Search

CN-122018692-A - VR equipment visual comfort transition method and device based on eyelid bionic

CN122018692ACN 122018692 ACN122018692 ACN 122018692ACN-122018692-A

Abstract

The invention discloses a visual comfort transition method and device of VR equipment based on eyelid bionic, wherein the method controls a physical shading component arranged between eyes of a user and a display unit, simulates opening and closing movement of human eyelid to manage eye-entering light, and specifically comprises the steps of receiving an input instruction, selecting to enter a protective instantaneous closing mode or an adaptive gradual change mode according to the type of the input instruction, executing a protective instantaneous closing curve to provide active physical protection if the protective instantaneous closing mode is entered, executing an adaptive gradual change curve to drive the physical shading component to open or close in a non-uniform movement mode if the adaptive gradual change mode is entered, wherein the speed change curve of the non-uniform movement is designed based on the natural opening and closing movement law of the human eyelid and a pupil light reflection dynamic model. According to the invention, eyelid is simulated through the physical shading component, and light input is controlled through the opening and closing dynamics characteristics of the eyelid, so that no dizziness and high comfort switching between virtual and real environments are realized.

Inventors

  • PENG BO

Assignees

  • 彭博

Dates

Publication Date
20260512
Application Date
20260202

Claims (10)

  1. 1. A VR device visual comfort transition method based on eyelid bionics, comprising: Controlling a physical shading component arranged between eyes of a user and a display unit, and simulating opening and closing movement of human eyelid to manage eye-entering rays; the step of controlling specifically includes: Receiving an input instruction; according to the type of the input instruction, arbitrating and selecting to enter a protective instantaneous closing mode or an adaptive gradual change mode; if the protective transient closing mode is entered, executing a protective transient closing curve, and driving the physical shading component to be rapidly closed from an opening state within 150-250 milliseconds so as to provide active physical protection; And if the adaptive gradual change mode is entered, executing an adaptive gradual change curve, and driving the physical shading component to open or close in non-uniform motion, wherein the speed change curve of the non-uniform motion is designed based on the natural opening and closing motion law of human eyelid and pupil light reflection dynamics model so as to match the luminous flux change rate with the visual physiological adaptation process.
  2. 2. The VR device visual comfort transition method based on eyelid bionic as set forth in claim 1, wherein the total execution time T of said protective transient closed curve is configured to make the total time of the physical shading component passing through the first acceleration segment, the second constant speed segment, and the third buffer segment to move from the initial opening s_start to the end opening s_end, where 150 ms is equal to or less than T is equal to or less than 250 ms; continuously accelerating the physical shading component to a maximum design speed V_max at the maximum acceleration of the system in the first acceleration section, wherein the duration of the first acceleration section is t 1 ; Maintaining uniform motion at a maximum design speed V_max reached by the physical shading component in the second uniform speed section, wherein the duration time of the second uniform speed section is t 2 ; And the third buffer section adopts an S-shaped speed curve model, so that the physical shading component is smoothly decelerated to zero from the maximum design speed V_max and is accurately stopped at the end opening S_end, and the duration of the third buffer section is t 3 .
  3. 3. The method of claim 2, wherein the total execution time of the protective transient closing mode is no more than 200ms, the duration t 1 of the first acceleration segment is within 60-100 ms, the duration t 2 of the second constant velocity segment is determined by the total closing stroke of the physical shutter, the motion parameters of the first acceleration segment, and the motion parameters of the third buffer segment, the third buffer segment is started when the physical shutter moves to 5-15% of the total closing stroke, and the duration t 3 of the third buffer segment is 40-80 ms.
  4. 4. The VR device visual comfort transition method based on eyelid simulation of claim 1, wherein said adaptive progressive curve comprises an involute curve for switching from a virtual environment to a real environment, a gradually closing curve for switching from a real environment to a virtual environment; if the adaptive gradual change mode is entered, judging an environment switching direction, and selecting to execute an involute curve or a gradual closing curve based on the environment switching direction; The environment switching direction comprises switching from a virtual environment to a real environment and switching from the real environment to the virtual environment; Executing an involute curve when the environment switching direction is from a virtual environment to a real environment; and executing a gradually-closing curve when the environment switching direction is switched from the real environment to the virtual environment.
  5. 5. The VR device visual comfort transition method based on eyelid bionic as set forth in claim 4, wherein said involute curve employs a rapid positioning+exponential approach hybrid model, driving the opening of said physical shading component to switch from an initial opening s_start to an ending opening s_end, and s_start < s_end, said opening function of said physical shading component being configured to include a rapid positioning phase, an exponential approach phase performed in sequence; in the rapid positioning stage, in a first time interval [0, T_fast ], driving the physical shading component to be opened from an initial opening S_start to a first target opening S_fast; in the second time interval [ T_fast, ], driving the physical shading component to exponentially approach the ending opening S_end from the first target opening S_fast; The opening function of the index approaching stage is as follows: S(t) = S_fast + (S_end-S_fast) * [1- exp(-(t-T_fast)/τ)] where S (t) is the opening of the physical shading component at time t, and τ is the time constant.
  6. 6. The method for transitioning between visual comfort of a VR device based on eyelid simulation according to claim 5, wherein the duration t_fast of the rapid positioning stage is 300-400 ms, the first target opening s_fast is 70-80% of the total opening stroke of the physical light shielding component, and the time constant τ is in a range of 250-350 ms.
  7. 7. The VR device visual comfort transition method based on eyelid bionic as set forth in claim 4, wherein the gradually closing curve adopts an overall slow moving S-shaped velocity curve model, the opening of the physical shading component is driven to be switched from an initial opening s_start to an end opening s_end, and s_start > s_end, and the opening function of the physical shading component is as follows: S(t) = (S_start-S_end)/[1 + exp(h * (t - T_mid))] Where h is a shape factor, and t_mid is a time point corresponding to when the opening of the physical light shielding member reaches (s_start+s_end)/2.
  8. 8. The method of claim 7, wherein the shape factor is associated with a normalized average speed; h =4 * V_norm; Wherein h is a form factor, v_norm, a normalized average speed configured such that a total duration of the physical shade member from fully open to fully closed is no less than 1.5-2 seconds.
  9. 9. The method of claim 4, wherein the determining the direction of the environmental switch is based on one or more of user instructions, system status signals, and environmental awareness data.
  10. 10. A visual comfort transition control apparatus for a VR/AR device for implementing the method of any one of claims 1-9, comprising: the physical shading component is arranged on a light path between eyes of a user and the display unit; the driving unit is connected with the physical shading component and used for driving the physical shading component to execute opening and closing movement; A control unit in communication with the drive unit, the control unit configured to: Receiving an input instruction; If the protective instantaneous closing mode is entered, a protective instantaneous closing curve is executed, and the driving unit is controlled to drive the physical shading component to be rapidly closed from an opening state within 150 milliseconds to 250 milliseconds; and if the self-adaptive progressive mode is entered, executing an adaptive progressive curve, and controlling the driving unit to drive the physical shading component to open or close in a non-uniform motion mode, wherein the speed change curve of the non-uniform motion is designed based on a natural opening and closing motion rule of human eyelid and a pupil light reflection dynamic model.

