JP5255152B1 - Variable focus glasses - Google Patents

Abstract

[PROBLEMS] To provide versatile variable-focus eyeglasses that allows a user with different visual acuity and a user with different left and right visual acuity to clearly and individually visually recognize objects at different distances by a simple operation. provide.
Control for controlling driving units 23R and 23L and driving units 23R and 23L, which are provided for each of variable focus lenses 15R and 15L capable of changing a focal length, and change the focal length of the variable focus lenses 15R and 15L. Unit 25 and predetermined switches 51 and 57, and when a predetermined operation is performed on the switches 51 and 57, the drive amount of the drive unit 23 is designated by the operation of the switches 51 and 57. The control unit 25 individually controls the drive unit 23 so as to obtain a drive amount when the user of the variable focus spectacles can clearly see the object to be viewed at a predetermined distance stored for each of 15R and 15L. Variable focus glasses.
[Selection] Figure 1

Description

The present invention relates to variable focus glasses capable of adjusting a focal length, and in particular, users with different visual acuity and users with different left and right visual acuity clearly and visually recognize objects to be viewed at different distances. The present invention relates to a versatile variable-focus eyeglass that can be used.

  In general, the human eye's focus adjustment function decreases with age, and presbyopic symptoms appear. For this reason, in the prior art, it is necessary to wear near eyeglasses (glasses that look closer, such as reading glasses). In addition, when a person with myopia ages and presbyopia appears, near-sight glasses (glasses that look closer, such as presbyopia) and distance glasses (glasses that look far away, glasses for near-sightedness) I had to change glasses) alternately. Therefore, in order to solve these problems, spectacles for viewing the distance using a variable focus lens have been disclosed.

  For example, the amount of liquid flowing into the lens space is changed by enclosing liquid in a lens with a space formed therein, a lens space and a reservoir connected to this space, and rotating a dial provided in the reservoir. A variable focus spectacle that can be adjusted in frequency has been filed. (For example, Patent Document 1)

  However, the variable focus glasses have a problem that the dial has to be manually rotated each time according to the distance to the object to be viewed, which is troublesome.

  In addition, as spectacles for viewing the distance using a variable focus lens, spectacles for changing the focal point by changing the volume of the transparent liquid inside the lens body by operating a pump are disclosed. (For example, Patent Document 2)

  By the way, in this spectacles, when the pump is operated, the transparent liquid flows into the lens body from the inlet, while the transparent liquid in the lens body is discharged from the outlet. And the transparent liquid discharged | emitted from the discharge port is again inject | poured into a lens body from an injection port through a tube and a pump. In other words, the transparent liquid only circulates, and the focal length of the lens body cannot be adjusted in the first place.

  In the glasses, one tube connected to the discharge side of the pump is branched in the middle, and a transparent liquid is injected into each lens body. And the transparent liquid discharged | emitted from each lens body merges into one tube, and is connected to the suction side of a pump. That is, the glasses do not have a mechanism for adjusting the focal length for each of the left and right lens bodies, and cannot adjust the focal length for each of the left and right lens bodies. As a result, users with different frequencies on the left and right have a problem that they cannot clearly see the visual object.

  In addition, even if this spectacle is a spectacle that can adjust the focal length of the lens body, the method using a pump, a valve, and a flow meter is generally cumulative by repeatedly putting in and out of liquid for many years. There is a problem that a large flow rate error occurs, and a focal length of the variable focus lens cannot be reproduced repeatedly and accurately.

  The glasses are also provided with a valve. The specific configuration of the valve is not shown, but considering that the controller drives and controls the valve, some mechanical device (for example, a solenoid valve) and wiring for mechanically operating the valve using electricity are required. Become. In addition, since the glasses are provided up to the flow meter, the glasses become very large or heavy, and have a problem that they are not put to practical use.

  Further, as spectacles for viewing from a perspective by using a variable focus lens, electronic glasses that change the focus by applying a voltage to the variable focus lens when a plurality of switches provided on the frame are simultaneously pressed are disclosed. (For example, Patent Document 3)

  However, this electronic spectacle simply has to switch between a far field and a near field, and has a problem that the object to be viewed cannot be clearly seen according to the visual acuity of the user. Moreover, since a focal distance cannot be changed for every user, when a user changes, it has the subject that a visual recognition target object cannot be seen clearly. Furthermore, since the focal length cannot be adjusted for each of the left and right lens bodies, there is a problem that users with different left and right eyesight cannot clearly see the object to be viewed. That is, the electronic glasses are not versatile for users with different visual acuity and users with different left and right visual acuity.

  As a spectacle that uses a variable focus lens, a liquid crystal lens is attached to a fixed lens that looks far, and when the focus switch is pressed to switch the plunger to the ON contact side, a voltage is applied to the liquid crystal lens. When switching to the near field of view and switching the plunger to the OFF contact side, the voltage applied to the liquid crystal lens is stopped, and electronic glasses that can see the far field of view by the power of the solid lens are disclosed. (For example, Patent Document 4)

  However, since this electronic spectacle has to use a solid lens unique to the user for use at a distance, there is a problem that the visual target object is not always clearly seen when the user changes. . Moreover, even when this electronic spectacle is used exclusively for the user, if the power of the user progresses, it is necessary to recreate the solid lens part, and in turn pull down the liquid crystal lens as well. Have. In other words, the electronic glasses are not only versatile for users with different visual acuity and users with different left and right visual acuity, but also when used exclusively for the user (for example, the user's visual acuity is low). Has the problem of being limited.

  In addition, as a spectacle that uses a variable focus lens to see the perspective, by applying a voltage between the electroactive polymer member in the bellows and the counter electrode to deform the bellows, the membrane of the variable focus lens section is fluid and transparent A variable focus lens device is disclosed that changes the focal length by allowing a filling liquid to be taken in and out. (For example, Patent Document 5)

  However, this varifocal lens device simply drives the hydraulic pump, allows the fluid transparent filling liquid to enter and exit, curves the membrane, and switches the focal point. There is a problem that the focal lengths of the left and right variable focus lenses must be matched to each other. In addition, since the bellows is deformed by applying a voltage between the electroactive polymer member in the bellows and the counter electrode, a cumulative flow rate error occurs when the liquid is repeatedly put in and out for many years. The focal length cannot be reproduced repeatedly and accurately.

In each of Patent Documents 1 to 5, a user with different visual acuity and a user with different left and right visual acuity can clearly visually recognize objects to be viewed at different distances by a simple operation. It has a problem that it cannot be done.

Special table 2011-516925 gazette Japanese Patent Laid-Open No. 5-303011 JP 2009-80242 A JP 2009-98649 A JP 2009-251420 A

  As described above, the above-mentioned spectacles of Patent Document 2, the electronic spectacles of Patent Document 3, and the electronic spectacles of Patent Document 4 are originally not capable of adjusting the focal length of the lens body, or used with different visual acuity. There are problems such as lack of versatility for users and users with different left and right eyesight. On the other hand, the spectacles of Patent Document 1 and the variable focus lens device of Patent Document 5 have a certain versatility, but in Patent Document 1, the dial must be manually rotated each time, which is troublesome, Patent Document No. 5 has a problem that the focal lengths of the left and right variable focus lenses must be adjusted for each side.

In other words, in the prior art, a versatile variable that allows a user with different visual acuity and a user with different left and right visual acuity to clearly and visually recognize objects to be viewed at different distances by a simple operation. The focus glasses could not be provided. In view of the above points, the present invention is a versatile device that allows users with different visual acuity and users with different left and right visual acuity to clearly and visually recognize objects at different distances by simple operations. An object is to provide certain variable focus glasses.

  In order to solve the above-mentioned problems, the inventor invented the variable focus glasses. However, the variable focus glasses that are comfortable for the user, the variable focus glasses that are easy to operate, and the highly convenient variable focus glasses are provided. It is desirable to be. In view of the above, the present invention has a secondary object of providing variable focus glasses that are comfortable to wear for users, variable focus glasses that are easy to operate, or variable focus glasses that are highly convenient.

In order to achieve the above object, the present invention provides a variable-focus eyeglass comprising a pair of left and right variable-focus lenses capable of changing a focal length.
A drive unit that is provided for each variable focus lens and changes the focal length of the variable focus lens;
A switch for performing an operation of driving the driving unit ;
A control unit that controls the drive unit in response to an operation of the switch ;
With
The user of the variable focus glasses has a function of storing a predetermined drive amount of the drive unit in advance for each drive unit when the user can clearly see a visual object at a predetermined distance.
When the user performs a predetermined operation for reproducing the predetermined driving amount stored in advance on the switch , the control unit controls the driving unit so as to reproduce the predetermined driving amount stored in advance. It is characterized by being controlled individually.

According to a second aspect of the present invention, in the first aspect, when the user performs a predetermined operation for reproducing the predetermined driving amount stored in advance, the driving amount of the driving unit is designated by the operation of the switch. In addition, the control unit individually controls the drive unit so that a predetermined drive amount stored in advance is obtained for each drive unit.

In the invention described in claim 3, it in claim 1 or claim 2, predetermined driving amount when the clearly visible the viewed object at a predetermined distance, a driving amount taught by the user It is characterized by.

According to this, when a predetermined operation is performed on the switch, a driving amount is obtained when the user of the variable focus spectacles can clearly see a visual target object at a predetermined distance. This driving amount is the driving amount when the user can visually recognize the visual target object individually, so that the user with different visual acuity and the user with different left and right visual acuity can be visually recognized by simple operation. Objects can be clearly seen. Therefore, as in the conventional example, users with different visual acuity, use with different left and right visual acuity without manually rotating the dial one by one or without adjusting the focal length of the left and right variable focus lenses one by one The person himself / herself can visually recognize the visual recognition object clearly by a simple operation. As a result, versatile variable-focus glasses that allow users with different visual acuity and users with different left-right visual acuity to clearly and visually recognize objects at different distances by simple operations. Can be provided.

  Since the driving amount does not change unless the switch is operated, the driving amount does not change even when another visual object crosses while the user visually recognizes the individual visual object. For this reason, a visual recognition target object can be visually recognized stably.

The invention according to claim 4 is the variable focus lens according to any one of claims 1 to 3, wherein the variable focus lens is a variable focus lens capable of changing a focal length by taking in and out of a liquid,
The drive unit is a drive unit that changes the focal length of the variable focus lens by taking in and out the liquid.

  According to this, since the variable-focus lens is a variable-focus lens that can change the focal length by taking in and out of the liquid, a problem such as liquid crystal-type variable-focus glasses, that is, a dielectric material is used. In general, the problem of lowering the light transmittance of the lens, the lower the light transmittance of the lens, the lower the brightness, the user's pupil diameter becomes larger, the depth of focus becomes shallower, and the focus is adjusted. The problem that it is difficult, the problem of placing a burden on the user, the problem that it is difficult to increase the diameter and the field of view is limited can be solved.

As in the invention described in claim 5, in claim 4, the drive unit includes a drive source and a movable unit that is movable when the drive source is driven,
  The amount of movement of the movable part may be the driving amount.

In the invention of claim 6 , in claim 4 , the variable focus lens is formed with an internal space into and out of the liquid,
The drive is;
A piston that is provided in an inner diameter part connected to the internal space and moves to change the focal length of the variable focus lens by moving liquid in and out;
One of the stepping motor, servo motor, and DC motor that can be controlled to the drive amount when the visual target at a predetermined distance can be clearly seen;
With
The control unit moves the piston individually by driving the motor.

