CN113253454A - Head-mounted display device and manufacturing method thereof - Google Patents
Head-mounted display device and manufacturing method thereof Download PDFInfo
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- CN113253454A CN113253454A CN202010086874.9A CN202010086874A CN113253454A CN 113253454 A CN113253454 A CN 113253454A CN 202010086874 A CN202010086874 A CN 202010086874A CN 113253454 A CN113253454 A CN 113253454A
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
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- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
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Abstract
The invention discloses a head-mounted display device and a manufacturing method thereof, and relates to the technical field of display devices. The main technical scheme of the invention is as follows: the head-mounted display device comprises a body, a plurality of micro displays, a plurality of micro lenses and a processor, wherein the body is movably worn on the head of a wearer; the micro-displays are arranged on the body to form a micro-display matrix, and each micro-display is used for displaying a partial image of a preset image so as to splice the partial images into the preset image; the micro lenses correspond to the micro displays one by one and are mutually attached, and each micro lens is used for projecting the partial image in parallel; each micro lens and the corresponding micro display form a micro display unit, and the view angles of the adjacent micro display units are connected with each other and used for connecting the edges of the partial images projected in parallel with each other; the processor is arranged on the body and is connected with the micro-display signals and used for sending image signals to the micro-displays.
Description
Technical Field
The invention relates to the technical field of display equipment, in particular to head-mounted display equipment and a manufacturing method thereof.
Background
Virtual Reality (VR) and Augmented Reality (AR) are high and new technologies appearing in recent years, and both simulation of senses such as vision, hearing, touch and the like and combination with Reality are provided for a user through a computer technology.
However, the conventional head glasses generally adopt a projection structure (OLED or LCOS) to optically couple into the near-eye imaging system and then enlarge the viewing angle through an optical structure (lens), but since the projection structure itself has a large structural size and is limited by the relationship between the focal length and the viewing angle of the optical structure, an optical structure having a large focal length is required if a large viewing angle is required, so that the overall thickness and weight of the head glasses are further increased, and it is difficult to realize large-viewing-angle display in a small device space.
Disclosure of Invention
In view of this, embodiments of the present invention provide a head-mounted display device and a manufacturing method thereof, and mainly aim to solve the problems that the existing head-mounted glasses achieve a large view field effect, so that the overall thickness and weight of the head-mounted glasses are increased, and the wearing comfort is poor.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
an embodiment of the present invention provides a head-mounted display device, which includes
A body for removable wearing on a wearer's head;
the micro-displays are arranged on the body to form a micro-display matrix, and each micro-display is used for displaying a partial image of a preset image so as to splice the partial images into the preset image;
the micro lenses are arranged on one side of the micro displays facing the eyes of the wearer, the micro lenses and the micro displays are in one-to-one correspondence and are mutually attached, and each micro lens is used for projecting the partial image in parallel; and each microlens and its corresponding microdisplay form a microdisplay unit, the field angles of adjacent microdisplay units are connected to each other for connecting the edges of the partial images projected in parallel to each other;
the processor is arranged on the body and is connected with the micro-display signals and used for sending image signals to the micro-displays.
Optionally, in the head-mounted display device, a plurality of the microlenses are convex lenses;
the micro display in each micro display unit is positioned on a focal plane of the micro lens in a first direction;
wherein the first direction is a direction pointed by a wearer's eye toward the head mounted display device.
Optionally, in the head-mounted display device, the body is provided with 3 micro display unit matrices, each display unit matrix includes a plurality of micro display units, and the viewing angles of the 3 display unit matrices are the same as the preset image;
wherein the microdisplays in each of the display matrices display only one of the colors red, green, and blue.
Optionally, the head-mounted display device further comprises a display unit, wherein each of the micro display units has a field angle of
Theta＝2*actan(d0/2f) (equation 1)
Wherein d is0Is a panel width of the microdisplay; f is the focal length of the micro lens; theta is the angle of the emergent beam of the micro-display unit, namely the angle of the field of view.
Optionally, the head-mounted display device, wherein the distance between the centers of the adjacent microlenses is
Lelen × tan (theta) (formula 2)
Where le is the exit pupil distance; theta is the angle of the emergent light beam of the micro-display unit, namely the angle of the field of view; and the Llens is the distance between the centers of the adjacent micro lenses.
Optionally, the head mounted display device as described above, wherein a distance between centers of adjacent said microdisplays is
Long ═ (le + f) × (theta) (equation 3)
Where le is the exit pupil distance; f is the focal length of the micro lens; theta is the angle of the emergent light beam of the micro-display unit, namely the angle of the field of view; and Loled is the distance between the centers of adjacent microdisplays.
