the second pixel unit 27, and the third pixel unit 28.

The light blocking surface 233 is used for blocking, reflecting or absorbing the light emitted from the pixel unit 22. Specifically, the light blocking surface 233 is disposed on the ink coating, and the pixel hole 232 penetrates through the ink coating. It will be appreciated that the surface of the pixel plate 23 is coated with an ink coating and then perforated to form pixel holes, and the area provided with the ink coating is a blocking area for blocking, reflecting or absorbing the light emitted from the pixel unit 22 and not required to form a display screen.

In one embodiment, the spacing between each two adjacent pixel apertures 232 is less than 0.2mm, and the pixel apertures 232 can ensure that light of multiple wavelength bands passing through the pixel unit 22 passes through, and that light passing through several pixel apertures 232 forms a continuous image. I.e. invisible to the naked eye, without the problem of display discontinuities. And the pixel size can be adjusted according to the requirements of the display screen and the use scene. In practice, the smaller the interval between the pixel holes 232, the denser the pixel units 22, the more pixels the display screen 100 contains, the higher the resolution, the more colors are displayed, the more complex and continuous the displayed images can be, and meanwhile, the richer the layers of the screen are, finer and clearer.

The holder 25 is connected between the side of the driving section 21 on which the conductive layer 211 is provided and the light blocking surface 233 of the pixel plate 23. In this embodiment, the bracket 25 may be a plastic member, and the bracket 25 includes a plurality of sub-rods. The plurality of sub-rods are parallel and are arranged at intervals, and the length direction of the plurality of sub-rods is parallel to the thickness direction of the display module 20. Each sub-rod is connected between the side of the driving part 21 provided with the conductive layer and the light blocking surface of the pixel plate 23, and a pixel unit 22 is fixed on each sub-rod. The bracket 25 is formed by a plurality of sub-rods, not a plurality of plate-shaped pixel units, and has lighter weight, thereby being beneficial to reducing the weight of the display module 20. And the sub-rods are used for installing the pixel units, so that the pixel units and the pixel holes are aligned conveniently. Illustratively, the sub-rods include a first sub-rod 251, a second sub-rod 252, and a third sub-rod 253 corresponding to the first pixel unit 26, the second pixel unit 27, and the third pixel unit 28. The first pixel unit 26, the second pixel unit 27 and the third pixel unit 28 are respectively connected to the first sub-rod 251, the second sub-rod 252 and the third sub-rod 253. It should be noted that the sub-rods and the pixel holes are completely staggered, so as to avoid the sub-rods from being exposed at the display side of the display module. The distance between every two adjacent sub-rods satisfies that every two pixel units 22 have enough rotation gaps and cannot generate redundant gaps, so that redundant space is avoided in the display screen 100, the volume of the electronic equipment is reduced, and light and thin experience is brought to a user.

In the present embodiment, the first pixel unit 26 includes a first prism 261 and a first rotating portion 262. The first prism 261 is connected with the first rotating portion 262. The first rotating portion 262 includes a first micro-nano motor 2621. The first micro-nano motor 2621 includes a first rotation shaft 2621a, and the first micro-nano motor 2621 drives the first rotation shaft 2621a to rotate. The first prism 261 includes a first prism face 2611, a second prism face 2612, a third prism face 2613, a first end face 2614, and a second end face 2615. The first prism surface 2611, the second prism surface 2612 and the third prism surface 2613 are sequentially connected clockwise to form a triangular prism, and are fixedly connected with the first end surface 2614 and the second end surface 2615, the first end surface 2614 and the second end surface 2615 are relatively parallel to each other along two ends of the extending direction of the prism 261, and the first end surface 2614 and the second end surface 2615 are both equilateral triangles. It can be explained that the triangular prism sections surrounded by the first prism face 2611, the second prism face 2612 and the third prism face 2613 are equilateral triangles, and the included angle between the first prism face 2611, the second prism face 2612 and the third prism face 2613 is 60 degrees.

