KR20170031978A - Head mount display - Google Patents

Head mount display Download PDF

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Publication number
KR20170031978A
KR20170031978A KR1020150129621A KR20150129621A KR20170031978A KR 20170031978 A KR20170031978 A KR 20170031978A KR 1020150129621 A KR1020150129621 A KR 1020150129621A KR 20150129621 A KR20150129621 A KR 20150129621A KR 20170031978 A KR20170031978 A KR 20170031978A
Authority
KR
South Korea
Prior art keywords
display panel
link
actuator
housing
pivot
Prior art date
Application number
KR1020150129621A
Other languages
Korean (ko)
Inventor
윤승현
김민환
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020150129621A priority Critical patent/KR20170031978A/en
Publication of KR20170031978A publication Critical patent/KR20170031978A/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors

Abstract

housing; A display panel mounted on the housing and providing a left eye image and a right eye image; A lens unit including a pair of lenses positioned on a front surface of the display panel; And a focus adjusting unit positioned on a rear surface of the display panel and adjusting a distance between the guide unit and the lens unit, wherein the focus adjusting unit comprises: a guide rail extending in a first direction in a back direction of the display panel; An actuator spaced apart from a rear surface of the display panel and fixed to the housing and having a length varying in the first direction; A link whose one end is connected to the actuator and the other end is inserted into the guide rail; And a pivot for fixing a position in a first direction of one point of the link, wherein the link rotates about the pivot when the length of the actuator changes and the other end of the link moves along the guide rail The feature of the head mount display includes a simple structure of the focus adjuster to reduce the size of the head mount display.

Description

Head Mount Display {HEAD MOUNT DISPLAY}

The present invention relates to a head mount display capable of focusing on a simple structure.

A head-mounted type display device has appeared, in which a variety of display forms come into view while attaching to the head to view an image. Such a device is called a head-mounted display (HMD), and the head-mounted display is positioned adjacent to the eye, so focus adjustment is required.

In particular, in recent years, a virtual reality head mount display has been introduced to provide a 3D stereoscopic image, not a 2D image, and a variety of images can be provided by turning a head 360 ° panoramic image as well as a vertical panoramic image according to a user's movement.

The virtual reality head-mounted display is able to provide 3D stereoscopic images by completely blocking ambient light and providing different images to the left and right eyes. In order for a user to recognize two images (a left-eye image and a right-eye image) as one stereoscopic image, the focal distance must be set to a proper value.

When a device such as a motor is provided on the head mount display to adjust an accurate focal distance, the fitting feeling is reduced, and therefore, a focal length adjusting device with a simple structure is needed.

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a head mount display having a simple structure focus adjusting portion.

housing; A display panel mounted on the housing and providing a left eye image and a right eye image; A lens unit including a pair of lenses positioned on a front surface of the display panel; And a focus adjusting unit disposed on a rear surface of the display panel and adjusting a distance between the guide unit and the lens unit, wherein the focus adjusting unit comprises: a guide rail extending in a first direction in a back direction of the display panel; An actuator spaced apart from a rear surface of the display panel and fixed to the housing and having a length varying in the first direction; A link whose one end is connected to the actuator and the other end is inserted into the guide rail; And a pivot for fixing a position in a first direction of one point of the link, wherein the link rotates about the pivot when the length of the actuator changes and the other end of the link moves along the guide rail A head-mounted display is provided.

The pair of actuators are arranged such that the length-changing portions face each other. A pair of links each coupled to a pair of actuators can be arranged in an X-shaped manner crossing the pivot.

The actuator may include a piezo actuator whose length changes when power is applied.

Wherein the actuator comprises: a stationary cover fixed to the housing and engaging with one side of the piezo actuator; And a movable cover coupled to the other end of the flexible actuator and coupled with one end of the link.

And a guide pawl extending through the display panel in a second direction perpendicular to a surface of the display panel and restricting movement of the display panel in a first direction.

The focus adjusting unit may further include a plurality of synchronizing links arranged to be spaced apart from each other in a third direction perpendicular to the first direction and guiding the links of the plurality of focus adjusting units to move simultaneously.

The link may further include a hinge that is located at the actuator and the connecting portion to change an angle between the link and the actuator, or a hinge that is positioned between one end of the link and the pivot to change an angle of the link.

According to at least one embodiment of the present invention, the size of the head mount display can be reduced by providing a simple structure focus adjuster.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

1 is a perspective view of a head-mounted display of the present invention.
2 is a perspective view showing a focusing part of the head mount display of the present invention.
3 is a view for explaining the operation of the focus adjusting unit of the head mount display of the present invention.
4 to 6 are views showing another embodiment of the focus adjusting portion of the head mount display of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In order to solve the disadvantages of the conventional fixed image device, a head mount display 100 mounted on a head of a user is emerging as a virtual reality realizing device. The head mount display 100 provides visual information such as being located in an actual virtual reality with a small device, so that realistic game play or virtual simulation can be reproduced more vividly.