Optionally, the head-mounted display device further comprises a micro display unit, wherein each micro display unit is arranged in a micro display unit, and the micro display unit is arranged in a micro display unit which belongs to the same micro display unit
shift is long-Llens (formula 4)
Wherein Loled is the distance between centers of adjacent microdisplays; the Llens is the distance between the centers of the adjacent micro lenses; shif is the position offset of each microdisplay relative to the center of the microlens in the same microdisplay unit as the microdisplay.
In another aspect, the present invention provides a method for manufacturing a head-mounted display device, including the following steps:
determining the field angle of a preset image;
determining the field angle of the micro display units, and calculating the preset number of the micro display units;
determining the distance between the centers of the adjacent microlenses in the adjacent micro display units according to the field angle of the micro display units;
determining the distance between the centers of adjacent microdisplays in the adjacent microdisplay units according to the field angle of the microdisplay units;
the micro lenses and the micro displays are in one-to-one correspondence and are mutually attached to form a micro display unit;
and installing a preset number of micro display units on a head-mounted display device body according to the distance between the centers of adjacent micro lenses in the adjacent micro display units, and connecting the preset number of micro displays with a processor through signals.
Optionally, the method of determining the field angle of the micro-display unit and calculating the number of the micro-display units comprises
According to Theta 2 actan (d)0/2f) (equation 1)
Calculating a field angle of the micro-display unit;
dividing the preset image field angle by the micro-display unit field angle to obtain a preset number of micro-display units, and sequentially arranging a preset number of rows/columns of the micro-display units along a second direction to form a display unit matrix;
wherein the second direction is perpendicular to a first direction, and the first direction is a direction in which the head-mounted display device points to the eyes of a wearer;
wherein d is0Is a panel width of the microdisplay; f is the focal length of the micro lens; theta is the angle of the emergent beam of the micro-display unit, namely the angle of the field of view.
Optionally, in the foregoing method for determining the distance between the centers of the adjacent microlenses in the adjacent microdisplay units according to the field angle of the microdisplay units, the method includes
According to the formula 2. lelen × tan (theta)
Calculating the distance between the centers of the adjacent micro lenses;
where le is the exit pupil distance; theta is the angle of the emergent light beam of the micro-display unit, namely the angle of the field of view; and the Llens is the distance between the centers of the adjacent micro lenses.
Optionally, in the foregoing method for determining a distance between centers of adjacent microdisplays in adjacent microdisplay units according to the field angle of the microdisplay units, the method includes
According to Loled ═ (le + f) x tan (theta) (equation 3)
Calculating the distance between the centers of the adjacent micro displays in the adjacent micro display units;
where le is the exit pupil distance; f is the focal length of the micro lens; theta is the angle of the emergent light beam of the micro-display unit, namely the angle of the field of view; and Loled is the distance between the centers of adjacent microdisplays.
Optionally, in the method for forming the micro display unit by one-to-one correspondence between the plurality of microlenses and the plurality of microdisplays and attaching the microlenses and the microdisplays to each other, the method includes:
and attaching the microdisplay to the micro lens at the position of the focal plane of the micro lens, and attaching the microdisplay and the micro lens through a transparent material.
The head-mounted display equipment and the manufacturing method thereof provided by the embodiment of the invention at least have the following beneficial effects: in order to solve the problems that the existing head-wearing glasses realize a large view field effect, the whole thickness and weight of the head-wearing glasses are increased, and the wearing comfort level is poor, the head-wearing display equipment provided by the invention realizes splicing of a plurality of partial images into a preset image by arranging a plurality of micro-displays forming a matrix, simultaneously, each micro-display corresponds to a micro-lens to parallelly project the partial images, and the edges of the adjacent partial images are ensured to be mutually connected while projecting, so that the splicing display of the preset image is completed; the micro lenses are small in focal length and thickness, so that the thickness and weight of the head-mounted display device can be greatly reduced, and meanwhile, the field of view amplification degree of the preset images by the micro lenses is higher than that of the prior art; the head-mounted display equipment provided by the embodiment of the invention can ensure the large-field display of the preset image and compress the size of the head-mounted display equipment.
