CN206638892U - A kind of VR head-mounted displays - Google Patents

Abstract

The utility model discloses a VR head-mounted display, which comprises a main body and an infrared lens installed inside the main body, an infrared sensor, an infrared interference suppression module and an infrared emitting device; The mouth of the mouth is used to receive infrared light and convert the received infrared light into an electrical signal and send it; the infrared interference suppression module is used to receive the electrical signal sent by the infrared sensor and filter the received electrical signal to obtain the sensitive band The electrical signal corresponding to the infrared light; and according to the electrical signal corresponding to the infrared light of the band, a driving signal is generated to drive the infrared emitting device to emit infrared light; the infrared lens is used to receive the infrared light emitted by the infrared emitting device. The VR head-mounted display of the utility model effectively suppresses the interference of reflected infrared light and useless infrared in the external space through the built-in CCD infrared lens, so that the service life of the lens is longer and the positioning accuracy can be effectively improved.

Description

A VR head-mounted display

technical field

The utility model relates to a VR head-mounted display, in particular to a VR head-mounted display with the function of suppressing infrared crosstalk.

Background technique

At present, VR (virtual reality) head-mounted displays mostly use infrared cameras, IMUs (inertial measurement units) and handles (infrared lights on the handle) to realize 6 Dof (degrees of freedom), three-dimensional real-time modeling of the real environment, and day and night space positioning of the handle. After the infrared is emitted, the infrared camera on the VR head-mounted display can capture the infrared light on the handle to emit infrared light) and cooperate to realize the 6dof action in the VR game system and the positioning of the handle in the game space. In addition, the VR system can emit infrared light through the TOF (time of flight) module and receive infrared light reflected from objects in the space to calculate the depth of field of the object in space to achieve 3D real-time modeling of the real environment. In general, the infrared camera is better sensitive to infrared light with a single carrier frequency, but in the environment where the VR system is located, sometimes there are at least infrared light emitted by the infrared light on the handle and infrared light emitted by the TOF module and reflected by objects in space And various kinds of infrared light such as infrared light in the environment where the space itself exists. In this way, after the multi-channel superimposed infrared light enters the infrared sensor on the VR head-mounted display, it cannot capture an accurate image of the structure to be photographed (such as a photosphere) on the handle, resulting in problems with the positioning accuracy of the handle.

Contents of the invention

In order to solve the problem that the existing head-mounted display with an infrared camera is easily interfered by external infrared light, resulting in poor positioning accuracy of the handle, the utility model proposes a VR head-mounted display.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions to realize:

A VR head-mounted display, including a body and an infrared lens installed inside the body, the VR head-mounted display also includes an infrared sensor, an infrared interference suppression module, and an infrared emitting device;

There is an assembly port on the front end of the body, the infrared sensor is arranged at the mouth of the assembly port, and the photosensitive surface of the infrared sensor faces the outside of the assembly port for receiving infrared light and converting the received Infrared light is converted into an electrical signal and sent;

The infrared interference suppression module is used to receive the electrical signal sent by the infrared sensor and filter the received electrical signal to obtain the electrical signal corresponding to the infrared light in the sensitive band; and generate The driving signal drives the infrared emitting device to emit infrared light;

The infrared lens is used to receive the infrared light emitted by the infrared emitting device.

Further, the infrared lens is a CCD lens or a CMOS lens.

Further, the infrared interference suppression module includes an amplifying circuit, a filtering circuit, and a shaping circuit, the amplifying circuit, the filtering circuit, and a shaping circuit are arranged on a circuit board, the infrared sensor is connected to the amplifying circuit, and the amplifying circuit Amplify the detection signal of the infrared sensor and send it to the filter circuit for filtering out the electrical signal corresponding to the infrared light other than the sensitive band of the infrared lens, and after being shaped by the shaping circuit A drive signal is generated to drive the infrared emitting device to emit infrared light in the sensitive band of the infrared lens.

Further, the circuit board is embedded in the assembly opening, and the area of the circuit board is not smaller than that of the assembly opening, so as to block the assembly opening.

Further, the circuit board is a PCB board.

Further, there are multiple infrared sensors, and both the infrared interference suppression module and the infrared emitting device are one.

Further, when there are multiple infrared sensors, the multiple infrared sensors are uniformly arranged around the assembly opening.

Further, the amplifying circuit includes a PNP transistor and an NPN transistor, the base of the PNP transistor is connected to the infrared sensor, the emitter is connected to a DC power supply, and the collector is connected to the base of the NPN transistor. The collector of the NPN transistor is connected to the DC power supply, and the emitter is connected to the ground terminal.

Further, the shaping circuit is a Schmitt trigger.