The second pixel unit 27 includes a second prism 271 and a second rotating part 272. The second prism 271 is connected with the second rotating unit 272. The second rotating portion 272 includes a second micro-nano motor 2721, the second micro-nano motor 2721 includes a second rotating shaft 2721a, and the second micro-nano motor 2721 drives the second rotating shaft 2721a to rotate. The second prism 271 includes a first prism face 2711, a second prism face 2712, a third prism face 2713, a first end face 2714 and a second end face 2715, where the first prism face 2711, the second prism face 2712 and the third prism face 2713 are sequentially connected clockwise to form a triangular prism and fixedly connected with the first end face 2714 and the second end face 2715, the first end face 2714 and the second end face 2715 are relatively parallel arranged along two ends of the extending direction of the second prism 271, the first end face 2714 and the second end face 2715 are both equilateral triangles, which can be explained that the triangular prism section formed by the first prism face 2711, the second prism face 2712 and the third prism face 2713 is an equilateral triangle, and an included angle between two of the first prism face 2711, the second prism face 2712 and the third prism face 2713 is 60 degrees.

The third pixel unit 28 includes a third prism 281 and a third rotation part 282. The third prism 281 is connected to the third rotating portion 282. The third rotating portion 282 includes a third micro-nano motor 2821, the third micro-nano motor 2821 includes a third rotating shaft 2821a and the third micro-nano motor 2821 drives the third rotating shaft 2821a to rotate. The third prism 281 includes a first prism face 2811, a second prism face 2812, a third prism face 2813, a first end face 2814, and a second end face 2815. The first prism face 2811, the second prism face 2812 and the third prism face 2813 are sequentially connected clockwise to form a triangular prism, and are fixedly connected with the first end face 2814 and the second end face 2815, the first end face 2814 and the second end face 2815 are relatively parallel to each other along two ends of the extending direction of the third prism 281, the first end face 2814 and the second end face 2815 are equilateral triangles, and it can be explained that the triangular prism sections formed by the first prism face 2811, the second prism face 2812 and the third prism face 2813 in a surrounding mode are equilateral triangles, and an included angle between every two of the first prism face 2811, the second prism face 2812 and the third prism face 2813 is 60 degrees.

The first micro-nano motor 2621, the second micro-nano motor 2721 and the third micro-nano motor 2821 have the same structure, the sizes of the first micro-nano motor 2621, the second micro-nano motor 2721 and the third micro-nano motor 2821 are cubes smaller than 0.1mm, and the first micro-nano motor, the second micro-nano motor, the third micro-nano motor and the third micro-nano motor can be solid optical nano motors, optical drive motors, ultrasonic drive micro-nano motors and the like, and can also be traditional electromagnetic coils. The first prism 261, the second prism 271, and the third prism 281 are micro prisms. The axis of the rotating shaft coincides with the central line of the prism.

The first pixel unit 26, the second pixel unit 27 and the third pixel unit 28 are fixedly connected to the first sub-rod 251, the second sub-rod 252 and the third sub-rod 253, respectively. Specifically, the first rotating portion 262 is connected to the first sub-lever 251 and is located at one side of the first sub-lever 251, and in this embodiment, the first rotating portion 262 is located at one side of the first sub-lever 251 perpendicular to the pixel board 23. The second rotating portion 272 is connected to the second sub-rod 252, and is located at one side of the second sub-rod 252, where the second rotating portion 272 is located at one side of the second sub-rod 252 perpendicular to the pixel board 23. The third rotating portion 282 is connected to the third sub-rod 253 and is located at one side of the third sub-rod 253, and in this embodiment, the third rotating portion 282 is located at one side of the third sub-rod 253 perpendicular to the pixel board 23.

The first pixel unit 26, the second pixel unit 27, and the third pixel unit 28 are disposed corresponding to the first pixel hole 2321, the second pixel hole 2322, and the third pixel hole 2323, respectively, and it can be interpreted that the first pixel hole 2321 is used for passing the light passing through the first prism 261, the second pixel hole 2322 is used for passing the light passing through the second prism 271, and the third pixel hole 2323 is used for passing the light passing through the third prism 281.