Drawings
Fig. 1 is a schematic view of an optical angle tiled display principle of adjacent micro-display units in a head-mounted display device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a three-color view field overlapping display in a head-mounted display device according to an embodiment of the present invention;
fig. 3 is a schematic view of an application scenario of a head-mounted display device in an AR device according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a method for manufacturing a head-mounted display device according to an embodiment of the present invention;
in the figure: microdisplays 1(11, 12), microlenses 2(21, 22), microdisplay units 3(31, 32), real objects 4, virtual objects 5.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of a head-mounted display device according to the present invention with reference to the accompanying drawings and preferred embodiments shows the following detailed descriptions. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In order to solve the technical problems, the embodiment of the invention has the following general idea:
example 1
Referring to fig. 1, the present invention provides a head-mounted display device, which includes a body, a plurality of microdisplays 1, a plurality of microlenses, and a processor; the body is used for being movably worn on the head of a wearer; the micro displays 1 are arranged on the body to form a micro display matrix, and each micro display 1 is used for displaying a partial image of a preset image so as to splice the partial images into the preset image; the micro lenses 2 are arranged on one side of the micro displays 1 facing the eyes of the wearer, the micro lenses 2 correspond to the micro displays 1 one by one and are mutually attached, and each micro lens 2 is used for projecting the partial image in parallel; and each said microlens 2 forms a micro display unit 3 with its corresponding micro display 1, the angle of view of adjacent said micro display units 3 is joined to each other, used for joining the edge of said some pictures projected in parallel to each other; the processor is arranged on the body and is in signal connection with the micro-display 1 and used for sending image signals to the micro-display 1.
Specifically, in order to solve the problems that the existing head glasses realize a large field of view effect, so that the overall thickness and weight of the head glasses are increased and the wearing comfort is poor, an embodiment of the invention provides a head-mounted display device, which comprises a body, a plurality of micro displays 1, a plurality of micro lenses 2 and a processor; the finished preset images are spliced by respectively displaying partial images of the preset images through the micro displays 1 (for example, each micro display 1 displays a finger and finally splices and displays the whole hand), and then each partial image is parallelly projected through the micro lenses 2 which are in one-to-one correspondence with the micro displays 1, so that large-field-of-view display of the preset images is realized, the mutual connection of the field angles of the adjacent micro display units 3 is ensured, the mutual connection of the edges of each projected partial image is further realized, and the perfect splicing of the projected preset images is ensured.
The body is a structure with a hooking or covering function, and in this embodiment, the body can be a helmet, a glasses frame or the like, as long as the head-mounted device can be worn on the head of a wearer; the whole head-mounted device is the VR/AR glasses, and the structure known to those skilled in the art is not limited to this.
In the present embodiment, the microdisplays 1 may be configured as any type of Display, such as an organic light-emitting diode (OLED) Display, a Liquid Crystal On Silicon (LCOS) Display, a Liquid Crystal Display (LCD), a micro LED, and a mini LED; the micro display 1 is in a regular hexagon shape, a regular quadrangle shape, a round shape or any other shape; the microdisplays 1 are each connected to the processor by a signal (either wired or wireless, e.g., bluetooth), and receive image information from the processor, display the corresponding partial image, and display a monochrome partial image or a color partial image. The processor is a programmable processor with data receiving, sending, processing, analyzing, comparing and controlling functions, and is a structure well known to those skilled in the art, and not limited herein, in this embodiment, only one processor may be provided, and the processor is in signal connection with a plurality of microdisplays 1 at the same time to send the partial image information to each microdisplay, and a processor may be provided corresponding to each microdisplay 1, so as to avoid a failure of one processor, and other processors may also operate, and the preset image may also be displayed in most parts.
The plurality of microlenses 2 are microlenses with image magnification and parallel projection functions, and in the embodiment, the microlenses can be set as micro convex lenses, the focal length is small (for example, 2-3mm) so as to reduce the thickness and weight of the head-mounted device, and the aperture of the microlenses is not limited; the micro display 1 is arranged on a focal plane of one side of the micro lens 2, which is far away from the eyes of a wearer, so that the micro lens 2 is improved to parallelly project and present a partial image displayed by the micro display 1 corresponding to the micro display on the retina of a human eye, wherein the parallel projection is that the partial image displayed by the micro display 1 is projected after passing through the micro lens 2 and is a partial image which is an emergent ray and is a parallel ray; since the focal length of the micro lens 2 is small, the distance between the micro display 1 and the micro lens 2 is small, and the micro display 1 and the micro lens 2 can be attached to each other to form the integrated micro display unit 3, and certainly, the micro distance between the micro display 1 and the micro lens can be filled with fillers to attach the micro display unit and the integrated micro display unit, for example: transparent organic material or glass, i.e. not to obstruct the projection of the partial image of the microdisplay 1 by the microlenses 2.
According to the above list, the head-mounted display device provided by the invention realizes splicing of a plurality of partial images into a preset image by arranging a plurality of micro displays 1 forming a matrix, simultaneously, each micro display 1 corresponds to one micro lens 2 to parallelly project the partial images, and the edges of the adjacent partial images are ensured to be mutually connected while projecting, so that the splicing display of the preset image is completed; the micro lenses 2 are small in focal length and thickness, so that the thickness and weight of the head-mounted display device can be greatly reduced, and meanwhile, the field of view amplification degree of the preset images by the plurality of micro lenses 2 is higher than that of the prior art; the head-mounted display equipment provided by the embodiment of the invention can ensure the large-field display of the preset image and compress the size of the head-mounted display equipment.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, with the specific understanding that: a and B can be contained simultaneously, A can exist independently, B can exist independently, and any one of the three conditions can be met; wherein the inside and outside are referenced to the inside and outside in the actual installation.
