Display device

Abstract

The utility model discloses a display device, and relates to the technical field of optical display, the display device comprises a lower cover and a panel which are buckled with each other, the lower cover and the panel enclose to form an installation space, a circuit board assembly and a display assembly are arranged in the installation space, the display assembly comprises an optical machine and an optical waveguide arranged on the light emitting side of the optical machine, and the optical waveguide is arranged on the light emitting side of the optical machine. The light machine is connected with the circuit board assembly, the panel comprises a light-transmitting area and a non-light-transmitting area, the non-light-transmitting area of the panel is further provided with an interaction piece, the interaction piece is connected with the circuit board assembly and used for inputting a user instruction to control the light machine to emit an image light beam through the circuit board assembly, and the image light beam passes through the light waveguide and then is emitted through the light-transmitting area to form a display image. The display image is a virtual image. According to the display device, the visual distance can be increased, and therefore the eyesight of a user is protected.

Description

Technical Field

[0001] The present application relates to the field of optical display technology, and in particular, to a display device. Background Art

[0002] With the development of science and technology, smart terminal devices such as mobile phones and tablets have become more and more common in people's lives. While people enjoy the convenience brought by the terminals, the longer they use the terminals, the greater the possibility of eye damage, especially since many students are starting to use educational tablets for learning. In the existing technology, the surface of the tablet is the main body of the screen display, and the viewing distance is very limited. Specifically, the viewing distance of all educational tablets currently available on the market is equal to the distance from the human eye to the tablet, and is limited by its usage scenarios, such as Figure 3 As shown in the figure, this viewing distance is usually about 0.5m, and may be shorter due to the user's bad posture. Most tablet users are teenagers, whose eyes are still in the development stage. Long-term close-range use of electronic products will cause damage to the eyes. Utility Model Content

[0003] The purpose of the present application is to provide a display device that can increase the viewing distance and thus protect the user's eyesight.

[0004] On the one hand, an embodiment of the present application provides a display device, including a lower cover and a panel that are interlocked, the lower cover and the panel enclose an installation space, a circuit board assembly and a display assembly are arranged in the installation space, the display assembly includes an optical machine and an optical waveguide arranged on the light emitting side of the optical machine, the optical machine is connected to the circuit board assembly, the panel includes a light-transmitting area and a non-light-transmitting area, the non-light-transmitting area of ​​the panel is also provided with an interactive component, the interactive component is connected to the circuit board assembly, the interactive component is used to input user instructions to control the optical machine to emit an image light beam through the circuit board assembly, the image light beam passes through the optical waveguide and then emits through the light-transmitting area to form a display image, and the displayed image is a virtual image.

[0005] As an implementable manner, the angle between the light emitting direction of the optical waveguide and the vertical line of the optical waveguide is between 6° and 12°.

[0006] As an implementable manner, when the display device is in use, the tilt angle of the panel is between 10° and 30°.

[0007] As an implementable manner, the display device further includes an audio output component connected to the circuit board assembly, and the audio output component outputs audio according to the control of the circuit board assembly.

[0008] As an implementable manner, the circuit board assembly includes a driving module and a control module, the optical machine is respectively connected to the driving module and the control module, the driving module drives the optical machine to work, the control module controls the optical machine to emit an image light beam, and the audio output component is respectively connected to the driving module and the control module, the driving module drives the audio output component to work, and the control module controls the audio output component to output audio.

[0009] As an implementable manner, the display device further includes a switch component connected to the driving module, and the switch component is connected to the optical machine to control the optical machine to turn on under the drive of the driving module when the display device is turned on.

[0010] As an implementable manner, the display component further includes a reflector, the light emitting direction of the optical machine is parallel to the plane where the optical waveguide is located, and the image light beam emitted by the optical machine is vertically incident on the optical waveguide after being reflected by the reflector.

[0011] As an implementable method, the optical waveguide includes a waveguide substrate and a coupling-in region, an expansion region and a coupling-out region arranged on the waveguide substrate. The image light beam emitted by the optical machine is coupled into the optical waveguide by the coupling-in region, and is coupled out by the coupling-out region after being expanded by the expansion region.

[0012] As an implementable manner, the outcoupling area corresponds to the light-transmitting area of ​​the panel.