The first prism 261 is mounted on a first rotation shaft 2621a of the first rotation portion 262. The length extension direction of the first rotation shaft 2621a coincides with the length extension direction of the first prism 261. The first prism 261 and the first rotating portion 262 are located at the same side of the first sub-lever 251. Specifically, the first rotating portion 262 is fixedly connected to the first sub-lever 251 on the side facing the second end surface 2615. The extending direction of the first rotation shaft 2621a and the first prism 261 is perpendicular to the extending direction of the first sub-rod 251. The first rotation shaft 2621a penetrates through the first end surface 2614 of the first prism 261 and extends to the second end surface 2615, so as to ensure the rotation stability of the first prism 261. The first micro-nano motor 2621 drives the first rotating shaft 2621 to rotate, and further drives the first prism 261 connected to the first rotating shaft 2621 to rotate.

The second prism 271 is mounted on the second rotation shaft 2721a of the second rotation portion 272. The extending direction of the second rotation shaft 2721a coincides with the length extending direction of the second prism 271. The second prism 271 and the second rotating part 272 are located at the same side of the second sub-lever 252. Specifically, the second rotating portion 272 is fixedly connected to the second sub-rod 252 on the side facing the second end surface 2715. The extending direction of the second rotation shaft 2721a and the second prism 271 is perpendicular to the extending direction of the second sub-rod 252. The second rotation shaft 2721a penetrates through the first end surface 2714 of the second prism 271 and extends to the second end surface 2715, so that rotation stability of the second prism 271 is guaranteed. The second micro-nano motor 2721 drives the second rotating shaft 2721a to rotate, and further drives the second prism 271 connected to the second rotating shaft 2721a to rotate.

The third prism 281 is mounted to the third rotation shaft 2821a of the third rotation portion 282. The length extension direction of the third rotation shaft 2821a coincides with the length extension direction of the third prism 281. The third prism 281 and the third rotating part 282 are located at the same side of the third sub-lever 253. Specifically, the third rotating portion 282 is fixedly connected to the third sub-rod 253 facing the second end face 2815. The extending direction of the third rotation shaft 2821a and the third prism 281 is perpendicular to the extending direction of the third sub-rod 253. The third rotation shaft 2821a extends through the first end face 2814 of the third prism 281 and extends to the second end face 2815, so as to ensure the rotation stability of the third prism 281. The third micro-nano motor 2821 drives the third rotating shaft 2821a to rotate, and further drives the third prism 281 connected to the third rotating shaft 2821a to rotate. It is understood that the first prism 261, the second prism 271 and the third prism 281 can maintain independent rotation angles without being disturbed by each other.

The first pixel unit 26, the second pixel unit 27 and the third pixel unit 28 are positioned on the same side as the first sub-bar 251, the second sub-bar 252 and the third sub-bar 253. Along the length direction of the prisms, the central axes of the first, second and third prisms 261, 271 and 281 are parallel to each other, and the first, second and third rotation axes 2621a, 2721a and 2821a are parallel to each other.

The first rotating portion 262, the second rotating portion 272 and the third rotating portion 282 are all electrically connected to the conductive layer 211. The first rotating portion 262, the second rotating portion 272 and the third rotating portion 282 are respectively connected with an indium tin oxide wire.

In this embodiment, the driving unit 21 is configured to drive the first rotating unit 262, the second rotating unit 272, and the third rotating unit 282 to rotate. The first rotation part 262, the second rotation part 272 and the third rotation part 282 receive a driving command, and then drive the first prism 261, the second prism 271 and the third prism 281 to rotate, wherein the driving command comprises signals of rotation and a required rotation angle. The driving unit 21 may drive the first rotation unit 262, the second rotation unit 272, and the third rotation unit 282 to rotate at different angles at the same time according to actual needs, that is, the angles at which the first rotation unit 262, the second rotation unit 272, and the third rotation unit 282 rotate may be different or the same.