Further, as shown in fig. 2, an embodiment of the invention provides a head-mounted display device, in which in a specific implementation, the field angle of each micro-display unit 3 is
Theta＝2*actan(d0/2f) (equation 1)
Wherein d is0Is the panel width of the microdisplay 1; f is the focal length of the microlens 2; theta is the angle of the emergent beam of the micro-display unit 3, i.e. the angle of field.
Specifically, for human eyes, parallel light with a certain beam width and the same angle enters the human eyes, is focused on one point on a retina after being converged by a crystalline lens, and incident parallel light rays with different angles are converged on different position points on the retina, so that the parallel light rays emitted by different micro-display units 3 can be angularly connected to realize near-to-eye angle splicing display by reasonably controlling the angles of the incident parallel light rays; in order to realize mutual engagement of the viewing angles of adjacent micro-display units 3, it is necessary to ensure that the angles of adjacent outgoing light rays of adjacent micro-displays 1 are the same, for example: in fig. 1, the exit angle at the lower side of the micro display unit 31 composed of the micro display 11 and the micro lens 21 is α 1 (the reference is the horizontal center line of the micro lens 21, i.e. the line perpendicular to the focal plane of the micro lens 21 and passing through the center of the micro lens 21, and the reference of the micro display unit 3 related in the following description is the horizontal center line of the corresponding micro lens 2), and is equal to the exit angle α 2 at the upper side of the micro display unit 32 composed of the micro display 12 and the micro lens 22, i.e. the two exit light beams are parallel to each other, so that the imaging positions of the two on the retina of a human eye are overlapped, thereby realizing angle splicing and mutual connection of partial image edges; at least two ways of achieving the angle connection or the image edge connection are possible, which will be described in detail below with reference to fig. 1:
the first method comprises the following steps: the micro display units 31, 32, etc. on the main body are all set to the same size, i.e., the panel width d of the micro displays 11, 12, etc0The focal lengths f (for example, 2-3mm) of the microlenses 21, 22 and the like are equal, so that the emergent light angles of the microdisplay units 31, 32 and the like are equal according to the formula (1), and at this time, after the position of the microdisplay unit 31 is determined, the microdisplay unit 32 and the like are translated relative to the microdisplay unit 31 until the edge angles of the adjacent microdisplay units 3 are equal; for example, the emergent light angles of the micro display units 31 and 32 are all 4 degrees, when the partial image projected by the micro display unit 31 covers-2 degrees to 2 degrees, the partial image projected by the micro display unit 32 needs to be overlapped with the partial image at-2 degrees or 2 degrees, so that the angle connection can be completed, and meanwhile, the projected image edges are also ensured to be connected with each other, the other micro display units 3 are translated in the same manner, of course, the translation directions are all translated in the horizontal and vertical directions, and the translation distances are the same to form a matrix, for example: if the angle of view of the final image is required to be 60 degrees and the angle of view of each micro-display unit 3 is required to be 4 degrees, the number of micro-display units 3 in the same direction is 15, and a matrix of 15 × 15 micro-display units 3 should appear in the head-mounted display device.
The translation distance includes a translation distance of the micro display unit 32 relative to the micro display unit 31, and the translation process requires both translation of the micro lens 22 relative to the micro lens 21 and translation of the micro display 12 relative to the micro lens 22, so as to ensure the outgoing ray angle and overlap of the micro display 12, and therefore the outgoing ray angle of each micro display unit 3 needs to be obtained according to the formula 1, and then the calculated outgoing ray angle is calculated according to the formula 1
Lelen × tan (theta) (formula 2)
Long ═ (le + f) × (theta) (equation 3)
shift is long-Llens (formula 4)
And calculating the translation amount.