[0013] As an implementable manner, the interactive component is a touch screen embedded in the panel, and the array points of the touch screen correspond one-to-one to the pixel points of the displayed image.

[0014] The beneficial effects of the embodiments of the present application include:

[0015] The display device provided by the present application includes a lower cover and a panel that are interlocked, and the lower cover and the panel are combined to form an installation space. A circuit board assembly and a display assembly are arranged in the installation space. The display assembly includes an optical machine and an optical waveguide arranged on the light-emitting side of the optical machine. The optical machine is connected to the circuit board assembly. When the display device is working, the image light beam emitted by the optical machine passes through the optical waveguide to form a virtual image located on the rear side of the optical waveguide. The panel includes a light-transmitting area and a non-light-transmitting area. The non-light-transmitting area of ​​the panel is also provided with an interactive component, which is connected to the circuit board assembly. The interactive component is used to input user instructions to control the optical machine to emit an image light beam through the circuit board assembly. The image light beam passes through the optical waveguide and then emits through the light-transmitting area to form a display image. The displayed image is a virtual image located on the rear side of the optical waveguide, so that the displayed image is formed at a farther position compared with the prior art, thereby increasing the viewing distance, which can effectively eliminate visual fatigue and protect the user's eyesight. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 One of the structural schematic diagrams of a display device provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of an exploded structure of a display device provided in an embodiment of the present application;

[0019] Figure 3 The viewing distance of the display device of the prior art;

[0020] Figure 4 A viewing distance of a display device provided in an embodiment of the present application;

[0021] Figure 5 One of the state diagrams of a display device provided in an embodiment of the present application;

[0022] Figure 6 A second state diagram of a display device provided in an embodiment of the present application;

[0023] Figure 7 A third state diagram of a display device provided in an embodiment of the present application;

[0024] Figure 8 A module diagram of a display device provided in an embodiment of the present application;

[0025] Fig. 9 A second structural schematic diagram of a display device provided in an embodiment of the present application;

[0026] Fig.10 A third structural schematic diagram of a display device provided in an embodiment of the present application;

[0027] Fig.11 One of the usage state diagrams of a display device provided in an embodiment of the present application;

[0028] Fig.12 This is a second usage status diagram of a display device provided in an embodiment of the present application.

[0029] Icons: 100-display device; 111-lower cover; 112-panel; 113-light-transmitting area; 120-circuit board assembly; 121-driving module; 122-control module; 130-display assembly; 131-optical machine; 132-optical waveguide; 133-reflecting element; 134-display image; 135-coupling area; 136-coupling area; 137-extension area; 140-interactive element; 141-indicator; 150-audio output element; 160-power supply. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present application, it should be noted that the terms "center", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] The present application provides a display device 100, such as Figure 1 and Figure 2As shown, it includes a lower cover 111 and a panel 112 that are interlocked, and the lower cover 111 and the panel 112 enclose an installation space, in which a circuit board assembly 120 and a display assembly 130 are arranged, and the display assembly 130 includes an optical machine 131 and an optical waveguide 132 arranged on the light emitting side of the optical machine 131, and the optical machine 131 is connected to the circuit board assembly 120, and the panel 112 includes a light-transmitting area 113 and a non-light-transmitting area 113, and the non-light-transmitting area 113 of the panel 112 is also provided with an interactive component 140, and the interactive component 140 is connected to the circuit board assembly 120, and the interactive component 140 is used to input user instructions to control the optical machine 131 to emit an image light beam through the circuit board assembly 120, and the image light beam passes through the light waveguide 132 and then emits through the light-transmitting area 113 to form a display image 134, and the display image 134 is a virtual image.