According to this, the visual target object, such that the focal length when the user clearly visible, the control unit is a stepping motor, servo motor, when viewed object at a predetermined distance clearly visible A piston can be moved by controlling a DC motor that operates to achieve a driving amount, and the amount of liquid flowing into and out of the internal space can be controlled. Each of the motors described above can be accurately positioned and has position reproducibility. Therefore, the piston that is moved by each motor is also accurately positioned and the position is accurately reproduced. Therefore, the focal length of the variable focus lens can be reproduced repeatedly and accurately.

In addition, since the amount of liquid taken in and out can be controlled for each variable focus lens, the focal length can be changed for each variable focus lens. For this reason, even if the right and left visual powers are different, the focal length can be finely controlled for each of the right eye and the left eye. As a result, it is possible to provide variable focus glasses that allow the user to clearly see the object to be viewed.

  Further, since the focal length of the variable focus lens can be reproduced repeatedly and accurately, a valve and a flow meter as in Patent Document 2 are not required. Moreover, the liquid pressure flow transmission device cell which stores an operation | movement liquid and fluid transparent liquid filling liquid like patent document 5 is not required. For this reason, the variable focus glasses can be made compact. As a result, it is possible to provide variable focus glasses that are comfortable for the user.

According to a seventh aspect of the present invention, in any one of the first to third aspects, the variable focus lens is a variable focus lens capable of changing a focal length by increasing or decreasing an applied voltage,
The drive unit is a drive unit that changes the focal length of the variable focus lens by increasing or decreasing the applied voltage.

  According to this, the apparatus can be reduced in size and weight. As a result, it is possible to provide variable focus glasses that are comfortable for the user. Further, unlike liquid variable focus glasses, it is not necessary to consider liquid leakage.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the varifocal glasses include a switch for performing an operation of gradually changing the focal length of the varifocal lens,
When the focal length of the variable focus lens is gradually changed from a predetermined driving amount stored in advance, it has a function of calculating the driving amount for the driving unit so that a visual target at a predetermined distance can be clearly seen. And
When the switch is operated to gradually change the focal length of the variable focus lens, the control unit controls the drive unit so that the drive amount of the drive unit becomes the calculated drive amount.

According to this, by a simple operation, a user with different visual acuity and a user with different left and right visual acuity can clearly visually recognize an object to be viewed at an arbitrary distance. As a result, it is versatile that a user with different visual acuity and a user with different left and right visual acuity can clearly and visually recognize a visual target object at an arbitrary distance by a simple operation. Variable focus glasses can be provided.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, the drive unit, the operation unit that operates the drive unit, the control unit, the drive unit, and the power supply unit that supplies power to the control unit Among them, at least the operation unit is provided in a remote controller provided separately from the spectacle frame that holds the variable focus lens.

  According to this, since at least the operation unit is provided in the remote controller among the drive unit, the operation unit, the control unit, and the power supply unit, the weight on the spectacle frame side can be reduced. As a result, it is possible to provide variable focus glasses that are comfortable to wear. In addition, since the drive unit can be operated by the operation unit provided in the remote controller, it is possible to provide variable focus glasses with good operability and high convenience.

As in the invention described in claim 10 , the variable focus glasses according to any one of claims 1 to 9 are distance measuring means for measuring the distance to the visual object and visual recognition for detecting the presence or absence of the visual object. Any one of the object detection means may be provided.

It is a top view of the variable focus spectacles by 1st Embodiment, and is AA sectional drawing of FIG. It is a front view of the variable focus spectacles by 1st Embodiment. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is an enlarged view of the left variable focus lens and drive unit according to the first embodiment. 1 is a block diagram of variable focus glasses according to a first embodiment. FIG. It is a top view of the variable focus spectacles by 2nd Embodiment. It is a front view of the variable focus spectacles by 2nd Embodiment. It is the side view seen from the A direction of FIG. It is the side view seen from the B direction of FIG. It is a block diagram of the variable focus spectacles by 2nd Embodiment. It is a drive amount-distance correlation diagram of the variable focus glasses according to the fifth embodiment. It is a drive amount-distance correlation diagram of variable focus glasses according to the sixth embodiment. It is an enlarged view of the variable focus lens and the drive part of the left side of the variable focus spectacles by 7th Embodiment. It is FF sectional drawing of FIG. It is GG sectional drawing of FIG. It is a front view of the variable focus spectacles by 8th Embodiment. It is a front view of the variable focus spectacles by 9th Embodiment. It is explanatory drawing of the drive part of the variable focus spectacles by 10th Embodiment. It is a top view of the variable focus spectacles by 11th Embodiment.

(First embodiment)
The first embodiment relates to liquid variable focus glasses among variable focus glasses. FIG. 1 is a plan view of the variable focus glasses 11 and is a cross-sectional view taken along the line AA of FIG. FIG. 2 is a front view of the variable focus glasses. 3 is a cross-sectional view taken along line BB in FIG. 4 is a cross-sectional view taken along the line CC of FIG. FIG. 5 is an enlarged view of the variable focus lens and the drive unit. As shown in FIG. 1, the varifocal glasses 11 constitute a front portion of the spectacle frame 13, and include a front 17 that holds a pair of left and right varifocal lenses 15, and a temple 19 that continues to the front 17. In the first embodiment, the temple 19 is formed integrally with the front 17. However, like the generally used glasses, the temple 19 is separated from the front 17 and a predetermined connecting member or the like is provided. It is good also as a structure bent through.

  In the following description, a pair of left and right varifocal lenses 15 and temples 19 are used separately as necessary as necessary. That is, of the pair of left and right variable focus lenses 15, the right variable focus lens 15 is referred to as a variable focus lens 15R and the left variable focus lens 15 is referred to as a variable focus lens 15L with the user wearing variable focus glasses 11. Shall be referred to as Further, the right temple 19 is referred to as a temple 19R and the left temple 19 is referred to as a temple 19L with the user wearing the variable focus glasses 11. The drive unit 23 provided on the right temple 19R is referred to as a drive unit 23R, and the drive unit 23 provided on the left temple 19L is referred to as a drive unit 23L. The stepping motor 35 provided on the right temple 19R is referred to as a stepping motor 35R, and the stepping motor 35 provided on the left temple 19L is referred to as a stepping motor 35L.

  As will be described later, the stepping motor is a drive source of the drive unit and is not the drive unit itself, but when the stepping motor is driven, the drive unit is driven. Further, the control unit controlling the stepping motor also results in the control unit controlling the drive unit. For this reason, it describes as driving a stepping motor (drive part) suitably, a control part controlling a stepping motor (drive part), etc. suitably. The control unit is used in a broad concept including a storage unit to be described later, and is described as being stored in the storage unit (control unit), stored in the storage unit (control unit), or the like.

  As shown in FIG. 5, the variable focus lens 15 is a flexible lens disposed between a front lens 15a that forms the front surface side, a rear lens 15b that forms the rear surface side, the front lens 15a, and the rear lens 15b. A film 15c is provided. A space 15d is formed between the front lens 15a and the flexible film 15c, and a space 15e is formed between the flexible film 15c and the rear lens 15b. The rear lens 15b described above is formed with a hole 15f that communicates the space 15e and the communication path 13a. The communication path 13a communicates the hole 15f and a storage chamber 37 described later. The space 15e, the hole 15f, the communication passage 13a, and the storage chamber 37 are filled with a transparent liquid 21 (for example, silicon oil having high transparency).

  Further, in the right temple 19R, the transparent liquid 21 is taken in and out of the right variable focus lens 15R, and the thickness of the right variable focus lens 15R is changed to change the focal length, and the drive unit 23R. , 23L, and a power supply unit 27 for supplying power to the control unit 25. Further, in the left temple 19L, a transparent liquid 21 is taken in and out of the left variable focus lens 15L, and the focal length is changed by changing the thickness of the left variable focus lens 15L, and the drive unit 23R. , 23L for controlling 23L. The electric power supplied from the power supply unit 27 is transmitted to the drive unit 23 and the control unit 25 via the wiring 29 (illustrated in FIG. 2). The wiring 29 described above may be a wiring pattern formed on a film by etching, copper foil pasting, or the like. By forming the wiring pattern on the film, the spectacle frame 13 can be reduced in size.

  Next, the drive unit 23 will be described. In the description, the drive unit 23L provided in the left temple 19L will be described. The drive unit 23R provided on the right temple 19R is configured in the same manner as the drive unit 23L provided on the left temple 19L.

  As shown in FIG. 5, an inner diameter portion 19a is formed in the left temple 19L, and a piston 31, a feed screw shaft 33, and a left stepping motor 35L are incorporated in the inner diameter portion 19a. Of the inner diameter portion 19a, at least a portion where the piston 31 slides is formed in a cylindrical shape, and a storage chamber 37 for storing the transparent liquid 21 is formed by the piston 31 and the inner diameter portion 19a. The piston 31 is formed with a female screw, and a feed screw shaft 33 is screwed into the piston 31.

  The shaft 35a of the left stepping motor 35L is press-fitted into the inner diameter portion 33a of the feed screw shaft 33. When the shaft 35a rotates, the feed screw shaft 33 rotates integrally. When the shaft 35a of the left stepping motor 35L rotates counterclockwise when viewed from the opposite side of the shaft 35a in the direction of the shaft 35a, the piston 31 moves in the D direction. At this time, the transparent liquid 21 stored in the storage chamber 37 moves to the space 15e side through the communication path 13a and the hole 15f. When the transparent liquid 21 flows into the space 15e, the left variable focus lens 15L swells in the thickness direction, and the refractive index can be increased (focal length can be shortened).

  Further, when the shaft 35a of the left stepping motor 35L rotates clockwise from the opposite side of the shaft 35a as viewed in the direction of the shaft 35a, the piston 31 moves in the E direction shown in FIG. At this time, the transparent liquid 21 stored in the space 15e moves to the storage chamber 37 side via the hole 15f and the communication path 13a. When the transparent liquid 21 moves to the storage chamber 37 side, the left variable focus lens 15L is contracted in the thickness direction, and the refractive index can be lowered (the focal length can be increased). The piston 31 is provided with a detent 31a so that the piston 31 does not rotate when the feed screw shaft 33 rotates.

  By the way, when a predetermined amount of pulse signal is given from the control unit 25 to the right stepping motor 35R and the left stepping motor 35L, the shaft 35a rotates by an angle corresponding to the amount (number of pulses) of the pulse signal. The number of pulses described above is a drive amount when driving the drive units 23R and 23L. Since the number of pulses described above can be converted into the rotation amount of the shaft 35a, the rotation amount of the shaft 35a may be treated as the drive amount of the present invention. Moreover, you may handle the moving amount | distance of a movable part (for example, piston 31) as a drive amount of this invention. You may detect the moving amount | distance of the movable part (for example, piston 31) mentioned above using a linear scale, a sensor, etc. The movable portion is a portion that is movable when a drive source (stepping motor 35 in the first embodiment) is driven, and corresponds to the piston 31 and the feed screw shaft in the first embodiment.

  Note that a rotary encoder may be provided in the above-described right stepping motor 35R and left stepping motor 35L. The rotary encoder functions as drive amount detection means. As shown in FIG. 1, when the rotary encoder 39 is provided in the stepping motors 35R and 35L, the number of pulses and the rotation amount of the shaft 35a converted from the number of pulses can be detected very accurately. Further, the drive unit 23 can be controlled by feeding back the number of pulses to the control unit 25.