Specifically, referring to fig. 1, the translation distance of the microlens 22 relative to the microlens 21 is Llens, i.e. the distance between the center of the microlens 22 and the center of the microlens 21, the exit angle of the lower side of the micro-display unit 31 composed of the micro-display 11 and the microlens 21 is α 1, and the micro-display unit 32 keeps angle connection, so α 2 ═ BCE ═ 2 α 1 if α BCE ═ Theta 1 if BCD ═ α 2 if BCD ═ α 1, AF parallel CD (both are the center lines of the microlens 2, and are necessarily parallel during translation) then AFC ═ FCD ═ 2 α 1, that is to say ═ FCD ═ 2 α 1 if BCE/2+ α 2, then the ratio of Llens to le is the tangent value of AFC ═ FCD, that is the pupil distance of the microlens, that is the distance between the pupil distance of the microlens 22 and the pupil 21, that is the distance of the common eye distance between the pupil distance of the person in the field and the person in the field, that is 20mm, adaptive adjustment design can be performed according to actual design requirements, and not limited too much), at this time, the tangent values of le and Theta are known, and then the translation distance of the microlens 32 relative to the microlens 31 can be obtained, and the microlenses 22 and the like adjacent to the microlens 21 are translated simultaneously in the horizontal and vertical directions by the same distance to form a matrix, so that the circumferential image edges of the microlens 21 can be connected; when the micro lens 22 is translated, the micro display 12 forming the micro display unit 32 is translated correspondingly, the center of the micro display 12 is taken as a reference point, the ratio of Loled to the sum of the lolens and the f is the tangent value of ═ AFG, namely the tangent value of Theta, the above contents are obtained, the value of the lolens and the tangent value of the Theta are known, and the Loled can be obtained at the moment, namely the translation distance of the center of the micro display 32 relative to the center of the micro display 11 is obtained; meanwhile, the translation distance of the microdisplay 31 relative to the microlens 22 can also be obtained according to the formula 4, referring to fig. 1, that is, the center of the microdisplay 11 is opposite to the center of the microlens 21, the distance between the center of the microdisplay 11 and the center of the microlens 22 in the translation direction is equal to the distance Llens between the center of the microlens 21 and the center of the microlens 22, the distance Loled between the center of the microdisplay 11 and the center of the microdisplay 12 minus the distance Llens between the center of the microdisplay 11 and the center of the microlens 22 in the translation direction, the distance shif between the microdisplay 12 and the center of the microlens 22 is obtained, and the corresponding microdisplays 22 and the like adjacent to the microdisplay 11 for forming a matrix are simultaneously translated in the horizontal and vertical directions by the same distance, so that the circumferential image edges of the microdisplay 11 can be connected. It should be noted that: the above calculation is an approximate calculation because the angle change and the translation distance are both minute amounts of change for the microlens 2 and the microdisplay 1, and can be considered to be approximately equal.
And the second method comprises the following steps: the micro display units 31, 32, etc. on the main body are set to different sizes, for example, the focal lengths f of the micro lens 21 and the micro lens 22, etc. are different, and the panel widths d of the micro display 11 and the micro display 12, etc. are the same0The micro lenses 21, 22 and the like are in the same plane, and the exit angle at the lower side of the micro display unit 31 composed of the micro display 11 and the micro lens 21 is α 1 (the reference is the horizontal center line of the micro lens 21, i.e. the line perpendicular to the focal plane of the micro lens 21 and passing through the center of the micro lens 21, and the reference of the micro display unit 3 referred to in the following description is the horizontal center line of the corresponding micro lens 2), and is equal to the exit angle α 2 at the upper side of the micro display unit 32 composed of the micro display 12 and the micro lens 22, so as to ensure that the image edges of the micro display unit 31 and the micro display unit 32 are connected with each other; the amount of translation of the microlens 22 and microdisplay 12 needs to be determined by a number of experimental adjustment positions.
It should be noted that: in both the first and second embodiments, the distance between the centers of the adjacent microlenses 2 is equal to or greater than the sum of the radii of the adjacent microlenses 2; the image magnification and parallel projection functions of the micro-lenses 2 are only related to the focal length and are not related to the diameter, so that the apertures of the adjacent micro-lenses 2 can be enlarged to be in contact with each other; the aperture of the micro-display can be reduced, referring to fig. 3, a gap is reserved between adjacent micro-lenses 2, the gap is used for entering external light, namely a solid line in fig. 3, to display an external real object, namely a real object 4, and a virtual object 5 displayed by the micro-display 1 is projected in parallel through the micro-lenses 2, namely a virtual object 5 is displayed by a dotted line in fig. 3, so that a mode of combining an image and the external real object in an AR product can be realized; as described above, when the microlens 2 is circular, the microlens 2 may have other shapes such as: regular hexagonAnd the shape of the micro lens 2 can be a regular hexagon or a square which can be closely connected if the size of the head-mounted display device is required to be small on the premise that preset images are consistent, and the shape of the micro lens 2 can be a common circle which can not be closely connected if the size of the head-mounted display device is required to be large, so that the display of the image shape is not influenced no matter what shape the micro lens 2 is selected. The shape of the microdisplay 1 determines the shape of the partial image. In this embodiment, the shape of the microdisplays 1 may be set to a shape that can be sealed, such as a regular hexagon or a square, so that a partial image displayed by each microdisplay 1 has a regular edge, and splicing can be easily achieved; of course, the shape of the microdisplay 1 may be other shapes, such as a circle, when the microdisplay 1 is in a circle, since the shape of the displayed image is a circle, if only the edges of adjacent circular images are connected to each other, only one point is connected to each other, and there is a gap between a plurality of partial images, which cannot form a complete preset image, and it is necessary to overlap a part of the field angles of adjacent microdisplay units 3, that is, the adjacent circular images projected in parallel are in an over-cut form, for example: the viewing angle of the micro-display unit 31 is-2 degrees to 2 degrees, and the viewing angle of the micro-display unit 32 is 1.5 degrees to 5.5 degrees. Panel width d of microdisplay 10It can be determined according to the shape of the microdisplay 1, for example: when the microdisplay 1 is regular hexagonal, d0The distance between two opposite sides in the regular hexagon is obtained, and the calculation mode is the same as the calculation method; when the microdisplay 1 is square, d0The side length of the square is the same as the calculation method; when the microdisplay 1 is rectangular, d0Then, two values, namely the length and the width of the rectangle, are corresponding to the horizontal and vertical directions, and the calculation mode is the same as the calculation mode at this time, but the translation distance needs to be calculated in the horizontal and vertical directions respectively.