The display screen 100 may further include a chip electrically connected to the driving part 21. The chip (with control module or identification module) can obtain user input command and generate control signal according to the user input command, and the chip can also transmit control signal to the rotating portion of each pixel unit 22 to drive the prism to rotate for display. That is, the driving part 21 of the pixel units 22 is controlled by the chip to drive the rotating part of each pixel unit 22, so that each prism can rotate, and the light emitted from the emitting surface is ensured to be accurately filtered and then emitted through the pixel hole 232. The angle of rotation can be flexibly controlled by the driving part 21 according to actual needs, and the driving part 21 drives the corresponding rotating part to flexibly rotate at moment and drive the corresponding prism to rotate at moment, so that the problem of low dynamic response speed is avoided, and the watching experience of a user can be improved. For example, taking the first prism 261 as an illustration of the position and rotation state of the prism, the length direction of the first prism 261 is perpendicular to the thickness direction of the display module 20, and the first prism surface 2611, the second prism surface 2612 and the third prism surface 2613 form an included angle with the light blocking surface 233 of the pixel plate 23, at least one of the first prism surface 2611, the second prism surface 2612 and the third prism surface 2613 faces the pixel plate 23, so that after the light passing through the first prism 261 is dispersed, the required light must pass through the corresponding pixel hole 232, thereby ensuring the continuity and definition of the display screen. Whether the first prism 261 rotates counterclockwise or clockwise as compared with the pixel plate 23, only one of the first prism face 2611, the second prism face 2612 and the third prism face 2613 serves as the light incident face of the light, and the other prism face serves as the light emergent face of the light.

In this embodiment, when the display 100 is in operation, the white light rays 61 emitted from the backlight module 60 are parallel rays, which means that the parallel rays are equidistant between the rays extending in the same direction, and form a line in the same direction without intersecting. The parallelism of the present embodiment may allow for tolerances in the exit or propagation that are offset, which fall within the parallel ray range, without affecting the final imaging of the ray. After the white light ray 61 is subjected to light dispersion by the display module 20, a spectrum formed by arranging light rays with different wavelengths according to the wavelength order is obtained, namely, the white light ray 61 is refracted in the prism, the light rays with different wavelengths are dispersed due to different refractive indexes to form a spectrum arranged according to a certain order, and the white light ray 61 is dispersed by the prism, so that the light ray order of the formed spectrum is not changed no matter how the prism rotates. The dispersed light rays constituting the spectrum are primary color light, and sequentially include red light ray 62, orange light ray 63, yellow light ray 64, green light ray 65, blue light ray 66, cyan light ray 67, and violet light ray 68. Wherein, the refractive index of red light is minimum, the wavelength is maximum, the refractive index of purple light is maximum, and the wavelength is minimum. A pixel aperture 232 in the pixel plate 23 passes light of one wavelength. The light rays of several different wavebands passing through the pixel plate 23 form a display screen. Chromatic dispersion refers to the phenomenon that the propagation speeds of light rays with different wavelengths in a medium are different, so that the refraction angles are different. After passing through the prism, the white light is refracted according to the refraction law of the light, so that a continuous spectrum is formed.