  Next, the control unit 25 will be described. The control unit 25 stores a control program for controlling the stepping motors 35R and 35L. This control program teaches in advance that the drive amount of the drive unit 23 is designated by the operation of the touch sensor 51 and the touch sensor 57 when a predetermined operation is performed on the touch sensor 51 and the touch sensor 57 described later. It has a function of controlling the drive unit 23 so that the driven amount is achieved.

  Next, the operation unit 47 will be described. An operation unit 47 is provided on the right temple 19R and the left temple 19L. As shown in FIG. 4, the right temple 19 of the operation unit 47 is provided with a power switch 49 for turning the power on and off, a touch sensor 51, and a teaching button 53. Further, as shown in FIG. 3, the left temple 19 </ b> L of the operation unit 47 is provided with a mode switching button 55, a touch sensor 57, and a registration button 59.

  When the touch sensor 51 or the touch sensor 57 is touched, a predetermined detection signal is input to the control unit 25. The touch sensor 51 and the touch sensor 57 constitute an example of the switch of the present invention. In addition to the touch sensor described above, the switch may be another switch such as a push button switch or a proximity switch.

  The mode switching button 55 switches modes. When the mode switching button 55 described above is pressed, the viewpoint switching mode, constant mode, arbitrary mode, and teaching mode can be switched.

The viewpoint switching mode is a mode in which the focal length is individually switched for a plurality of visual objects at different distances, and the control unit 25 allows the stepping motor 35R to clearly see the visual object. (Driver 23R) and stepping motor 35L (Driver 23L) are controlled to change the focal lengths of the right variable focus lens 15R and the left variable focus lens 15L. The constant mode is a mode in which the focal length is made constant when inconvenience occurs when the focal length changes, such as when driving an automobile. The arbitrary mode is a mode in which the focal length is changed by manual control so that the user can clearly see the visual object each time the visual object is in an arbitrary position.

By the way, since a user's visual acuity differs individually, according to a user, you must make it the visual recognition object in a predetermined distance clearly visible . In order to adjust the focal length so that the visually recognized object can be clearly seen, the user gives instructions in advance. To perform teaching, the mode switching button 55 is pressed to enter teaching mode.

  When the user touches the touch sensor 51 with a finger during the teaching mode, a predetermined detection signal is input to the control unit 25. Then, when the user removes his / her finger from the touch sensor 51, the detection signal input described above is stopped. The control unit 25 controls the right stepping motor 35R so that the shaft 35a of the right stepping motor 35R repeats forward rotation and reverse rotation every time a detection signal is input. While the touch sensor 51 is being touched, normal rotation or reverse rotation of the shaft 35a is maintained, and when the finger is released, it stops.

  Similarly, when the user touches the touch sensor 57 with a finger during the teaching mode, a predetermined detection signal is input to the control unit 25. Then, when the user removes his / her finger from the touch sensor 57, the input of the detection signal described above is stopped. The control unit 25 controls the left stepping motor 35L so that the shaft 35a of the left stepping motor 35L repeats forward rotation and reverse rotation every time a detection signal is input. While the touch sensor 57 is being touched, normal rotation or reverse rotation of the shaft 35a is maintained, and when the finger is released, the shaft 35a stops.

  Teaching includes two-point teaching that teaches two points of perspective, three-point teaching that teaches three points, multi-point teaching that teaches multiple points, and the like.

  The two-point teaching will be described. First, a teaching procedure in the right variable focus lens 15R will be described. In FIG. 1, the user covers the left variable focus lens 15 </ b> L with his hand and visually recognizes the visual object OB <b> 1 at a first distance (for example, the distance L <b> 1 = 30 cm from the eyeglass frame 13 to the visual object OB <b> 1). . Next, the user touches the touch sensor 51 described above with his / her finger or releases his / her finger to drive the right stepping motor 35 </ b> R so that the object OB <b> 1 can be visually recognized most clearly. The focal length of the lens 15R is changed. Then, the teaching button 53 is pressed. At this time, the number of pulses N1 from the origin for the right stepping motor 35R is stored in the storage unit 63 (control unit 25) (see FIG. 6 for the storage unit 63). If the right stepping motor 35R is provided with a rotary encoder, the number of pulses from the origin position detected by the rotary encoder is stored in the storage unit 63 (control unit 25).

  Next, the user covers the left variable focus lens 15L with his / her hand, and visually recognizes the visual recognition object OB2 at the second distance (for example, the distance L2 = 100 cm from the spectacle frame 13 to the visual recognition object OB2). Next, the user touches the touch sensor 51 with the finger or releases the finger to drive the right stepping motor 35R so that the visual object OB2 can be visually recognized most clearly. The focal length of the lens 15R is changed. Then, the teaching button 53 is pressed. At this time, the number of pulses N2 from the origin for the right stepping motor 35R is stored in the storage unit 63 (control unit 25). If the right stepping motor 35R is provided with a rotary encoder, the number of pulses from the origin position detected by the rotary encoder is stored in the storage unit 63 (control unit 25).

  A teaching procedure in the left variable focus lens 15L will be described. In FIG. 1, the user covers the right variable focus lens 15 </ b> R with his / her hand and visually recognizes the above-described visual object OB <b> 1. Next, the user touches the touch sensor 57 with the finger or releases the finger to drive the left stepping motor 35L so that the visual target OB1 can be visually recognized most clearly. The focal length of the lens 15L is changed. Then, the teaching button 53 is pressed. At this time, the number of pulses N3 from the origin for the left stepping motor 35L is stored in the storage unit 63 (control unit 25). If the left stepping motor 35L is provided with a rotary encoder, the number of pulses from the origin position detected by the rotary encoder is stored in the storage unit 63 (control unit 25).

  Next, the user covers the right varifocal lens 15R with his / her hand and visually recognizes the above-described visual object OB2. Next, the user touches the touch sensor 57 with the finger or releases the finger to drive the left stepping motor 35L so that the visual target OB2 can be visually recognized most clearly. The focal length of the lens 15L is changed. Then, the teaching button 53 is pressed. At this time, the pulse number N4 from the origin for the left stepping motor 35L is stored in the storage unit 63 (control unit 25). If the left stepping motor 35L is provided with a rotary encoder, the number of pulses from the origin position detected by the rotary encoder is stored in the storage unit 63 (control unit 25).

  The touch sensor 51, the touch sensor 57, the teaching button 53, and the storage unit 63 (control unit 25) described above constitute an example of a teaching unit. When the rotary encoder 39 is provided in the stepping motor 35, the touch sensor 51, the touch sensor 57, the teaching button 53, the storage unit 63 (control unit 25), and the rotary encoder constitute an example of the teaching unit of the present invention. To do. Instead of the pulse number N1, the pulse number N2, the pulse number N3, and the pulse number N4, the rotation amount Rev1 converted from the pulse number N1, the rotation amount Rev2 converted from the pulse number N2, and the rotation converted from the pulse number N3 The rotation amount Rev4 converted from the amount Rev3 and the number of pulses N4 may be stored.

  When the teaching is completed, the operation of the touch sensor and the number of pulses are related by the program stored in the control unit 25. For example, when operation A is performed on the touch sensor, the number of pulses for the right stepping motor 35R is N1, the number of pulses for the left stepping motor 35L is N3, and operation B is performed on the touch sensor. The number of pulses for the stepping motor 35R on the right side is N2, and the number of pulses for the left stepping motor 35L is N4, so that the number of pulses for the stepping motors 35R and 35L is associated with a predetermined operation. That is, by operating the touch sensor 51 and the touch sensor 57, the pulse number N1 and the pulse number N2 for the right stepping motor 35R, and the pulse number N3 and the pulse number N4 for the left stepping motor 35L can be specified. The touch sensor 51 and the touch sensor 57 have a function of specifying the number of pulses. Instead of the pulse number N1, the pulse number N2, the pulse number N3, and the pulse number N4, the rotation amount Rev1 converted from the pulse number N1, the rotation amount Rev2 converted from the pulse number N2, and the pulse number N3 are converted. Each rotation amount of the rotation amount Rev4 converted from the rotation amount Rev3 and the number of pulses N4 may be associated with the operation of the switch.

After performing the two-point teaching, when the variable focus glasses 11 are used in the viewpoint switching mode, the mode switching button 55 is pressed to enter the viewpoint switching mode. When the mode switching button 55 is pressed to enter the viewpoint switching mode, the number of pulses of the stepping motor 35 is alternately changed to the number of pulses of the items (1) and (2) described later each time the touch sensor 51 or the touch sensor 57 is touched. Thus, the control unit 25 individually controls the right stepping motor 35R (drive unit 23R) and the left stepping motor 35L. That is, the varifocal glasses 11 according to the first embodiment reproduces the driving amount taught in advance for each of the right varifocal lens 15R and the left varifocal lens 15L, so that two visual objects can be viewed. It is possible to focus on OB1 and OB2 alternately. As a result, each time the user touches the touch sensor 51 or the touch sensor 57, the user can visually clearly and visually recognize the two visual objects OB1 and OB2 at two points.

(1) Right side: Number of pulses N1, Left side: Number of pulses N3
(2) Right side: Number of pulses N2, Left side: Number of pulses N4

  There are various methods for associating the touch sensor with the number of pulses. For example, every time one of the touch sensors 51 and 57 is touched, the number of pulses of the stepping motors 35R and 35L is alternately changed to the number of pulses of the items (1) and (2) described above. The control unit 25 may control the right stepping motor 35R (drive unit 23R) and the left stepping motor 35L (drive unit 23L).

  When the touch sensor 51 is pressed, the pulse number of the right stepping motor 35R is set to the pulse number N1, the pulse number of the left stepping motor 35L is set to the pulse number N3, and when the touch sensor 57 is pressed, the pulse of the right stepping motor 35R is set. The number may be the pulse number N2, and the pulse number of the left stepping motor 35L may be the pulse number N4. Instead of the pulse number N1, the pulse number N2, the pulse number N3, and the pulse number N4, the rotation amount Rev1 converted from the pulse number N1, the rotation amount Rev2 converted from the pulse number N2, and the pulse number N3 are converted. Each rotation amount of the rotation amount Rev4 converted from the rotation amount Rev3 and the number of pulses N4 may be associated with the operation of the switch.

  Next, the three-point teaching will be described with reference to FIG. It is assumed that the visual recognition object OB1, the visual recognition object OB2, and the visual recognition object OB3 to be taught are at a distance L1, a distance L2, and a distance L3, respectively.

  The three-point teaching is performed by the user according to the same procedure as the two-point teaching described above. In the right variable focus lens 15R, the pulse number N1 (or rotation amount Rev1) of the right stepping motor 35R when the visual object OB1 can be visually recognized most clearly, and the visual object OB2 can be visually recognized most clearly. The user teaches the pulse number N2 (or rotation amount Rev2) of the right stepping motor 35R and the pulse number N3 (or rotation amount Rev3) of the right stepping motor 35R when the visual object OB3 is most clearly visible. To do. Thereby, the pulse number N1 (or rotation amount Rev1), the pulse number N2 (or rotation amount Rev2), and the pulse number N3 (or rotation amount Rev3) are stored in the storage unit 63 (control unit 25).