Further, the filter circuit is a band-pass filter circuit composed of a high-pass filter circuit and a low-pass filter circuit.

Compared with the prior art, the advantages and positive effects of this utility model are: the VR head-mounted display of the utility model, by setting the infrared lens inside the body of the VR head-mounted display, blocks the light from entering the external space, which can avoid The influence of other infrared light in the space on the infrared lens, the principle of the VR head-mounted display of the present invention is: firstly, the infrared sensor is used to detect the infrared light of the whole band in the external space and perform photoelectric conversion to obtain the corresponding infrared light of the whole band. Electrical signal, after the electrical signal corresponding to the infrared light of the whole band is filtered by the infrared interference suppression module, only the electrical signal corresponding to the infrared light in the sensitive band of the infrared lens is retained, and the filtered electrical signal is generated into a driving signal to drive the infrared The transmitting device generates infrared light in the sensitive band of the infrared lens, which realizes the electrical-optical conversion, and the generated infrared light is received by the infrared lens. Since the interference suppression module can filter out the electrical signal of the infrared light except for the sensitive band of the infrared lens, The interference of reflected infrared light and space useless infrared is effectively suppressed. The filtered electrical signal is the electrical signal corresponding to the infrared light in the sensitive band of the infrared lens, and its intensity reflects the intensity of the infrared light used for positioning. - Light conversion, only emits infrared light in the sensitive band of the infrared lens, which greatly improves the purity of the positioning infrared light and effectively improves the positioning accuracy. In addition, the built-in infrared lens can protect the infrared lens and ensure The cleanness of the photosensitive surface of the infrared lens makes the life of the lens longer and effectively enhances the competitiveness of the product.

After reading the detailed description of the embodiments of the utility model in conjunction with the accompanying drawings, other features and advantages of the utility model will become clearer.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of an embodiment of a VR head-mounted display proposed by the present invention;

Fig. 2 is a schematic diagram of a partial structure in an embodiment of a VR head-mounted display proposed by the present invention;

Fig. 3 is a schematic circuit diagram of an embodiment of the VR head-mounted display proposed by the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should also be noted that the orientation terms such as left, right, up, and down in this embodiment are only relative concepts or refer to the normal use state of the product, and should not be regarded as limiting.

Embodiment one

For a VR head-mounted display with an infrared lens, its working principle is: there are multiple infrared lights on the VR peripheral (such as a game handle), which can emit infrared light in the sensitive band of the infrared lens. The lens captures the infrared light emitted by the infrared lamp, and uses the captured infrared light to locate the VR peripheral, and then captures the shape and action of the VR peripheral. The infrared light in the sensitive band of the infrared lens is also the positioning infrared light. The VR head-mounted display uses the infrared lens to directly receive infrared light signals of all frequency bands in the external environment. Although the infrared lens only senses infrared light in its sensitive bands better, since the VR system also has a TOF module that can emit infrared light and natural Infrared light, etc. that exist in the camera, and then multi-channel superimposed infrared light will also interfere with the infrared lens after entering the infrared lens, so it will blur the shape of the captured VR peripherals, resulting in problems with the positioning accuracy of the handle. Based on this, This embodiment proposes a VR head-mounted display, as shown in Figure 1, including a body 11 and an infrared lens 12, the VR head-mounted display also includes an infrared sensor 13, an infrared interference suppression module 14, and an infrared emitting device 16; the body 11 There is an assembly port 110 on the front end surface, and the infrared lens 12 is assembled in the assembly port 110. Ideally, the infrared lens 15 is isolated from external light, and the infrared sensor 13 is arranged at the mouth of the assembly port 110, and the photosensitive surface of the infrared sensor 13 Facing the outside of the assembly port 110, it is used to receive infrared light and convert the received infrared light into an electrical signal and send it; the infrared interference suppression module 14 is used to receive the electrical signal sent by the infrared sensor 13 and filter the received electrical signal to obtain the electrical signal corresponding to the infrared light in the sensitive band of the infrared lens; and generate a driving signal to drive the infrared emitting device 16 to emit infrared light according to the electrical signal corresponding to the infrared light in the band, and the infrared lens 12 is used to receive the infrared emitted by the infrared emitting device 16 Light. Preferably, the light-emitting surface of the infrared emitting device 16 faces the photosensitive surface of the infrared lens 12 , so the infrared light emitted by the infrared emitting device 16 can be better collected by the infrared lens 12 . The VR head-mounted display of this embodiment blocks the entry of light from the external space by building an infrared lens, avoiding it from directly receiving external ambient light, and effectively suppressing the interference of reflected infrared light and useless infrared in external space. For the collection of light, in this embodiment, an infrared sensor, an infrared interference suppression module, and an infrared emitting device are arranged, wherein the infrared sensor detects the infrared light of the full band in the external space and performs photoelectric conversion to obtain the electrical signal corresponding to the infrared light of the full band. Signal, after the electrical signal corresponding to the infrared light of the whole band is filtered by the infrared interference suppression module, only the electrical signal corresponding to the infrared light in the sensitive band of the infrared lens is retained, and the filtered electrical signal is generated into a driving signal to drive the infrared emission The device generates infrared light in the sensitive band of the infrared lens, which realizes the electro-optic conversion, and finally the generated infrared light is received by the infrared lens. Since the interference suppression module can filter out the electrical signal of the infrared light except for the sensitive band of the infrared lens, Effectively suppress the interference of reflected infrared light and space useless infrared. The filtered electrical signal is the electrical signal corresponding to the infrared light in the sensitive band of the infrared lens, and its intensity reflects the intensity of the positioning infrared light. Conversion, only emits infrared light in the sensitive band of the infrared lens, which greatly improves the purity of the positioning infrared light and effectively improves the positioning accuracy. In addition, by building the infrared lens inside, it can protect the infrared lens and ensure the safety of the infrared lens. The cleanness of the photosensitive surface makes the life of the lens longer and effectively enhances the competitiveness of the product.

