JP2011232550A - Spectacles and power feeder of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power feeding structure of spectacles that does not require a time and labor for battery exchange, eliminates the need of a dedicated replacement battery, and free from possible electrode corrosion.SOLUTION: A power feeding structure 10 comprises a liquid crystal shutter 50, spectacles 30 having a drive mechanism of the liquid crystal shutter 50, and a cradle (power feeder) 12. A primary coil 20 for power transmission is arranged inside the cradle 12. Meanwhile, the spectacles 30 comprise: a secondary battery 74 which supplies power to the liquid crystal drive mechanism; a secondary coil 60 for power reception which causes electromagnetic induction with the primary coil 20; a rectification unit 70 which rectifies an AC voltage generated in the secondary coil 60 to a DC voltage; and a control unit 72 which controls the DC voltage obtained as a result of rectification and supplies it to the secondary battery 74. By exploiting the electromagnetic induction, it is possible to charge the secondary battery 74 only by mounting the spectacles 30 on the cradle 12, without requiring battery replacement or a dedicated battery. In addition, the spectacles 30 are free from possible corrosion on the electrodes because they do not come into contact with a user.

Description

  The present invention relates to glasses including a liquid crystal driving mechanism such as 3D glasses and a power feeder thereof.

  There are various methods for displaying images in three dimensions, and one of them is a method for actively switching glasses images. As the active method, specifically, 3D glasses using a liquid crystal driving device for the glasses body are known. Generally, on the television screen or movie screen, images for the left and right eyes are switched and displayed or projected at high speed, and at the same time, a synchronization signal is transmitted by infrared rays or radio waves. The 3D glasses side receives the synchronization signal, drives the liquid crystals of the left and right lenses based on the received signal, and switches the left and right lenses at high speed. As a result, a stereoscopic image can be seen by making the right eye visible when the right-eye image is displayed and allowing the left eye to be visible when the left-eye image is displayed. Such 3D glasses require a power source for driving the liquid crystal. Conventionally, a primary battery or the like has been used as a power source.

  For example, Patent Document 1 listed below discloses a power supply device in stereoscopic shutter glasses in which shutters for right and left eyes are opened and closed in synchronization with time-division switching between right and left eye screens. Has been disclosed to be integrated with the glasses. The power supply device is attached to the head hand so as to be integrated with the glasses. Patent Document 2 below discloses an electronic spectacle that includes a battery for driving electronic spectacles in the interior of the modern, and that allows the modern to be attached to and detached from the temple so that the power supply can be exchanged.

Japanese Utility Model Publication No. 64-19915 JP 2009-237450 A

  However, the background art as described above has the following disadvantages. First, in the technology described in Patent Document 1, it is considered that a primary battery is used as a power supply device. However, while watching a 3D image, the battery runs out and the viewing of the image is interrupted, or the battery is replaced. It takes time to do. Further, since the headband is used while being attached to the head, there is a possibility that sweat permeates into the power supply device from the gap and corrodes the electrode portion. Also in the technique described in Patent Document 2, battery replacement is necessary, and in that case, there is a disadvantage that a modern part with a built-in battery, that is, a modern dedicated battery is required.

  The present invention pays attention to the above points, and it is not necessary to replace the battery or prepare a dedicated battery for replacement, and the glasses equipped with the liquid crystal driving mechanism that does not cause the corrosion of the electrode part and its glasses The object is to provide a power feeder. Another object is to provide a power feeder that can charge a plurality of glasses simultaneously.

  The present invention is a glasses having a liquid crystal shutter and a driving mechanism thereof, a secondary battery for supplying power to the driving mechanism, a secondary coil provided in the glasses and receiving power by electromagnetic induction, And a charging circuit for charging the secondary battery based on electric power obtained by the secondary coil.

One of the main forms is characterized in that the secondary battery is provided on the rear side with the ear as a fulcrum when the user wears the glasses. One of the other forms is characterized in that the secondary coil is formed inside any part of the frame of the glasses. Alternatively, the secondary coil is formed of a transparent electrode with respect to the liquid crystal shutter. According to still another embodiment, a magnetic body is disposed in the vicinity of the secondary coil.
One of the other forms is provided in the charging circuit, and a charging state detection unit that detects a charging state of the secondary battery, a display unit that displays a result detected by the charging state detection unit, It is provided with. The charging state detecting means detects at least one of a remaining amount of power in the secondary battery, that charging is necessary, and that charging is completed.