Description

VR equipment visual comfort transition method and device based on eyelid bionic Technical Field The invention relates to the technical field of virtual reality man-machine interaction, in particular to a visual comfort transition method and device of VR equipment based on eyelid bionic. Background Virtual Reality (VR) headsets, while achieving an immersive experience, also present challenges in terms of visual comfort, especially when switching between virtual and real environments, users often feel dizziness, visual fatigue, or spatial lost due to the harshness of light switching. At present, the technical path for improving the visual experience of VR equipment is mainly focused on two aspects, namely the innovation of an interactive mode and the optimization of a light switching scheme. In an interactive manner, in order to provide a more intuitive control experience, the prior art proposes methods of inputting using biological features. For example, chinese patent application CN109753149a discloses a "VR glasses control method and apparatus", which collects user's eye movement data (including eyelid opening and closing data) through an identification unit, and compares the data with a pre-stored data template, so as to trigger a corresponding control instruction (such as interface sliding, and confirm selection). According to the scheme, physiological movement of eyelid is used as a control input signal, so that naturalness and convenience of interaction are improved. However, the core of this method is to "recognize" and "interpret" the active intention of the user to execute the software instructions, and it does not involve the management and adjustment of the physical light entering the eyes of the user itself, so that the problem of physiological discomfort caused by abrupt changes in light intensity during the environment switching cannot be solved. The current mainstream methods have inherent drawbacks in the technical solution of directly managing light. One type of scheme relies on electronic display technology, such as video perspective, which collects external images through a camera and renders the external images on a screen, and has image processing delay, perspective distortion and vision convergence adjustment conflict, which are easy to cause dizziness. Another type of scheme adopts photoelectric material for dimming, such as electrochromic lenses, but the cost is high although the light transmittance can be adjusted physically, and the light intensity change mode is usually switched instantaneously or linearly, which is seriously not matched with the precise and dynamic physiological adaptation process of the human visual system. The human visual system has evolved for hundreds of millions of years to form a perfect light adaptation mechanism which is cooperated by rapid opening and closing of eyelid and slow scaling of pupil, and the prior art uses the movement form as a control instruction and can not cooperate with the movement form at the light entrance. Therefore, a low cost solution that can simulate and cooperate with the physiological mechanisms of human primary vision at the physical level is needed to achieve a smooth transition between virtual and real environments without dizziness and with high comfort. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a visual comfort transition method and device for VR equipment based on eyelid simulation, which are characterized in that a bionic eyelid module controlled intelligently is arranged at a physical light path entrance between eyes of a user and a display unit of the VR equipment, and natural opening and closing dynamics of human eyelid are simulated, and the movement rule of the bionic eyelid module is strictly matched with the physiological adaptation speed of pupils, so that the light flux entering eyes is smoothly managed in physiological level. In order to achieve the above purpose, the invention is realized by the following technical scheme: a VR device visual comfort transition method based on eyelid bionics, comprising: Controlling a physical shading component arranged between eyes of a user and a display unit, and simulating opening and closing movement of human eyelid to manage eye-entering rays; the step of controlling specifically includes: Receiving an input instruction; according to the type of the input instruction, arbitrating and selecting to enter a protective instantaneous closing mode or an adaptive gradual change mode; if the protective transient closing mode is entered, executing a protective transient closing curve, and driving the physical shading component to be rapidly closed from an opening state within 150-250 milliseconds so as to provide active physical protection; And if the adaptive gradual change mode is entered, executing an adaptive gradual change curve, and driving the physical shading component to open or close in non-uniform motion, wher