The parallel white light emitted by the backlight module 60 passes through the light-transmitting area of the driving part 21 and enters the prism of the pixel unit 22, the white light after passing through the prism is dispersed and then exits through the light-emitting surface 234, the light with one color after dispersion passes through the pixel holes 232 corresponding to the prism, the light with a plurality of dispersions passing through the plurality of pixel units 22 respectively passes through the plurality of pixel holes 232 of the pixel plate 23, the light with a plurality of dispersions presents a plurality of colors on one side of the light-emitting surface 234 to form a picture (imaging) to be displayed, and at the moment, the color of the light with the adjacent prism emitting the pixel plate 23, such as the color of the adjacent light is similar, can be controlled by adjusting the rotation angle of the prism. The color synthesis of the plurality of dispersed light rays on one side of the light emitting surface 234 can increase the range of the color gamut, so that the color of the display picture is richer, that is, the plurality of dispersed light rays can directly form a picture after passing through the pixel board 23, or can form a picture after synthesizing the color (the size and the distance of the pixel hole 232 are small enough, and two light rays with different colors under the eyes can be overlapped to generate light rays with other colors, such as parallel red light and blue light can be purple under the condition of being seen by naked eyes, and of course, the light rays with different wave bands can be synthesized simultaneously). It should be noted that the purpose of the rotation portion to control the rotation of the prism is to ensure that only one wavelength band (color) of light after being dispersed can pass through the pixel hole corresponding to the light. The side of the light emitting surface 234 of the pixel plate 23, that is, the display side of the display screen, the human eyes cannot see the pixel holes 232 in a natural state, that is, the human eyes cannot see the internal structure of the display module 20 on the side of the pixel plate 23 facing away from the backlight module 60.

The array arrangement corresponding to the pixel units 22 and the pixel holes 232 enables the display screen 100 to have a wider viewing angle, so that light can be visible on one side of the transparent cover plate 70 after being uniformly imaged through the pixel plate 23 at different angles, thereby realizing a picture with a wider viewing angle range for human eyes. This means that the brightness and color of the picture remain consistent even when viewed from different angles. This makes the display 100 very suitable for use in large conference rooms, exhibitions, public places, etc. where multiple people are required to view.

Referring to fig. 5, fig. 5 is a schematic view illustrating a light path of a portion of prisms in the display module shown in fig. 4 in an initial state.

The display module 20 has an initial state, and may also be referred to as the pixel unit has an initial state. The initial state is that the first prism face and the second prism face of the prism are symmetrical with respect to a symmetry plane O-O, wherein the symmetry plane O-O passes through a center line (an axis of a rotating shaft of the rotating portion) of the prism in a length direction, and the symmetry plane O-O is parallel to the light emitting surface 234 and the light blocking surface of the pixel plate 23 and is perpendicular to an axial direction of the pixel hole 232. When the prism is in the initial state, the first prism face is 60 degrees with the light blocking face 233 of the pixel plate 23, the second prism face is 60 degrees with the light blocking face 233 of the pixel plate 23, and the third prism face is perpendicular to the symmetry plane O-O. The first prism face is a light incident face, the first prism face faces the driving portion 21, the second prism face is an emitting face, the two prism faces the pixel plate 23, and the second prism face corresponds to one pixel hole 232 of the pixel plate 23.

The prism can rotate anticlockwise or clockwise relative to the symmetry plane O-O in an initial state, and the anticlockwise or clockwise rotation angle relative to the symmetry plane O-O can be any angle within the range of 0-60 degrees, and it is noted that the rotation angle does not include 60 degrees, namely the sum of angles at which the prism can rotate freely is smaller than 120 degrees. Each prism can rotate at different angles according to actual needs. It should be noted that, the initial state of the display module 20 is defined to better describe the dynamic change of the prism in the display process, and the initial state may be a state after the display screen is powered off (closed), or an initial state when the display screen is powered on (powered on), and when the display screen works, if a pure-color picture is displayed, the prism of the display module 20 returns to the initial state.

Specifically, when the first prism 261, the second prism 271, and the third prism 281 are in the initial state, the first prism faces of the first prism 261, the second prism 271, and the third prism 281 are incident surfaces, the second prism faces of the first prism 261, the second prism 271, and the third prism 281 are exit surfaces, the first prism faces of the first prism 261, the second prism 271, and the third prism 281 face the driving unit 21, the second prism faces of the first prism 261, the second prism 271, and the third prism 281 face the pixel plate 23, and the second prism faces correspond to one pixel hole 232 of the pixel plate 23. After the white light ray 61 is refracted by the first prism 261, the second prism 271 and the third prism 281, light emitted from the light emitting surfaces of the first prism 261, the second prism 271 and the third prism 281 is emitted by dispersion of light according to the principle of dispersion of light. The light generated by the dispersion of white light is embodied in the form of a spectrum such as red light 62, orange light 63, yellow light 64, green light 65, blue light 66, cyan light 67 and violet light 68, which are arranged in this order. In the present embodiment, the green light ray 65 emitted from the emitting surfaces of the first prism 261, the second prism 271 and the third prism 281 passes through the corresponding first pixel hole 2321, the second pixel hole 2322 and the third pixel hole 2323, and the rest of the red light ray 62, the orange light ray 63, the yellow light ray 64, the blue light ray 66, the cyan light ray 67 and the violet light ray 68 are incident on the light shielding layer and blocked on the light blocking surface 233 side.

