CN107203040B - Head-mounted display device and method for processing eyepiece optical system - Google Patents

Abstract

The invention relates to a head-mounted display device and a processing method of an eyepiece optical system thereof, comprising the eyepiece optical system and a display screen which are correspondingly arranged; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3, the eyepiece optical system comprising one or more lenses; the broadside of at least one lens in the eyepiece optical system is the broadside after trimming treatment, and the range of the minimum value of the reserved size after trimming the broadside of the lens and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66. According to the scheme, the wide edge of the lens is trimmed, the length of the long edge of the lens is kept unchanged, so that the whole weight of the eyepiece optical system is reduced, the eyepiece optical system is easy to process and assemble, and meanwhile, the eyepiece optical system can be ensured to be more comfortable to wear under the condition that the eyepiece optical system meets the optical performances of large viewing angle, high image resolution, low distortion, small field curvature, small volume and the like.

Description

Head-mounted display device and method for processing eyepiece optical system thereof

Technical field

The present invention relates to the field of optical technology, and more specifically, to a head-mounted display device and a processing method of its eyepiece optical system.

Background technique

With the continuous development of electronic devices towards ultra-miniaturization, as well as the development of new computer, microelectronics, optoelectronic devices and communication theories and technologies, wearable computing, a new model based on "people-oriented" and "human-machine integration" has become possible . Applications are constantly emerging in military, industrial, medical, education, consumer and other fields. In a typical wearable computing system architecture, the head-mounted display device is a key component. The head-mounted display device uses optical technology to guide the video image light emitted by the micro-image display (such as a transmissive or reflective liquid crystal display, an organic electroluminescent device, and a DMD device) to the user's pupil. The scope realizes virtual and enlarged images, providing users with intuitive and visual images, videos, and text information. The eyepiece optical system is the core of the head-mounted display device, which realizes the function of displaying miniature images in front of the human eye to form a virtual magnified image.

Head-mounted display devices are developing in the direction of compact size, light weight, easy to wear on the head, and load reduction. At the same time, large field of view and visual comfort experience have gradually become key factors in measuring the quality of head-mounted display devices. The large field of view determines the visual experience with a high sense of presence, and the high image quality and low distortion determine the comfort of the visual experience. Spend. To meet these requirements, the eyepiece optical system needs to achieve a large field of view, high image resolution, low distortion, small field curvature, small volume and other indicators as much as possible. At the same time, meeting the above optical performance is very important for system design and aberration optimization. challenge.

When processing the eyepiece optical system, it is generally necessary to trim the eyepiece optical system according to the size of the display screen. This can still ensure that the weight and volume of the eyepiece optical system are reduced as much as possible while meeting the above optical performance, making the head-mounted display The device product is more comfortable to wear.

Contents of the invention

The technical problem to be solved by the present invention is to provide a head-mounted display device with good optical performance, compact size, light weight, and good processability with a wide-band edge-cut eyepiece optical system in view of the above-mentioned defects of the prior art.

The technical solutions adopted by the present invention to solve the technical problems are:

Construct a head-mounted display device, including a corresponding eyepiece optical system and a display screen; the length and width ratio range of the effective display screen of the display screen is: 1:1-16:3, and the eyepiece optical system at least includes One or more lenses; wherein, at least one of the wide sides of the lens is the wide side after trimming, and the minimum remaining size of the wide side of the lens after trimming is equal to the maximum effective optics of the lens. The aperture ratio range is: 0.22-0.66.

In the head-mounted display device of the present invention, at least one of the lenses has a long side that has been trimmed, and the front view of the lens after trimming has four corners that are round. arc-shaped rectangle;

When the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.80.

In the head-mounted display device of the present invention, at least one of the lenses has a long side that has been trimmed, and the front view of the lens after trimming has four corners that are round. arc-shaped rectangle;

When the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.9.

In the head-mounted display device of the present invention, the length and width ratio corresponding to the effective display screen of the display screen is 16:16, and the minimum value of the retained size after trimming of the wide edge of the lens is equal to the maximum value of the lens. The effective optical aperture ratio range is: greater than 0.66;

And/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.80.

In the head-mounted display device of the present invention, the length and width ratio corresponding to the effective display screen of the display screen is 16:12, and the minimum retained size after trimming of the wide edge of the lens is equal to the maximum remaining size of the lens. The effective optical aperture ratio is: greater than 0.57;

And/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.87.

In the head-mounted display device of the present invention, the length and width ratio corresponding to the effective display screen of the display screen is 16:10, and the minimum remaining size after trimming of the wide side of the lens is equal to the maximum size of the lens. The effective optical aperture ratio range is: greater than 0.51;

And/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.91.