  Further, in the left variable focus lens 15L, the pulse number N4 (or the rotation amount Rev4) of the left stepping motor 35L and the visual object OB2 are most clearly visible when the visual object OB1 is most clearly visible. The pulse number N5 (or rotation amount Rev5) of the left stepping motor 35L, and the pulse number N6 (or rotation amount Rev6) of the left stepping motor 35L when the visual object OB3 is most clearly visible can be obtained by the user. Teaches. Thus, the pulse number N4 (or rotation amount Rev4), the pulse number N5 (or rotation amount Rev5), and the pulse number N6 (or rotation amount Rev6) are stored in the storage unit 63 (control unit 25). If the stepping motor 35 is provided with a rotary encoder, the rotary encoder detects the number of pulses from the origin position.

After performing the three-point teaching, when the variable focus glasses 11 are used in the viewpoint switching mode, the mode switching button 55 is pressed to enter the viewpoint switching mode. When the mode switching button 55 is pressed to enter the viewpoint switching mode, the number of pulses (or rotation amount) of the stepping motors 35R and 35L is sequentially described later (1) and (2) each time the touch sensor 51 or the touch sensor 57 is touched. ) And (3), the control unit 25 controls the stepping motor 35 so as to repeat. Thereby, only by touching the touch sensor 51 or the touch sensor 57, the three visual recognition objects OB1, OB2, and OB3 can be clearly and sequentially visually recognized.

(1) Right side: number of pulses N1 (rotation amount Rev1), left side: number of pulses N4 (rotation amount Rev4)
(2) Right side: number of pulses N2 (rotation amount Rev2), left side: number of pulses N5 (rotation amount Rev5)
(3) Right side: pulse number N3 (rotation amount Rev3), left side: pulse number N6 (rotation amount Rev6)

  That is, by performing the teaching, the operation of the touch sensor and the pulse number (or rotation amount) are associated with each other, and the operation of the touch sensor 51 and the touch sensor 57 causes the pulse number N1 (rotation amount Rev1) of the right stepping motor 35R. , Pulse number N2 (rotation amount Rev2), pulse number N3 (rotation amount Rev3), left stepping motor 35L pulse number N4 (rotation amount Rev4), pulse number N5 (rotation amount Rev5), pulse number N6 (rotation amount Rev6) ) Can be specified.

  There are various methods for associating the touch sensor with the driving amount. For example, each time the touch sensor 51 is touched, the control unit 25 may control the stepping motor 35 so as to sequentially repeat the above-described (1), (2), and (3). Further, the control unit 25 may control the stepping motor 35 so as to repeat the above-described (1), (2), and (3) sequentially each time the touch sensor 57 is touched. Each time the touch sensor 51 is touched, the number of pulses taught in advance is set to be larger, and every time the touch sensor 57 is touched, the number of pulses taught in advance is smaller. It may be made to become.

  In the example described above, the case where the visual recognition target object is 2 points or 3 points has been described, but it may be 4 points or more.

According to the above configuration, when a predetermined operation is performed on the touch sensor 51 and the touch sensor 57, the drive unit 23 provided for each variable focus lens 15 (the right variable focus lens 15R and the left variable focus lens 15L). The driving amount is at a predetermined distance stored in advance for each variable focus lens 15 (the right variable focus lens 15R and the left variable focus lens 15L) designated by the operation of the touch sensor 51 and the touch sensor 57. The control unit 25 can individually control the drive unit 23 so as to have a drive amount when the user of the variable focus glasses 11 can clearly see the visual target object. This driving amount is a driving amount when the user can clearly visually recognize the object to be visually recognized. Since the driving amount is taught by the user, a user with different visual acuity and left and right visual acuity can be easily operated. Different users can clearly see the visual recognition object. Therefore, as in the conventional example, users with different visual acuity, use with different left and right visual acuity without manually rotating the dial one by one or without adjusting the focal length of the left and right variable focus lenses one by one The person himself / herself can visually recognize the visual recognition object clearly by a simple operation. As a result, versatile variable-focus glasses that allow users with different visual acuity and users with different left-right visual acuity to clearly and visually recognize objects at different distances by simple operations. Can be provided.

If the touch sensor 51 or the touch sensor 57 is not touched, the drive amount (number of pulses, rotation amount, etc.) does not change (if the switch is not operated), so that the user can clearly select a specific visual target object. When visually recognizing, the driving amount (number of pulses, amount of rotation, etc.) is not switched even if there is another disturbance element (for example, another object to be viewed crosses). For this reason, a visual recognition target object can be visually recognized stably, and the several visual recognition object in a different distance can be visually recognized separately.

  The variable focus glasses 11 use a touch sensor as a switch. For this reason, it is possible to visually recognize an object to be visually recognized simply by touching with a finger, and it is possible to provide variable focus glasses with good operability.

  Compared with liquid crystal variable focus glasses (or liquid crystal electronic glasses) that enclose a dielectric material such as liquid crystal in the lens and control the refractive index by changing the dielectric constant by lacking voltage. However, generally, the light transmittance in the lens does not decrease. Therefore, the brightness does not decrease, the pupil diameter of the user increases, the depth of focus becomes shallow, and it is difficult to focus, and the user is not burdened. Further, since the aperture can be made large, the field of view is not limited.

(Detailed description of the control unit 25 in the first embodiment)
The control part 25 in 1st Embodiment is demonstrated in detail using FIG. As shown in FIG. 6, the control unit 25 includes a CPU 61, a storage unit 63, and a predetermined interface 65. The CPU 61 has a function of reading a control program stored in the storage unit 63 and performing various processes.

  The storage unit 63 includes a RAM 67 and a ROM 69. The RAM 67 has a function of storing various flags, variable values, and the like as a temporary storage area for control programs and execution programs. The ROM 69 also stores a control program for controlling the stepping motor 35, an execution program for executing various controls by determining a signal input by operating a switch, which will be described later, and initial data.

  The storage unit 63 described above indicates the amount of driving of the driving unit 23 (such as the number of pulses of the stepping motor 35) when the user visually recognizes the visual recognition object individually and can visually recognize the visual recognition object. It has a function to memorize. The above-described driving amount is taught by the user by the teaching means described above. When the user teaches, the drive amount is stored in the storage unit 63 (the control unit 25, broadly, the variable focus glasses 11).

  In addition to the storage unit 63 described above, a part for storing the drive amount of the drive unit 23 (for example, the storage unit 71 shown in FIG. 6) may be provided.

(Second Embodiment)
The second embodiment relates to voltage application type variable focus glasses among the variable focus glasses. 7 is a plan view of the variable focus glasses 11, FIG. 8 is a front view of the variable focus glasses, FIG. 9 is a side view as viewed from the direction A of FIG. 7, and FIG. 10 is viewed from the direction B of FIG. FIG. 11 is a side view of the variable focus glasses 11. As shown in FIG. 7, the varifocal glasses 11 constitute a front portion of the spectacle frame 13, and include a front 17 that holds a pair of left and right varifocal lenses 15, and a temple 19 that continues to the front 17. In the second embodiment, the temple 19 and the front 17 are connected by using a screw to form a bendable structure, similar to general foldable glasses, but the temple 19 and the front 17 May be formed integrally.

  In the following description, a pair of left and right varifocal lenses 15 and temples 19 are used separately as necessary as necessary. That is, of the pair of left and right variable focus lenses 15, with the user wearing variable focus glasses 11, the right variable focus lens is referred to as a variable focus lens 15R, and the left variable focus lens is referred to as a variable focus lens 15L. Shall. Further, the right temple is referred to as a temple 19R and the left temple is referred to as a temple 19L with the user wearing the variable focus glasses 11. The drive unit 23 provided on the right temple 19R is referred to as a drive unit 23R, and the drive unit 23 provided on the left temple 19L is referred to as a drive unit 23L.

  The varifocal lens 15 described above has, for example, a configuration as disclosed in the re-published patent WO2009 / 081542, and when a voltage is applied to the liquid crystal element provided in the varifocal lens 15, the direction of the liquid crystal molecules depends on the voltage. This is a well-known variable focus lens that changes the focal length by changing the refractive index by using the change of the lens.

  The right temple 19R is provided with a drive unit 23R that applies a predetermined applied voltage to the liquid crystal element of the right variable focus lens 15R, and a power supply unit 27 that supplies electric power to the control unit 25. The left temple 19L is provided with a drive unit 23L that applies a predetermined applied voltage to the liquid crystal element of the left variable focus lens 15L, and a control unit 25 that controls the drive units 23R and 23L. The electric power supplied from the power supply unit 27 is transmitted to the control unit 25 and the drive unit 23 via the wiring 29. The wiring 29 described above may be a wiring pattern formed on a film by etching, copper foil pasting, or the like. By forming the wiring pattern on the film, the spectacle frame 13 can be reduced in size.

  Next, the drive unit 23 will be described. As shown in FIG. 11, the drive unit 23 includes a drive control circuit 73, drivers 75 and 77, and a variable resistance circuit 79, and a voltage application unit that applies a predetermined application voltage to the liquid crystal element of the variable focus lens 15. It functions as a driving means for driving the liquid crystal element of the variable focus lens 15. The drive control circuit 73 generates a drive signal for driving the liquid crystal element of the variable focus lens 15. The drivers 75 and 77 control the drive signal generated by the drive control circuit 73 and apply a predetermined applied voltage to the liquid crystal element of the variable focus lens 15. The applied voltage (applied voltage amount) applied to the liquid crystal element of the varifocal lens 15 constitutes an example of the drive amount of the present invention.

  A variable resistance circuit 79 that varies the applied voltage is provided downstream of the drivers 75 and 77, and the applied voltage applied to the liquid crystal element of the variable focus lens 15 can be changed stepwise or continuously. When the voltage applied to the liquid crystal element is gradually increased by controlling the variable resistance circuit 79, the elliptical long axis of the liquid crystal molecules is gradually aligned in parallel with the optical axis of the variable focus lens, and the focal length is increased. It becomes longer stepwise or continuously (lowering the refractive index). Further, when the variable resistance circuit 79 is controlled and the applied voltage applied to the liquid crystal element is gradually lowered, the elliptical long axis of the liquid crystal molecules gradually returns to the original state, and the focal length is shortened stepwise or continuously ( The refractive index will be higher).

  Next, the control unit 25 will be described. As shown in FIG. 11, the control unit 25 includes a CPU 61, a storage unit 63, and a predetermined interface 65. The CPU 61 has a function of reading a control program stored in the storage unit 63 and performing various processes.

  The storage unit 63 includes a RAM 67 and a ROM 69. The RAM 67 has a function of storing various flags, variable values, and the like as a temporary storage area for control programs and execution programs. The ROM 69 calculates an applied voltage to be applied to the liquid crystal element of the varifocal lens 15, determines a control program for controlling the drive unit 23, a signal input by an operation of a switch described later, and executes various controls. An execution program, initial data, and the like are stored.

  Moreover, the memory | storage part 63 mentioned above has a function which memorize | stores the applied voltage of the drive part 23 when a user visually recognizes the visual recognition object separately, and can visually recognize the visual recognition object visually recognized. . The above-described applied voltage is taught by the user by the teaching means described later. When the user teaches, the applied voltage is stored in the storage unit 63 (the control unit 25, broadly, the variable focus glasses 11).

  In addition, you may provide the part (for example, the memory | storage part 71 of FIG. 6) which memorize | stores the applied voltage of the drive part 23 separately from the memory | storage part 63 mentioned above.