  Another invention is a power feeder for supplying power to any one of the glasses, wherein at least one of the glasses can be placed or stored, and a primary coil for power transmission is provided therein. Features. One of the main forms is characterized in that a magnetic material is disposed in the vicinity of the primary coil. One of the other forms is characterized in that positioning means is provided for positioning so that the positions of the primary coil and the secondary coil of the glasses correspond to each other. One of the other forms is a box shape capable of storing a large number of glasses, and is characterized in that a large number of primary coils are provided inside at least one of the bottom and side surfaces thereof. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

  According to the present invention, in a power feeding structure that supplies power to the glasses having the liquid crystal shutter and its driving mechanism, the primary coil for power transmission is provided inside the power feeder, and power is supplied to the driving mechanism on the glasses side. A secondary battery for receiving power that performs electromagnetic induction between the secondary battery and the primary coil, and a charging circuit that charges the secondary battery are provided. This makes it possible to charge the secondary battery using electromagnetic induction by placing or storing the glasses on the power feeder, eliminating the need for battery replacement or a dedicated battery, and further supplying power without contact. Thus, the effect of preventing electrode corrosion can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Example 1 of this invention, (A) is a figure which shows the whole structure, (B) is sectional drawing which cut | disconnected said (A) along the # A- # A line | wire and looked at the arrow direction, (C) is a cross-sectional view showing a main part of a modification. 2 is a block diagram of a charging circuit according to the first embodiment. It is a figure which shows Example 2 of this invention, (A) is a figure which shows the whole structure, (B) is sectional drawing which cut | disconnected said (A) along the # B- # B line | wire and looked at the arrow direction. is there. It is a figure which shows the said Example 2, (A) is sectional drawing which cut | disconnected FIG. 3 (A) along the # C- # C line | wire and looked at the arrow direction, (B) is a part of said (A). FIG. It is a figure which shows the modification of the said Example 2, (A) is a figure which shows whole structure, (B) is sectional drawing which cut | disconnected said (A) along the # D- # D line | wire and looked at the arrow direction It is. 4A and 4B are diagrams showing Embodiment 3 of the present invention, in which FIG. 5A is a diagram showing an overall configuration, FIG. 5B is an external perspective view showing glasses, and FIG. 5C is a perspective view showing an application example. It is a figure which shows Example 4 of this invention. It is a figure which shows the whole structure of Example 5 and its modification of this invention. It is a circuit block diagram which shows the principal part of Example 6 of this invention.

  Hereinafter, the form for implementing this invention is demonstrated in detail based on an Example.

  First, Embodiment 1 of the present invention will be described with reference to FIGS. 1A is a diagram showing the overall configuration of this embodiment, FIG. 1B is a cross-sectional view taken along line # A- # A and viewed in the direction of the arrow, and FIG. C) is a cross-sectional view showing a main part of a modified example. The arrows in FIGS. 1B and 1C indicate magnetic flux. FIG. 2 is a circuit block diagram of the present embodiment. The present embodiment is an example in which the present invention is applied to power supply for spectacles for viewing 3D video in an active manner. As shown in FIGS. 1 (A) and 1 (B), a power feeding structure 10 according to the present embodiment includes glasses 30 for viewing a stereoscopic image provided with a liquid crystal shutter 50 and its driving mechanism (not shown), and its power feeder. It is comprised by the cradle 12 which is.

  In the illustrated example, the cradle 12 has a substantially rectangular shape, and a lens mounting portion 16 having a shape and size capable of mounting one spectacle 30 is formed in a concave shape inside the edges 14A to 14D. ing. In addition, a convex portion 18 for positioning the liquid crystal shutter 50 so as not to shift is provided on a part of a substantially central portion of the lens placement portion 16 continuously to the edge portion 14C. Inside the cradle 12, an AC magnetic field or a primary coil 20 for power transmission that generates an AC magnetic field is formed by, for example, a coated conductor and is sealed so as not to be exposed to the outside. An AC power supply 24 shown in FIG. 2 is connected to the primary coil 20 via a cord 22.

  The spectacles 30 are configured by a pair of liquid crystal shutters 50 corresponding to the left and right eyes and a frame 32 that supports the pair of liquid crystal shutters. In the illustrated example, the frame 32 includes a pair of rims 34 that support the liquid crystal shutter 50, a bridge 36 that connects the left and right rims 34, an edge 35 and a hinge 40 that connect the rim 34 and a temple 38, It is provided at the tip of the temple 38 and is constituted by a modern 42 that covers the ear of the wearer. In this embodiment, the temple 38 can be folded by the hinge 40.