In the head-mounted display device of the present invention, the length and width ratio corresponding to the effective display screen of the display screen is 16:9, and the minimum retained size after trimming of the wide edge of the lens is equal to the maximum remaining size of the lens. The effective optical aperture ratio range is: greater than 0.47;

And/or, the ratio range of the minimum remaining size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.93.

In the head-mounted display device of the present invention, the eyepiece optical system includes two lenses, namely: a first lens and a second lens; wherein,

The wide side of the first lens is the wide side after trimming;

The wide side of the second lens is the wide side after trimming, and the long side of the second lens is the long side after trimming.

In the head-mounted display device of the present invention, the eyepiece optical system includes three lenses, namely: a first lens, a second lens and a third lens; wherein,

The wide sides of the first lens, the second lens and the third lens are the wide sides after trimming, and the long sides of the first lens, the second lens and the third lens are the long sides after trimming.

In the head-mounted display device of the present invention, the eyepiece optical system includes four lenses, namely: a fourth lens, a fifth lens, a sixth lens and a seventh lens; wherein,

The wide sides of the fourth lens, the fifth lens, the sixth lens and the seventh lens are all wide sides after trimming.

The head-mounted display device of the present invention, wherein the head-mounted display device is a single-eye head-mounted display device, including:

an eyepiece optical system; and, a display screen corresponding to the eyepiece optical system.

The head-mounted display device of the present invention, wherein the head-mounted display device is a binocular head-mounted display device, including:

a left eye eyepiece optical system; and, a left eye display screen corresponding to the left eye eyepiece optical system;

a right eye eyepiece optical system; and, a right eye display screen corresponding to the right eye eyepiece optical system.

The head-mounted display device of the present invention, wherein the eyepiece optical system includes:

The first lens, the second lens and the third lens are arranged coaxially along the optical axis. The first lens is close to the human eye side, and the third lens is close to the image source side. The image source light passes through the third lens and the second lens successively. , the first lens is viewed by the human eye;

The combined refractive power of the first lens and the second lens is positive, and the surface of the second lens close to the image source side is convex toward the image source direction;

The two optical surfaces of the third lens have the same curvature direction and are both concave toward the image source direction.

The head-mounted display device of the present invention, wherein the eyepiece optical system includes:

It includes a first lens group and a second lens group arranged coaxially along the optical axis direction from the human eye observation side to the display screen side, and the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is negative. The effective focal length is a positive value;

The first lens group is composed of two lenses, a fourth lens close to the human eye side and a fifth lens far away from the human eye side, and the fourth lens is a biconvex positive lens. The lens is a negative lens; the optical surface of the fifth lens close to the human eye side is concave toward the human eye side, and the radius of curvature is a negative value;

The second lens group is composed of one or more lenses, wherein the second lens group includes at least a sixth lens adjacent to the first lens group and a seventh lens, and the sixth lens is a positive lens , the seventh lens is located between the sixth lens and the display screen side.

The head-mounted display device according to the present invention, wherein the eyepiece optical system includes: a first lens group and a second lens group arranged coaxially in sequence along the optical axis from the human eye observation side to the display screen side, and the The effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value;

The first lens group is composed of two lenses, an eighth lens close to the human eye side and a ninth lens far away from the human eye side, and the eighth lens is a biconvex positive lens, and the ninth lens The lens is a negative lens; the second lens group is composed of one or more lenses, wherein the second lens group at least includes a tenth lens adjacent to the first lens group, and the tenth lens is a positive lens;

The second lens group also includes an eleventh lens and a twelfth lens, and the tenth lens, the eleventh lens and the twelfth lens are arranged in order from the human eye side to the microdisplay side;

The eleventh lens is located between the tenth lens and the display screen side.

The present invention also provides a method for processing the eyepiece optical system of a head-mounted display device as described above, which includes the following steps:

Trim the wide edge of the lens of the head-mounted display device;

Among them, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: 0.22-0.66; the corresponding length and width ratio range of the effective display screen of the display screen is: 1 :1-16:3.

The processing method of the present invention, wherein the remaining dimension after trimming the wide side of the lens is D, the remaining dimension after trimming the long side of the lens is E, and the outer diameter of the eyepiece optical system before processing is B; among them, B, D, and E satisfy the following relationship (3):

When the value of E/B is greater than 0.92, the long-side trimming process of the eyepiece optical system is not performed.

The processing method of the present invention further includes the step of trimming the long side of the lens of the head-mounted display device; wherein,

When the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.80;

Or it further includes the step of trimming the long side of the lens of the head-mounted display device; wherein,

When the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.9.

The beneficial effects of the present invention are: by cutting the wide side of the lens according to the set cutting method, or cutting the long side at the same time, the overall weight of the eyepiece optical system is reduced, and it is easy to process and assemble. It can ensure that the eyepiece optical system meets the optical performance of large field of view, high image resolution, low distortion, small field curvature, small size, etc., making the head-mounted display device more comfortable to wear.

