CN116208757A - Method for adjusting naked eye 3D optimal viewing distance and intelligent terminal - Google Patents

Abstract

The invention discloses a method for adjusting an optimal naked eye 3D viewing distance and an intelligent terminal. The method is applied to an intelligent terminal, the intelligent terminal comprises a display screen, and a 3D optical film is covered on the display screen, and the method comprises the following steps: s1, acquiring spatial position information of human eyes in front of a display screen; s2, calculating a corresponding target optimal viewing distance according to the space position information; s3, obtaining a target grating constant of the 3D optical film according to the target optimal viewing distance; and S4, rotating the 3D optical film according to the target grating constant so as to adjust the optimal viewing distance corresponding to the 3D optical film to the target optimal viewing distance. By implementing the method for adjusting the naked eye 3D optimal viewing distance, the target optimal viewing distance is determined by acquiring the spatial position information of human eyes, and the optimal viewing distance corresponding to the 3D optical film is adjusted to the target optimal viewing distance by rotating the 3D optical film, so that the viewing experience can be ensured when a user moves forwards and backwards.

Description

Method for adjusting naked eye 3D optimal viewing distance and intelligent terminal

Technical Field

The invention relates to the field of naked eye 3D, in particular to a method for adjusting the optimal viewing distance of naked eye 3D and an intelligent terminal.

Background

The naked eye 3D display technology does not need a user to wear 3D glasses for watching, when watching naked eye 3D content, the pupil distance between two eyes of a viewer generates position deviation, left eyes and right eyes respectively see two similar but slightly different images, and after the two images are fused through brain vision, a three-dimensional effect is finally formed. The viewing range of the naked eye 3D display device is often fixed after the fabrication is completed. If a user wants to watch clear and effective 3D content, the user needs to move both eyes into the watching range and cannot freely change. When the eyes of the user move left and right or are too close to the display screen, the problem of image crosstalk is very easy to generate; when the eyes of the user are far away from the display screen, the problems of low picture definition, unobvious 3D effect and the like can be caused.

The currently disclosed improvement method solves the problem that the left-right lateral movement is limited when a user views naked eye 3D content by performing 3D image arrangement displacement, but the longitudinal viewing distance of the user relative to a display screen of a display device is still limited, the longitudinal viewing distance of human eyes and the display screen still needs to be kept within a small range to view clear content, particularly in a scene of the mobile display device, the relative position change of the human eyes and the display device is frequently complicated, and when the longitudinal change range of the human eyes is overlarge, the clear 3D content cannot be seen, so that the viewing experience of the user is poor.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method for adjusting the 3D optimal viewing distance of naked eyes.

The technical scheme adopted for solving the technical problems is as follows: the method for constructing the 3D optimal viewing distance of the naked eyes is applied to an intelligent terminal, the intelligent terminal comprises a display screen, and a 3D optical film is covered on the display screen, and the method comprises the following steps:

s1, acquiring the spatial position information of human eyes in front of the display screen;

s2, calculating a corresponding target optimal viewing distance according to the space position information;

s3, obtaining a target grating constant of the 3D optical film according to the target optimal viewing distance;

and S4, rotating the 3D optical film according to the target grating constant to adjust the grating constant of the 3D optical film to be consistent with the target grating constant, so as to adjust the optimal viewing distance corresponding to the 3D optical film to the target optimal viewing distance.

Preferably, the step S4 includes:

obtaining a target rotation angle of the 3D optical film according to the target grating constant;

and rotating the 3D optical film according to the target rotation angle.

Preferably, the rotating the 3D optical film step according to the target rotation angle includes:

and judging whether the target rotation angle accords with a preset angle range, and if so, rotating the 3D optical film according to the target rotation angle.

Preferably, before the step S2, the method further includes:

and judging whether the human eyes are in a preset normal viewing range or not according to the space position information, and if so, executing the step S2.

Preferably, the step S2 includes:

calculating a corresponding target effective visual area according to the space position information;

and obtaining the optimal sight distance of the target according to the longitudinal length range of the effective sight area of the target.

Preferably, the step S1 includes:

acquiring image information in front of the display screen through a camera;

and acquiring the spatial position information of the human eyes according to the image information.

Preferably, the step S1 includes: acquiring the space position information of human eyes in front of the display screen according to a preset time interval; or (b)

And after receiving an adjustment instruction for adjusting the optimal viewing distance corresponding to the 3D optical film, the intelligent terminal executes the steps S1 to S4.

