198 results about "Helmet-mounted display" patented technology

A helmet mounted display 30 includes a display source 31 arranged to be directly imaged by a primary relay optical arrangement 32 having relay optical elements 33A, 33B and 33C. Light exiting the primary relay optical arrangement 32 indicated by ray traces 34A, 34B and 34C continue towards a visor 35 which is arranged to reflect incident light to a exit pupil located in a convenient position for a viewer 36.

The display source 31 includes a light source, beam splitter, reflective liquid crystal display and a display source relay optical arrangement to provide an output image at an output diffuser screen. The image at the output screen is then directly imaged by the primary relay optical arrangement 32.

Should the reflective liquid crystal display require modification or replacement with a newer model, then the display source 31 can be redesigned to accommodate the new reflective liquid crystal display rather than re-engineering the primary relay optical arrangement 32 at greater expense.

Various embodiments involving structures and methods for illumination can be employed, for example, in projectors, head-mounted displays, helmet-mounted displays, back projection TVs, flat panel displays as well as other optical systems. Certain embodiments may include prism elements for illuminating, for example, a spatial light modulator. Light may be coupled to the prism in some cases using fiber optics or lightpipes. The optical system may also include a diffuser having scatter features arranged to scatter light appropriately to produce a desired luminance profile. Other embodiments are possible as well.

The present invention provides a welding protection helmet with video frequency augmented reality auxiliary operation. The helmet comprises the welding protection helmet, a binocular high dynamic range video camera, a helmet display, a video frequency input-output device, a potable computer, a protective glass, a fan, a mike, a microphone and a respiration device. With the present invention, welding is carried out by observing the video frequency of the helmet display, which avoids the harm caused by watching welding directly or indirectly. At the same time, in the present invention, the augmented reality technology is adopted, which can decrease the welder visual information insufficiency caused by various interferences produced by welding, and additional auxiliary information which is required for welding can also be added into welding at real time to guide welding. The present invention can be applied to the aspects of manual welding, mechanical welding with human participation, etc. and can also be applied to the mechanical processing and manufacturing aspects of cutting, polishing, etc.

Various embodiments involving structures and methods for illumination can be employed, for example, in projectors, head-mounted displays, helmet-mounted displays, back projection TVs, flat panel displays as well as other optical systems. Certain embodiments may include prism elements for illuminating, for example, a spatial light modulator. Light may be coupled to the prism in some cases using fiber optics or lightpipes. The optical system may also include a diffuser having scatter features arranged to scatter light appropriately to produce a desired luminance profile. Other embodiments are possible as well.

Various embodiments involving structures and methods for illumination can be employed, for example, in projectors, head-mounted displays, helmet-mounted displays, back projection TVs, flat panel displays as well as other optical systems. Certain embodiments may include prism elements for illuminating, for example, a spatial light modulator. Light may be coupled to the prism in some cases using fiber optics or lightpipes. The optical system may also include a diffuser having scatter features arranged to scatter light appropriately to produce a desired luminance profile. Other embodiments are possible as well.

The invention relates to compact optical arrangement for a helmet mounted display. The arrangement is well suited to use with spatial light modulators which require front illumination such as LCoS modulators but can also be adapted to rear illuminated devices such as LCD's and to self luminous devices such as OLEDs. The device uses polarization and reflection to make dual use of both volumes and lenses.

The invention relates to an eyepiece, in particular to an eyepiece used in a head-mounted display, belonging to the field of optical technique. The eyepiece is formed by six pieces of lenses, and a lens screen, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the observing side of human eyes and the display device side along the direction of an optic axis in a coaxial way; the exit pupil diameter of the eyepiece is larger than that of the common eyepiece, the eye relief is long, the angle of view field is large, and the focal distance and F/# are small; furthermore, illuminance of image plane is evener, so that the eyepiece especially meets the requirements of the head-mounted display.