The head mount display 100 includes a housing 150 forming an outer appearance, a display panel 110 mounted on the housing 150 and providing a left eye image and a right eye image, A lens unit 120 including a pair of lenses and a focus adjusting unit 130 located on the back surface of the display panel 110 and adjusting a distance between the lens unit 120 and the display unit 110.

The housing 150 forms an outer appearance of the head mount display 100, and one side of the housing 150 is in contact with the user's eyes, and the lens 120 is positioned in a portion of the user's eyes. The lens unit 120 may be divided into a left eye lens and a right eye lens to selectively provide a right eye image and a left eye image from the image provided by the display panel 110 to the user.

The display panel 110 is spaced apart from the lens unit 120 and the focus is adjusted according to the distance between the display panel 110 and the lens unit 120. The focus adjusting unit 130 adjusts the position of the display panel 110 to adjust the distance between the display panel 110 and the lens unit 120. Since the position of the display panel 110 is changed, the size of the head mount display 100 is increased by using a driving device such as a motor. Therefore, the focus adjusting unit 130 of the present invention uses an actuator 131 having a varying length .

2 is a perspective view illustrating a focus adjusting unit 130 of the head mount display 100 of the present invention. The focus adjusting unit 130 includes a guide rail 137, an actuator 131, a link 134, And a pivot 135. The focus adjusting unit 130 may include only one focus adjusting unit 130, but the pair of focus adjusting units 130 may be configured to face each other as shown in FIG.

The actuator 131 is fixed to the housing 150 and changes its length in the first direction. The first direction is parallel to the plane of the display panel 110. In the drawing, the horizontal direction refers to the first direction, but may be arranged obliquely to the display panel 110, such as a vertical direction or a diagonal direction.

There is a problem in that the size of the head mount display 100 increases when the length changing device is disposed in a direction perpendicular to the display panel 110 and the display panel 110 is disposed in a direction away from the lens portion 120. [ In order to solve the above problem, the focus adjusting part 130 of the present invention extends in the first direction.

The actuator 131 whose length changes in the first direction can use the actuator 131. The length of the piezo actuator 131 can be changed by adjusting the magnitude of the voltage applied to the piezo actuator 131. [ The piezo actuator 131 can be implemented in a very small size and noise is hardly generated, so that it is possible to reduce the feeling of resistance and reduce the size when applied to the head mount display 100 which is directly mounted on the face.

One side of the piezo actuator 131 is coupled to a fixed cover 132 fixed to the housing 150 and the other side is fixed to the housing 150 so that the position of the piezo actuator 131 is changed according to the length of the piezo actuator 131 And engages with the cover 133.

A link 134 may be used to convert a change in length of the actuator 131 in the first direction to a second direction to adjust the position of the display panel 110 in a second direction perpendicular to the first direction. One end of the link 134 is engaged with the moving cover 133 and the other end is inserted into a guide rail 137 extending in a first direction on the rear surface of the display panel 110.

The link 134 includes a pivot 135 and the position of the pivot 135 does not move in a first direction, i.e., a direction parallel to the display panel 110, Direction, or may be fixed to the housing 150. As shown in Fig.

The focus adjusting unit 130 includes a guide rail 137 extending in a first direction in a rear direction of the display panel 110 and spaced apart from a rear surface of the display panel 110 and fixed to the housing 150, An actuator 131 including a length changing portion whose length changes in a first direction, a link 134 connected to the actuator 131 at one end 134a and inserted at the other end 134b into the guide rail 137, And a pivot 135 that fixes a position in a first direction of a point of the link 134.

The link 134 is pivoted about the pivot 135. The other end of the link 134 is moved along the guide rail 137 in the direction opposite to the one end of the link 134 when the one end of the link 134 is displaced in the first direction by the actuator 131. [ Is moved.

2, the pivot 135 may be an intersection of the pair of links 134 when the pair of length adjusters are symmetrically disposed and the links 134 are arranged to intersect in an X- have.

3 (a) shows the state before the actuator 131 is changed in length, and FIG. 3 (b) shows a state in which the length of the actuator 131 is changed Respectively.

When the length of the actuator 131 changes, the link 134 rotates about the pivot 135 and the angle between the pair of links 134 becomes smaller, (110) in the second direction. That is, when the length of the actuator 131 'increases, the distance between the lens and the display panel 110 becomes closer to the distance between the lens unit 120 and the display panel 110 as the length of the actuator 131 decreases. .