Description of the drawings

In order to more clearly illustrate the embodiments of the present invention or technical solutions in the prior art, the present invention will be further described below with reference to the drawings and examples. The drawings in the following description are only some embodiments of the present invention. For those in the field Ordinary technicians can also obtain other drawings based on these drawings without exerting creative work:

Figure 1 is a schematic diagram of the wide-side trimming method of the head-mounted display device according to the preferred embodiment of the present invention;

Figure 2 is a front structural view of the eyepiece optical system after wide-side trimming of the head-mounted display device according to the preferred embodiment of the present invention;

Figure 3 is a schematic diagram of the three-dimensional assembly of multiple lenses in the eyepiece optical system after wide-side trimming of the head-mounted display device according to the preferred embodiment of the present invention;

Figure 4 is a schematic diagram of the optical path of the eyepiece optical system before wide-side trimming of the head-mounted display device according to the preferred embodiment of the present invention;

Figure 5 is a schematic diagram of the optical path of the eyepiece optical system after wide-side trimming of the head-mounted display device according to the preferred embodiment of the present invention;

Figure 6 is a schematic diagram 1 of the simultaneous cutting of the wide and long sides of the head-mounted display device according to the preferred embodiment of the present invention;

Figure 7 is a front structural view of the eyepiece optical system of the head-mounted display device according to the preferred embodiment of the present invention after the wide and long sides are cut simultaneously;

Figure 8 is a three-dimensional structural view of the eyepiece optical system of the head-mounted display device according to the preferred embodiment of the present invention after the wide and long sides are cut simultaneously;

Figure 9 is a schematic diagram of the optical path of the eyepiece optical system shown in Figures 7 and 8;

Figure 10 is a second schematic diagram of the simultaneous cutting of the wide and long sides of the head-mounted display device according to the preferred embodiment of the present invention;

Figure 11 is a second front structural view of the eyepiece optical system of the head-mounted display device according to the preferred embodiment of the present invention after the wide and long sides are cut simultaneously;

Figure 12 is a second three-dimensional structural view of the eyepiece optical system after the wide and long sides are cut simultaneously according to the preferred embodiment of the present invention;

Figure 13 is a schematic diagram of the optical path of the eyepiece optical system before simultaneous cutting of the wide and long sides according to the preferred embodiment of the present invention;

Figure 14 is a schematic diagram of the optical path of the eyepiece optical system after the wide and long sides are simultaneously trimmed according to the preferred embodiment of the present invention;

FIG. 15 is a schematic diagram of the angle-cutting method of the lens of the head-mounted display device according to the preferred embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only partial embodiments of the present invention, and Not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without any creative effort fall within the protection scope of the present invention.

The head-mounted display device of the wide-band edge-cut eyepiece optical system of the preferred embodiment of the present invention includes a corresponding eyepiece optical system and a display screen; the corresponding length and width ratio range of the effective display screen of the display screen is: 1:1-16: 3. The eyepiece optical system includes at least one or more lenses; among them, the wide edge of at least one lens is the wide edge after trimming, and the minimum remaining size of the lens after trimming is equal to the maximum effective size of the lens. The optical aperture ratio range is: 0.22-0.66, including: 0.22, 0.27, 0.32, 0.36, 0.40, 0.44, 0.47, 0.51, 0.54, 0.57, 0.59, 0.62, 0.64, 0.66. Or further, the length and width ratio range corresponding to the effective display screen of the display screen is: 1:1-2:1; the eyepiece optical system includes at least one or more lenses; among which, the wide side of at least one lens is used for over-cutting. The wide edge after edge processing, and the ratio of the minimum retained size after trimming the wide edge of the lens to the maximum effective optical aperture of the lens is: 0.44-0.66.

It has been verified that after trimming the wide edge of the lens, the ratio of the minimum remaining size to the maximum effective optical aperture of the lens ranges from 0.22 to 0.66, preferably 0.44 to 0.66, which not only reduces the overall weight of the eyepiece optical system , easy to process and assemble, while ensuring that the eyepiece optical system meets optical properties such as large field of view, high image resolution, low distortion, small field curvature, and small size, making the head-mounted display device more comfortable to wear.

Since the eyepiece optical system is an axially symmetrical optical structure, when used to observe a rectangular display area, part of the light range is not effectively utilized. Therefore, the long side and/or width of the lens can be adjusted according to the effective display ratio of the display screen. Cutting is carried out while cutting, and the part of the optical structure corresponding to the light transmission range that is not effectively utilized is removed. The remaining optical structure can still ensure large field of view, high image resolution, low distortion, small field curvature, small volume, etc. Optical properties.