The invention also constructs an intelligent terminal, wherein a 3D optical film is covered on a display screen of the intelligent terminal, the intelligent terminal comprises a processor and a memory, and the processor is respectively in communication connection with the memory and the 3D optical film;

the memory is used for storing a computer program;

the processor is configured to execute the computer program in the memory to implement the method for adjusting the 3D best viewing distance of the naked eye according to any one of the above.

Preferably, the 3D optical film is a lenticular optical film or a barrier parallax optical film; the display screen is a liquid crystal display screen or an organic light-emitting semiconductor display screen.

Preferably, the intelligent terminal is one or more of a smart phone, a computer, a smart television, a vehicle-mounted terminal, an advertisement machine and a game machine.

The method for adjusting the naked eye 3D optimal viewing distance has the following beneficial effects: the optimal sight distance of the target is determined by acquiring the space position information of the human eyes, and the optimal sight distance corresponding to the 3D optical film is adjusted to the optimal sight distance of the target by rotating the 3D optical film, so that the watching experience can be ensured when the user moves forwards and backwards.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a flow chart of a method for adjusting an optimal viewing distance of naked eyes according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the method for adjusting the 3D best viewing distance of the naked eye before and after the best viewing distance adjustment according to an embodiment of the present invention;

FIG. 3 is a diagram showing a comparison of the front and rear of the adjustment of the rotation angle of the grating according to an embodiment of the method for adjusting the 3D best viewing distance of the naked eye of the present invention;

fig. 4 is a comparison diagram of the grating rotation angle adjustment before and after the adjustment of the naked eye 3D best viewing distance according to an embodiment of the present invention.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.

The method for adjusting the naked eye 3D optimal viewing distance is applied to the intelligent terminal, the 3D optical film is covered on the display screen of the intelligent terminal, and the 3D optical film can be integrated on the display screen in the production process of the intelligent terminal or can be stuck to the display screen after the intelligent terminal is generated. The 3D optical film can be controlled to rotate, so that the display effect of the 3D optical film is adjusted; alternatively, the 3D optical film may be an electron-column-mirror-grating optical film, an electron-barrier parallax-grating optical film, or the like, and the structures of the electron-column-mirror-grating optical film and the electron-barrier parallax-grating optical film may refer to the prior art; the display screen is a Liquid Crystal Display (LCD) or an organic light emitting semiconductor display (OLED). The intelligent terminal performs image arrangement processing on the 3D content according to a preset algorithm, the processed 3D content is displayed on a display screen, light rays for displaying images enter eyes of a user through a 3D optical film, left eyes of the user see left viewpoint content, right eyes of the user see right viewpoint content, the left eyes and the right eyes see images to generate 3D stereoscopic impression in brains of the user, and the user can see 3D stereoscopic images. Alternatively, the smart terminal includes, but is not limited to, a smart phone, a tablet, a computer, a smart television, a vehicle-mounted terminal, an advertisement machine, a game machine, etc., that is, a terminal having a video playing function. The 3D content includes 3D pictures, 3D videos, 3D games, and the like.

As shown in fig. 1, the method for adjusting the 3D best viewing distance of the naked eye in this embodiment includes the following steps:

s1, acquiring the spatial position information of human eyes in front of a display screen. Specifically, the positions of the display screen and the 3D optical film of the intelligent terminal are relatively fixed, the display screen and the 3D optical film can be established in the same space coordinate system with human eyes, when a user watches, the position of the human eyes in front of the display screen can be obtained through a common technical means, and then the distance between the human eyes and the display screen and the distance between the human eyes and the 3D optical film can be obtained through calculation.

In an alternative embodiment, step S1 includes: acquiring image information in front of a display screen through a camera; and acquiring the spatial position information of human eyes according to the image information. Specifically, the camera can be used for acquiring the spatial position information of the eyes, and the camera can be arranged on the intelligent terminal or at a certain fixed position outside the intelligent terminal. Because the position parameters of the camera are known, the image parameters acquired by the camera are known, the camera is used for photographing the front of the display screen to obtain image information, the image information is subjected to human eye recognition, the information such as the relative distance and the relative height between the left eye and the right eye in the photo can be obtained, and then the information is calculated with the preset standard off-screen distance, the standard pupil distance and the like, the space position coordinates of the left eye and the right eye can be obtained respectively, and the space position coordinates of the binocular center point can be obtained.