An electromagnetic type multi-degree of freedom virtual roaming platform comprises a moving platform, a platform tilt actuating mechanism, a platform tilt perception system, two mats, a foot motion perception system, a corresponding flotation structure, a pressure sensor and the like, wherein the moving platform is composed of an array magnetic-driven unit, and the two mats are suspended on the platform and allow a user to directly tread. By means of the virtual reality technology, forward road situations and surrounding panoramic environments are displayed in real time on a helmet displayer or specific glasses of the user, and the user can select and move forward according to the situation. A control system can precisely control the mats so that the mats can bear the feet of the user to equivalently finish walking, running and other motions in the range of the platform, corresponding virtual scenes are changed synchronously according to the specific forwarding situations of the user to achieve the roaming effect. The user can move linearly on site on the platform and can turn left and right, particularly, real ground slope experience can be obtained through proper tilt of the platform.

The invention discloses a free-form surface goggles-based see-through helmet mounted display device. A pair of free-form surface goggles is arranged in front of a helmet body, wherein micro-display imaging devices and relay lens assemblies are arranged in front of the helmet body and on the two sides of the upper part of the free-form surface goggles respectively; the two relay lens assemblies are arranged at an inclination angle of 42 degrees; each relay lens assembly comprises a first relay lens, a second relay lens, a third relay lens, a fourth relay lens, a fifth relay lens and a sixth relay lens; and the first relay lens, the second relay lens, the third relay lens, the fourth relay lens, the fifth relay lens and the sixth relay lens are arranged in turn. In the device, a tire tread-shaped free-form surface is used for imaging, so the device can realize a large off-axis angle of 33 degrees, correct the aberration well and obviously improve the imaging quality and has a simple structure; the device is suitable to be arranged on a human head and conforms to the characteristic of man-machine efficacy; and by using the design of a short-focus large angle of view, the device has an exit pupil of between 12 and 15mm and an angle of view of between 40 and 50 degrees.

The invention discloses a display system of a light field helmet with a true stereo feeling. The display system comprises one or more display devices of the light field helmet, and each display device of the light field helmet comprises an optical rendering implementing module, a micro display device, a microstructure array device and an optical eyepiece system, wherein the micro display device, the microstructure array device and the optical eyepiece system are sequentially arranged. Beam splitting is conducted on the light emitted by different pixels of the micro display device through the microstructure array device, and then a space optical field is formed. By means of for the feature size p of an array, it is ensured that light beams formed by at least two pixels are different in direction. Through the method, the dense space light field conforming to the human eye natural vision can be provided, the space light field is changed through the optical eyepiece system and can be generated only in an exit pupil of an optical eyepiece, and in other words, the view area of the light field display system is controlled within a range capable of being observed by a single eye; thus, the problem that aggregation and convergence of the human eyes are inconsistent in the helmet display is solved.

The invention discloses a control method and a control device on the basis of virtual reality. The control method includes displaying virtual terminals in virtual reality scenes; receiving operation information in the virtual reality scenes; executing operation on the virtual terminals. The operation information is used for indicating operation detected on physical terminals. The operation executed on the virtual terminals is indicated by the operation information. The control method and the control device have the advantage that the technical problem of low control efficiency due to the fact that control objects in existing virtual reality scenes are controlled by means of operating helmet-mounted displays in the prior art can be solved by the aid of the control method and the control device.

The invention relates to automatic field depth blending strengthening display method and system based on eye movement tracking. The method comprises step (1) of obtaining eye movement tracking and background image data by adjusting an eye movement camera; step (2) of displaying automatic field depth blending, specific steps thereof are as follows: generating a primary training database; converting probability distribution information; inquiring the database; converting field depth and focus data; estimating pose; blending virtual and actual scenes; and romancing images. The system comprises an eye movement wireless CCD camera arranged on a helmet, a background wireless CCD camera and a microprocessor which is provided with a wireless receiver. The CCD camera adopted by the invention takes eye movement images and background images, and can carry out comparison matching tracking between the eye movement data taken in real time and synchronously taken background image data according to the training information of the field depth and the eye movement to adjust focus degree of image displayed by a transparent helmet display, thus realizing automatic focusing and strengthening display.

