KR102002690B1 - Optics device having eyesight correction - Google Patents

Abstract

The present invention improves an optical device of a head mount display that outputs an image by wearing on the face of a user and adjusts the eye correction lens according to the user's visual acuity so that a vision correction And an object thereof is to provide a possible optical device. In order to achieve the above object, the present invention provides an image display apparatus, comprising: an optical system for changing a light path of an image output through a display panel to be displayed to a user, wherein the correction lens unit is movably provided in the optical system, And the dioptric power of the optical system is adjusted. Accordingly, the present invention is advantageous in that a user with poor eyesight can comfortably use the lens without wearing glasses by adjusting the lens for correction of vision according to the user's visual acuity.

Description

[0001] OPTICAL DEVICE HAVING EYESIGHT CORRECTION [0002]

The present invention relates to an optical device capable of correcting visual acuity, and more particularly, to an optical device of a head-mounted display for outputting an image by worn on a face of a user to adjust a lens for correction according to a user's visual acuity, To an optical apparatus capable of correcting the visual acuity so that even a bad user can wear comfortably without glasses.

The head mount display device displays an image input from an external input device such as a video device, a TV, or a computer, and is configured to allow a user to enjoy a larger image in a state wearing on the face or head will be.

A structure of a conventional head-mounted display device in which an image signal input from the outside is displayed by an LCD will be described with reference to FIG.

A typical head-mounted display device includes a main body 10 composed of a main body frame 11 and a support frame 12, a display panel 20 installed on the main body frame 11 to output an image, And an optical system 30 for changing the optical path of the image output through the display panel unit 20 and displaying the changed optical path to the user.

However, in the conventional general head-mounted display device, since the user can not recognize the external environment at all during use, there has been a need for recognition of the external environment during use, and in response to this, A head-mounted display device having a see-through function capable of making a through-view of a head-mounted display device has been developed.

Korean Patent Laid-Open Publication No. 10-1998-084798 (titled as an HMD having a pair of display portions) is configured to recognize an image due to an external environment in addition to an image displayed on an LCD incorporated in use , The image of the external environment can be introduced into the inside of the transmission path for the video signal of the LCD.

2 is a cross-sectional view illustrating an optical system structure of a see-through type head-mounted display device according to the related art. The LCD 21 includes a circuit portion for processing an image signal input from the outside, A display panel unit 20 having an enlargement lens 22 for enlarging an image output from the display panel unit 20 and a display panel unit 20 for changing an optical path of an image output from the display panel unit 20, The optical system 30 including the prism 31 and the second prism 32 is configured to allow the user to view the image through the display panel unit 20 and to view the image of the external environment.

However, such a conventional head-mounted display device has a problem that its visual acuity deteriorates and its use is restricted for a user wearing glasses.

In addition, in order to use the glasses in a naked state, a separate contact lens can be used after being worn, which makes it difficult to use the glasses.

Korean Patent Laid-Open Publication No. 10-1998-084798 (entitled " HMD with a pair of display portions "

In order to solve such a problem, the present invention improves an optical device of a head mount display which outputs an image by worn on the face of a user, and adjusts the lens for correcting the visual acuity according to the visual acuity of the user, And it is an object of the present invention to provide an optical device which can perform wearable vision correction.

According to an aspect of the present invention, there is provided a display apparatus including a display panel, an optical system for changing a light path of an image output through the display panel to be displayed to a user, a correction lens unit movably installed in the optical system, And the dioptric power of the optical system is adjusted according to the visual acuity of the user.

Further, the optical device according to the present invention is a head mount display.

The optical system according to the present invention further includes a pair of first and second lens units for changing a light path of an image output from the display panel to be displayed to a user; A beam splitter provided between the first and second lens units for transmitting a part of the image light output from the first lens unit to the second lens unit and reflecting the remaining image light in a direction perpendicular to the transmitted image light; A first correction lens unit provided on the first lens unit side; A second correction lens unit provided on the second lens unit side; An upper lens unit installed on the first lens unit and movably supporting the first and second correction lens units; And a lower lens unit provided below the second lens unit and movably supporting the first and second correction lens units.

The first correcting lens unit according to the present invention is characterized in that it is made of either a convex lens or a concave lens.

Further, the second correction lens unit according to the present invention is characterized in that it is made of either a convex lens or a concave lens.

In addition, the first and second correction lens units according to the present invention are cylindrical or toric lenses whose curvature decreases from one side to the other.