In an alternative embodiment, before step S2, the method further includes: and judging whether the human eyes are in a preset normal viewing range according to the space position information, and if so, executing step S2. Specifically, the viewing effect of naked eye 3D can be affected when the distance between the user and the display screen is too short, too long or the viewing angle is too biased, image crosstalk can be caused when the user is too short, the definition of the picture can be reduced, the 3D effect disappears when the user is too long, and the viewing angle of the user is too biased, so that the viewed display content can be distorted. According to the space position coordinates of the binocular central point and the space position of the display screen, the distance or the relative angle between human eyes and the display screen can be obtained, and whether the user is in a normal viewing range can be further judged. Assuming that the normal viewing range of a certain intelligent terminal is 30-100 cm in front of the display screen, when the distance between human eyes and the display screen is 20cm or 200cm according to the space position information, the user is judged to have exceeded the normal viewing range, and then the intelligent terminal can send out a prompt to prompt the user to return to the normal viewing range.

S2, calculating the corresponding optimal sight distance of the target according to the space position information. Specifically, when the human eyes are in the range of the viewing distance which is the optimal viewing distance, the 3D effect watched by the user is the best and the picture is the clearest. When the distance between the human eyes and the display screen changes, the corresponding optimal viewing distance also changes. According to the space position coordinates of the binocular central points, the distance between the human eyes and the 3D optical film and the distance between the human eyes and the display screen can be obtained, and then calculation is carried out according to the initial grating constant, the inclination angle, the grating radian, the preset row pattern length of the display screen and other data of the 3D optical film, so that the optimal viewing distance of the human eyes corresponding to the current space position relative to the display screen can be obtained, namely the optimal viewing distance of the target, which is obtained by adjusting the 3D optical film, is needed. For example, when the human eye is in a normal viewing range and the target optimal viewing distance is in a range of 40-60 cm from the screen when the distance between the human eye and the display screen is 50cm, the human eye can have the best viewing experience when moving in a range of 10cm from front to back of the distance when the distance between the user and the display screen is 50 cm.

In an alternative embodiment, step S2 includes: calculating a corresponding target effective visual area according to the space position information; and obtaining the optimal sight distance of the target according to the longitudinal length range of the effective visual area of the target. Specifically, the effective view area refers to a movable area range in which a 3D image can be viewed when the human eye is at a certain spatial position. The effective visual area of the target at the spatial position can be obtained according to the spatial position coordinates of the binocular central point, the longitudinal length range of the effective visual area of the target can be used as the optimal visual distance of the target, and a part of the longitudinal length range of the effective visual area of the target can be selected as the optimal visual distance of the target. As shown in fig. 2, the distance between the display screen and the 3D optical film is fixed, a is a preset unit line graph length, E1 is the binocular central point position before adjustment, E2 is the binocular central point position after adjustment, P1 is the effective viewing zone before adjustment, P2 is the effective viewing zone after adjustment, K1 is the distance between the effective viewing zone before adjustment and the 3D optical film, K2 is the distance between the effective viewing zone after adjustment and the 3D optical film, H1 is the longitudinal length range of the effective viewing zone before adjustment, H2 is the longitudinal length range of the effective viewing zone after adjustment, R1 is the optimal viewing distance before adjustment, and R2 is the optimal viewing distance after adjustment.

And S3, obtaining a target grating constant of the 3D optical film according to the target optimal viewing distance. Specifically, when the human eyes move back and forth relative to the screen, the correspondence of the screen, the grating and the optimal viewing distance of the human eyes is broken. As shown in fig. 2, x is the grating constant before adjustment, and y is the grating constant after adjustment; when the human eye moves from the position E1 to the position E2, if x is taken as the grating constant of the 3D optical film, the optimal viewing distance R1 corresponding to the optical film cannot meet the viewing requirement, the target optimal viewing distance R2 is required to be obtained according to the spatial position information of the position E1, the target grating constant y is calculated according to the target optimal viewing distance R2 through a preset corresponding relation built-in algorithm, and when the grating constant of the 3D optical film is adjusted to y, the optimal viewing distance displayed by the intelligent terminal is also adjusted to P2, so that the human eye is continuously in the optimal viewing distance range. In general, the closer the human eye is to the display screen, the greater the target grating constant required.

And S4, rotating the 3D optical film according to the target grating constant so as to adjust the optimal viewing distance corresponding to the 3D optical film to the target optimal viewing distance. Specifically, the grating constant refers to the distance between two adjacent grating lines on the horizontal line, and by changing the inclination angle of the grating, the distance between two adjacent grating lines on the horizontal line can be changed, and when the grating constant of the 3D optical film is adjusted to be consistent with the target grating constant, the optimal viewing distance of the 3D optical film is also adjusted to be the target optimal viewing distance.