[0035] The display device 100 of the embodiment of the present application can be a tablet computer, a mobile phone or other handheld electronic device. Specifically, the display device 100 includes a lower cover 111 and a panel 112. The lower cover 111 and the panel 112 are buckled into a whole and an installation space is formed between the lower cover 111 and the panel 112. A circuit board assembly 120 is arranged in the installation space. The panel 112 includes a light-transmitting area 113 and a non-light-transmitting area 113. The non-light-transmitting area 113 of the panel 112 is provided with an interactive component 140. The interactive component 140 is connected to the circuit board assembly 120. The user inputs user instructions to the circuit board assembly 120 through the interactive component 140. The circuit board assembly 120 is used to control the operation of the display component 130. The display component 130 emits an image light beam according to the signal of the circuit board assembly 120. Specifically, the display assembly 130 includes an optical engine 131 and an optical waveguide 132 disposed on the light-emitting side of the optical engine 131. The optical engine 131 is connected to the circuit board assembly 120 and emits a light beam with information, namely, an image beam, according to a signal from the circuit board assembly 120. The image beam enters the optical waveguide 132, propagates in the optical waveguide 132, and is emitted by the optical waveguide 132. The image beam passes through the panel 112 and then is emitted to form a display image 134. The optical waveguide 132 can project the display image 134 to the rear of the optical waveguide 132 to form a virtual image, such as Figure 1 and Figure 4 As shown, the virtual image is the focus position of the reverse extension line of the image light beam, so that there is a certain distance between the displayed image 134 and the panel 112. The viewing distance is the distance between the human eye and the displayed image 134. Since the displayed image 134 of the display device 100 of the embodiment of the present application is located at the rear side of the panel 112, the viewing distance can be increased, thereby protecting the user's eyesight.

[0036] In order to more clearly illustrate the beneficial effects of the embodiments of the present application, reference may be made to Figure 3 and Figure 4 ,in, Figure 3 is the viewing distance of the display device 100 in the prior art ( Figure 3 Middle L1), Figure 4 The viewing distance of the embodiment of the present application ( Figure 4 L2), by Figure 3 It can be seen that the viewing distance of the display device 100 in the prior art is the distance between the human eye and the panel 112; Figure 4 It can be seen that the viewing distance of the embodiment of the present application is the sum of the distance between the human eye and the panel 112 and the distance between the panel 112 and the display image 134 . Therefore, it can be seen that the embodiment of the present application can increase the viewing distance.

[0037] The front in the above description refers to the direction of the panel 112 relative to the lower cover 111 , and conversely, the rear refers to the direction of the lower cover 111 relative to the panel 112 .

[0038] The optical engine 131 is used to emit an image beam, including a micro display chip and an imaging lens group. The micro display chip is located on the rear focal plane of the imaging lens group. The light beam emitted by the micro display chip is collimated by the imaging lens group to form a parallel light beam, which is the image beam. The micro display chip can be a self-luminous display or a display requiring a backlight, and can be, for example, a liquid crystal display, a silicon-based liquid crystal display, a digital micro mirror, an organic light emitting diode display, or a micro light emitting diode display.

[0039] The interactive component 140 can conveniently input user instructions to the circuit board assembly 120 and form interactive information with the circuit board assembly 120 .

[0040] The display device 100 provided in the present application includes a lower cover 111 and a panel 112 that are buckled together. The lower cover 111 and the panel 112 enclose an installation space, and a circuit board assembly 120 and a display assembly 130 are arranged in the installation space. The display assembly 130 includes an optical engine 131 and an optical waveguide 132 arranged on the light-emitting side of the optical engine 131. The optical engine 131 is connected to the circuit board assembly 120. When the display device 100 is working, the image light beam emitted by the optical engine 131 passes through the optical waveguide 132 to form a virtual image located on the rear side of the optical waveguide 132. The panel 112 includes a light-transmitting area 113 and a non-light-transmitting area 114. The light-transmitting area 113 and the non-light-transmitting area 113 of the panel 112 are also provided with an interactive component 140, which is connected to the circuit board assembly 120. The interactive component 140 is used to input user instructions to control the optical machine 131 to emit an image light beam through the circuit board assembly 120. The image light beam passes through the light waveguide 132 and then passes through the light-transmitting area 113 to form a display image 134. The display image 134 is a virtual image located on the rear side of the light waveguide 132, so that the display image 134 is formed at a farther position compared with the prior art, thereby increasing the viewing distance, which can effectively eliminate visual fatigue and protect the user's eyesight.

[0041] In one possible implementation of the embodiment of the present application, Fig.12 As shown, the angle between the light emitting direction of the optical waveguide 132 and the vertical line of the optical waveguide 132 is between 6° and 12°.