According to another aspect of the present invention, there is provided an optical device comprising: a frame part for supporting an optical system; And a control knob that is interlocked with the first and second correction lens units on one side of the frame unit to adjust the positions of the first and second correction lens units.

According to another aspect of the present invention, there is provided an optical device comprising: a frame part for supporting an optical system; An input unit installed at one side of the frame unit for detecting a position movement signal of the first and second correction lens units from a user; A controller for outputting a driving signal to the actuator according to the detected movement signal; And an actuator unit interlocked with the first and second correction lens units and operated to adjust the positions of the first and second correction lens units according to the driving signals.

The optical apparatus according to the present invention may further include a visual acuity detection unit installed in the frame unit for detecting visual acuity information of the user and outputting the visual acuity information to the control unit.

The present invention is advantageous in that a user with a poor visual acuity can comfortably use the device without wearing glasses by adjusting the lens for correcting the visual acuity according to the user's visual acuity.

1 is a perspective view showing a general head-mounted display device;
2 is a cross-sectional view showing the optical system structure of a conventional head-mounted display device.
3 is a perspective view showing an embodiment of an optical device capable of correcting the visual acuity according to the present invention.
4 is a perspective view showing an optical system of an optical device capable of correcting visual acuity according to the present invention.
5 is an exploded perspective view showing the configuration of the optical system according to Fig.
6 is a cross-sectional view showing a structure of an optical system according to Fig. 3;
7 is a perspective view showing another embodiment of the optical device capable of correcting the visual acuity according to the present invention.
8 is a block diagram showing the configuration of an optical device capable of correcting visual acuity according to Fig. 7;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

(Embodiment 1)

4 is a perspective view showing an optical system of an optical device capable of correcting visual acuity according to the present invention, FIG. 5 is a perspective view of an optical system according to the present invention, FIG. 6 is a cross-sectional view showing the structure of the optical system according to FIG. 3; FIG.

3 to 6, the optical device 100 according to the first embodiment includes an optical system 110 for changing the optical path of an image output through a display panel (not shown) to be displayed to a user And a correction lens unit is movably provided on the optical system 110. The correction lens unit is moved to adjust the dioptric power of the optical system 110 according to a user's visual acuity.

In addition, the optical device 100 may include an optical system 110, a frame unit 120, and a display unit 120 to adjust the position of the lens according to a user's visual acuity so that a user with poor eyesight can comfortably use the apparatus without wearing glasses. And an adjustment knob 130. [

The optical system 110 is configured to change the optical path of an image output through a display panel (not shown) to be displayed to a user and adjust the power of the optical system 110 according to a user's visual acuity. The first lens unit 111 and the second lens unit 112, the beam splitter 113, the first correction lens unit 114, the second correction lens unit 115, the upper lens unit 116, (117).

The pair of first and second lens units 111 and 112 change the optical path of the image output from the display panel to be displayed on the user's eyes.

The first and second lens units 111 and 112 may be formed of an optical system including a prism that changes the optical path of an image output from the display panel so as to form an image on a user's eye.

The beam splitter 113 is provided between the first and second lens units 111 and 112 to transmit a part of the image light output from the first lens unit 111 to the second lens unit 112, The image light is reflected in a direction perpendicular to the transmitted image light and is output in the eye direction of the user.

The first correction lens unit 114 is provided on the first lens unit 111 side and changes the refractive power of the optical system 110 together with the second correction lens unit 115 so that a user with a poor visual acuity, .

The first correction lens unit 114 may be formed of any one of a convex lens and a concave lens, and the first correction lens unit 114 may have a curvature magnitude and a thickness t1 at one end and a magnitude of curvature at the other end, And the thickness t2 are different from each other and preferably the cylinder shape or the curvature in which the size and the thickness of the curvature are decreased from one side to the other side or the toric having the different longitudinal curvature Ra and the lateral curvature Rb, Lens.

The longitudinal curvature Ra and the transverse curvature Rb are configured by the following condition Ra ≠ Rb or Ra> 0, Ra <0 or Rb = 0.

The first correction lens unit 114 is provided with a first correction lens guide unit 114a at its upper and lower portions so that the first correction lens unit 114 can move in a horizontal direction.

The second correction lens unit 115 is provided on the second lens unit 112 side and changes the refractive power of the optical system 110 together with the first correction lens unit 114 so that a user with poor visual acuity is able to adjust the refractive power of the optical system 110, .