Figure 1 shows a wide-edge cutting method for a head-mounted display device. The positions of two parallel dotted lines are the cutting lines. The solid line ring with a larger diameter represents the original size of the lens, and the solid line ring with a smaller diameter represents the original size of the lens. Indicates the maximum effective optical size of the lens. Among them, A is the maximum effective optical aperture of the lens, B is the outer diameter of the lens, C is the lens processing and manufacturing allowance, and D is the remaining size after trimming the wide edge of the lens.

Figure 2 shows the front structure of the eyepiece optical system after trimming using the trimming method in Figure 1. Figure 3 shows the three-dimensional assembly structure of the eyepiece optical system after trimming using the trimming method in Figure 1. It can be seen that the upper and lower The edges are cut off and the arcs on both sides are retained to facilitate the installation and fixation of the eyepiece optical system in the head-mounted display device. Figure 4 shows a schematic diagram of the optical path of the eyepiece optical system before wide-side trimming. It can be seen that the light coverage does not involve the entire surface of the eyepiece optical system, but a certain rectangular area within it; Figure 5 shows the optical path after wide-side trimming. Schematic diagram of the optical path of the eyepiece optical system after wide edge trimming. It can be seen that the removal of part of the lens does not affect the light passing part, ensuring that the eyepiece optical system meets the requirements of large field of view, high image resolution, low distortion, small field curvature, Small size and other optical properties.

In a further embodiment, the long side of at least one lens in the eyepiece optical system of the head-mounted display device is the long side after trimming, and the front view of the lens after trimming has four corners: Arc-shaped rectangle; when the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the ratio range of the minimum remaining size after trimming the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.80; or, When the ratio between the outer diameter of the lens and the maximum effective optical aperture is greater than 1.1, the ratio of the minimum retained size of the long side of the lens after trimming to the maximum effective optical aperture of the lens is greater than 0.9.

Figure 6 shows a method of simultaneously cutting the long and wide sides of a head-mounted display device. The positions of two sets of parallel dotted lines are the long and wide side cutting lines respectively. The solid line ring with a larger diameter represents the original lens. Size, the smaller diameter solid circle represents the maximum effective optical size of the lens. Among them, A is the maximum effective optical aperture of the lens, B is the outer diameter of the lens, C is the lens processing and manufacturing allowance, D is the remaining size of the lens after wide-side trimming, and E represents the remaining size of the lens after long-side trimming. .

Figures 7 and 8 respectively show the front structure and three-dimensional structure of the eyepiece optical system after the wide and long sides of the head-mounted display device of the present invention are cut simultaneously in the manner illustrated in Figure 6. It can be seen that the wide sides are cut The long side of the lens is cut into a rectangular shape with four arc-shaped corners. Figure 9 shows a quarter of the optical path diagram of the eyepiece optical system in Figures 7 and 8. It can be seen that even if the long and wide sides are trimmed, the optical path 100 is not affected and the eyepiece optics can still be guaranteed. The system meets optical performance such as large field of view, high image resolution, low distortion, small field curvature, and small size.

Preferably, in the above head-mounted display device, when the length and width ratio corresponding to the effective display screen of the display screen is 16:16, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.66; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.80.

Preferably, in the above head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:15, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.64; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.82.

Preferably, in the above head-mounted display device, when the length and width ratio corresponding to the effective display screen of the display screen is 16:14, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.62; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.84.

Preferably, in the above-mentioned head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:13, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.59; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.86.

Preferably, in the above-mentioned head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:12, the ratio of the minimum remaining size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: Greater than 0.57; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.87.

Preferably, in the above-mentioned head-mounted display device, the length-to-width ratio range corresponding to the effective display screen on the display screen is: when greater than 16:11, the minimum remaining size of the wide edge of the lens after trimming is equal to the maximum effective optical aperture of the lens. The ratio range is: greater than 0.54; and/or, the ratio range of the minimum remaining size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.89.

Preferably, in the above head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:10, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.51; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.91.

Preferably, in the above head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:9, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.47; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.93.

Preferably, in the above-mentioned head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:8, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.44; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.94.

Preferably, in the above head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:7, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.40; and/or, the ratio range of the minimum remaining size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.96.

Preferably, in the above-mentioned head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:6, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.36; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.98.

Preferably, in the above-mentioned head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:5, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.32; and/or, the ratio range of the minimum remaining size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.99.

Preferably, in the above-mentioned head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:4, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.27; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 1.00.

Preferably, in the above head-mounted display device, when the length-to-width ratio corresponding to the effective display screen of the display screen is 16:3, the ratio range of the minimum retained size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: : greater than 0.22; and/or, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 1.02.

Figure 10 shows a method of simultaneously cutting the long and wide sides of a head-mounted display device. The positions of two sets of parallel dotted lines are the long and wide side cutting lines respectively. The solid line ring with a larger diameter represents the original lens. Size, the smaller diameter solid circle represents the maximum effective optical size of the lens. Among them, A is the maximum effective optical aperture of the lens, B is the outer diameter of the lens, C is the lens processing and manufacturing allowance, D is the remaining size of the lens after wide-side trimming, and E represents the remaining size of the lens after long-side trimming. .