It can be explained that only one wavelength of light emitted by each prism passes through the corresponding pixel hole 232, and the colors of the light emitted by the plurality of prisms are different. The light passing through the pixel holes 232 forms a picture on the transparent cover plate 70 side of the display screen 100, and other light not passing through the pixel holes 232 is blocked on the light blocking surface 233 of the pixel plate 23.

Referring to fig. 6 and 7, fig. 6 is a schematic view illustrating that the prisms in the display module shown in fig. 5 are rotated by a certain angle in a counterclockwise direction, and fig. 7 is a schematic view illustrating the light paths of the prisms in the display module shown in fig. 6 under different rotation angles.

The display module 20 receives the display signal of the picture conversion, starts the driving part 21 and the backlight module 60, and the driving part 21 drives the prism to rotate, so that the light passing through the pixel plate 23 is changed, and a display picture is formed.

The display module 20 rotates based on the initial state, that is, the first prism 261, the second prism 271 and the third prism 281 rotate relative to the symmetry plane O-O. In this embodiment, the counterclockwise rotation is taken as an example, and the angles of rotation of the first prism 261, the second prism 271, and the third prism 281 may be the same or different. Illustratively, the angle of rotation of the first prism 261 is 0 degrees, i.e., the first prism 261 remains in an initial state. The second prism 271 is rotated counterclockwise with respect to the symmetry plane O-O by an angle α, which may be 10 degrees or 20 degrees. The third prism 281 is rotated counterclockwise by an angle β with respect to the symmetry plane O-O, which may be 30 degrees or 40 degrees.

In a possible embodiment, after passing through the driving portion 21, the white light ray 61 emitted from the backlight module 60 enters the pixel unit 22, and the white light ray 61 is incident on the first prism surface 2611 of the first prism 261, refracted in the first prism 261, and then emitted through the second prism surface 2612 of the first prism 261 to form a spectrum. Light of one wavelength in the spectrum passes through the first pixel hole 2321 corresponding to the first prism 261 to one side of the transparent cover plate 70 of the display screen 100. Illustratively, the green light ray 65 emitted through the first prism 261 passes through the first pixel hole 2321 of the pixel plate 23. The white light ray 61 enters the first prism face 2711 of the second prism 271, is refracted in the second prism 271, and then exits through the second prism face 2712 of the second prism 271 to form a spectrum. Light of one wavelength in the spectrum passes through the second pixel hole 2322 corresponding to the second prism 271 to one side of the transparent cover plate 70 of the display screen 100. Illustratively, the blue light 66 emitted through the second prism 271 passes through the second pixel hole 2322 of the pixel plate 23.

The white light ray 61 enters the first prism surface 2811 of the third prism 281, is refracted in the third prism 281, and then exits through the second prism surface 2812 of the third prism 281 to form a spectrum. Light of one wavelength in the spectrum passes through the third pixel hole 2323 corresponding to the third prism 281 to one side of the transparent cover plate 70 of the display screen 100. Illustratively, the cyan light 67 emitted through the third prism 281 passes through the third pixel hole 2323 of the pixel plate 23.

The light rays emitted from the pixel units 22 through the pixel plate 23 form a display screen on the light emitting surface 234 of the pixel plate 23, and are displayed on the transparent cover plate 70 side of the display screen 100. The pictures can be static pictures or dynamic videos.