The second correcting lens unit 115 may be formed of any one of a convex lens and a concave lens, and the second correcting lens unit 115 may have a curvature magnitude and a thickness at one end of the curvature of the other end, A cylinder shape in which the size and thickness of the curvature are reduced from one side to the other side, and a toric lens in which the longitudinal curvature Ra and the lateral curvature Rb are different from each other.

The toric lens is constituted by the following condition Ra ≠ Rb or Ra> 0, Ra <0 or Rb = 0.

The second correction lens unit 115 includes a first correction lens guide unit 115a disposed at the upper and lower portions thereof and configured to move the second correction lens unit 115 in the horizontal direction.

The first and second correction lens units 114 and 115 are adjusted differently depending on whether the user is nearsighted or primitive. Since the refractive power is stronger as the focal length is short, the nearest lens uses a negative diopter using a concave lens, , But the near-invisible primitive can use a convex lens to change the refractive power of the lens so that it becomes a positive diopter.

That is, the user adjusts the positions of the first correcting lens unit 114, which is a convex lens and the second correcting lens unit 115, which is a concave lens, for example, The refractive power of the optical system 110 is varied by the curvature and thickness formed differently along the longitudinal direction of the two correction lens portions 114 and 115. [

The upper lens unit 116 is installed at an upper portion of the first lens unit 111 so that image light output from the display panel is incident on the first lens unit 111, The first and second correction lens units 114 and 115 are movably supported by the first and second correction lens units 114 and 115 and are formed so as to move in the horizontal direction.

The lower lens unit 117 is disposed below the second lens unit 112 and reflects light that has passed through the second lens unit 112 to be incident on the second lens unit 112, And a lower lens guide groove 117a is formed at an end of the first and second lens units 114 and 115 so as to support the first and second correction lens units 114 and 115 and to move in a horizontal direction.

The frame unit 120 is configured to support the optical system 110 and has an eyeglass shape so that it can be worn on the user's face.

The adjustment knob 130 is rotatably installed on one side of the frame 120 and is coupled to the first and second correction lens units 114 and 115 of the optical system 110 provided in the frame unit 120, The first knob 130a and the second knob 130b are rotated in the normal rotation direction or the reverse rotation direction when the adjustment knob 130 is rotated in the forward rotation direction or the reverse rotation direction, And the second correction lens units 114 and 115 move horizontally left and right so that the positions of the first and second correction lens units 114 and 115 are adjusted.

Accordingly, the wearer wears an optical device capable of correcting the visual acuity on the face, and then adjusts the refractive power of the optical system by the correction lens by adjusting the adjustment knob according to the user's visual acuity, .

(Second Embodiment)

FIG. 7 is a perspective view showing another embodiment of the optical device capable of correcting the visual acuity according to the present invention, and FIG. 8 is a block diagram showing the configuration of the optical device capable of correcting the visual acuity according to FIG.

First, repetitive descriptions of the same components as those of the optical device according to the first embodiment are omitted, and the same reference numerals are used for the same components.

As shown in FIGS. 7 and 8, the optical device 100a according to the second embodiment includes an optical system 110 for changing the optical path of an image output through a display panel (not shown) An optical system 110 which is movably provided in the optical system 110 so as to move the correction lens unit and automatically adjusts the dioptric power of the optical system 110 according to a user's visual acuity, An input unit 140, a control unit 150, an actuator unit 160, and a visual acuity detection unit 170.

That is, the optical apparatus 100a according to the second embodiment includes the structure of the first embodiment, the frame unit 120a, the input unit 140, the control unit 150, and the display unit 150 so that the power of the optical system 110 can be automatically controlled The actuator unit 160, and the visual acuity detecting unit 170, as shown in Fig.

The frame unit 120a is configured to support the optical system 110 and includes an optical system 110, an input unit 140, a control unit 150, (10), and a vision detection unit (170).

The input unit 140 is provided on one side of the frame unit 120a and detects an input signal for moving the first and second correction lens units 114 and 115 from a user. Lt; / RTI &gt;

When the input signal for detecting the position of the first and second correction lens units 114 and 115 is detected through the input unit 140, the controller 150 controls the actuator unit 160 to operate according to the detected input signal. And outputs a drive signal for driving.

The control unit 150 calculates drive information of a predetermined actuator according to the visual acuity of the user measured through the visual acuity detection unit 170 and outputs a drive signal corresponding to the calculated drive information to the actuator unit 160 do.