Figures 11 and 12 respectively show the front structure and three-dimensional structure of the eyepiece optical system after the wide and long sides of the head-mounted display device of the present invention are cut simultaneously in the manner illustrated in Figure 10. It can be seen that the wide sides are cut The lens 30 after trimming the long sides is a rectangle; the ratio range of the minimum remaining size of the lens after trimming to the maximum effective optical aperture of the lens is: 0.683-0.992. Figure 13 shows the optical path diagram of the eyepiece optical system before trimming the long and wide sides according to the method of Figures 6 and 10. Figure 14 shows the optical path diagram of the long and wide sides before trimming according to the method of Figures 6 and 10. From the optical path diagram of the eyepiece optical system below, it can be seen that even if the long and wide sides are trimmed, the optical path 100 is not affected, and the eyepiece optical system can still ensure that the eyepiece optical system meets the requirements of large field of view, high image resolution, low distortion, Optical properties such as small field curvature and small volume.

Preferably, in the above embodiment, the edge trimming process is performed as shown in Figure 10. When the length and width ratio corresponding to the effective display screen of the display screen is 16:16, the minimum retained size of the wide edge of the lens after trimming is equal to The maximum effective optical aperture ratio range of the lens is: greater than 0.66; the ratio range of the minimum remaining size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.683;

Preferably, in the above embodiment, the edge trimming process is performed as shown in Figure 10. When the length and width ratio corresponding to the effective display screen of the display screen is 16:12, the minimum retained size of the wide edge of the lens after trimming is equal to The maximum effective optical aperture ratio of the lens is: greater than 0.57; the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.778.

Preferably, in the above embodiment, the edge trimming process is performed as shown in Figure 10. When the length and width ratio corresponding to the effective display screen of the display screen is 16:10, the minimum retained size of the wide edge of the lens after trimming is equal to The maximum effective optical aperture ratio range of the lens is: greater than 0.51; the ratio range of the minimum remaining size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.832.

Preferably, in the above embodiment, the edge trimming process is performed as shown in Figure 10. When the length and width ratio corresponding to the effective display screen of the display screen is 16:9, the minimum retained size of the wide edge of the lens after trimming is equal to The maximum effective optical aperture ratio range of the lens is: greater than 0.47; the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture range of the lens is greater than 0.860.

In a further embodiment, trimming is performed as shown in Figure 15. The long side of the lens is the long side after trimming, and the front view of the lens is a polygon formed by cutting off the four corners of a rectangle; In the front view of the lens, the parts with the four corners cut off are all triangles; the length of the side z1 corresponding to the wide side of the triangle and the lens is marked as F, the side length of the side z2 corresponding to the long side of the triangle and the lens is marked as G, and the length of the side z1 of the triangle and the long side of the lens is marked as G. The length of the three sides z3 is recorded as H, the corresponding angle from z1 to z3 is ^∠ α, and the angle from the diagonal of the effective display screen to the long side of the effective display screen is ^∠ β; among them, the following relationship is satisfied ( 1) and (2):

∠α＝ ^∠β ＝atan(b/a) (1);

F/D ≤ 0.26 (2);

In the above relational expressions (1) and (2), a is the length corresponding to the effective display screen of the display screen, b is the width corresponding to the effective display screen of the display screen, and D is the remaining size after trimming the wide edge of the lens.

In various embodiments provided by the present invention, the head-mounted display device may be a monocular head-mounted display device, including: an eyepiece optical system; and a display screen corresponding to the eyepiece optical system. Alternatively, the head-mounted display device is a dual-eye head-mounted display device, including: a left-eye eyepiece optical system; and, a left-eye display screen corresponding to the left-eye eyepiece optical system; a right-eye eyepiece optical system; and, a right-eye eyepiece optical system The right eye display corresponds to the eyepiece optical system.

In a specific embodiment, as shown in FIGS. 7 , 8 and 9 , the eyepiece optical system of the head-mounted display device includes two lenses 20 : a first lens 21 and a second lens 22 . Wherein, the wide side of the first lens 21 is the wide side after trimming; the wide side of the second lens 22 is the wide side after trimming. Meanwhile, the lengths of the first lens 21 and the second lens 22 are The edge is the long edge after trimming. The ratio of the minimum retained size after wide-side trimming of the first lens 21 and the second lens 22 to the maximum effective optical aperture of the lens ranges from 0.22 to 0.66. When the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the ratio of the minimum remaining size after trimming the long side of the lens to the maximum effective optical aperture of the lens is greater than 0.80. When the ratio between the outer diameter of the lens and the maximum effective optical aperture is greater than 1.1, the ratio of the minimum retained size of the long side of the lens after trimming to the maximum effective optical aperture of the lens is greater than 0.9.