  Next, the operation unit 47 will be described. An operation unit 47 is provided on the right temple 19 and the left temple 19L. As shown in FIG. 11, the right temple 19 of the operation unit 47 is provided with a power switch 49 for turning on / off the power, a touch sensor 51, and a teaching button 53. Further, as shown in FIG. 11, the left temple 19L of the operation unit 47 is provided with a mode switching button 55, a touch sensor 57, and a registration button 59.

  When the touch sensor 51 or the touch sensor 57 is touched, a predetermined detection signal is input to the control unit 25. The touch sensor 51 and the touch sensor 57 constitute an example of the switch of the present invention. In addition to the touch sensor described above, the switch may be another switch such as a push button switch or a proximity switch.

  The mode switching button 55 switches modes. When the mode switching button 55 described above is pressed, the viewpoint switching mode, constant mode, arbitrary mode, and teaching mode can be switched.

The viewpoint switching mode is a mode in which the focal length is individually switched for a plurality of viewing objects at different distances, and the liquid crystal of the right variable focus lens 15R is provided so that the user can clearly see the viewing object. In this mode, the applied voltage applied to the liquid crystal element of the left variable focus lens 15L is controlled to change the focal length of the right variable focus lens 15R and the left variable focus lens 15L. The constant mode is a mode in which the focal length is made constant when inconvenience occurs when the focal length changes, such as when driving an automobile. The arbitrary mode is a mode in which the focal length is changed by manual control so that the user can clearly see the visual object each time the visual object is in an arbitrary position.

By the way, since a user's visual acuity differs individually, according to a user, you must make it the visual recognition object in a predetermined distance clearly visible . In order to adjust the focal length so that the visually recognized object can be clearly seen, the user gives instructions in advance. To perform teaching, the mode switching button 55 is pressed to enter teaching mode.

  When the user touches the touch sensor 51 with a finger during the teaching mode, a predetermined detection signal is input to the control unit 25. Then, when the user removes his / her finger from the touch sensor 51, the detection signal input described above is stopped. The control unit 25 controls the right drive unit 23R so that the applied voltage applied to the liquid crystal element of the right variable focus lens 15R is alternately increased and decreased every time a detection signal is input. While the touch sensor 51 is touched, the increase and decrease of the applied voltage are maintained, and when the finger is released, it stops.

  Similarly, when the user touches the touch sensor 57 with a finger during the teaching mode, a predetermined detection signal is input to the control unit 25. Then, when the user removes his / her finger from the touch sensor 57, the input of the detection signal described above is stopped. The control unit 25 controls the left drive unit 23L so as to alternately increase and decrease the applied voltage applied to the liquid crystal element of the left variable focus lens 15L each time a detection signal is input. While the touch sensor 57 is being touched, the increase and decrease of the applied voltage are maintained, and when the finger is released, it stops.

  Teaching includes two-point teaching that teaches two points of perspective, three-point teaching that teaches three points, multi-point teaching that teaches multiple points, and the like.

  The two-point teaching will be described. First, a teaching procedure in the right variable focus lens 15R will be described. In FIG. 7, the user covers the left variable focus lens 15 </ b> L with his / her hand and visually recognizes the visual object OB <b> 1 located at a first distance (for example, a distance L <b> 1 = 30 cm from the eyeglass frame 13 to the visual object OB <b> 1). . Next, the user touches the touch sensor 51 described above with his / her finger or releases his / her finger to drive the right drive unit 23 </ b> R so that the object OB <b> 1 can be visually recognized most clearly. The focal length of the lens 15R is changed. Then, the teaching button 53 is pressed. At this time, the applied voltage V1 applied to the liquid crystal element of the right variable focus lens 15R is stored in the storage unit 63 (control unit 25).

  Next, the user covers the left variable focus lens 15L with his / her hand, and visually recognizes the visual recognition object OB2 at the second distance (for example, the distance L2 = 100 cm from the spectacle frame 13 to the visual recognition object OB2). Next, the user can touch the touch sensor 51 described above with his / her finger or release his / her finger to drive the right drive unit 23 </ b> R so that the object OB <b> 2 can be visually recognized most clearly. The focal length of the lens 15R is changed. Then, the teaching button 53 is pressed. At this time, the applied voltage V2 applied to the liquid crystal element of the right variable focus lens 15R is stored in the storage unit 63 (control unit 25).

  A teaching procedure in the left variable focus lens 15L will be described. In FIG. 7, the user covers the right variable focus lens 15 </ b> R with his hand and visually recognizes the above-described visual object OB <b> 1. Next, the user touches or touches the touch sensor 57 described above with his / her finger to drive the left drive unit 23L so that the visual object OB1 can be visually recognized most clearly. The focal length of the lens 15L is changed. Then, the teaching button 53 is pressed. At this time, the applied voltage V3 applied to the liquid crystal element of the left variable focus lens 15L is stored in the storage unit 63 (control unit 25).

  Next, the user covers the right varifocal lens 15R with his / her hand and visually recognizes the above-described visual object OB2. Next, the user touches the touch sensor 57 with the finger or releases the finger to drive the left drive unit 23L, so that the visual object OB2 can be visually recognized most clearly. The focal length of the lens 15L is changed. Then, the teaching button 53 is pressed. At this time, the applied voltage V4 applied to the liquid crystal element of the left variable focus lens 15L is stored in the storage unit 63 (control unit 25).

  The touch sensor 51, the touch sensor 57, the teaching button 53, and the storage unit 63 (control unit 25) described above constitute an example of a teaching unit.

  When the teaching is completed, the operation of the touch sensor and the number of pulses are related by the program stored in the control unit 25. For example, when the operation A is performed on the touch sensor, the applied voltage to the liquid crystal element of the right variable focus lens 15R is set to V1, the applied voltage to the liquid crystal element of the left variable focus lens 15L is set to V3, and the touch sensor On the other hand, when the operation B is performed, the voltage applied to the liquid crystal element of the right variable focus lens 15R is set to V2, and the voltage applied to the liquid crystal element of the left variable focus lens 15L is set to V4. On the other hand, an applied voltage to each liquid crystal element is associated. That is, by operating the touch sensor 51 and the touch sensor 57, the applied voltage V1 and applied voltage V2 for the liquid crystal element of the right variable focus lens 15R, and the applied voltage V3 and applied voltage V4 for the liquid crystal element of the left variable focus lens 15L are designated. can do. The touch sensor 51 and the touch sensor 57 have a function of specifying an applied voltage.

After performing the two-point teaching, when the variable focus glasses 11 are used in the viewpoint switching mode, the mode switching button 55 is pressed to enter the viewpoint switching mode. When the mode switching button 55 is pressed to change to the viewpoint switching mode, the applied voltage to the liquid crystal element of the right variable focus lens 15R and the liquid crystal element of the left variable focus lens 15L is alternately changed every time the touch sensor 51 or the touch sensor 57 is touched. In addition, the control unit 25 controls the right drive unit 23R and the left drive unit 23L so that the applied voltages in the items (1) and (2) described later are obtained. That is, the variable-focus eyeglasses 11 of the second embodiment reproduces the applied voltage taught in advance for each of the right-side variable-focus lens 15R and the left-side variable-focus lens 15L. It is possible to focus on OB1 and OB2 alternately. As a result, each time the user touches the touch sensor 51 or the touch sensor 57, the user can visually clearly and visually recognize the two visual objects OB1 and OB2 at two points.

(1) Right side: applied voltage V1, left side: applied voltage V3
(2) Right side: applied voltage V2, left side: applied voltage V4

  There are various methods for associating the touch sensor with the applied voltage. For example, every time one of the touch sensors 51 and 57 is touched, the voltage applied to the liquid crystal element of the right variable focus lens 15R and the liquid crystal element of the left variable focus lens 15L are alternately changed. The control unit 25 may control the drive units 23R and 23L so that the applied voltages in the above-described items (1) and (2) are obtained.

  When the touch sensor 51 is pressed, the applied voltage to the liquid crystal element of the right variable focus lens 15R is set to the applied voltage V1, the applied voltage to the liquid crystal element of the left variable focus lens 15L is set to the applied voltage V3, and the touch sensor 57 is pressed. The applied voltage to the liquid crystal element of the right variable focus lens 15R may be the applied voltage V2, and the applied voltage to the liquid crystal element of the left variable focus lens 15L may be the applied voltage V4.

  Next, the three-point teaching will be described with reference to FIG. It is assumed that the visual recognition object OB1, the visual recognition object OB2, and the visual recognition object OB3 to be taught are at a distance L1, a distance L2, and a distance L3, respectively.

  The three-point teaching is performed by the user according to the same procedure as the two-point teaching described above. In the right variable focus lens 15R, when the visual object OB1 is most clearly visible, the voltage V1 applied to the liquid crystal element of the right variable focus lens 15R and the right object OB2 when the visual object OB2 is most clearly visible. The user teaches the voltage V2 applied to the liquid crystal element of the variable focus lens 15R and the voltage V3 applied to the liquid crystal element of the right variable focus lens 15R when the visual object OB3 is most clearly visible. As a result, the applied voltage V1, the applied voltage V2, and the applied voltage V3 are stored in the storage unit 63 (control unit 25).

  Further, in the left variable focus lens 15L, the voltage V4 applied to the liquid crystal element of the left variable focus lens 15L and the visual object OB2 are most clearly visible when the visual object OB1 is most clearly visible. When the user teaches the voltage V5 applied to the liquid crystal element of the left variable focus lens 15L and the voltage V6 applied to the liquid crystal element of the left variable focus lens 15L when the visual object OB3 is most clearly visible, the applied voltage V4, applied voltage V5, and applied voltage V6 are stored in the storage unit 63 (control unit 25).

After performing the three-point teaching, when the variable focus glasses 11 are used in the viewpoint switching mode, the mode switching button 55 is pressed to enter the viewpoint switching mode. When the mode switching button 55 is pressed to change to the viewpoint switching mode, each time the touch sensor 51 or the touch sensor 57 is touched, the applied voltage to the liquid crystal element of the right variable focus lens 15R and the liquid crystal element of the left variable focus lens 15L is sequentially changed. , (1), (2), (3), the control unit 25 controls the drive unit 23 so as to repeat. Thereby, only by touching the touch sensor 51 or the touch sensor 57, the three visual recognition objects OB1, OB2, and OB3 can be clearly and sequentially visually recognized.

(1) Right side: applied voltage V1, left side: applied voltage V4
(2) Right side: applied voltage V2, left side: applied voltage V5
(3) Right side: applied voltage V3, left side: applied voltage V6

  That is, by performing the teaching, the operation of the touch sensor and the applied voltage are associated with each other, and the operation of the touch sensor 51 and the touch sensor 57 causes the applied voltage V1, the applied voltage V2, and the applied voltage to the liquid crystal element of the right variable focus lens 15R. The voltage V3, the applied voltage V4, the applied voltage V5, and the applied voltage V6 for the liquid crystal element of the left variable focus lens 15L can be designated.

  There are various methods for associating the touch sensor with the applied voltage. For example, each time the touch sensor 51 is touched, the control unit 25 may control the drive unit 23 so as to sequentially repeat the above (1), (2), and (3). In addition, the control unit 25 may control the drive unit 23 so as to repeat the above-described (1), (2), and (3) each time the touch sensor 57 is touched. Further, every time the touch sensor 51 is touched, the applied voltage is set to a larger applied voltage among the previously taught applied voltages, and every time the touch sensor 57 is touched, a smaller applied voltage is applied to the previously taught applied voltages. It may be made to become.