Referring to fig. 8 and 9, fig. 8 is a schematic view illustrating that the prisms in the display module shown in fig. 5 are each rotated at a certain angle in a clockwise direction, and fig. 9 is a schematic view illustrating the light paths of the prisms in the display module shown in fig. 8 at different angles.

The clockwise rotation is similar to the counterclockwise rotation, and the display module 20 rotates based on the initial state, i.e. the first prism 261, the second prism 271 and the third prism 281 rotate relative to the symmetry plane O-O. In this embodiment, the first prism 261, the second prism 271 and the third prism 281 may be rotated at the same or different angles, for example, by clockwise rotation. Illustratively, the angle of rotation of the first prism 261 is 0 degrees, i.e., the first prism 261 remains in an initial state. The second prism 271 is rotated clockwise with respect to the symmetry plane O-O by a gamma angle, which may be 10 degrees or 20 degrees. The third prism 281 is rotated clockwise with respect to the symmetry plane O-O by a delta angle, which may be 30 degrees or 40 degrees.

In a possible embodiment, the white light ray 61 emitted from the backlight module 60 passes through the driving portion 21 and enters the pixel unit 22, and the white light ray 61 is incident on the first prism surface 2611 of the first prism 261, refracted in the first prism 261, and then emitted through the second prism surface 2612 of the first prism 261 to form a spectrum. Light of one wavelength in the spectrum passes through the first pixel hole 2321 corresponding to the first prism 261 to one side of the transparent cover plate 70 of the display screen 100. Illustratively, the green light ray 65 emitted through the first prism 261 passes through the first pixel hole 2321 of the pixel plate 23.

The white light ray 61 enters the first prism face 2711 of the second prism 271, is refracted in the second prism 271, and then exits through the second prism face 2712 of the second prism 271 to form a spectrum. Light of one wavelength in the spectrum passes through the second pixel hole 2322 corresponding to the second prism 271 to one side of the transparent cover plate 70 of the display screen 100. Illustratively, the yellow light 64 emitted through the second prism 271 passes through the second pixel hole 2322 of the pixel plate 23.

The white light ray 61 enters the first prism surface 2811 of the third prism 281, is refracted in the third prism 281, and then exits through the second prism surface 2812 of the third prism 281 to form a spectrum. Illustratively, light of one wavelength in the spectrum passes through the third pixel hole 2323 corresponding to the third prism 281 to one side of the transparent cover plate 70 of the display screen 100. Illustratively, the orange light 63 emitted through the third prism 281 passes through the third pixel hole 2323 of the pixel plate 23.

In one possible embodiment, the first prism 261, the second prism 271 and the third prism 281 can rotate clockwise or counterclockwise relative to the initial symmetry plane O-O respectively, and the angles can be different or the same according to the practical requirements. Specifically, the red light 62, the orange light 63, the yellow light 64, the green light 65, the blue light 66, the cyan light 67, and the violet light 68 obtained after dispersion from the pixel unit 22 correspond to a specific counterclockwise rotation angle range or a specific clockwise rotation angle range, that is, the light passing through the pixel hole 232 does not change within a specific counterclockwise rotation angle range or a specific clockwise rotation angle range, which is not limited in this embodiment.

The display module 20 of this embodiment adopts a prism to realize the dispersion of light, the obtained light with different wavebands is filtered by the pixel plate 23 provided with the plurality of pixel holes 232, each pixel hole 232 can only transmit the light with one waveband, the plurality of pixel holes 232 can transmit the light with the plurality of wavebands (colors) to form a display picture, and the colors of the light with the plurality of pixel holes can be the same, namely, a pure-color picture can be displayed. Compared with the prior art, which has the problems of thicker liquid crystal layer, liquid leakage and complicated liquid crystal manufacture, the display module 20 of the application has the advantages of simple structure of the liquid crystal layer, smaller weight and volume, no liquid leakage and the like. Compared with the organic light emitting diode display, the pixel unit 22 of the display module 20 of the present application has no risk of aging fast and burning. In addition, the pixel units 22 of the display module 20 are arranged in an array, and are driven by TFTs, so that the dynamic response speed is relatively high.