In another specific embodiment, as shown in FIGS. 13 and 14 , the eyepiece optical system of the head-mounted display device includes three lenses: a first lens 21 , a second lens 22 and a lens that are coaxially arranged in sequence along the optical axis. The third lens 23, where the first lens 21 is close to the human eye side, and the third lens 23 is close to the image source side, the image source light is viewed by the human eye through the third lens 23, the second lens 22, and the first lens 21 successively; The surface of the second lens 22 close to the image source is convex toward the direction of the image source; the two optical surfaces of the third lens 23 have the same curvature direction and are both concave toward the direction of the image source.

Wherein, preferably, the wide sides of the first lens 21, the second lens 22 and the third lens 23 are the wide sides after trimming, and the minimum remaining size after trimming is equal to the maximum effective optical aperture of the lens. The ratio range is: 0.22-0.66, more preferably: 0.44-0.66; at the same time, the long sides of the first lens 21, the second lens 22 and the third lens 23 are the long sides after trimming; and the second lens 22, The ratio range of the minimum remaining size of the third lens 23 after trimming the long side to the maximum effective optical aperture of the second lens 22 and the third lens 23 is: greater than 0.8. The minimum remaining size of the first lens 21 after trimming the long side The maximum effective optical aperture ratio range to the second lens 22 and the third lens 23 is: 0.683-0.992.

In another specific embodiment, as shown in Figures 2, 3, 4 and 5, the eyepiece optical system of the head-mounted display device includes four lenses 10: including the light along the side from the human eye observation side to the display screen side. The first lens group and the second lens group are arranged coaxially in the axial direction, and the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value; the first lens group It is composed of two lenses, namely a fourth lens 11 close to the human eye side and a fifth lens 12 far away from the human eye side, and the fourth lens 11 is a biconvex positive lens, and the fourth lens 11 is Negative lens; the optical surface of the fifth lens 12 close to the human eye side is concave toward the human eye side, and the radius of curvature is a negative value; the second lens group is composed of one or more lenses, wherein the second lens group is at least It includes a sixth lens 13 adjacent to the first lens group, and a seventh lens 14. The sixth lens 13 is a positive lens, and the seventh lens 14 is located between the sixth lens 13 and the display screen side. between.

Among them, preferably, the wide sides of the fourth lens 11 , the fifth lens 12 , the sixth lens 13 and the seventh lens 14 are all wide sides after trimming; and the remaining size of the wide sides of the lenses after trimming is the smallest. The ratio of the value to the maximum effective optical aperture of the lens ranges from 0.22 to 0.66.

In another specific embodiment, the eyepiece optical system of the head-mounted display device includes five lenses (not shown): including a first lens group arranged coaxially along the optical axis direction from the human eye observation side to the display screen side. and a second lens group, and the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value; the first lens group is composed of two lenses, one lens close to the human eye. The eighth lens on the side and the ninth lens on the side away from the human eye, and the eighth lens is a biconvex positive lens, the ninth lens is a negative lens; the ninth lens is close to the optical surface on the side of the human eye. Concave to the human eye side, the radius of curvature is a negative value; the second lens group is composed of one or more lenses, wherein the second lens group at least includes a tenth lens adjacent to the first lens group, The tenth lens is a positive lens; the second lens group also includes an eleventh lens and a twelfth lens, and the tenth lens, the eleventh lens and the twelfth lens are arranged in order from the human eye side to the microdisplay side; The eleventh lens is located between the tenth lens and the display screen side. Among them, the eighth lens, the ninth lens, the tenth lens, the eleventh lens and the twelfth lens perform wide-side trimming in the same manner as in the aforementioned embodiments, or perform wide-side trimming and long-side trimming at the same time.

In another embodiment of the present invention, a method for processing the eyepiece optical system of a head-mounted display device is also provided. Referring to Figure 1 , the method includes the following steps: trimming the wide edge of the lens of the head-mounted display device; Among them, the ratio range of the minimum remaining size after trimming of the wide edge of the lens to the maximum effective optical aperture of the lens is: 0.22-0.66; the corresponding length and width ratio range of the effective display screen of the display screen is: 1:1-16:3 . It has been verified that after trimming the wide edge of the lens, the ratio of the minimum remaining size to the maximum effective optical aperture of the lens ranges from 0.22 to 0.66. This not only reduces the overall weight of the eyepiece optical system, but also makes processing and assembly easier. At the same time, it can ensure that the eyepiece optical system meets optical performance such as large field of view, high image resolution, low distortion, small field curvature, and small size, making the head-mounted display device more comfortable to wear.