  In the example described above, the case where the visual recognition target object is 2 points or 3 points has been described, but it may be 4 points or more.

According to the above configuration, when a predetermined operation is performed on the touch sensor 51 and the touch sensor 57, the applied voltage to the liquid crystal element of the right variable focus lens 15R and the applied voltage to the liquid crystal element of the left variable focus lens 15L are touched. The object to be viewed at a predetermined distance, which is previously stored in each variable focus lens 15 (the right variable focus lens 15R and the left variable focus lens 15L), which is designated by the operation of the sensor 51 and the touch sensor 57, is variable. The control unit 25 can individually control the drive units 23R and 23L so as to obtain an applied voltage (drive amount) when the user of the focus glasses can clearly see. Since this driving amount is an applied voltage (driving amount) when the user can clearly visually recognize the object to be viewed individually, a user with different visual acuity and a user with different left and right visual acuity by simple operation However, the visual recognition object can be clearly visually recognized. Therefore, as in the conventional example, users with different visual acuity, use with different left and right visual acuity without manually rotating the dial one by one or without adjusting the focal length of the left and right variable focus lenses one by one The person himself / herself can visually recognize the visual recognition object clearly by a simple operation. As a result, versatile variable-focus glasses that allow users with different visual acuity and users with different left-right visual acuity to clearly and visually recognize objects at different distances by simple operations. Can be provided.

Further, if the touch sensor 51 or the touch sensor 57 is not touched, the applied voltage (driving amount) does not change (if the switch is not operated), so that the user can clearly see a specific visual target. In this case, the applied voltage (driving amount) does not switch even if there is another disturbance element (for example, another object to be viewed crosses). For this reason, a visual recognition target object can be visually recognized stably, and the several visual recognition object in a different distance can be visually recognized separately.

  The variable focus glasses 11 use a touch sensor as a switch. For this reason, it is possible to visually recognize an object to be visually recognized simply by touching with a finger, and it is possible to provide variable focus glasses with good operability.

(Third embodiment)
In the liquid variable focus glasses described in the first embodiment, the third embodiment is configured such that one side of each of the right variable focus lens 15R and the left variable focus lens 15L is placed on a viewing target at an arbitrary distance. This is an embodiment for adjusting the focal length. Hereinafter, the procedure for adjusting the focal length will be described. In order to adjust the focal length to the object to be viewed at an arbitrary distance, the mode switching button 55 is pressed to enter the arbitrary mode.

  When the user touches the touch sensor 51 with a finger in the arbitrary mode, a predetermined detection signal is input to the control unit 25. Then, when the user releases his / her finger from the touch sensor 51, the input of the detection signal is stopped. At this time, every time a detection signal is input to the control unit 25, the control unit 25 controls the right stepping motor 35R so that the shaft 35a of the right stepping motor 35R repeats forward rotation and reverse rotation alternately. While the touch sensor 51 is being touched, normal rotation or reverse rotation of the shaft 35a is maintained, and when the finger is released, the shaft 35a stops.

  Similarly, when the user touches the touch sensor 57 with a finger in the arbitrary mode, a predetermined detection signal is input to the control unit 25. Then, when the user removes his / her finger from the touch sensor 57, the input of the detection signal is stopped. At that time, every time a detection signal is input, the control unit 25 controls the left stepping motor 35L so that the shaft 35a of the left stepping motor 35L repeats forward rotation and reverse rotation alternately. While the touch sensor 57 is being touched, normal rotation or reverse rotation of the shaft 35a is maintained, and when the finger is released, it stops.

  By the above-described operation, the user touches the touch sensors 51 and 57 with the finger or releases the finger to drive the right drive unit 23R and the left drive unit 23L to visually recognize at an arbitrary distance. It is possible to make the object visible most clearly.

According to this, the focal length of the varifocal lens 15 can be changed so that the user can clearly see an arbitrary visual target. Since the focal length of the variable focus glasses 11 can be changed by the touch sensor, it is not necessary to manually rotate the dial one by one as in the conventional example. As a result, it is possible to provide variable focus glasses that can eliminate the troublesome focus adjustment.

(Fourth embodiment)
In the voltage application type variable focus spectacles described in the second embodiment, the fourth embodiment is arranged such that a right-side variable focus lens 15R and a left variable focus lens 15L are placed on one side of a visual target at an arbitrary distance. In this example, the focal lengths are adjusted one by one. Hereinafter, the procedure for adjusting the focal length will be described. In order to adjust the focal length to the object to be viewed at an arbitrary distance, the mode switching button 55 is pressed to enter the arbitrary mode.

  When the user touches the touch sensor 51 with a finger in the arbitrary mode, a predetermined detection signal is input to the control unit 25. Then, when the user releases his / her finger from the touch sensor 51, the input of the detection signal is stopped. At this time, each time a detection signal is input, the control unit 25 controls the right drive unit 23R so that the applied voltage applied to the liquid crystal element of the right varifocal lens 15R alternately increases and decreases. Control. While the touch sensor 51 is touched, the increase and decrease of the applied voltage are maintained, and when the finger is released, it stops.

  Similarly, when the user touches the touch sensor 57 with a finger in the arbitrary mode, a predetermined detection signal is input to the control unit 25. Then, when the user removes his / her finger from the touch sensor 57, the input of the detection signal is stopped. At this time, each time a detection signal is input, the control unit 25 controls the left drive unit 23L so that the applied voltage applied to the liquid crystal element of the left variable focus lens 15L alternately increases and decreases. Control. While the touch sensor 57 is touched, the increase and decrease of the applied voltage are maintained, and when the finger is released, it stops.

  By the above-described operation, the user touches the touch sensors 51 and 57 with the finger or releases the finger to drive the right drive unit 23R and the left drive unit 23L to visually recognize at an arbitrary distance. It is possible to make the object visible most clearly.

According to this, when used in an arbitrary mode, the focal length of the variable focus lens 15 can be changed so that the user can clearly see an arbitrary visual target. Since the focal length of the variable focus glasses 11 can be changed by the touch sensor, it is not necessary to manually rotate the dial one by one as in the conventional example. As a result, it is possible to provide variable focus glasses that can eliminate the troublesome focus adjustment.

(Fifth embodiment)
In the third embodiment, the focal length is adjusted to one side for each of the right variable focus lens 15R and the left variable focus lens 15L with respect to a visual target at an arbitrary distance. The focal lengths of the variable focus lens 15R on the right side and the variable focus lens 15L on the left side are adjusted at the same time with respect to the visual recognition object at an arbitrary distance. In order to adjust the focal length simultaneously, teaching is performed in advance. The teaching may be any of two-point teaching, three-point teaching, and multi-point teaching. Here, the two-point teaching described in the first embodiment is performed. As two points to be taught, a visual object OB1 at a first distance (distance L1 from the spectacle frame 13 to the visual object OB1 = 30 cm), a second distance (a distance from the variable focus glasses 11 to the visual object OB2). A visually recognized object OB2 at L2 = 100 cm) is assumed. Further, as an example, the arbitrary visual object OB3 is assumed to be at an intermediate point between the visual object OB1 described above and the visual object OB2 (distance L3 = 65 cm from the spectacle frame 13 to the arbitrary visual object). To explain. (See Figure 1)

  When the teaching is performed, when the object OB1 at the first distance is clearly seen, the pulse number N1 of the right stepping motor 35R and the pulse number N3 of the left stepping motor 35L are visually recognized at the second distance. The number of pulses N2 of the right stepping motor 35R and the number of pulses N4 of the left stepping motor 35L when the object OB2 is clearly visible are stored in the storage unit 63. After performing the two-point teaching, the mode switching button 55 is pressed to enter the arbitrary mode.

  In the arbitrary mode, in order to adjust the focal length to an arbitrary visual recognition object, the user operates the touch sensor 51 and the touch sensor 57 to perform the operation of adjusting the focal length. When the touch sensor 51 is pressed, the control unit 25 drives the right stepping motor 35R and the left stepping so that the focal length gradually increases, and when the touch sensor 57 is pressed, the focal length gradually decreases. The drive amount of the motor 35L is controlled.

  By the way, in order to obtain the pulse number NR of the right stepping motor 35R and the pulse number NL of the left stepping motor 35L when an arbitrary visual object OB3 can be clearly seen, a certain calculation formula is used. Since this calculation formula varies depending on the lens shape of the variable focus lens, the control method of the drive unit, and the like, the calculation formula most suitable for each variable focus spectacle is used.

  In the fifth embodiment, a calculation formula composed of the driving amount of the stepping motor and the distance to the visual recognition object is used, and (Formula 1) and (Formula 2) are applied as an example. (Expression 1) is a calculation expression that passes through (x1, y1) = (distance L1, pulse number N1) and (x2, y2) = (distance L2, pulse number N2). (Formula 2) is a calculation formula that passes through (x1, y1) = (distance L1, pulse number N3) and (x2, y2) = (distance L2, pulse number N4). The calculation formulas of (Formula 1) and (Formula 2) are shown in FIG.

(Formula 1) NR = a1 × (Ln−L1) + N1
(Formula 2) NL = a2 × (Ln−L1) + N3

  A1 in (Expression 1) is an increase in the number of pulses per unit distance for the right stepping motor 35R. A2 in (Expression 2) is an increment of the number of pulses per unit distance for the left stepping motor 35L. A1 in (Expression 1) and a2 in (Expression 2) are calculated by (Expression 3) and (Expression 4).

(Formula 3) a1 = (N2-N1) / (L2-L1)
(Formula 4) a2 = (N4-N3) / (L2-L1)

  By substituting (Equation 3) and (Equation 4) into (Equation 1) and (Equation 2), respectively, (Equation 5) and (Equation 6) can be obtained.

(Formula 5) NR = (N2−N1) × (Ln−L1) / (L2−L1) + N1
(Formula 6) NL = (N4−N3) × (Ln−L1) / (L2−L1) + N3
However,
NR: Number of pulses (pulses) of the stepping motor 35R on the right side when an arbitrary object OB3 can be clearly seen
NL: Number of pulses (pulses) of the left stepping motor 35L when an arbitrary visual object OB3 can be clearly seen
N1: Number of pulses (pulses) of the stepping motor 35R on the right side when the visual object OB1 at the first distance can be clearly seen
N2: Number of pulses (pulses) of the right stepping motor 35R when the visual object OB2 at the second distance can be clearly seen
N3: Number of pulses (pulses) of the left stepping motor 35L when the visual object OB1 at the first distance can be clearly seen
N4: Number of pulses (pulses) of the left stepping motor 35L when the visual object OB2 at the second distance can be clearly seen
Ln: Distance (cm) to an arbitrary visual object OB3
L1: Distance (cm) to the visual object OB1 at the first distance
L2: Distance (cm) to the visual object OB2 at the second distance

The operation will be described. When the user operates the touch sensor 51 in a state where the focal distance is closer to the near side (the visual object OB1 side) than the arbitrary visual object OB3, the focal distance becomes gradually longer. At this time, the control unit 25 simultaneously controls the right stepping motor 35R and the left stepping motor 35L so that the pulse numbers NR and NL correspond to the focal length based on the above calculation formula. When the focal length is matched to the visual target object OB3 at an arbitrary distance, the user can clearly see the arbitrary visual target object OB3.