The invention discloses a virtual reality aircraft cockpit system with force/haptic feedback, namely, a flight simulator which uses a helmet mounted display, a motion tracking sensor and a force/haptic feedback system to replace a physical cockpit and a control mechanism of a conventional flight simulator and takes a virtual reality technology as a man-machine interaction mode. The virtual reality aircraft cockpit system is composed of computers and corresponding virtual reality interface equipment, adopts a network based distributed structure and takes the computers as a computing nodes, and different computing nodes perform communication through the network; motion data is acquired through the motion tracking sensor, the helmet-mounted display is taken as visual feedback equipment to output a virtual scene, and the force/haptic feedback system provides real force/haptic feedback for a user. Compared with the traditional flight simulator, the virtual reality aircraft cockpit system is small in size and low in cost, has high flexibility in structure and function, and can realize good force/haptic feedback experience, so that better immersion and interactivity are acquired.

The invention discloses an onboard goggle-type helmet display optical system, and provides a large-field optical display system. The optical display system comprises an image source, a relay lens assembly, a prism assembly and a concave surface reflector along optical axis direction in sequence, wherein, the concave surface reflector receives and reflects image light of the image source from the prism assembly; the concave surface reflector has a bending angle corresponding to the image source, thus asymmetric astigmation is generated in the reflection image; the bending angle is defined as an included angle between an optical axis and a normal line of each point of the inner surface of the concave surface reflector; the relay lens assembly is composed of three groups of a front group, a middle group and a rear group; each group respectively comprises a plurality of lens; the front group closes to the prism assembly, the rear group closes to the image source, and the middle group is positioned between the front group and the rear group in the optical axis direction; the three groups of the front group, the middle group and the rear group can be respectively used as a whole to translate and rotate to form a crossing angle between the local area shafts of the front group lens, the middle group lens and the rear group lens, thus compensating the asymmetric astigmation of the optical display system.

The invention belongs to the field of medical equipment, relating to an operation guiding system and method based on an optical enhancement reality technology. The method comprises the steps of: displaying optical lattice generated by a computer on a display screen of an optical helmet display; shooting a calibration plate and the optical lattice through the display screen by a camera; recognizing the optical lattice and colour calibration points in the shot digital image and acquiring two-dimension coordinates of the optical lattice and colour calibration points by the computer; calculating mapping of the three-dimensional space of the calibration points to the two-dimensional space of an imaging surface of the optical helmet display to complete the calibration; and drawing corresponding virtual information according to the required mapping, and displaying the information on the display screen of the optical helmet display to realize the enhancement of operation scene. The invention can well support the application of the enhancement reality technology to the operation guiding system.

For a helmet-mounted imaging system to be multi-purpose, effective, lightweight, and easy to use, it must be designed with the most advanced technologies, interchangeable and expandable for future upgrades. The Interchangeable Donut Helmet concept achieves this ability through the use illustrated in FIG. 1 of Section 5. These connected modules are attached around the perimeter of the helmet. An adjustable tensioner insures compatibility and a snug fit on similar helmets (FIG. 2). Each donut module is designed for a different use such as imaging camera, battery source, global positioning, or wireless transmitter. Images are transmitted wirelessly via radio frequencies (RF) (FIG. 3). A Helmet-Mounted Display (HMD) is incorporated on the front donut module in order for the wearer to view the camera image (FIG. 4). Each donut module consists of subsystems that incorporate low cost, lightweight and low power technologies. This provides the realization of a head-borne, low power and cost effective imaging system. Modularity promotes interchangeability that is simple and capable of various system configurations depending on the task. This system concept has firefighter and military applications.

The invention relates to HMD virtual visual delay compensation system and working procedure, based on the body surface electromyography information, belongs to virtual reality technology. The system includes collecting electrode, reference electrode, collection equipment of multi-channel surface electromyography information, computers, HMD.The work steps of the system are: place electrode on the neck of operator, and make signal amplification and filtering connecting with multi-channel surface electromyography information collection devices, put the digital signal treatment into the computer, first initial calibration procedures by the computer, by we can initially study the typical head movement according to voice prompt, then move the head to forecast operating procedures in the virtual HMD visual signal delay compensation, while tracking data with the original data integration, improving accuracy of head tracking. The characteristic of this invention is small in size, light weight, strong predictive power, and high sensitivity.