CN116068773B - Head-mounted display device and preparation method thereof - Google Patents

Abstract

The invention belongs to the technical field of head-mounted display, and particularly relates to a head-mounted display device and a preparation method of the head-mounted display device. The head-mounted display device includes: the electronic paper display screen is arranged opposite to the lens assembly, the light source is adjacent to the lens assembly and projects light towards the electronic paper display screen, and the electronic paper display screen reflects the light back to the lens assembly. The invention can reduce the power consumption of the head-mounted display device, make the displayed image clearer, and the burden of eyes is smaller, and the eyes of the user are not easy to feel tired in the use process, thus improving the use comfort.

Description

Head-mounted display device and preparation method thereof

Technical Field

The invention belongs to the technical field of head-mounted display, and particularly relates to a head-mounted display device and a preparation method of the head-mounted display device.

Background

Currently, the head-mounted display device transmits optical signals to eyes through various head displays, and can achieve different effects such as virtual reality, augmented reality, mixed reality and the like. The application fields of the head-mounted glasses type display device are mostly VR (VirtualRealit) glasses, AR (AugmentedReality) glasses and the like.

However, the screens used in these head-mounted display devices are backlit LCD (Laser CladdingDeposition), self-luminous OLED (organic light-Emitting Diode) screens or micro led (light-Emitting Diode) screens, which have high power consumption and may cause eye strain damage due to high-speed flickering.

Disclosure of Invention

An object of the embodiments of the present application is to provide a head-mounted display device, which aims to solve the problem of how to reduce the power consumption of the head-mounted display device and improve the eye comfort of a user.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows:

in a first aspect, there is provided a head mounted display device comprising: the electronic paper display screen is arranged opposite to the lens assembly, the light source is adjacent to the lens assembly and projects light towards the electronic paper display screen, and the electronic paper display screen reflects the light back to the lens assembly.

In some embodiments, the light source includes a plurality of beads, each of the beads being arranged in sequence along a circumferential direction of the lens assembly.

In some embodiments, the electronic paper display screen includes a thin film layer, an electronic ink layer configured to display a predetermined content, an array layer configured to control the electronic ink layer, and a substrate layer, where the substrate layer, the array layer, the electronic ink layer, and the thin film layer are sequentially stacked, and the electronic paper display screen further includes a driving structure configured to drive the array layer, and a common electrode layer is further disposed on a surface of the thin film layer facing the substrate layer.

In some embodiments, the array layer includes a substrate, a thin film transistor, a first connection line and a second connection line, where the thin film transistor, the first connection line and the second connection line are all connected to the substrate, and the thin film transistor is arranged on the substrate in an array manner and each of the thin film transistors is arranged at intervals; any two adjacent thin film transistors are connected through a first connecting wire along a first direction; and along a second direction, any two adjacent thin film transistors are connected through a second connecting line, and the first direction is orthogonal to the second direction.

In some embodiments, the substrate is provided with a hollowed-out hole; the hollow holes are arranged between any two adjacent first connecting lines along the first direction, or the hollow holes are arranged between any two adjacent second connecting lines along the second direction.

In some embodiments, the substrate includes a plurality of island regions and a plurality of extension regions, and each of the thin film transistors is disposed in each of the island regions; any two adjacent island regions are connected along a first direction through one telescopic region, and the corresponding first connecting lines are arranged in the corresponding telescopic regions; any two adjacent island regions are also connected along a second direction through one telescopic region, and the corresponding second connecting lines are arranged in the corresponding telescopic regions; the hollowed-out holes are positioned between two adjacent telescopic areas along the first direction or the second direction.

In some embodiments, the first connection line is disposed obliquely to the first direction, the second connection line is disposed obliquely to the second direction, and the first connection line is disposed non-parallel to the second connection line.

In some embodiments, the array layer further includes a reflective layer, where the reflective layer is located on a surface of the electronic ink layer facing the substrate, and a position of the reflective layer corresponding to each of the thin film transistors is provided with an avoidance hole, or the substrate is provided with a directional diffusion layer.

In some embodiments, the display surface of the electronic paper display screen is a plane, a curved surface, or a concave curved surface.