Example 2
On the basis of embodiment 1, an embodiment of the present invention provides a head-mounted display device, in a specific implementation, 3 micro display unit matrices are disposed on the body, each display unit matrix includes a plurality of micro display units 3, and the viewing angles of the 3 display unit matrices are the same as the preset image;
wherein the microdisplays 1 in each of the display matrices display only one of the colors red, green and blue.
Specifically, since the single microlens 2 has chromatic aberration for light beams with different wavelengths (light with different colors), which causes degradation of the final display effect, in order to solve the chromatic aberration problem, in the present embodiment, three display unit matrices are disposed on the main body, which ensures that the preset image displayed by each display unit matrix is the same, and the angle of view is the same, and the color displayed by each display unit matrix is only red, green, and blue, so that a colorful and chromatic aberration-free preset image is finally formed on the retina of the wearer by overlapping, for example: the three display unit matrixes respectively display red hands, green hands and blue hands with the same field angle, and finally, the hands with full colors and no chromatic aberration are formed on the retinas of the wearer in an overlapped mode. Since R, G, B (red, green and blue) three-color parallel beams with a certain width and same angle are incident on human eyes, the beams with the same angle are coincided to be a point on the retina, it is thus possible in this embodiment to set up the microdisplays 1 displaying the same partial image in the form of R, G, B (red, green, blue) three monochrome displays, respectively, and to ensure that the field angles of the three microdisplays 1 are the same, the retina is overlaid to form a color portion image formed by superimposing three monochromatic colors R, G, B (red, green, blue), further, the R (red) microdisplay 1 matrix shows an overall red hand, the G (green) microdisplay 1 matrix shows an overall green hand, and the B (blue) microdisplay 1 matrix shows an overall blue hand, and finally, the retina of the wearer is overlaid to form a color rich and achromatic hand.
Wherein, the three display unit matrices may be three matrices that are separately arranged and separated, or three matrices that are alternately arranged as shown in fig. 2, where 4R (red) microdisplays 1 are one microdisplay matrix, 4G (green) microdisplays 1 are one microdisplay matrix, and B (blue) microdisplays 1 are one microdisplay matrix; the matrix is arranged in various forms, and only the same field angle of the microdisplays 1 in the display matrix of each color needs to be ensured, so that the matrix is not limited too much.
According to the above list, the present embodiment suppresses chromatic aberration of the conventional display system and reduces display chromatic aberration by separating the partial image of the microdisplay 1 into R, G, B (red, green, and blue) three-color images, and by using the microlens 2 to make the corresponding partial images enter the human eye at the same angle, i.e. the emergent light beams of the partial images are separately displayed in R, G, B (red, green, and blue) three colors, and finally are converged and superimposed on the retina to generate a complete image.
Example 3
Based on the head-mounted display device provided in embodiment 1 and embodiment 2, referring to fig. 4, this embodiment provides a manufacturing method, which includes the following steps:
101. determining the field angle of a preset image;
according to the product requirements of the head-mounted display device, the overall field angle of the preset image is determined, for example: 60 degrees.
102. Determining the field angle of the micro display units 3 and calculating the preset number of the micro display units 3;
this step and the following steps are according to the first implementation in embodiment 1:
according to Theta 2 actan (d)0/2f) (equation 1)
Calculating the angle of view of the micro-display unit 3, for example; 4 degrees;
dividing the preset image field angle by the micro-display unit field angle to obtain a preset number of micro-display units, and sequentially arranging a preset number of rows/columns of the micro-display units along a second direction to form a display unit matrix; for example: if the field angle of the preset image is 60 degrees and the field angle of each micro-display unit 3 is 4 degrees, the number of micro-display units 3 in the same direction is 15, and a matrix of 15 × 15 micro-display units 3 should appear in the head-mounted display device.