In the above processing method, the remaining dimension after trimming the wide side of the lens is D, the remaining dimension after trimming the long side of the lens is E, and the outer diameter of the eyepiece optical system before processing is B; among them, B, D, and E satisfy the following Relationship (3):

When the value of E/B is greater than 0.92, the long edge of the eyepiece optical system will not be trimmed.

Referring to Figure 6, when the value of E/B is less than or equal to 0.92, the above processing method further includes the step of trimming the long side of the lens of the head-mounted display device; wherein, the ratio between the outer diameter of the lens and the maximum effective optical aperture is When 1.03-1.1, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.80.

Referring to Figure 6, when the value of E/B is less than or equal to 0.92, the above processing method further includes the step of trimming the long side of the lens of the head-mounted display device; wherein, the ratio between the outer diameter of the lens and the maximum effective optical aperture is When it is greater than 1.1, the ratio range of the minimum retained size after trimming of the long side of the lens to the maximum effective optical aperture of the lens is: greater than 0.9.

Referring to Figure 10, the above-mentioned processing method further includes the steps of: trimming the long side of the lens of the head-mounted display device; wherein the front view of the lens is a rectangle; the minimum remaining size after trimming the long side of the lens is equal to the maximum size of the lens. The effective optical aperture ratio range is: 0.683-0.992.

Referring to Figure 15, the above-mentioned processing method further includes the steps of: cutting corners of the lens. The front view of the lens is a polygon formed by cutting off the four corners of the rectangle; the parts with the four corners cut off in the front view of the lens are triangles; the triangle and The length of the wide side of the lens corresponding to side z1 is marked as F, the side of the triangle corresponding to the long side of the lens is marked as z2, the third side of the triangle is marked as z3, the angle corresponding to z1 to z3 is ^∠ α, and the display screen is valid The angle from the diagonal of the display screen to the long side of the effective screen is ^∠ β;

Among them, the following relations (1) and (2) are satisfied:

∠α＝ ^∠ β＝atan(b/a)(1);

F/D≤0.26(2);

In the above relational expressions (1) and (2), a is the length corresponding to the effective display screen of the display screen, b is the width corresponding to the effective display screen of the display screen, and D is the remaining size after trimming the wide edge of the lens.

To sum up, the present invention can reduce the overall weight of the eyepiece optical system by trimming the wide edge of the lens according to the set cutting method, or trimming the long edge at the same time, making it easy to process and assemble, and at the same time ensuring The eyepiece optical system makes the head-mounted display device more comfortable to wear while meeting the optical properties of large field of view, high image resolution, low distortion, small field curvature, and small size.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims (16)

1. A head-mounted display device comprises an eyepiece optical system and a display screen which are correspondingly arranged; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3, wherein the eyepiece optical system at least comprises one or more lenses; the method is characterized in that at least one broadside of the lens is the broadside after trimming, and the range of the minimum value of the reserved size of the broadside of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66;

The reserved size of the lens after the broadside is cut is D, the reserved size of the lens after the long side is cut is E, and the outer diameter of the eyepiece optical system before processing is B; wherein B, D, E satisfies the following relational expression (3):

when the value of E/B is greater than 0.92, the long side trimming treatment is not performed on the eyepiece optical system.

2. The head-mounted display device according to claim 1, wherein the long side of at least one of the lenses is a long side subjected to trimming, and the front view of the lens subjected to trimming is a rectangle having four corners in a circular arc shape;

when the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80.

3. The head-mounted display device according to claim 1, wherein the long side of at least one of the lenses is a long side subjected to trimming, and the front view of the lens subjected to trimming is a rectangle having four corners in a circular arc shape;

when the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.9.

4. A head-mounted display device according to claim 1, 2 or 3, wherein the ratio of the length to the width of the effective display screen is 16:12, and the ratio of the minimum value of the reserved size after the broadside trimming of the lens to the maximum effective optical aperture of the lens is: greater than 0.57;

and/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.87.

5. A head-mounted display device according to claim 1, 2 or 3, wherein the ratio of the length to the width of the effective display screen is 16:10, and the range of the minimum value of the reserved size after the broadside trimming of the lens to the maximum effective optical aperture ratio of the lens is: greater than 0.51;

and/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.91.

6. A head-mounted display device according to claim 1, 2 or 3, wherein the ratio of the length to the width of the effective display screen is 16:9, and the range of the minimum value of the reserved size after the broadside trimming of the lens and the maximum effective optical aperture ratio of the lens is: greater than 0.47;

And/or, the range of the minimum value of the reserved size of the long edge of the lens after trimming and the maximum effective optical aperture ratio of the lens is as follows: greater than 0.93.

7. A head mounted display device according to claim 1, 2 or 3, wherein the eyepiece optical system comprises two lenses, one for each: a first lens and a second lens; wherein,

the wide edge of the first lens is subjected to trimming treatment;

the wide side of the second lens is the wide side after trimming treatment, or the long side of the second lens is the long side after trimming treatment.