[0042] In actual applications, the user's usage habits of the display device 100 are: the person holds the display device 100 or places the display device 100 on the desktop, and the person uses the handheld display device 100 to play videos or read texts in a sitting state. At this time, the distance between the display device 100 and the human eye is about 50-100 cm, and the display device 100 is located below the horizontal position of the human eye's line of sight and has an inclination angle between 10° and 30°. When the human eye is in a focused state, the midline position of the eyeball in the vertical direction is -4°, and the angle between the light emitting direction of the optical waveguide 132 and the vertical line of the optical waveguide 132 is set between 6° and 12°, so that the field of view of the optical waveguide 132 can be located at a position that can be captured by the human eye's viewing angle range.

[0043] Specifically, Fig.11 As shown, when the light emitting direction of the optical waveguide 132 is perpendicular to the optical waveguide 132, the rotation angle center position of the eyeball of the human eye in the focused state is -4°, that is, Fig.11 The θ in the figure is -4°. The rotation angle θ1 of the human eye in a relaxed natural state is -20°-+15°. The optical waveguide 132 is placed below the horizontal position of the human eye's line of sight and has a certain inclination angle θ2, which is usually between 10°-30°. When the light emitting direction of the optical waveguide 132 is perpendicular to the optical waveguide 132, and the user uses the display device 100 according to the above-mentioned usage habits, the image light beam emitted by the optical waveguide 132 is misaligned with the human eye's viewing angle and cannot enter the human eye system for imaging, so that the user cannot see the corresponding display image 134, or only part of the image light beam can form the display image 134, and the formed display image 134 lacks information or has an unsatisfactory optical effect, so that the user needs to change the conventional usage habits if he wants to observe the complete picture, and use a bracket or both hands to lift the display device 100 to a height almost consistent with the horizontal position of the human eye, and the display device 100 cannot be tilted, which is very inconvenient and can only maintain a relatively difficult posture, which will bring an uncomfortable usage experience to the user. If Fig.12 As shown, when the light emitting direction of the optical waveguide 132 is set to have a certain angle with the perpendicular line of the optical waveguide 132, when the user uses the display device 100 according to the above-mentioned usage habits, the image light beam emitted by the optical waveguide 132 corresponds to the viewing angle of the human eye and can enter the human eye for imaging, thereby improving the usage experience and there is no need to change the existing usage habits.

[0044] Specifically, the specific value of the angle between the light emitting direction of the optical waveguide 132 and the optical waveguide 132 is not limited in the embodiment of the present application, and by way of example, it may be 6°, 8°, 10°, or 12°.

[0045] In addition, the angle between the light emitting direction of the optical waveguide 132 and the perpendicular line of the optical waveguide 132 in the embodiment of the present application is set based on the above-mentioned usage habits, and those skilled in the art can make specific adjustments according to the usage scenarios and usage habits of the display device 100.

[0046] Optional, such as Fig.11 and Fig.12 As shown, when the display device 100 is in use, the tilt angle of the panel 112 is between 10° and 30°.

[0047] The inclination angle of the panel 112 is set between 10° and 30°, which is coordinated with the light emitting direction of the optical waveguide 132 , and can improve the user's experience under the user's usage habits.

[0048] In one possible implementation of the embodiment of the present application, Figure 2 and Figure 8 As shown, the display device 100 further includes an audio output component 150 connected to the circuit board assembly 120 , and the audio output component 150 outputs audio according to the control of the circuit board assembly 120 .

[0049] When the display device 100 is used to play a video, when the display component 130 displays the image 134 light beam, the audio output component 150 is used to synchronously output the audio, so that the displayed image 134 and the audio are output synchronously, and the user receives the displayed image 134 and the audio at the same time.

[0050] Specifically, the specific structure of the audio output component 150 is not limited in the embodiment of the present application. It can be a speaker for outputting audio, or an audio output interface connected to an external speaker, or a speaker and an interface coexisting. Technical personnel in this field can make specific settings based on the internal structure of the display device 100.

[0051] Optional, such as Figure 2 and Figure 8 As shown, the circuit board assembly 120 includes a driving module 121 and a control module 122, the optical machine 131 is respectively connected to the driving module 121 and the control module 122, the driving module 121 drives the optical machine 131 to work, the control module 122 controls the optical machine 131 to emit an image light beam, and the audio output component 150 is respectively connected to the driving module 121 and the control module 122, the driving module 121 drives the audio output component 150 to work, and the control module 122 controls the audio output component 150 to output audio.