In a second aspect, a method for manufacturing a head-mounted display device is provided, for manufacturing the head-mounted display device, the method for manufacturing the head-mounted display device including the steps of:

preparing an electronic paper display screen to be formed, a light source, a lens assembly, a forming die, an air extracting device and a heating device, wherein a forming cavity with an opening is formed in the forming die, an air extracting hole communicated with an external space is formed in the bottom of the forming cavity, and the substrate layer is made of thermoplastic materials;

placing the electronic paper display screen to be formed in the opening;

the heating device heats the forming die to heat the electronic paper display screen to be formed to a preset temperature;

the air extraction end of the air extraction device is communicated with the air extraction hole and extracts air in the forming cavity so that the electronic paper display screen to be formed is recessed and bent in the forming cavity under the action of vacuum negative pressure and is formed into a preset shape;

and fixing the electronic paper display screen, installing and positioning the lens assembly relative to the electronic paper display screen, and installing the light source on the side surface of the lens assembly.

The beneficial effects of this application lie in: the head-mounted display device comprises a light source, a lens assembly and an electronic paper display screen arranged opposite to the lens assembly. Because the electronic paper display screen is used as a means for displaying images, and the electronic paper display screen has the characteristics of low power consumption, light weight and no flickering of images, the power consumption of the head-mounted display device can be reduced, the displayed images are clearer, and the burden of eyes is smaller. In the use process, eyes of a user are not easy to feel tired, and the use comfort is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required for the description of the embodiments or exemplary techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic structural diagram of a head-mounted display device according to an embodiment of the present application;

FIG. 2 is a schematic view of the lens assembly and lamp beads of FIG. 1;

fig. 3 is a schematic structural diagram of an electronic paper display screen to be shaped according to another embodiment of the present application;

FIG. 4 is a schematic structural diagram of the electronic paper display screen to be shaped in FIG. 3;

FIG. 5 is a schematic partial cross-sectional view of the electronic paper display screen to be shaped of FIG. 3;

FIG. 6 is an equivalent schematic diagram of the storage capacitor formed between the display electrode and the auxiliary electrode in FIG. 5;

fig. 7 is a schematic structural diagram of a forming mold of a method for manufacturing a head-mounted display device according to still another embodiment of the present disclosure;

fig. 8 is a flowchart of a method for manufacturing a head-mounted display device according to another embodiment of the present application.

Wherein, each reference sign in the figure:

100. an electronic paper display screen; 10. a thin film layer; 20. an electronic ink layer; 30. an array layer; 40. a substrate layer; 11. a common electrode layer; 31. a substrate; 311. island regions; 312. a telescoping zone; 313. a hollowed hole; 33. a first connecting line; 34. a second connecting line; 71. a gate; 72. an active layer; 73. a source electrode; 74. a drain electrode; 751. a lower insulating layer; 752. an upper insulating layer; 200. a forming die; 201. a forming cavity; 202. an air suction hole; 77. a hard substrate; 32. a thin film transistor; 51. a fixing member; 511. the accommodating groove; 53. a lens assembly; 54. a lamp bead; 761. a display electrode layer; 762. an auxiliary electrode layer; 9. and a storage capacitor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings, are for convenience of description only, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application, and the specific meaning of the terms described above may be understood by those of ordinary skill in the art as appropriate. The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.

Referring to fig. 1 to 3, a head-mounted display device is provided in an embodiment of the present application, which may be worn on a head of a human body. The head-mounted display device includes: the electronic paper display 100 comprises a fixing piece 51, a light source, a lens assembly 53 arranged opposite to the fixing piece 51 and an electronic paper display screen 100 connected with the fixing piece 51. The electronic paper display 100 employs an electrophoretic display (EPD) as a display panel, which has a display effect similar to that of natural paper, and is characterized by high contrast, low power consumption, and capability of displaying texts and images in a manner similar to that of a printed material without flickering. The fixing member 51 is responsible for fixing the whole electronic paper display 100 so that it remains stable during use. The lens assembly 53 is disposed in front of the fixing member 51, and eyes of the head of the human body are located behind the lens assembly 53, and the lens assembly 53 functions to refract light so that a user can see what is displayed on the clear electronic paper display screen 100. The electronic paper display 100 is located between the fixing member 51 and the lens assembly 53, and functions to display an image.