Wherein the second direction is perpendicular to a first direction, and the first direction is a direction in which the head-mounted display device points to the eyes of a wearer;
wherein d is0Is a panel width of the microdisplay; f is the focal length of the micro lens; theta is the angle of the emergent beam of the micro-display unit, namely the angle of the field of view
103. Determining the distance between the centers of the adjacent microlenses 2 in the adjacent micro display units 3 according to the field angle of the micro display units 3;
according to the formula 2. lelen × tan (theta)
Calculating the distance between the centers of the adjacent microlenses 2;
where le is the exit pupil distance; theta is the angle of the emergent beam of the micro-display unit 3, namely the angle of field of view; the lens is a distance between centers of adjacent microlenses 2, and for a detailed implementation process, reference is made to the detailed description of embodiment 1, which is not repeated herein.
104. Determining the distance between the centers of adjacent micro displays 1 in adjacent micro display units 3 according to the field angle of the micro display unit 3;
according to Loled ═ (le + f) x tan (theta) (equation 3)
Calculating the distance between the centers of the adjacent micro displays 1 in the adjacent micro display units 3;
where le is the exit pupil distance; f is the focal length of the microlens 2; theta is the angle of the emergent beam of the micro-display unit 3, namely the angle of field of view; loled is the distance between the centers of the adjacent microdisplays 1;
or according to shift ═ Loled-Llens (equation 4)
Calculating the position offset of each micro display 1 relative to the center of the micro lens 2 in the same micro display unit 3;
wherein Loled is the distance between centers of adjacent microdisplays; the Llens is the distance between the centers of the adjacent micro lenses; shif is the position offset of each microdisplay relative to the center of the microlens in the same microdisplay unit; for a detailed implementation process, please refer to the detailed description of embodiment 1, which will not be described herein.
105. The micro lenses 2 and the micro displays 1 are in one-to-one correspondence and are mutually attached to form a micro display unit 3;
attaching the micro lens 2 belonging to the same micro display unit 3 and the micro display 1 according to the position of the micro display 1 belonging to the same micro display unit 3 relative to the micro lens 2 obtained in the step 105, so that the micro lens 2 and the micro display 1 are combined into an integral structure; since the focal length of the micro lens 2 is small, the distance between the micro display 1 and the micro lens 2 is small, and the micro display 1 and the micro lens 2 can be attached to each other to form the integrated micro display unit 3, and certainly, the micro distance between the micro display 1 and the micro lens can be filled with fillers to attach the micro display unit and the integrated micro display unit, for example: transparent organic material or glass, i.e. not to prevent the parallel projection of the partial image of the microdisplay 1 by the microlenses 2.
106. And installing a preset number of the micro display units 3 on a head-mounted display device body according to the distance between the centers of the adjacent micro lenses 2 in the adjacent micro display units 3, and connecting the preset number of the micro displays 1 with a processor through signals.
The plurality of micro display units 3 are mounted according to the distance between the centers of the adjacent micro lenses 2 found in step 104 to form an overall display matrix of the head-mounted device, and display of a preset image is performed for image display control of the plurality of micro displays 1 by the processor.
The horizontal flatness measuring apparatus 1 in this embodiment may directly adopt the horizontal flatness measuring apparatus 1 described in embodiment 1, and for a specific implementation process, reference is made to the detailed process of embodiment 1, which is not described herein in detail.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (13)
1. A head-mounted display device, characterized in that: which comprises
A body for removable wearing on a wearer's head;
the micro-displays are arranged on the body to form a micro-display matrix, and each micro-display is used for displaying a partial image of a preset image so as to splice the partial images into the preset image;
the micro lenses are arranged on one side of the micro displays facing the eyes of the wearer, the micro lenses and the micro displays are in one-to-one correspondence and are mutually attached, and each micro lens is used for projecting the partial image in parallel; and each microlens and its corresponding microdisplay form a microdisplay unit, the field angles of adjacent microdisplay units are connected to each other for connecting the edges of the partial images projected in parallel to each other;
the processor is arranged on the body and is connected with the micro-display signals and used for sending image signals to the micro-displays.
2. The head-mounted display device of claim 1, wherein:
the plurality of microlenses are convex lenses;
the micro display in each micro display unit is positioned on a focal plane of the micro lens in a first direction;
wherein the first direction is a direction pointed by a wearer's eye toward the head mounted display device.