Further, the display screen 100 of the present application adopts natural light (white light) as backlight, and the light after being dispersed by the prism is light with several different wavebands, and the light with different wavebands can be directly imaged after passing through the pixel board 23, instead of synthesizing other color light by the prism for re-imaging. The dispersed light is filtered through the pixel holes 232, and the light with different wave bands can be synthesized into light with other colors after passing through the pixel plate 23, and the color gamut is increased instead of the synthesized imaging of red, green and blue, so that the color of the display picture is richer.

The above embodiments are only some embodiments of the present application, and the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are covered by the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. The display module is used for a display screen and comprises a backlight module, wherein the backlight module provides parallel white light for the display module, and the display module is characterized by comprising a driving part, a pixel plate, a plurality of pixel units and a bracket, wherein the driving part and the pixel plate are arranged in a stacked manner along the thickness direction of the display module, the bracket is connected with and supported between the driving part and the pixel plate, and the pixel units are positioned between the driving part and the pixel plate;

Each pixel unit comprises a prism and a rotating part, the rotating part is electrically connected with the driving part, the bracket comprises a plurality of sub-rods which are arranged in parallel, the opposite ends of the sub-rods are respectively connected with the driving part and the light blocking surface, and the sub-rods and the pixel holes are arranged in a complete dislocation mode;

The rotating part comprises a rotating shaft, the prisms are connected with the rotating shaft, the axis of the rotating shaft coincides with the central line of the prisms in the length direction, and the rotating part is fixed on the sub-rod, and the central line of the prisms is perpendicular to the sub-rod;

Along the thickness direction perpendicular to the display module assembly, the white light provided by each backlight module assembly passes through the driving part and is incident to the prism, the rotating part drives the prism to rotate, and the light rays with one wave band pass through the pixel holes corresponding to the prism in the dispersed light rays with different wave bands emitted by the prism, and the dispersed light rays passing through the pixel holes are imaged on one side of the light emitting surface of the pixel plate.

2. The display module assembly of claim 1, wherein the driving portion is capable of controlling the rotation portions of the plurality of pixel units to rotate respectively.

3. The display module of claim 1, wherein a distance between each two adjacent pixel holes is 0.2mm or less.

4. The display module of claim 1, wherein the prism includes an exit surface and an entrance surface, the exit surface and the entrance surface are connected, an included angle between the exit surface and the entrance surface is 60 degrees, the exit surface and the entrance surface are symmetrical with respect to a symmetry plane passing through a center line of the prism in a length direction, and an angle of rotation of the exit surface and the entrance surface with respect to the symmetry plane is 0 degrees or more and less than 60 degrees, wherein the symmetry plane is parallel to the light blocking surface and an axial direction of the pixel hole is perpendicular to the symmetry plane.

5. The display module of claim 4, wherein the prism has an equilateral triangle cross section.

6. The display module assembly of any one of claims 1-5, wherein the rotating portion includes a micro-nano motor having a volume of 0.1mm or less.

7. The display module according to any one of claims 1 to 5, wherein the driving part is a semiconductor thin film transistor driving part, and the semiconductor thin film transistor driving part comprises a conductive layer, and a plurality of wires of the conductive layer are connected and conducted with a plurality of the rotating parts in a one-to-one manner.

8. A display screen comprising a backlight module and a display module according to any one of claims 1-7, wherein the backlight module is located at a side of the driving portion facing away from the pixel plate, and the backlight module provides white light to be incident to the prism through the driving portion.

9. The display screen of claim 8, wherein the white light is natural light or composite white light.

10. An electronic device, comprising a body and the display screen according to claim 8 or 9, wherein the display screen is mounted on one side of the body, and the light emitting surface of the pixel board faces away from the body.