The head mounted display device also includes a light source adjacent the lens assembly 53 and projecting light toward the electronic paper display 100. After being reflected by the electronic paper display screen 100, the light is projected back to the lens assembly 53 and finally projected into the eyes of the user, so that the user can see the image displayed by the electronic paper display screen 100.

The head-mounted display device provided in this embodiment includes a light source, a lens assembly 53, and an electronic paper display 100. Because the electronic paper display screen 100 is used as a means for displaying images, the electronic paper display screen 100 has the characteristics of low power consumption, light weight and no flickering of images, so that the power consumption of the head-mounted display device can be reduced, the displayed images are clearer, and the burden of eyes is smaller. In the use process, eyes of a user are not easy to feel tired, and the use comfort is improved.

In some embodiments, the light source includes a plurality of beads 54, each bead 54 being arranged in sequence along the circumference of the lens assembly 53. Optionally, the light bead 54 is an LED light bead, which has the characteristics of energy saving, high reliability, low cost, and the like. In other embodiments, the light bead 54 may be other light emitting devices, which are not limited herein, and may be selected according to practical situations.

Referring to fig. 4 to 5, in some embodiments, the electronic paper display 100 includes a thin film layer 10 made of a thermoplastic and transparent material, an electronic ink layer 20 for displaying an expression of a human face, an array layer 30 that is stretchable and deformable and is used for controlling the electronic ink layer 20, and a substrate layer 40 made of a transparent material, the substrate layer 40, the array layer 30, the electronic ink layer 20, and the thin film layer 10 are sequentially stacked, the electronic paper display 100 further includes a driving structure for driving the array layer 30, and a surface of the thin film layer 10 facing the substrate layer 40 is further provided with a common electrode layer 11.

Referring to fig. 4 to 5, alternatively, the material of the film layer 10 may be PET (polyethyleneterephthalate) plastic, and the material of the substrate layer 40 may be PP (polypropylene) plastic, PET plastic, PC (Polycarbonate) plastic, PS (Polystyrene) plastic, ABS (AcrylonitrileButadiene Styrene plastic) plastic, AS (acrylonitrile-styrene copolymer) plastic, or the like.

It can be appreciated that the film layer 10 and the substrate layer 40 made of thermoplastic materials can form the electronic paper display screen 100 on a complex space curved surface, so as to realize the shaping and normal display of the electronic paper display screen 100 on the complex curved surface.

Referring to fig. 4 to 5, the thin film layer 10 is optionally coated with a transparent common electrode layer 11, and the material of the common electrode layer 11 may be ITO (Indium tinoxide) or PEDOT: PSS (3, 4-ethylioxythiophen): polystyrene.

Referring to fig. 4 to 5, in some embodiments, the array layer 30 includes a substrate 31, a thin film transistor 32, a first connection line 33 and a second connection line 34, the thin film transistor 32, the first connection line 33 and the second connection line 34 are all connected to the substrate 31, the thin film transistor 32 is arranged on the substrate 31 in an array manner, and the thin film transistors 32 are arranged at intervals; any two adjacent thin film transistors 32 are connected by a first connection line 33 along the first direction; any two adjacent thin film transistors 32 are connected by a second connection line 34 along a second direction, and the first direction is orthogonal to the second direction. Alternatively, the substrate 31 may be made of a thermoplastic and transparent material to facilitate heat setting of the array layer 30. It will be appreciated that the plurality of thin film transistors 32 are arranged in a plurality of columns along a first direction, and the plurality of thin film transistors 32 are arranged in a plurality of rows along a second direction, i.e., the first direction is the direction along which the columns extend, the second direction being the direction along which the rows extend.

Referring to fig. 4, optionally, the first direction is an X direction, and the second direction is a Y direction.

Alternatively, the first connection line 33 is a scan line, and the second connection line 34 is a signal line.

Alternatively, the electronic ink layer 20 has a plurality of display areas, each of which is disposed corresponding to each of the thin film transistors 32, respectively.

Referring to fig. 4 to 5, in some embodiments, the substrate 31 is provided with a hollow hole 313; a hollow hole 313 is arranged between any two adjacent first connecting lines 33 along the first direction, or a hollow hole 313 is arranged between any two adjacent second connecting lines 34 along the second direction. By providing the plurality of hollowed holes 313, the stretchability of the substrate 31 is improved, and the hollowed holes 313 are provided between the two first connecting lines 33 or the two second connecting lines 34, so that the first connecting lines 33 and the second connecting lines 34 can be kept stable as much as possible when the substrate 31 is bent and deformed. Referring to fig. 4 to 5, optionally, the materials of the signal line and the scan line are stretchable and elastically deformed, such as: multiple stacked metal layer materials, stretchable electrode materials (PEDOT: PSS), and metal nanowire doped polymer materials, and the like.