If the position of the pivot 135 is disposed closer to one end of the link 134, the amount of change in the position of the display panel 110 relative to the change in the length of the actuator 131 can be increased. The angle of the link 134 is changed in accordance with the change in the position of the actuator 131 so that a hinge (not shown) is provided between the link 134 and the actuator 131 to change the angle between the link 134 and the actuator 131 And a hinge (not shown) may be further provided on the folded portion of the link 134. [

4 to 6 are views showing another embodiment of the focus adjusting unit 130 of the head mount display 100 of the present invention.

When the display panel 110 is coupled to only the other end of the link 134 of the focus adjusting unit 130, when the position of the display panel 110 changes according to the focus adjusting unit 130, , The display panel 110 may be moved in the first direction, or the display panel 110 may be inclined.

In order to solve the above problem, a guide pole 140 passing through the display panel 110 as shown in FIG. 4 of the present invention is further provided to allow the display panel 110 to move only in the second direction, It is possible to limit the movement of the display panel 110 in the planar direction.

The focus adjusting unit 130 of the present invention may be provided on the upper and lower portions of the display panel 110, respectively, as shown in FIG. It is possible to adjust the position more stably than the embodiment having only the focus adjustment part 130 at the center.

5, the upper and lower actuators 131 and 131 are moved in the same direction so that the upper and lower actuators 131 and 131 move without distortion, And a synchronization link 139 for connecting the mobile terminal 100 and the mobile terminal 100. [

As described above, according to at least one embodiment of the present invention, it is possible to reduce the size of the head mount display 100 by providing the focus adjustment unit 130 having a simple structure.

The foregoing detailed description should not be construed in all aspects as limiting and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: head mount display 110: display panel
120: lens unit 130: focus adjusting unit
131: actuator 132: fixed cover
133: moving cover 134: link
135: Pivot 137: Guide rail
139: Synchronization link
140: guide pole 150: housing

Claims (7)

housing;
A display panel mounted on the housing and providing a left eye image and a right eye image;
A lens unit including a pair of lenses positioned on a front surface of the display panel; And
And a focus adjusting unit positioned on a back surface of the display panel and adjusting a distance from the lens unit,
Wherein the focus adjusting unit comprises:
A guide rail extending in a first direction in a rear direction of the display panel;
An actuator spaced apart from a rear surface of the display panel and fixed to the housing and having a length varying in the first direction;
A link whose one end is connected to the actuator and the other end is inserted into the guide rail; And
And a pivot for fixing a position in a first direction of a point of the link,
Wherein when the length of the actuator changes, the link rotates about the pivot and the other end of the link moves along the guide rail. The method according to claim 1,
Wherein the actuators are disposed such that the length changing portions face each other,
Wherein a pair of links, each coupled to a pair of actuators, are arranged crossed in an X-shape around the pivot. The method according to claim 1,
Wherein the actuator comprises a piezo actuator whose length changes when power is applied. The method of claim 3,
Wherein the actuator comprises:
A fixed cover fixed to the housing and engaging with one side of the piezo actuator; And
Further comprising a movable cover coupled to the other side of the flexible actuator and engaging with one end of the link. The method according to claim 1,
Further comprising a guide pawl extending through the display panel in a second direction perpendicular to a surface of the display panel and restricting movement of the display panel in a first direction. The method according to claim 1,
Wherein the focus adjusting unit comprises:
And a plurality of second electrodes are arranged in a third direction perpendicular to the first direction,
Further comprising a synchronization link for connecting and linking the links of the plurality of focus adjusting units to move simultaneously. The method according to claim 1,
The link includes:
Further comprising a hinge positioned in the connection with the actuator to change an angle between the link and the actuator or to be positioned between one end of the link and the pivot to change the angle of the link.
KR1020150129621A 2015-09-14 2015-09-14 Head mount display KR20170031978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150129621A KR20170031978A (en) 2015-09-14 2015-09-14 Head mount display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150129621A KR20170031978A (en) 2015-09-14 2015-09-14 Head mount display

Publications (1)

Publication Number Publication Date
KR20170031978A true KR20170031978A (en) 2017-03-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018230790A1 (en) * 2017-06-13 2018-12-20 주식회사 비햅틱스 Head mounted display
WO2019071520A1 (en) * 2017-10-12 2019-04-18 深圳市柔宇科技有限公司 Display apparatus and electronic apparatus
WO2019112114A1 (en) * 2017-12-07 2019-06-13 엘지전자 주식회사 Glasses-type terminal and operation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018230790A1 (en) * 2017-06-13 2018-12-20 주식회사 비햅틱스 Head mounted display
US11131856B2 (en) 2017-06-13 2021-09-28 Bhaptics Inc. Head-mounted display
WO2019071520A1 (en) * 2017-10-12 2019-04-18 深圳市柔宇科技有限公司 Display apparatus and electronic apparatus
WO2019112114A1 (en) * 2017-12-07 2019-06-13 엘지전자 주식회사 Glasses-type terminal and operation method thereof

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