3. The head-mounted display device of claim 2, wherein:
the body is provided with 3 micro display unit matrixes, each display unit matrix comprises a plurality of micro display units, and the field angles of the 3 display unit matrixes are the same as the preset image;
wherein the microdisplays in each of the display matrices display only one of the colors red, green, and blue.
4. The head-mounted display device of claim 2, wherein:
each of the micro-display units has a field angle of
Theta＝2*actan(d0/2f) (equation 1)
Wherein d is0Is a panel width of the microdisplay; f is the focal length of the micro lens; theta is the angle of the emergent beam of the micro-display unit, namely the angle of the field of view.
5. The head-mounted display device of claim 4, wherein:
the distance between the centers of the adjacent microlenses is
Lelen × tan (theta) (formula 2)
Where le is the exit pupil distance; theta is the angle of the emergent light beam of the micro-display unit, namely the angle of the field of view; and the Llens is the distance between the centers of the adjacent micro lenses.
6. The head-mounted display device of claim 5, wherein:
the distance between the centers of the adjacent microdisplays is
Long ═ (le + f) × (theta) (equation 3)
Where le is the exit pupil distance; f is the focal length of the micro lens; theta is the angle of the emergent light beam of the micro-display unit, namely the angle of the field of view; and Loled is the distance between the centers of adjacent microdisplays.
7. The head-mounted display device of claim 6, wherein:
the position offset of each micro display relative to the center of the micro lens in the same micro display unit is
shift is long-Llens (formula 4)
Wherein Loled is the distance between centers of adjacent microdisplays; the Llens is the distance between the centers of the adjacent micro lenses; shif is the position offset of each microdisplay relative to the center of the microlens in the same microdisplay unit.
8. The head-mounted display device of claim 2, wherein:
the distance between the centers of the adjacent microlenses is larger than or equal to the sum of the radii of the adjacent microlenses.
9. A method for manufacturing a head-mounted display device according to claims 1-8, comprising the steps of:
determining the field angle of a preset image;
determining the field angle of the micro display units, and calculating the preset number of the micro display units;
determining the distance between the centers of the adjacent microlenses in the adjacent micro display units according to the field angle of the micro display units;
determining the distance between the centers of adjacent microdisplays in the adjacent microdisplay units according to the field angle of the microdisplay units;
the micro lenses and the micro displays are in one-to-one correspondence and are mutually attached to form a micro display unit;
and installing a preset number of micro display units on a head-mounted display device body according to the distance between the centers of adjacent micro lenses in the adjacent micro display units, and connecting the preset number of micro displays with a processor through signals.
10. The method for manufacturing the head-mounted display device according to claim 9, wherein the method for determining the field angle of the micro display units and calculating the number of the micro display units comprises
According to Theta 2 actan (d)0/2f) (equation 1)
Calculating a field angle of the micro-display unit;
dividing the preset image field angle by the micro-display unit field angle to obtain a preset number of micro-display units, and sequentially arranging a preset number of rows/columns of the micro-display units along a second direction to form a display unit matrix;
wherein the second direction is perpendicular to a first direction, and the first direction is a direction in which the head-mounted display device points to the eyes of a wearer;
wherein d is0Is a panel width of the microdisplay; f is the focal length of the micro lens; theta is the angle of the emergent beam of the micro-display unit, namely the angle of the field of view.
11. The method for manufacturing the head-mounted display device according to claim 10, wherein the method for determining the distance between the centers of the adjacent microlenses in the adjacent micro display units according to the field angle of the micro display units comprises
According to the formula 2. lelen × tan (theta)
Calculating the distance between the centers of the adjacent micro lenses;
where le is the exit pupil distance; theta is the angle of the emergent light beam of the micro-display unit, namely the angle of the field of view; and the Llens is the distance between the centers of the adjacent micro lenses.
12. The method for manufacturing a head-mounted display device according to claim 11, wherein the method for determining the distance between the centers of the adjacent microdisplays in the adjacent microdisplay units according to the field angle of the microdisplay units comprises
According to Loled ═ (le + f) x tan (theta) (equation 3)
Calculating the distance between the centers of the adjacent micro displays in the adjacent micro display units;
where le is the exit pupil distance; f is the focal length of the micro lens; theta is the angle of the emergent light beam of the micro-display unit, namely the angle of the field of view; and Loled is the distance between the centers of adjacent microdisplays.
13. The method for manufacturing a head-mounted display device according to claim 9, wherein the method for forming the micro display unit by one-to-one corresponding and attaching the plurality of micro lenses and the plurality of micro displays to each other comprises:
and attaching the microdisplay to the micro lens at the position of the focal plane of the micro lens, and attaching the microdisplay and the micro lens through a transparent material.
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| US20130285885A1 (en) * | 2012-04-25 | 2013-10-31 | Andreas G. Nowatzyk | Head-mounted light-field display |
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