Optionally, the electronic paper display 100 further includes a driving component for driving each of the thin film transistors 32, where the driving component is active driving.

Referring to fig. 4 to 5, in some embodiments, the substrate 31 includes a plurality of island regions 311 and a plurality of extension regions 312, and each of the thin film transistors 32 is disposed in each of the island regions 311; any two adjacent island regions 311 are connected along a first direction through a telescopic region 312, and corresponding first connecting lines 33 are arranged in corresponding telescopic regions 312; any two adjacent island regions 311 are also connected along the second direction by a telescopic region 312, and the corresponding second connecting line 34 is arranged in the corresponding telescopic region 312; the hollow hole 313 is located between two adjacent telescopic areas 312 along the first direction or the second direction.

Referring to fig. 4 to 5, alternatively, island 311 is mainly used to carry devices such as thin film transistor 32, and is not substantially deformed by stretching. The stretching region 312 stretches and deforms when the electronic paper display 100 performs shaping of a spatially complex curved surface, so that the electronic paper display 100 is shaped into a predetermined spatially curved surface shape.

In some embodiments, the first connection lines 33 are disposed obliquely with respect to the first direction, the second connection lines 34 are disposed obliquely with respect to the second direction, and the first connection lines 33 are disposed non-parallel to the second connection lines 34.

The first connecting wires 33 and the second connecting wires 34 are obliquely arranged, the hollowed holes 313 are formed between the two adjacent first connecting wires 33 or the two adjacent second connecting wires 34, namely, the base plate 31 at the position where the first connecting wires 33 and the second connecting wires 34 are located can form an oblique hinge, so that the base plate 31 is equivalent to a net plate which is connected through a plurality of hinges, the stretching and bending effects can be better achieved, the electronic paper display screen 100 can be stretched in any direction, seamless attachment can be achieved on the surface of a non-planar object, and the electronic paper display screen 100 is better in connection and installation effect on the non-planar object and attractive in appearance.

Optionally, the first connection line 33 may be connected to opposite angles of two adjacent thin film transistors 32 in the first direction X, so that an inclination angle of the first connection line 33 may be increased, when the electronic paper display screen 100 is stretched, the first connection line 33 may perform length compensation through elastic deformation thereof, and in the stretching process, the first connection line 33 may also perform micro rotation, that is, an included angle between the first connection line 33 and the first direction may be reduced, and the first connection line 33 may also perform length compensation through a change of its position, thereby being beneficial to expanding a stretchable range of the electronic paper display screen 100 and making it better stretched in the extending direction of the first connection line 33.

It can be understood that the second connection line 34 may be connected to opposite angles of two adjacent tfts 32 in the second direction Y, so that an inclination angle of the second connection line 34 may be increased, when the electronic paper display screen 100 is stretched, the second connection line 34 may perform length compensation through elastic deformation thereof, and meanwhile, in the stretching process, the second connection line 34 may also perform tiny rotation, that is, an included angle between the second connection line 34 and the second direction may be reduced, and the second connection line 34 may also perform length compensation through a change of its position, thereby being beneficial to expanding a stretchable range of the electronic paper display screen 100 and making it better stretched in an extending direction of the second connection line 34.

Since two diagonal lines of two adjacent thin film transistors 32 are arranged in the first direction X, two diagonal lines of the first connecting line 33 are correspondingly arranged, two diagonal lines of two adjacent thin film transistors 32 are correspondingly arranged in the second direction Y, and two diagonal lines of the second connecting line 34 are correspondingly arranged, however, it should be noted that in order to expand the stretchable direction of the electronic paper display screen 100, the electronic paper display screen 100 can be stretched in any direction, the oblique direction of the first connecting line 33 is different from the oblique direction of the second connecting line 34, that is, the first connecting line 33 is not parallel to the second connecting line 34, so that the stretchable direction of the hinge at the position of the first connecting line 33 is different from the stretchable direction of the hinge at the position of the second connecting line 34, which is beneficial to realizing the stretching deformation effect of the electronic paper display screen 100 in any direction.