The actuator unit 160 is installed on one side of the frame unit 120a and includes a first lens unit 114 and a second lens unit 115 interlocked with the first and second correction lens units 114 and 115 of the optical system 110 provided in the frame unit 120a, The first and second actuators 160a and 160b may include a first actuator 160a and a second actuator 160b. The first and second actuators 160a and 160b operate in response to a driving signal from the controller 150, The first and second correction lens units 114 and 115 are moved in the horizontal direction to adjust the positions of the first and second correction lens units 114 and 115, respectively.

The visual acuity detecting unit 170 is installed in the frame unit 120a and detects visual acuity information of the user and outputs the visual acuity information to the control unit 150. When the user wears the optical device 100a, To detect the reflected light reflected by the light reaching the retina.

That is, the reflected light is reflected in parallel when it is in a regular time according to the refraction state of the eye, when it is primitive, it is estimated and reflected, and in the case of nearsightedness, reflected light is converged to measure a user's sight information.

Accordingly, the user wears an optical device capable of correcting the visual acuity on his or her face, and then adjusts the refractive power of the optical system by the correction lens through the input unit according to the visual acuity of the user, or adjusts the refractive power of the optical system The user can comfortably use the glasses without wearing glasses even if the eyesight is poor.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that

In the course of the description of the embodiments of the present invention, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, , Which may vary depending on the intentions or customs of the user, the operator, and the interpretation of such terms should be based on the contents throughout this specification.

100, 100a: optical device 110: optical system
111: first lens unit 112: second lens unit
113: beam splitter 114: first correction lens unit
114a: first correction lens guide portion 115: second correction lens portion
115a: second correction lens guide part 116: upper lens part
116a: upper lens guide groove 117: lower lens part
117a: lower lens guide groove 120, 120a: frame part
130: Adjustment knob 130a: First adjustment knob
130b: second adjustment knob 140: input part
150: control unit 160: actuator unit
160a: first actuator 160b: second actuator
170:

Claims (9)

And an optical system 110 for changing the optical path of the image output through the display panel to be displayed to the user, wherein the correction lens unit is movably installed in the optical system 110, And the dioptric power of the optical system 110 is adjusted according to the power of the optical system 110,
The optical system 110 includes a pair of first and second lens units 111 and 112 for changing the optical path of the image output from the display panel and displaying the changed optical path to the user.
A part of the image light output from the first lens unit 111, which is provided between the first and second lens units 111 and 112, is transmitted through the second lens unit 112, and the remaining image light is transmitted through the transmitted image A beam splitter 113 for reflecting and outputting light in a direction perpendicular to the light;
A first correction lens unit 114 provided on the first lens unit 111 side;
A second correction lens unit 115 provided on the second lens unit 112 side;
An upper lens unit 116 installed on the first lens unit 111 and movably supporting the first and second correction lens units 114 and 115; And
Further comprising a lower lens unit (117) provided below the second lens unit (112) and movably supporting the first and second correction lens units (114, 115) Possible optical devices. The method according to claim 1,
Wherein the optical device is a head mount display. delete The method according to claim 1,
Wherein the first correction lens unit (114) is made of a convex lens or a concave lens. The method according to claim 1,
Wherein the second correction lens unit (115) is made of a convex lens or a concave lens. The method according to claim 4 or 5,
Wherein the first and second correction lens units (114, 115) are cylindrical or toric lenses whose curvature decreases from one side to the other. The method according to claim 1,
The optical device includes a frame part 120 for supporting the optical system 110; And
A control knob for interlocking with the first and second correction lens units 114 and 115 and adjusting the positions of the first and second correction lens units 114 and 115 is provided on one side of the frame unit 120 130). &Lt; / RTI &gt; The method according to claim 1,
The optical device includes a frame portion 120a for supporting the optical system 110;
An input unit 140 installed at one side of the frame unit 120a and detecting a position movement signal of the first and second correction lens units 114 and 115 from a user;
A controller 150 for outputting a driving signal to the actuator 160 according to the detected movement signal; And
An actuator unit 160 interlocked with the first and second correction lens units 114 and 115 and operated to adjust the positions of the first and second correction lens units 114 and 115 according to the driving signal, And an optical system for correcting the visual acuity. 9. The method of claim 8,
The optical device according to claim 1, further comprising a visual acuity detection unit (170) installed in the frame unit (120a) for detecting visual acuity information of a user and outputting the visual acuity information to the control unit (150).

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