Since the infrared lens 12 is based on the principle of infrared sensitivity, whether there is visible light in the main body has no effect on it. Therefore, the airtight environment enables it to collect more pure infrared light.

Wherein, the infrared lens 12 may be a CCD lens or a CMOS lens that is only sensitive to infrared light.

As a preferred embodiment, the infrared interference suppression module in this embodiment includes an amplifier circuit, a filter circuit, and a shaping circuit, and the amplifier circuit, the filter circuit, and the shaping circuit are arranged on the circuit board 17, and the infrared sensor is connected with the amplifier circuit, and the amplifier circuit will The detection signal of the infrared sensor is amplified and sent to the filter circuit for filtering out the electrical signal corresponding to the infrared light other than the sensitive band of the infrared lens 12, and generates a driving signal after being shaped by the shaping circuit to drive The infrared emitting device emits infrared light in the sensitive band of the infrared lens.

The circuit board 17 is embedded in the assembly port 110, preferably the area of the circuit board 17 is not less than the area of the assembly port 110, and is used to block the assembly port 110, so that the CCD infrared lens 12 can be isolated from the external light, which is the infrared lens 12 To provide an ideal photosensitive environment, of course, the utility model is not limited to using the circuit board 17 to seal the assembly opening, and other structural sealing methods can also be used, all of which belong to the protection scope of the utility model.

In order to facilitate the circuit board 17 to block the assembly opening 110, the circuit board 17 is preferably made of a PCB board, which is made of hard material and has certain strength and compression resistance.

Preferably, there are multiple infrared sensors 13, one infrared interference suppression module and one infrared emitting device.

Since the position of the gamepad cannot be predicted in advance, when there are multiple infrared sensors 13, it is preferable that the multiple infrared sensors 13 are evenly arranged around the assembly port 110, so that the infrared light in the external space can be evenly received. In order to protect the infrared sensor 13 , preferably a protective cover is provided outside the infrared sensor 13 at the opening of the assembly port 110 , and the protective cover should be able to transmit infrared light.

As shown in Figure 2, a specific implementation circuit schematic diagram is exemplified in this embodiment. The amplifying circuit includes a PNP transistor Q1 and an NPN transistor Q2. The base of the PNP transistor Q1 is connected to the infrared sensor OPT, and the emitter is connected to the DC The power supply VCC is connected, the collector is connected to the base of the NPN transistor Q2, the collector of the NPN transistor Q2 is connected to the DC power supply VCC, and the emitter is connected to the ground terminal. The amplifying circuit is also connected with current-limiting resistors R3, R4, and R5, and the amplifying circuit is used for amplifying and processing the signal collected by the infrared sensor OPT.

When there are multiple infrared sensors, the multiple infrared sensors are connected in parallel in the circuit.

The filtering circuit is a band-pass filtering circuit composed of a high-pass filtering circuit and a low-pass filtering circuit. As shown in Figure 2, it is mainly composed of high-pass filter circuit capacitor C2 and resistor R6, and low-pass filter circuit R7 and C3. The shaping circuit is preferably realized by a Schmitt trigger.

Infrared emitting device 16 infrared light-emitting diodes realize, preferably, it can adopt the diode consistent with the infrared lamp that is provided with on the game handle, as shown in Figure 3, infrared emitting device 16 is that infrared light-emitting diode D1 can emit infrared lens 12 sensitive frequency bands of infrared light.