In one embodiment, any two first connection lines 33 are parallel to each other; any two second connecting lines 34 are parallel to each other. In this way, the extending directions of the first connecting lines 33 are kept consistent, and the extending directions of the second connecting lines 34 are kept consistent, so that the electronic paper display screen 100 is stretched in the extending directions of the first connecting lines 33 and is prevented from stretching in other directions when stretched in the extending directions of the second connecting lines 34, the electronic paper display screen 100 is easier to stretch, the attaching effect is better when the surface of a non-planar object is attached, gaps are avoided, the integrated attachment of the electronic paper display screen 100 on the surface of the non-planar object is realized, and the electronic paper display screen 100 is better installed on the non-planar object.

It should be noted that any two first connection lines 33 are parallel to each other and the first connection lines 33 are connected to opposite angles of two adjacent thin film transistors 32 arranged in the first direction X, any two second connection lines 34 are parallel to each other and the second connection lines 34 are connected to opposite angles of two adjacent thin film transistors 32 arranged in the second direction Y, so that the extending directions of the first connection lines 33 and the extending directions of the second connection lines 34 are perpendicular to each other, which is beneficial for the electronic paper display 100 to be deformed in any direction. Meanwhile, when two adjacent thin film transistors 32 are connected, the first connecting wire 33 and the second connecting wire 34 are directly connected to the opposite angles of the two adjacent thin film transistors 32, so that the difficulty in setting the first connecting wire 33 and the second connecting wire 34 is greatly reduced, and the manufacturing efficiency of the electronic paper display screen 100 is improved.

Referring to fig. 4 to 5, the thin film transistor 32 may alternatively include a hard substrate 77, a gate electrode 71 on the hard substrate 77, a lower insulating layer 751 on the hard substrate 77 and covering the gate electrode 71, an active layer 72 on the lower insulating layer 751, an upper insulating layer 752 covering the lower insulating layer 751, and a source electrode 73 and a drain electrode 74 on opposite ends of the active layer 72, respectively. The hard substrate 77 is made of hard material, which may be glass, silicon or hard PI (Polyimide). Therefore, the thin film transistor 32 can be stably arranged on the island region 311, and the normal working performance of the thin film transistor 32 is not affected when the island region 311 is stretched and deformed, so that the electronic paper display screen 100 can be ensured to normally display when being stretched and deformed, and the application potential of the electronic paper display screen 100 can be expanded.

Referring to fig. 5, a display electrode layer 761 and an auxiliary electrode layer 762 are disposed on two sides of the lower insulating layer 751, and a storage capacitor 9 is formed between the display electrode layer 761 and the auxiliary electrode layer 762, and the equivalent circuit thereof is shown in fig. 6. The auxiliary electrode layer 762 and the gate electrode 71 are not connected to each other, that is, the auxiliary electrode layer 762 is separately provided, so that the auxiliary electrode layer 762 and the gate electrode 71 respectively perform different functions without interfering with each other.

In some embodiments, the array layer 30 further includes a reflective layer, the reflective layer is disposed on a surface of the electronic ink layer 20 facing the substrate 31, and the reflective layer is provided with avoiding holes corresponding to positions of the thin film transistors 32, and the reflective layer covers the first connection lines 33 and the second connection lines 34, and the thin film transistors 32 are not covered by the reflective layer through the corresponding avoiding holes. In this embodiment, the color of the reflective layer is white, and in other embodiments, the color of the reflective layer may be other colors, which are not limited herein, and may be selected according to practical situations.

Optionally, the total reflectivity of the reflective layer, the thin film layer 10, the common electrode layer 11, and the electronic ink layer 20 ranges from 20% to 99%, and most of the light can be reflected to the effective area of the lens assembly 53.

In some embodiments, the substrate 31 is provided with a directional diffusion layer, and the substrate 31 may be provided with a directional diffusion layer by a laser engraving process, and the directional diffusion layer may reflect most of the light to the effective area of the lens assembly 53.

Referring to fig. 1 to 3, in some embodiments, a display surface of the electronic paper display screen 100 is a plane, a curved surface, or a concave surface.

Alternatively, when the display surface of the electronic paper display 100 is a flat screen, the substrate layer 40 may be made of a hard substrate, such as glass.