In an alternative embodiment, step S4 includes: obtaining a target rotation angle of the 3D optical film according to the target grating constant; the 3D optical film is rotated according to the target rotation angle. As shown in fig. 3 and 4, the 3D optical film is disposed in front of the display screen and rotates on a plane parallel to the display screen. Wherein the display screen of fig. 3 is an LCD display screen, and the display screen of fig. 4 is an OLED display screen. L1 is a preset grating constant when the 3D optical film does not rotate, x is a grating constant before adjustment, beta is a corresponding rotation angle when the grating constant is equal to x, y is an adjusted grating constant, and alpha is a corresponding rotation angle when the grating constant is equal to y. The 3D optical film is connected to a rotation mechanism which can control the 3D optical film to rotate by a corresponding angle on a plane parallel to the display screen according to a target rotation angle, and the rotation mechanism can refer to the prior art. The grating rotation angle before rotation is beta, a corresponding target rotation angle alpha can be obtained according to a target grating constant y, then the target rotation angle alpha is sent to a rotation mechanical device connected with the 3D optical film, and the rotation mechanical device drives the 3D optical film to rotate to the rotation angle alpha. The corresponding rotation angle can be obtained according to the grating constant, and the formula is as follows:

further, the rotating the 3D optical film according to the target rotation angle includes: and judging whether the target rotation angle accords with a preset angle range, and if so, rotating the 3D optical film according to the target rotation angle. Specifically, according to the above calculation formula, when the rotation angle is 45 °, 135 °, 225 ° or 315 °, the grating constants corresponding to them are equal, that is, the same grating constant corresponds to four rotation angles, so that it is impossible to determine which rotation angle to use for adjustment, and therefore, in order to avoid collision, the rotation angle may be limited to 0 ° -90 °. Further, since the oblique grating can balance the loss of the resolution of the parallax image in the horizontal and vertical directions and reduce the influence of color moire, it is necessary to avoid the rotation angle of the grating to be 0 ° or 90 °. Therefore, the 3D optical film is rotated after the preset angle range is set to be greater than 0 ° and less than 90 °, and it is necessary to determine that the target rotation angle corresponds to the preset angle range. Within this range, the larger the rotation angle of the grating, the larger the grating constant.

In an alternative embodiment, step S1 includes: acquiring the space position information of human eyes in front of a display screen according to a preset time interval; or the intelligent terminal receives an adjustment instruction for adjusting the optimal viewing distance corresponding to the 3D optical film and then executes the steps S1 to S4. Specifically, when playing 3D content, the distance between the user and the display screen is continuously changed, so that the grating constant of the 3D optical film needs to be adjusted in time to adjust the optimal viewing distance, thereby providing a good viewing experience for the user. In the process of playing 3D content, the intelligent terminal can acquire the space position information of human eyes in front of the display screen at preset time intervals at regular intervals, so as to adjust the optimal viewing distance, wherein the preset time intervals can be 10 seconds, 20 seconds, 30 seconds and the like. Or, the adjustment may be performed after receiving an adjustment instruction, where the adjustment instruction may be issued by a user through a physical key, a virtual key, or a voice, or may be issued after evaluating a display screen of the intelligent terminal by a specific monitoring device.

According to the method for adjusting the naked eye 3D optimal viewing distance, the target optimal viewing distance is determined by acquiring the spatial position information of human eyes, and the optimal viewing distance corresponding to the 3D optical film is adjusted to the target optimal viewing distance by rotating the 3D optical film, so that the viewing experience can be ensured when a user moves forwards and backwards. According to the method, the optimal viewing distance of the intelligent terminal can be flexibly adjusted, and when the relative position of the user and the intelligent terminal is close or far, the optimal viewing distance provided by the intelligent terminal can be adjusted by rotating the 3D optical film, so that a larger adjustment range of the longitudinal viewing distance can be provided, and the viewing experience of the user is improved.