  Incidentally, if the distance L1 = 30 cm, L2 = 100 cm, Ln = 65 cm, N1 = 600 pulses, N2 = 2000 pulses, the pulse number NR of the right stepping motor 35R is 1300 pulses.

  If the distances L1 = 30 cm, L2 = 100 cm, Ln = 65 cm, N3 = 700 pulses and N4 = 2400 pulses, the number of pulses NL of the left stepping motor 35L is 1550 pulses.

  It should be noted that even if the touch sensor 57 is pressed in a state where the focal distance is closer to the far side (the visual object OB2 side) than the arbitrary visual object OB3, the focal distance may be arbitrarily shortened. The focal length can be adjusted to the visual object OB3. Detailed description is omitted.

  In the example described above, the number of pulses N1, the number of pulses N2, the number of pulses N3, and the number of pulses N4 are used in the calculation formula. Instead, the rotation amount Rev1 converted from the number of pulses N1 and the number of pulses converted from the number of pulses N2 are used. The rotation amount Rev2, the rotation amount Rev3 converted from the pulse number N3, and the rotation amount Rev4 converted from the pulse number N4 may be used.

  According to this, since the user can simultaneously adjust the focal length of the right variable focal lens 15R and the focal length of the left variable focal lens 15L with respect to an arbitrary visual object, any visual object On the other hand, it is not necessary to adjust the focal lengths of the right variable focus lens 15R and the left variable focus lens 15L one by one. As a result, it is possible to provide variable focus glasses that can eliminate the troublesome focus adjustment.

(Sixth embodiment)
In the fourth embodiment, the focal length is adjusted to one side for each of the right variable focus lens 15R and the left variable focus lens 15L with respect to the object to be viewed at an arbitrary distance. In the sixth embodiment, The focal lengths of the variable focus lens 15R on the right side and the variable focus lens 15L on the left side are adjusted at the same time with respect to the visual recognition object at an arbitrary distance. In order to adjust the focal length simultaneously, teaching is performed in advance. The teaching may be any of two-point teaching, three-point teaching, and multi-point teaching, but here, the two-point teaching described in the second embodiment is performed. As two points to be taught, a visual object OB1 at a first distance (distance L1 from the spectacle frame 13 to the visual object OB1 = 30 cm), a second distance (a distance from the variable focus glasses 11 to the visual object OB2). A visually recognized object OB2 at L2 = 100 cm) is assumed. Further, as an example, the arbitrary visual object OB3 is assumed to be at an intermediate point between the visual object OB1 described above and the visual object OB2 (distance L3 = 65 cm from the spectacle frame 13 to the arbitrary visual object). To explain. (See Figure 13)

  When the teaching is performed, the voltage V1 applied to the liquid crystal element of the right variable focus lens 15R and the voltage V3 applied to the liquid crystal element of the left variable focus lens 15L when the object OB1 at the first distance is clearly seen The voltage V2 applied to the liquid crystal element of the right variable focus lens 15R and the voltage V4 applied to the liquid crystal element of the left variable focus lens 15L when the visual object OB2 at the second distance can be clearly seen are stored in the storage unit. 63. After performing the two-point teaching, the mode switching button 55 is pressed to enter the arbitrary mode.

  In the arbitrary mode, in order to adjust the focal length to an arbitrary visual recognition object, the user operates the touch sensor 51 and the touch sensor 57 to perform the operation of adjusting the focal length. When the touch sensor 51 is pressed, the control unit 25 applies to the liquid crystal element of the right variable focus lens 15R so that the focal length is gradually increased, and when the touch sensor 57 is pressed, the focal length is gradually shortened. The voltage and the voltage applied to the liquid crystal element of the left variable focus lens 15L are controlled.

  By the way, in order to obtain an applied voltage VR to the liquid crystal element of the right variable focus lens 15R and an applied voltage VL to the liquid crystal element of the left variable focus lens 15L when an arbitrary visual object OB3 can be clearly seen, a certain amount is required. Use the formula. Since this calculation formula varies depending on the lens shape of the variable focus lens, the control method of the drive unit, and the like, the calculation formula most suitable for each variable focus spectacle is used.

  In the sixth embodiment, a calculation formula composed of the voltage applied to the liquid crystal element of the variable focus lens and the distance to the visual recognition object is used, and (Formula 1) and (Formula 2) are applied as an example. (Formula 1) is a calculation formula that passes through (x1, y1) = (distance L1, applied voltage V1), (x2, y2) = (distance L2, applied voltage V2). (Formula 2) is a calculation formula that passes through (x1, y1) = (distance L1, applied voltage V3) and (x2, y2) = (distance L2, applied voltage V4). The calculation formulas of (Formula 1) and (Formula 2) are shown in FIG.

(Formula 1) VR = a1 × (Ln−L1) + V1
(Formula 2) VL = a2 * (Ln-L1) + V3

  A1 in (Expression 1) is an increment of applied voltage per unit distance with respect to the liquid crystal element of the right variable focus lens 15R. A2 in (Expression 2) is an increment of applied voltage per unit distance with respect to the liquid crystal element of the variable focus lens 15R on the right side. A1 in (Expression 1) and a2 in (Expression 2) are calculated by (Expression 3) and (Expression 4).

(Formula 3) a1 = (V2-V1) / (L2-L1)
(Formula 4) a2 = (V4-V3) / (L2-L1)

  By substituting (Equation 3) and (Equation 4) into (Equation 1) and (Equation 2), respectively, (Equation 5) and (Equation 6) can be obtained.

(Formula 5) VR = (V2−V1) × (Ln−L1) / (L2−L1) + V1
(Formula 6) VL = (V4-V3) * (Ln-L1) / (L2-L1) + V3
However,
VR: Applied voltage (volt) to the liquid crystal element of the variable focus lens 15R on the right side when an arbitrary object OB3 can be clearly seen
VL: Applied voltage (volt) to the liquid crystal element of the left variable focus lens 15L when an arbitrary object OB3 can be clearly seen
V1: Applied voltage (volt) to the liquid crystal element of the variable focus lens 15R on the right side when the object OB1 at the first distance can be clearly seen
V2: Applied voltage (volt) to the liquid crystal element of the right variable focus lens 15R when the object OB2 at the second distance can be clearly seen
V3: Applied voltage (volt) to the liquid crystal element of the left variable focus lens 15L when the visual object OB1 at the first distance can be clearly seen
V4: Applied voltage (volt) to the liquid crystal element of the left variable focus lens 15L when the object OB2 at the second distance can be clearly seen
Ln: Distance (cm) to an arbitrary visual object OB3
L1: Distance (cm) to the visual object OB1 at the first distance
L2: Distance (cm) to the visual object OB2 at the second distance

The operation will be described. When the user operates the touch sensor 51 in a state where the focal distance is closer to the near side (the visual object OB1 side) than the arbitrary visual object OB3, the focal distance becomes gradually longer. At this time, the control unit 25 applies the applied voltage to the liquid crystal element of the right variable focus lens 15R and the liquid crystal of the left variable focus lens 15L so that the applied voltages VR and VL correspond to the focal length based on the above calculation formula. The applied voltage to the element is controlled simultaneously. When the focal length is matched to the visual target object OB3 at an arbitrary distance, the user can clearly see the arbitrary visual target object OB3.

  It should be noted that even if the touch sensor 57 is pressed in a state where the focal distance is closer to the far side (the visual object OB2 side) than the arbitrary visual object OB3, the focal distance may be arbitrarily shortened. The focal length can be adjusted to the visual object OB3. Detailed description is omitted.

  According to this, since the user can simultaneously adjust the focal length of the right variable focal lens 15R and the focal length of the left variable focal lens 15L with respect to an arbitrary visual object, any visual object On the other hand, it is not necessary to adjust the focal lengths of the right variable focus lens 15R and the left variable focus lens 15L one by one. As a result, it is possible to provide variable focus glasses that can eliminate the troublesome focus adjustment.

(Seventh embodiment)
In the first embodiment, a rotation-linear motion conversion mechanism using a piston, a feed screw shaft, and a stepping motor is used. However, a rack and pinion mechanism may be used. In addition, the same number is attached | subjected about the part similar to FIG. 1, and detailed description is abbreviate | omitted.

  Hereinafter, the drive part 23L provided in the left temple 19L will be described. Since the drive unit 23R provided in the right temple 19 is the same as the drive unit 23L provided in the left temple 19L, detailed description thereof is omitted. FIG. 14 is an enlarged view of the left front and temple 19. 15 is a cross-sectional view taken along line FF in FIG. 16 is a cross-sectional view taken along line GG in FIG. As shown in FIG. 14, the drive unit 81 includes a piston 83, a gear 85, and a stepping motor 35.

  An inner diameter portion 19a is formed in the temple 19, and a piston 83 is built in the inner diameter portion 19a. Of the inner diameter portion 19a, at least a portion where the piston 83 slides is formed in a cylindrical shape, and the storage chamber 37 for storing the transparent liquid 21 is formed by the piston 83 and the inner diameter portion 19a. The piston 83 is formed with a gear cutting portion 83a, and a gear 85 is engaged therewith. That is, the rack 83 and the pinion mechanism are configured by the piston 83 and the gear 85, and the portion corresponding to the rack is the piston 83, so that the drive unit can be reduced in size.

  The shaft 35a of the stepping motor 35 is press-fitted into the inner diameter portion 85a of the gear 85, and when the shaft 35a rotates, the piston 31 moves in the axial direction. When the shaft 35a of the stepping motor 35 rotates clockwise from the opposite side of the shaft 35a as viewed in the direction of the shaft 35a, the piston 31 moves in the direction D shown in FIG. At this time, the transparent liquid 21 stored in the storage chamber 37 moves to the space 15e side through the communication path 13a and the hole 15f. When the transparent liquid 21 flows into the space 15e, the varifocal lens 15 swells in the thickness direction, and the refractive index can be increased (focal length can be shortened).

  When the shaft 35a of the stepping motor 35 rotates counterclockwise when viewed from the opposite side of the shaft 35a in the direction of the shaft 35a, the piston 31 moves in the E direction shown in FIG. At this time, the transparent liquid 21 stored in the space 15e moves to the storage chamber 37 side via the hole 15f and the communication path 13a. When the transparent liquid 21 moves to the storage chamber 37 side, the varifocal lens 15 is contracted in the thickness direction, and the refractive index can be lowered (the focal length can be increased).

  According to the above configuration, it is possible to provide variable focus glasses that can eliminate the troublesome focus adjustment. In addition, since the drive unit can be reduced in size, the variable focus glasses 11 can be configured compactly.

(Eighth embodiment)
In each embodiment described above, the control unit, the power supply unit, and the operation unit are built in the spectacle frame, but the control unit, the power supply unit, and the operation unit may be provided separately from the spectacle frame. As shown in FIG. 17, a remote controller 87 is provided, and the spectacle frame 13 and the remote controller 87 are connected by a power cable 89 including a signal line. The remote controller 87 includes a control unit 25, a power supply unit 27, and an operation unit 91. The drive unit and the control unit (numeral 25 in FIG. 9) will be described as having the same configuration as in the first embodiment.