When the display surface of the electronic paper display screen 100 is a curved surface screen, the substrate layer 40 is made of a flexible material, such as polyimide PI, so that the electronic paper display screen 100 is a flexible electronic paper display screen 100, and the electronic paper display screen 100 can be bent and twisted at multiple angles, so that the display surface of the electronic paper display screen 100 is a curved surface.

When the display surface of the electronic paper display screen 100 is a concave curved surface screen, the substrate layer 40 may be made of a thermoplastic material, so that the electronic paper display screen 100 is a deformable curved surface electronic paper screen.

Referring to fig. 1-2, in some embodiments, the lens assembly 53 includes at least one of a parabolic lens group, a fresnel lens group, and a folded optical path lens group. It is understood that the lens assembly 53 may be a parabolic lens group, a fresnel lens group, or a folded optical path lens group. It will also be appreciated that the lens assembly 53 is a combination of any two or three of a parabolic lens group, a fresnel lens group or a folded optical path lens group. The present invention is not limited thereto, and may be selected according to actual conditions.

Optionally, the lens component 53 enables the head-mounted display device to have a large screen view, and the distance of the large screen view is in the range of 0.5-10 m.

Optionally, the pixel density of the electronic paper display 100 ranges from 400 to 5000ppi.

Optionally, the head-mounted display device further includes two legs, one end of each of the two legs is connected to two ends of the fixing member 51, and the other ends of the two legs are respectively hung on two ears of the head of the human body. The head-mounted display device further comprises a loudspeaker, wherein the loudspeaker is arranged in at least one of the glasses legs, and the loudspeaker is positioned in the middle of the glasses leg, so that the loudspeaker aims at the ears to sound, and a user can read books and listen to music. Optionally, the head-mounted display device further includes a power source, wherein the power source is disposed inside one of the glasses legs or at the position of the hindbrain of the head of the human body, and the power source is electrically connected to the electronic paper display screen 100 through a wire disposed inside the glasses legs.

Optionally, the head-mounted display device further includes a logic control unit, where the logic control unit is used to control the electronic paper display screen 100 and is located at the hindbrain of the head of the human body, and balance the center of gravity of the head-mounted display device, so as to avoid the front weight and the rear weight of the head-mounted display device.

The head-mounted display device provided by the embodiment can realize a light, non-blinking and reflective virtual large screen, and is used for long-time reading scenes such as large-screen reading novels, cartoon, literature data, word office, programming and the like.

Referring to fig. 7 to 8, the present embodiment further provides a method for manufacturing a head-mounted display device, which is used for manufacturing a head-mounted display device, and the method for manufacturing a head-mounted display device includes the following steps:

s1: preparing an electronic paper display screen 100 to be formed, a fixing piece 51, a lamp bead 54, a lens component 53, a forming die 200, an air extracting device and a heating device, wherein the forming die 200 is provided with a forming cavity 201 with an opening, the cavity bottom of the forming cavity 201 is provided with an air extracting hole 202 communicated with an external space, and the substrate layer 40 is made of a thermoplastic material;

s2: placing the electronic paper display screen 100 to be formed at the opening;

s3: referring to fig. 6 to 7, a heating device heats the forming mold 200 to heat the electronic paper display 100 to be formed to a predetermined temperature; heating the thermoplastically deformable electronic paper display screen 100 to the softening temperature of the film layer 10 and the substrate layer 40, wherein the softening temperature range is 75-150 ℃, and the front and back sides of the electronic paper display screen 100 can be controlled to a certain temperature difference (delta T is less than or equal to 20 ℃), namely the temperature of the film layer 10 is lower than the temperature of the substrate layer 40, so as to avoid overlarge difference of the softening degrees of the film layer 10 and the substrate layer 40;

s4: the air extraction end of the air extraction device is communicated with the air extraction hole 202 and is used for extracting air in the forming cavity 201, so that the electronic paper display screen 100 to be formed is recessed and bent towards the inside of the forming cavity 201 under the action of vacuum negative pressure and is formed into a preset shape; optionally, the thickness of the film layer 10 ranges from 0.1 to 1.5mm, and the thickness of the substrate layer 40 ranges from 0.3 to 3mm;

s5: the fixing member 51 is connected to the electronic paper display 100, the lens assembly 53 is mounted and positioned with respect to the fixing member 51, and the plurality of lamp beads 54 are mounted on the side surface of the lens assembly 53. The fixing member 51 has a receiving groove 511, and the electronic paper display 100 has a shape adapted to the shape of the inner wall of the receiving groove 511.