In this embodiment, take the infrared lens 12 as an example that is sensitive to the infrared carrier of 38KHZ to illustrate, as shown in the accompanying drawing 3, the circuit workflow is as follows:

When the VR system is working, there are 38KHZ infrared carrier waves emitted by VR peripherals (such as gamepads) in the space, and the reflected 60KHZ infrared carrier waves emitted by the TOF transmitter module and space useless infrared light are combined and enter the infrared sensor. Perform optical-electrical conversion, and the electrical signal converted from high-frequency infrared clutter is filtered by bypass capacitor C1, and the electrical signal of other combined infrared light enters the 38KHZ band-pass (multi-order ) filter, 60KHZ and space useless infrared light is filtered out, and then the 38KHZ infrared carrier passes through the Schmitt trigger U1 for waveform shaping, and then U1 drives the NMOS tube Q3 to conduct (U1 has no action when there is no useful signal), and the infrared emission Tube D1 works to emit pure 38KHZ infrared light, and the CCD infrared lens inside the VR body receives the pure 38KHZ infrared light, thereby realizing precise motion capture and positioning of VR peripherals.

In addition, the infrared sensor is placed on the front face of the VR body 11 in parallel by setting multiple array patterns so that it is more conducive to receiving infrared light from multiple directions. The number should also be set to multiple arrays of parallel modules (such as forming a circle around the internal camera lens) so that the photosensitive infrared sensor can receive infrared at a wider angle and receive multiple infrared lights.

Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above-mentioned examples, and those of ordinary skill in the art make changes, modifications, additions or replacements within the essential scope of the present utility model. It should also belong to the protection scope of the present utility model.

Claims (10)

1. a kind of VR head-mounted displays, it is characterised in that the infrared lens including body and installed in the body interior, institute Stating VR head-mounted displays also includes infrared sensor, Infrared jamming suppression module and infrared launcher；

Installation opening is provided with the front end face of the body, the infrared sensor is arranged on the oral area of the installation opening, and described The photosurface of infrared sensor is towards the outside of installation opening, for receiving infrared light and the infrared light received being converted into telecommunications Number and send；

The Infrared jamming suppression module is used to receive the electric signal that the infrared sensor is sent and the electric signal of reception is entered Row filtering process, obtain electric signal corresponding to the infrared light of sensitive band；And the electric signal according to corresponding to the infrared light of the wave band Produce drive signal and drive the infrared launcher transmitting infrared light；

The infrared lens are used for the infrared light for receiving the infrared launcher transmitting.

2. VR head-mounted displays according to claim 1, it is characterised in that the infrared lens be CCD camera lenses or CMOS camera lenses.

3. VR head-mounted displays according to claim 1, it is characterised in that the Infrared jamming suppression module includes amplification Circuit, filter circuit, shaping circuit, the amplifying circuit, filter circuit and shaping circuit are set on circuit boards, described red Outer sensor is connected with the amplifying circuit, and the detection signal of the infrared sensor is amplified by the amplifying circuit, and Send to the filter circuit, for filtering out electric signal corresponding to the infrared light in addition to the sensitive band, and pass through institute Drive signal is produced after stating the shaping of shaping circuit, drives the infrared launcher to launch the infrared light of the sensitive band.

4. VR head-mounted displays according to claim 3, it is characterised in that the circuit board insertion is arranged on the assembling It is intraoral, and the area of the circuit board is not less than the area of the installation opening, for the installation opening to be blocked.

5. VR head-mounted displays according to claim 4, it is characterised in that the circuit board is pcb board.

6. according to the VR head-mounted displays described in claim any one of 1-5, it is characterised in that the infrared sensor has more Individual, the Infrared jamming suppression module and the infrared launcher are one.

7. VR head-mounted displays according to claim 6, it is characterised in that when with multiple infrared sensors, this is more Individual infrared sensor is uniformly laid in around the installation opening.

8. according to the VR head-mounted displays described in claim any one of 3-5, it is characterised in that the amplifying circuit includes one PNP triode and a NPN triode, the base stage of the PNP triode are connected with the infrared sensor, emitter stage and direct current Source is connected, and colelctor electrode is connected with the base stage of the NPN triode, and the colelctor electrode of the NPN triode is connected with dc source, hair Emitter-base bandgap grading connects ground terminal.

9. VR head-mounted displays according to claim 8, it is characterised in that the shaping circuit is Schmidt trigger.

10. VR head-mounted displays according to claim 9, it is characterised in that the filter circuit is high-pass filtering electricity Road and the bandwidth-limited circuit of low-pass filter circuit composition.