In one embodiment of the intelligent terminal, a 3D optical film is covered on a display screen of the intelligent terminal, the intelligent terminal comprises a processor and a memory, and the processor is respectively in communication connection with the memory and the 3D optical film; the memory is used for storing a computer program; the processor is configured to execute the computer program in the memory to implement any of the above methods for adjusting the 3D best viewing distance of the naked eye. Specifically, the display screen of the intelligent terminal is covered with the 3D optical film, and the 3D optical film can be integrated on the display screen in the production process of the intelligent terminal or can be stuck to the display screen after the intelligent terminal is generated. The Memory may be a usb disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk. The memory stores a computer program which, when executed by the processor, implements the steps of the method of adjusting the 3D best viewing distance of the naked eye described above. It should be appreciated that in embodiments of the present application, the processor may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. Wherein the general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Further, the 3D optical film is a lenticular optical film or a barrier parallax optical film; the display screen is a liquid crystal display screen or an organic light-emitting semiconductor display screen. The 3D optical film can be controlled to rotate, so that the display effect of the 3D optical film is adjusted; alternatively, the 3D optical film may be an electron-column-mirror-grating optical film, an electron-barrier parallax-grating optical film, or the like, and the structures of the electron-column-mirror-grating optical film and the electron-barrier parallax-grating optical film may refer to the prior art; the display screen is a Liquid Crystal Display (LCD) or an organic light emitting semiconductor display (OLED). The intelligent terminal performs image arrangement processing on the 3D content according to a preset algorithm, the processed 3D content is displayed on a display screen, light rays for displaying images enter eyes of a user through a 3D optical film, left eyes of the user see left viewpoint content, right eyes of the user see right viewpoint content, the left eyes and the right eyes see images to generate 3D stereoscopic impression in brains of the user, and the user can see 3D stereoscopic images.

Further, the intelligent terminal is one or more of a smart phone, a computer, a smart television, a vehicle-mounted terminal, an advertisement machine and a game machine. Alternatively, the smart terminal includes, but is not limited to, a smart phone, a tablet, a computer, a smart television, a vehicle-mounted terminal, an advertisement machine, a game machine, etc., that is, a terminal having a video playing function. The 3D content includes 3D pictures, 3D videos, 3D games, and the like.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same according to the content of the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made with the scope of the claims should be covered by the claims.

Claims (10)

1. The method for adjusting the naked eye 3D optimal viewing distance is applied to an intelligent terminal, the intelligent terminal comprises a display screen, and a 3D optical film is covered on the display screen, and is characterized by comprising the following steps:

s1, acquiring the spatial position information of human eyes in front of the display screen;

s2, calculating a corresponding target optimal viewing distance according to the space position information;

s3, obtaining a target grating constant of the 3D optical film according to the target optimal viewing distance;

and S4, rotating the 3D optical film according to the target grating constant so as to adjust the optimal viewing distance corresponding to the 3D optical film to the target optimal viewing distance.

2. The method for adjusting the 3D best viewing distance of the naked eye according to claim 1, wherein the step S4 comprises:

obtaining a target rotation angle of the 3D optical film according to the target grating constant;

and rotating the 3D optical film according to the target rotation angle.

3. The method of adjusting the 3D best viewing distance of the naked eye according to claim 2, wherein the rotating the 3D optical film step according to the target rotation angle comprises:

and judging whether the target rotation angle accords with a preset angle range, and if so, rotating the 3D optical film according to the target rotation angle.

4. The method for adjusting the best viewing distance of the naked eye 3D according to claim 1, further comprising, before step S2:

and judging whether the human eyes are in a preset normal viewing range or not according to the space position information, and if so, executing the step S2.

5. The method for adjusting the 3D best viewing distance of the naked eye according to claim 1, wherein the step S2 comprises:

calculating a corresponding target effective visual area according to the space position information;

and obtaining the optimal sight distance of the target according to the longitudinal length range of the effective sight area of the target.

6. The method for adjusting the 3D best viewing distance of the naked eye according to claim 1, wherein the step S1 comprises:

acquiring image information in front of the display screen through a camera;

and acquiring the spatial position information of the human eyes according to the image information.

7. The method for adjusting the 3D best viewing distance of the naked eye according to claim 1, wherein the step S1 comprises: acquiring the space position information of human eyes in front of the display screen according to a preset time interval; or (b)

And after receiving an adjustment instruction for adjusting the optimal viewing distance corresponding to the 3D optical film, the intelligent terminal executes the steps S1 to S4.

8. The intelligent terminal is characterized in that a 3D optical film is covered on a display screen of the intelligent terminal, the intelligent terminal comprises a processor and a memory, and the processor is respectively in communication connection with the memory and the 3D optical film;

the memory is used for storing a computer program;

the processor is configured to execute a computer program in the memory to implement the method of adjusting an open hole 3D best viewing distance according to any one of claims 1 to 7.

9. The intelligent terminal of claim 8, wherein the 3D optical film is a lenticular or barrier parallax barrier optical film; the display screen is a liquid crystal display screen or an organic light-emitting semiconductor display screen.

10. The intelligent terminal of claim 8, wherein the intelligent terminal is one or more of a smart phone, a computer, a smart television, a vehicle-mounted terminal, an advertisement machine, and a game machine.

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