8. A head mounted display device according to claim 1, 2 or 3, wherein the eyepiece optical system comprises three lenses, respectively: a first lens, a second lens, and a third lens; wherein,

the wide sides of the first lens, the second lens and the third lens are the wide sides after trimming treatment, or the long sides of the first lens, the second lens and the third lens are the long sides after trimming treatment.

9. The head mounted display device of claim 1, wherein the eyepiece optical system comprises four lenses, one for each: a fourth lens, a fifth lens, a sixth lens, and a seventh lens; wherein,

The broadsides of the fourth lens, the fifth lens, the sixth lens and the seventh lens are broadsides subjected to trimming treatment.

10. The head mounted display device of claim 1, 2 or 3, wherein the head mounted display device is a monocular head mounted display device comprising:

an eyepiece optical system; and a display screen corresponding to the eyepiece optical system.

11. A head mounted display device according to claim 1, 2 or 3, wherein the head mounted display device is a binocular head mounted display device comprising:

a left eye eyepiece optical system; and a left eye display screen corresponding to the left eye eyepiece optical system;

a right eye eyepiece optical system; and a right eye display screen corresponding to the right eye eyepiece optical system.

12. The head-mounted display device of claim 1, 2, or 3, wherein the eyepiece optical system comprises:

the first lens is close to the human eye side, the third lens is close to the image source side, and image source light rays are watched by the human eye through the third lens, the second lens and the first lens in sequence;

The combined focal power of the first lens and the second lens is a positive value, and the surface of the second lens close to the image source side is convex towards the image source direction;

the curvature directions of the two optical surfaces of the third lens are the same, and both the two optical surfaces are concave towards the image source direction.

13. The head-mounted display device of claim 1, 2, or 3, wherein the eyepiece optical system comprises:

the optical lens comprises a first lens group and a second lens group which are coaxially and sequentially arranged along the optical axis direction from the observation side of human eyes to the display screen side, wherein the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value;

the first lens group consists of two lenses, namely a fourth lens close to the human eye side and a fifth lens far from the human eye side, wherein the fourth lens is a biconvex positive lens, and the fourth lens is a negative lens; the optical surface of the fifth lens close to the human eye side is concave to the human eye side, and the curvature radius is a negative value;

the second lens group is composed of one or more lenses, wherein the second lens group at least comprises a sixth lens adjacent to the first lens group, and a seventh lens, the sixth lens is a positive lens, and the seventh lens is positioned between the sixth lens and the display screen side.

14. The head-mounted display device of claim 1, 2, or 3, wherein the eyepiece optical system comprises: the optical lens comprises a first lens group and a second lens group which are coaxially and sequentially arranged along the optical axis direction from the observation side of human eyes to the display screen side, wherein the effective focal length of the first lens group is a negative value, and the effective focal length of the second lens group is a positive value;

the first lens group is composed of two lenses, namely an eighth lens close to the human eye side and a ninth lens far from the human eye side, wherein the eighth lens is a biconvex positive lens, and the ninth lens is a negative lens;

the second lens group is composed of one or more lenses, wherein the second lens group at least comprises a tenth lens adjacent to the first lens group, and the tenth lens is a positive lens;

the second lens group further includes an eleventh lens and a twelfth lens, the tenth lens, the eleventh lens and the twelfth lens being arranged in this order from the human eye side to the micro display side;

an eleventh lens is located between the tenth lens and the display screen side.

15. A method of processing an eyepiece optical system of a head mounted display device as recited in claim 1 comprising the steps of:

Trimming the wide edge of the lens of the head-mounted display device;

wherein, the range of the minimum value of the reserved size of the broadside cut edge of the lens and the maximum effective optical aperture ratio of the lens is as follows: 0.22-0.66; the length and width ratio range corresponding to the effective display picture of the display screen is as follows: 1:1-16:3;

the reserved size of the lens after the broadside is cut is D, the reserved size of the lens after the long side is cut is E, and the outer diameter of the eyepiece optical system before processing is B; wherein B, D, E satisfies the following relational expression (3):

when the value of E/B is greater than 0.92, the long side trimming treatment is not performed on the eyepiece optical system.

16. The method of processing according to claim 15, further comprising the step of: trimming the long side of the lens of the head-mounted display device; wherein,

when the ratio of the outer diameter of the lens to the maximum effective optical aperture is 1.03-1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.80;

or further comprising the steps of: trimming the long side of the lens of the head-mounted display device; wherein,

When the ratio of the outer diameter of the lens to the maximum effective optical aperture is greater than 1.1, the range of the minimum value of the reserved size of the long side edge cut of the lens to the maximum effective optical aperture ratio of the lens is as follows: greater than 0.9.