[0052] Those skilled in the art can understand that when the optical machine 131 and the audio output component 150 are working, they need to provide power and signals, wherein power makes the components work, and the specific working conditions are controlled according to the signals. In the embodiment of the present application, the circuit board assembly 120 includes a driving module 121 and a control module 122, wherein the driving module 121 is electrically connected to the optical machine 131 and the audio output component 150, respectively, to provide power to the optical machine 131 and the audio output component 150, and the control module 122 is signal-connected to the optical machine 131 and the audio output component 150, respectively, and the control module 122 controls the optical machine 131 to emit a corresponding image light beam according to the signal, and controls the audio output component 150 to output sound.

[0053] It is understandable that the driving module 121 needs to obtain the power supply 160 when providing power to the optical engine 131 and the audio output element 150, that is, the display device 100 also includes the power supply 160. Figure 2 As shown, the power supply 160 is connected to the driving module 121, and the driving module 121 processes the power supply of the power supply 160 and transmits it to the optical machine 131 or the audio output component 150. For example, the power supply 160 can be as follows Figure 2 The battery, or power supply 160 interface shown, wherein the power supply 160 interface is used to connect the external power supply 160 and the circuit board assembly 120, so that the external power supply 160 supplies power to the driving module 121 in the circuit board assembly 120; the battery is connected to the circuit board assembly 120 to supply power to the driving module 121 in the circuit board assembly 120.

[0054] In one possible implementation of the embodiment of the present application, Figure 2 As shown, the display device 100 further includes a switch component connected to the driving module 121 , and the switch component is connected to the optical engine 131 to control the optical engine 131 to start up when the display device 100 is turned on and driven by the driving module 121 .

[0055] After the display device 100 is turned on, the driving module 121 supplies power, and the driving module 121 drives the switch component to open, and the switch component activates the optical machine 131; similarly, after the display device 100 is turned off, the driving module 121 drives the switch component to close, and turns off the optical machine 131. In this way, the optical machine 131 is only in the on state when the display device 100 is turned on, thereby preventing the optical machine 131 from being in the standby state for a long time, which affects the service life of the optical machine 131.

[0056] Specifically, the structure of the switch assembly is not limited in the present application embodiment, and can be exemplified as follows: Figure 2 Motor shown.

[0057] Optional, such as Figure 2As shown, the display assembly 130 further includes a reflector 133 , the light emitting direction of the optical engine 131 is parallel to the plane where the optical waveguide 132 is located, and the image light beam emitted by the optical engine 131 is vertically incident on the optical waveguide 132 after being reflected by the reflector 133 .

[0058] The length of the optical machine 131 along the light emitting direction is relatively long. In order to reduce the size of the display device 100 in the thickness direction, the embodiment of the present application sets a reflector 133 on the light emitting side of the optical machine 131. The image light beam emitted by the optical machine 131 is reflected by the reflector 133 and then enters the coupling-in area 135 of the incident light waveguide 132.

[0059] In one possible implementation of the embodiment of the present application, Fig.10 As shown, the optical waveguide 132 includes a waveguide substrate and a coupling-in region 135, an expansion region 137 and a coupling-out region 136 arranged on the waveguide substrate. The image light beam emitted by the optical machine 131 is coupled into the optical waveguide 132 by the coupling-in region 135, and is coupled out by the coupling-out region 136 after being expanded by the expansion region 137.

[0060] The image light beam is coupled into the optical waveguide 132 by the coupling-in region 135, propagates to the expansion region 137 by total reflection in the optical waveguide 132, and is finally coupled out by the coupling-out region 136 after being expanded by the expansion region 137. The expansion region 137 expands the image light beam, which can improve the uniformity of the image light beam, thereby improving the uniformity of the displayed image 134.

[0061] In addition, in practical applications, Fig. 9 As shown, only the coupling-in region 135 and the coupling-out region 136 may be provided on the optical waveguide 132 to realize the image light beam forming the display image 134 .

[0062] Specifically, grating units with different parameters are respectively arranged in the coupling-in region 135, the expansion region 137 and the coupling-out region 136 to achieve coupling-in, expansion and coupling-out of the image light beam. The grating unit may be a surface relief grating or a volume holographic grating.

[0063] In practical applications, the outcoupling region 136 corresponds to the light-transmitting region 113 of the panel 112 , so that the light beams outcoupled from the outcoupling region 136 can all be emitted through the light-transmitting region 113 .

