A. Technical Field
The present invention relates to a stereovision optometry apparatus and in particular to a stereovision optometry apparatus to check an individual stereovision condition.
B. Background of the Invention
Stereovision is one of the most important factors when 3D content is perceived. Stereovision is a phenomenon in which two images are combined into one image to provide a three-dimensional perception when two images for a particular object are viewed in such a manner one left eye takes a view of a left image and the other right eye takes a view of a right image at a visual range (approximately 25 cm).
Recently, 3D content is in high demand as 3D movies or 3D display devices such as 3D TV emerge. However, statistics show that about 15% of the population do not perceive or enjoy the three-dimensional effect.
Stereovision optometry apparatus or other device for 3D content which is being used or sold is able to detect only the presence of stereovision, not a degree in which an individual perceives, i.e., a degree in which an individual perceives content in three-dimensional.
An object of the present invention is to solve the above problems and to provide a stereovision optometry apparatus to determine an individual perception of stereovision accurately and precisely.
An object of the present invention is to solve the above problems and to provide a stereovision optometry apparatus to determine an individual perception of stereovision accurately and precisely.
An object of the present invention is to solve the above problems and to provide a stereovision optometry apparatus to determine an individual perception of stereovision accurately and precisely.
An object of the present invention is to solve the above problems and to provide a stereovision optometry apparatus to determine an individual perception of stereovision accurately and precisely.
According to the invention, a stereovision optometry apparatus to determine an individual perception of stereovision accurately and precisely is provided.
Therefore, the invention can be applied to examine ophthalmic diseases according to stereovision perception. In case of a 3D display apparatus such as 3D TV, reference information about 3D image suitable for each viewer can be provided to each viewer, thereby a 3D display apparatus which controls a protrusion angle is implemented.
Further advantages of the invention are described in the following exemplary embodiments. There is showing:
Hereinafter, preferred embodiments will be explained in detail referring to attached drawings.
As shown in
The 3D display unit 130 displays a 3D image. In one example of the present invention, as shown in
The reference 2D display unit 120 displays a reference 2D image. In one example of the invention, as shown in
Therefore, the reference 2D image from the reference 2D display unit 120 and the 3D image from the 3D display unit intersect and the half mirror 140 is arranged at the point where the two images intersect as shown in
The eyepiece 110 is installed on the frame body 170 in such a manner that it is arranged in opposite side of the reference 2D display unit 120. Here, a viewer watches a reference 2D image from the reference 2D display unit 120 and a 3D image from the 3D display unit by means of two view holes 111 formed in the eyepiece 110. Also, a polarizing lens to watch a 3D image may be arranged in the view holes 111.
As shown in
The half mirror 140 is disposed between the 3D display unit 130 and the reflective mirror 150 and is arranged in the frame body 170 in such a manner that it is disposed in the area where a propagation path of the reference 2D image and a propagation path of the 3D image intersect as described above.
Referring to
The propagation path of the reference 2D image is represented by dotted lines in
The continuous lines in
The propagation path of the 3D image from the 3D display unit 130 and the propagation path of the reference 2D image from the reference 2D display unit 120 respectively are arranged in such a manner that they cross at right angles and the half minor 140 is arranged in such a manner that it has an inclination of 45° with respect to the propagation path of the reference 2D image and the propagation path of the 3D image.
As such, user is able to watch the 3D image and the reference 2D image simultaneously through the eyepiece 110 and a three-dimensional effect varies according to the movement of the reflective minor 150 toward and/or away from the 3D display unit, i.e., according to the upward and downward movement of the reflective mirror, which will be described in detail below.
The reflective mirror 150 moves toward and/or away from the 3D display unit 130 along the propagation path of the 3D image by the actuation of minor-movement means 161, 162, 163, 164 for moving the reflective mirror. The mirror-movement means 161, 162, 163, 164 are operated by the use of a ball screw and may comprise a ball screw 162, a ball nut 163, and a driving motor 161 as shown in
The ball screw 162 is arranged along the movement of the reflective mirror 150 toward and/or away from the 3D display unit, i.e., along the upward and/or downward direction in
The minor-movement means 161, 162, 163, 164 comprise at least one guide bar 164 which is arranged along the moving direction of the reflective mirror 150 to guide the reflective minor 150 toward or away from the 3D display unit.
The reflective mirror 150 is provided with a plurality of through-holes into which the ball screw 162 and the guide bar 164 penetrate so that the reflective minor 150 moves back and forth. The through-holes are formed on the edges of the reflective minor 150 to prevent them from affecting the 3D image reflected from the reflective minor 150.
Hereinafter, the method for checking an individual stereovision condition using the stereovision optometry apparatus according to the invention will be described in detail.
Here, when the reflective mirror 150 is located closest to the 3D display unit 130, the reflective minor is arranged in such a manner that the length of the propagation path of the 3D image from the 3D display unit to the eyepiece 110 is the same as the length of the propagation path of the reference 2D image from the reference 2D display unit to the eyepiece 110.
Referring to
Then, when the reflective minor 150 moves away from the 3D display unit 130 by the actuation of mirror-movement means 161, 162, 163, 164, the propagation length of the 3D image becomes longer than that of the reference 2D image.
In a natural viewing condition, eyes focus on the screen. Here, the difference between a convergence angle a and an accommodation angle β is referred to as a protrusion angle η and ΔD in
The stereovision optometry apparatus 100 according to the invention is provided to identify an error or a deviation between the theoretical degree of the protrusion, i.e., the protrusion angle and the protrusion distance, and the degree of protrusion experienced by a viewer and to find the degree of an individual's perception of stereovision.
In case that the length of the propagation path of the 3D image is the same as the length of the propagation path of the reference 2D image as shown in
When the reflective mirror 150 moves downward, the protrusion degree of the 3D image, i.e., the depth of the 3D image varies and then a viewer finds a point where the reference 2D image is identical to the 3D image. As shown in
Meanwhile, the placement of the reference 2D image and the 3D image is very important for the accurate measurement. As shown in
When the reference 2D image and the 3D image are arranged horizontally, eye's geometric structure with regard to the reference 2D image and the 3D image will be varied significantly. For example, if a viewer focuses on the reference 2D image, the reference 2D image may be often recognized as a 3D image. Therefore, the reference 2D image and the 3D image are arranged vertically on the eyepiece 110.
Referring back to
Moreover, the stereovision optometry apparatus 100 according to the invention may further comprise an information display 182 which displays stereovision information corresponding to the position of the reflective mirror 150 relative to the 3D display unit.
Therefore, a viewer is able to move the reflective mirror 150 upward and/or downward by the user controller 181 while viewing the images through the eyepiece 110 and also is able to see information as to the degree of his or her own stereovision by the information display 182.
It is intended that the foregoing description has described only a few of the many possible implementations of the present invention, and that variations or modifications of the embodiments apparent to those skilled in the art are embraced within the scope and spirit of the invention.
Number | Date | Country | Kind |
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1020130009063 | Jan 2013 | KR | national |
The application claims the benefit of Korean Application Serial No. 10 2013 0009063, entitled “Stereovision Optometry Apparatus”, filed on Jan. 28, 2013, the subject matter of which is incorporated herein by reference.