  The power supply unit 27 supplies power to the control unit 25 and drives the drive unit 23. As described above, the power cable 89 is a power cable including a signal destination, and is formed in a spiral shape so that it can expand and contract. The operation unit 91 is a touch panel using a liquid crystal screen. The operation unit 91 corresponds to the operation unit 47 described in the first embodiment, and can perform various prior settings, mode switching, and the like described in the first embodiment.

  According to the above configuration, since the control unit 25, the power supply unit 27, and the operation unit 91 are provided separately from the spectacle frame, the control unit, the power supply unit, and the operation unit are all mounted on the spectacle frame. The weight of the spectacle frame can be reduced, and variable focus spectacles that are comfortable to wear can be provided.

(Ninth embodiment)
In the second embodiment, the spectacle frame and the operation unit are connected by a power cable including a signal line. However, control generated between the spectacle frame and the operation unit may be wirelessly communicated. . As shown in FIG. 18, the spectacle frame 13 is provided with a control unit 25, a power supply unit 27, and a wireless communication unit 93. The remote controller 87 is provided with an operation unit 91, a wireless communication unit 95, and a power supply unit 103. Bidirectional communication is possible via the wireless communication unit 93 and the wireless communication unit 95.

  When the operation unit 91 provided in the remote controller 87 is operated, a predetermined wireless signal is transmitted from the wireless communication unit 93 to the control unit 25 via the wireless communication unit 95. A signal output from the control unit 25 is wirelessly transmitted from the wireless communication unit 95 to the remote controller 87 via the wireless communication unit 93.

  According to this, since the operation unit 91 is provided in the remote controller 87 and the communication performed between the spectacle frame 13 and the remote controller 87 is wireless communication, the remote controller 87 can be freely arranged. Can be used. As a result, variable focus glasses with good operability and variable focus glasses with high convenience can be provided. If the remote controller 87 is a bracelet controller that can be worn on the wrist or wrist, the operability and convenience are further improved.

(Tenth embodiment)
Although the stepping motor is used in the first embodiment, a DC motor may be used. As shown in FIG. 19, a disk 99 having a notch 99a formed in a part of the outer periphery is fixed to the rotating shaft 97a of the DC motor 97, and when the rotating shaft 97a rotates, the disk 99 rotates. Rotate together. Since the sensor 101 can detect the notch 99a of the disk 99, the control unit can obtain a rotation amount (driving amount) when a visually recognized object at a predetermined distance is clearly visible. it can. Then, if the DC motor 97 is operated by the amount of rotation (drive amount), a visual target object at a predetermined distance can be clearly seen. An encoder may be used instead of the sensor 101. In addition, the drive unit of the drive unit may be a servo motor, a linear motor, or the like.

(Eleventh embodiment)
The liquid variable focus glasses described above include distance measuring means (for example, a distance measuring sensor, a photoelectric sensor, etc.) for measuring the distance to the visual recognition object, and the focal length is determined according to the distance measured by the distance measuring means. It is also possible to use liquid variable focus glasses that change the angle. FIG. 20 is a plan sectional view of the variable focus glasses 11 provided with the distance measuring means 45. In addition, it replaces with the distance measurement means mentioned above, and the visual recognition object detection means (for example, photoelectric sensor etc.) which detects the presence or absence of a predetermined visual recognition object may be provided.

(Twelfth embodiment)
Similar to the eleventh embodiment, the voltage application variable focus glasses described above include distance measuring means (for example, a distance measuring sensor, a photoelectric sensor, etc.) for measuring the distance to the visual recognition object. It may be voltage application type variable focus glasses that change the focal length according to the measured distance. In addition, it replaces with the distance measurement means mentioned above, and the visual recognition object detection means (for example, photoelectric sensor etc.) which detects the presence or absence of a predetermined visual recognition object may be provided.

(Other embodiments)
In the first embodiment, the rotary encoder is used as the drive amount detection means, but the present invention is not limited to this. For example, a potentiometer or resolver that performs analog output may be used. Further, a specific position of the drive unit, for example, the movement amount of the piston described in the first embodiment may be detected by a sensor, a linear encoder, or the like. In this case, the moving amount of the piston is the driving amount, and the sensor, the linear encoder, etc. serve as the driving amount detecting means.

  In the first embodiment, the piston is controlled using a stepping motor, but the piston may be controlled using a pump. In this case, if a movable amount detecting means (for example, a linear sensor) for detecting the movable amount (driving amount) of the piston is provided, the transparent liquid can be controlled more accurately than in the method controlled by the valve. In addition, a drive unit that drives a dial provided in a reservoir described in the variable focus glasses disclosed in Patent Document 1 may be provided, and the drive unit may be automatically controlled.

  There are various calculation formulas for obtaining the pulse numbers NR and NL described in the fifth embodiment, and the present invention is not limited to these.

  Further, there are various calculation formulas for obtaining the applied voltages VR and VL described in the sixth embodiment, and the present invention is not limited to this.

  In the eighth embodiment, the control unit, the power supply unit, and the operation unit are provided separately from the spectacle frame. However, at least one of the control unit, the power supply unit, and the operation unit is provided separately from the spectacle frame. It may be provided.

  In the eighth embodiment, the control unit 25, the power supply unit 27, and the operation unit 91 are separated from the spectacle frame 13. However, the driving unit 23 may be provided separately from the spectacle frame 13. Further, the control unit 25, the power supply unit 27, the operation unit 91, and the drive unit 23 which are separately provided may be provided in the remote controller 87. In this case, for example, the drive unit 23 may be built in the remote controller 87 shown in FIG. 17 and a pipe connected to the spectacle frame 13 side may be provided integrally with the power cable 89. In the spectacle frame 13, a pipe line connected to the variable focus lens 15 is formed.

  The eighth embodiment is a modification of the liquid variable focus lens. However, the same configuration is applied to the voltage application variable focus glasses described above, and the spectacle frame 13 and the remote controller are connected with signal lines. It is good also as a structure connected with the included power cable. The remote controller is provided with a control unit, a power supply unit, and an operation unit. Note that at least one of the control unit, the power supply unit, and the operation unit may be provided separately from the spectacle frame. In the voltage application type variable focus glasses described above, the drive unit may be provided in the remote controller.

  In the ninth embodiment, the control unit 25 is provided in the spectacle frame 13, but the control unit 25 may be provided in the remote controller 87.

  The ninth embodiment is a modification of the liquid variable focus lens. However, the same configuration is applied to the voltage application variable focus glasses described above, and the control generated between the spectacle frame and the operation unit is applied. May be wirelessly communicated. Note that the control unit may be provided in the remote controller. Moreover, you may provide a drive part in a remote controller.

  Further, the voltage application type variable focus glasses described above may be variable focus glasses that change the focal length by applying a voltage, and are not limited to the liquid crystal type variable focus glasses described above. For example, a conductive film and an insulating fluid are sealed with a predetermined flexible film in a lens holder (container), an applied voltage is applied to the conductive liquid, the interface is changed, and the focal length is set. Variable focus glasses (Netherlands: Philips Electronics) to be changed, and electronic glasses (France: Varioptic) using lenses utilizing the principle of the electronic wetting phenomenon may be used. Moreover, the variable focus spectacles which apply external force to a lens by applying an applied voltage, change a lens thickness, and change a focal distance may be sufficient.

  Further, in the operation procedure after the three-point teaching in the first embodiment and the second embodiment, the order of changing the drive amount by operating the touch sensor can be changed as appropriate.

  The present invention is not limited to the above-described embodiments, and can be freely modified within the technical idea described in the scope of claims.

DESCRIPTION OF SYMBOLS 11 ... Variable focus spectacles 13 ... Glasses frame 15, 15R, 15L ... Variable focus lens 17 ... Front 19, 19R, 19L ... Temple 21 ... Transparent liquid 23, 23R, 23L ... Drive part 25 ... Control part 27 ... Power supply part 31 ... Piston 33 ... Feed screw shaft 35, 35R, 35L ... Stepping motor 37 ... Storage chamber 39 ... Rotary encoder 41 ... (missing number)
43 ... (missing number)
47 ... Operation unit 49 ... Power switch 51 ... Touch sensor 53 ... Teaching button 55 ... Mode switching button 57 ... Touch sensor 59 ... Registration button

Claims (10)

In variable focus glasses having a pair of left and right variable focus lenses capable of changing the focal length;
A drive unit that is provided for each variable focus lens and changes a focal length of the variable focus lens;
A switch for performing an operation of driving the driving unit ;
A control unit that controls the driving unit in response to an operation of the switch ;
With
It has a function of storing a predetermined drive amount of the drive unit in advance for each of the drive units when the user of the variable focus glasses can clearly see a visual object at a predetermined distance. ,
When the user performs a predetermined operation for reproducing the predetermined drive amount stored in advance on the switch , the control is performed so as to reproduce the predetermined drive amount stored in advance. The variable focus glasses characterized in that the unit individually controls the drive unit.   When the user performs a predetermined operation for reproducing the predetermined driving amount stored in advance, the driving amount of the driving unit is designated in advance for each driving unit specified by the operation of the switch. The variable focus glasses according to claim 1, wherein the control unit individually controls the drive unit so that the predetermined drive amount stored in the control unit is obtained. 3. The variable focus according to claim 1 , wherein the predetermined drive amount when the object to be viewed at the predetermined distance can be clearly recognized is the drive amount taught by the user. glasses. The variable focus lens is a variable focus lens capable of changing a focal length by taking in and out a liquid,
Wherein the drive unit is variable focus spectacles of any one of claims 1 to 3, characterized in that in and out the liquid which is a drive unit for changing the focal length of the variable focus lens.   The drive unit includes a drive source and a movable unit that is movable when the drive source is driven,
  The variable-focus glasses according to claim 4, wherein the moving amount of the movable part is the driving amount. An internal space in which the liquid is taken in and out is formed in the variable focus lens,
The drive unit;
A piston that is provided in an inner diameter portion connected to the internal space and moves to change the focal length of the variable focus lens by moving the liquid in and out;
One of the stepping motor, servo motor, and DC motor that can be controlled to the drive amount when the visual target at a predetermined distance can be clearly seen;
With
5. The variable focus glasses according to claim 4 , wherein the control unit moves the piston by individually driving the motor. The variable focus lens is a variable focus lens capable of changing a focal length by increasing or decreasing an applied voltage,
Variable focus spectacles according to the drive unit, any one of claims 1 to 3, characterized in that by increasing or decreasing the applied voltage is a driving unit for changing the focal length of the variable focus lens.   The variable focus glasses include a switch for performing an operation of gradually changing the focal length of the variable focus lens,
  A function for calculating a driving amount for the driving unit that can clearly see a visual target at a predetermined distance when the focal length of the variable focus lens is gradually changed from the predetermined driving amount stored in advance. Have
  The controller controls the drive unit so that the drive amount of the drive unit becomes the calculated drive amount when the switch is operated to gradually change the focal length of the variable focus lens. The variable focus glasses according to any one of claims 1 to 7, wherein: Among the drive unit, the operation unit that operates the drive unit, the control unit, the drive unit, and a power supply unit that supplies power to the control unit, at least the operation unit includes a spectacle frame that holds the variable focus lens; variable focus spectacles of any one of claims 1 to 8, characterized in that provided in the remote controller which is provided separately. Any one of the variable focus glasses according to any one of claims 1 to 9 , a distance measuring unit that measures a distance to the visual target object, and a visual object detection unit that detects the presence or absence of the visual target object. Variable focus glasses characterized by comprising.