[0064] In one possible implementation of the embodiment of the present application, Figure 1 As shown, the interactive element 140 is a touch screen embedded in the panel 112 , and the array points of the touch screen correspond one-to-one to the pixel points of the displayed image 134 .

[0065] When the display device 100 is in use, when a finger slides or clicks on the touch screen to operate the display device 100, specifically, when the finger slides on the touch screen, the corresponding indicator 141 slides on the virtual image. Figure 5 As shown, when the display device 100 is in the standby state, an indicator 141 is formed on the display image 134; Figure 6 As shown in , when a finger clicks somewhere on the touch screen, clicking means selection; Figure 7 As shown, it is selected.

[0066] When the interactive component 140 is a touch screen, the touch screen is embedded in the panel 112 and exposed through the panel 112. The touch screen includes a plurality of array points arranged in a matrix. Specifically, the touch screen is an array of rows and columns made of a printed circuit board, and the printed circuit board is stacked with a surface plastic film. When a finger clicks a certain array point, the capacitance at the array point changes, generating a click signal, and transmitting the click signal to the control module 122 of the circuit board assembly 120. The control module 122 controls the optical machine 131 and the audio output component 150 to work according to the click signal, that is, the touch screen of the embodiment of the present application is based on the principle of capacitive sensing.

[0067] It should be noted that the touch screen is only one form of the interactive element 140 of the present application. In practical applications, the interactive element 140 may also be an interactive element 140 of other structures, for example, Figure 8 The remote controller shown as the interactive module in the block diagram may also be a connection module configured to be connected to other terminal signals, and the other terminals control the operation of the display device 100 through signals.

[0068] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A display device, characterized in that: The invention comprises a lower cover and a panel which are interlocked, and the lower cover and the panel enclose an installation space, and a circuit board assembly and a display assembly are arranged in the installation space, and the display assembly comprises an optical machine and an optical waveguide arranged on the light emitting side of the optical machine, and the optical machine is connected with the circuit board assembly, and the panel comprises a light-transmitting area and a non-light-transmitting area, and an interactive component is further arranged in the non-light-transmitting area of ​​the panel, and the interactive component is connected with the circuit board assembly, and the interactive component is used to input user instructions to control the optical machine to emit an image light beam through the circuit board assembly, and the image light beam passes through the light waveguide and then is emitted through the light-transmitting area to form a display image.

2. The display device according to claim 1, characterized in that The angle between the light emitting direction of the optical waveguide and the vertical line of the optical waveguide is between 6° and 12°.

3. The display device according to claim 1, characterized in that When the display device is in use, the tilt angle of the panel is between 10° and 30°.

4. The display device according to claim 1, characterized in that It also includes an audio output component connected to the circuit board assembly, and the audio output component outputs audio according to the control of the circuit board assembly.

5. The display device according to claim 4, characterized in that The circuit board assembly includes a driving module and a control module, the optical machine is connected to the driving module and the control module respectively, the driving module drives the optical machine to work, the control module controls the optical machine to emit an image light beam, the audio output component is connected to the driving module and the control module respectively, the driving module drives the audio output component to work, and the control module controls the audio output component to output audio.

6. The display device according to claim 5, characterized in that It also includes a switch component connected to the driving module, and the switch component is connected to the optical machine to control the optical machine to turn on under the drive of the driving module when the display device is turned on.

7. The display device according to claim 1, characterized in that The display assembly further includes a reflector, the light emitting direction of the optical machine is parallel to the plane where the optical waveguide is located, and the image light beam emitted by the optical machine is vertically incident on the optical waveguide after being reflected by the reflector.

8. The display device according to claim 1, characterized in that The optical waveguide includes a waveguide substrate and a coupling-in region, an expansion region and a coupling-out region arranged on the waveguide substrate. The image light beam emitted by the optical machine is coupled into the optical waveguide by the coupling-in region, and is coupled out by the coupling-out region after being expanded by the expansion region.

9. The display device according to claim 8, characterized in that The outcoupling area corresponds to the light-transmitting area of ​​the panel.

10. The display device according to claim 1, characterized in that The interactive component is a touch screen embedded in the panel, and the array points of the touch screen correspond one-to-one to the pixel points of the displayed image.

Images