The foregoing is merely an alternative embodiment of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the scope of the claims of the present application.

Claims (6)

1. A head-mounted display device, comprising: the electronic paper display screen is arranged opposite to the lens assembly, the light source is adjacent to the lens assembly and projects light rays towards the electronic paper display screen, and the electronic paper display screen reflects the light rays back to the lens assembly;

the electronic paper display screen comprises a film layer, an electronic ink layer, an array layer, a substrate layer, a driving structure and a public electrode layer, wherein the electronic ink layer is arranged to display preset content, the array layer is arranged to control the electronic ink layer, the substrate layer, the array layer, the electronic ink layer and the film layer are sequentially stacked, the driving structure is arranged to drive the array layer, and the surface of the film layer facing the substrate layer is also provided with the public electrode layer;

the array layer comprises a substrate, thin film transistors, a first connecting wire and a second connecting wire, wherein the thin film transistors, the first connecting wire and the second connecting wire are all connected with the substrate, a plurality of thin film transistors are arrayed on the substrate, and the thin film transistors are arranged at intervals; any two adjacent thin film transistors are connected through a first connecting wire along a first direction; any two adjacent thin film transistors are connected through a second connecting line along a second direction, and the first direction is orthogonal to the second direction;

the substrate is provided with a hollowed-out hole; the hollowed-out holes are formed between any two adjacent first connecting lines along the first direction, or the hollowed-out holes are formed between any two adjacent second connecting lines along the second direction;

the substrate comprises a plurality of island regions and a plurality of telescopic regions, and each thin film transistor is respectively arranged in each island region; any two adjacent island regions are connected along a first direction through one telescopic region, and the corresponding first connecting lines are arranged in the corresponding telescopic regions; any two adjacent island regions are also connected along a second direction through one telescopic region, and the corresponding second connecting lines are arranged in the corresponding telescopic regions; the hollowed-out holes are positioned between two adjacent telescopic areas along the first direction or the second direction; the island region is used for bearing the thin film transistor and basically does not generate stretching deformation; the first connecting wire and the second connecting wire are made of elastic materials, and in the stretching process, the first connecting wire and the second connecting wire can slightly rotate.

2. The head-mounted display device of claim 1, wherein: the light source comprises a plurality of lamp beads, and each lamp bead is sequentially arranged along the circumferential direction of the lens assembly.

3. The head-mounted display device of any of claims 1-2, wherein: the first connecting line is obliquely arranged relative to the first direction, the second connecting line is obliquely arranged relative to the second direction, and the first connecting line and the second connecting line are not parallel.

4. The head-mounted display device of any of claims 1-2, wherein: the array layer further comprises a reflecting layer, the reflecting layer is positioned on the surface of the electronic ink layer, which faces the substrate, and the positions of the reflecting layer, which correspond to the thin film transistors, are provided with avoiding holes, or the substrate is provided with a directional diffusion layer.

5. The head-mounted display device of any of claims 1-2, wherein: the display surface of the electronic paper display screen is a plane or a curved surface.

6. A method for manufacturing a head-mounted display device, for manufacturing the head-mounted display device according to any one of claims 1 to 4, characterized in that: the preparation method of the head-mounted display device comprises the following steps:

preparing an electronic paper display screen to be formed, a light source, a lens assembly, a forming die, an air extracting device and a heating device, wherein a forming cavity with an opening is formed in the forming die, an air extracting hole communicated with an external space is formed in the bottom of the forming cavity, and the substrate layer is made of thermoplastic materials;

placing the electronic paper display screen to be formed in the opening;

the heating device heats the forming die to heat the electronic paper display screen to be formed to a preset temperature;

the air extraction end of the air extraction device is communicated with the air extraction hole and extracts air in the forming cavity so that the electronic paper display screen to be formed is recessed and bent in the forming cavity under the action of vacuum negative pressure and is formed into a preset shape;

and fixing the electronic paper display screen, installing and positioning the lens assembly relative to the electronic paper display screen, and installing the light source on the side surface of the lens assembly.