  On the other hand, as shown in FIG. 2, the charging circuit for the glasses 30 includes a secondary coil 60, a rectifier 70, a constant voltage controller 72, and a secondary battery (load) 74. The secondary coil 60, the rectifying unit 70, the constant voltage control unit 72, and the secondary battery 74 are housed inside the glasses 30 so as not to be exposed on the surface. The secondary coil 60 performs electromagnetic induction with the primary coil 20, and rectifies the alternating voltage generated in the secondary coil 60 into direct current by the rectifying unit 70. The constant voltage control unit 72 controls the voltage of the rectified DC voltage to charge the secondary battery 74. Further, the constant voltage control unit 72 is provided with a remaining amount detection unit 76 for detecting the remaining battery level of the secondary battery 74, and the remaining amount detection unit 76 is arranged at an arbitrary position of the glasses 30. The remaining battery amount is displayed on the remaining amount display section 78 provided in the. In the illustrated example, the remaining amount display portion 78 is provided at the upper left corner of the liquid crystal shutter 50 for the left eye. The rectifying unit 70, the constant voltage control unit 72, and the secondary battery 74 can be provided at any position of the frame 32. However, since the secondary battery 74 is particularly heavy, it is located behind the ear when worn. If it installs in the position which becomes, ie, modern 42, a stable wearing feeling will be acquired and it will be convenient. Note that whether the two secondary coils 60 are connected in series or in parallel to the rectifying unit 70 may be appropriately determined according to the individual electromotive force or current value of the secondary coil 60.

  By the way, the arrangement of the primary coil 20 and the secondary coil 60 is important because the charging efficiency varies greatly depending on the relative positional relationship. In this embodiment, as shown in FIGS. 1A and 1B, the secondary coil 60 is formed in a spiral shape with a coated conductor along the outer periphery of the liquid crystal shutter 50 in the rim 34 of the glasses 30. . On the cradle 12 side, the primary coil 20 is built in a position facing the secondary coil 60 when the eyeglasses 30 are placed on the lens placement portion 16. In the example of FIG. 1B, the primary coil 20 is formed so as to pass through the inside of the edge portion 14 </ b> A and the convex portion 18. Similarly, the primary coil 20 is also formed inside the edge portion 14 </ b> B and the convex portion 18. In the modification shown in FIG. 1C, the primary coil 20 provided in the cradle 12A is spirally located near the surface 16A of the lens placement portion 16 and at a position corresponding to the secondary coil 60. Is formed. The primary coil 20 and the secondary coil 60 described above are efficiently charged because the left and right liquid crystal shutters 50 of the glasses 30 placed on the lens placement portion 16 are fixed in position by the convex portion 18. Can do.

  Next, the operation of this embodiment will be described. First, the cord 22 of the cradle 12 is connected to an AC power source 24, an AC current is passed through the primary coil 20, and an AC magnetic field is generated around it. Then, the glasses 30 are placed on the lens placement portion 16 of the cradle 12 so that the liquid crystal shutter 50 faces downward. Then, since the primary coil 20 and the secondary coil 60 of the spectacles 30 face each other, the alternating magnetic flux generated around the primary coil 20 passes through the secondary coil 60 on the spectacles 30 side. An AC voltage is generated in the secondary coil 60 by the action of known electromagnetic induction. The AC voltage is rectified by the rectifier 70 and the voltage is controlled by the constant voltage controller 72 to charge the secondary battery 74.

  When the user wears the glasses 30 that have been charged and receives a signal for driving the liquid crystal shutter 50 of the glasses 30 from a transmitter (not shown) provided in a movie theater or the like, the liquid crystal drive mechanism (not shown) The liquid crystal shutter 50 is driven. Then, in synchronization with the switching of the left-eye and right-eye playback images, the liquid crystal shutter 50 is driven to switch left and right, and the user can view a stereoscopic image. During the operation of the glasses 30, power is supplied from the secondary battery 74 to the liquid crystal drive mechanism, and the remaining power is displayed on the remaining amount display unit 78. The display form may be an appropriate form such as a graphic or symbol display such as an expansion / contraction of a bar, or a character / number display. If the remaining battery level is low after viewing the video, the glasses 30 are placed on the cradle 12 and charged.

Thus, according to the first embodiment, there are the following effects.
(1) Since the secondary battery 74 provided on the glasses 30 is charged by using electromagnetic induction by the primary coil 20 provided on the cradle 12 side and the secondary coil 60 provided on the glasses 30 side, the battery The glasses 30 can be charged without requiring replacement or a dedicated battery. In addition, since the secondary battery 74 can be used from the charged state, it is possible to reduce battery exhaustion during use.
(2) Since there is no contact electrode part, there is no risk of electrode corrosion due to user perspiration.
(3) Since the secondary battery 74 is provided in the modern 42 portion of the frame 32 of the spectacles 30, the spectacles 30 do not shift forward due to the weight of the secondary battery 74 at the time of mounting, and stability when mounted A feeling increases.
(4) The primary coil 20 is sealed inside the cradle 12, and the secondary coil 60, the rectifier 70, the constant voltage controller 72, and the secondary battery 74 are sealed inside the glasses 30. There is no risk of electrode corrosion.

(5) A spiral secondary coil 60 is provided inside the left and right rims 34 of the glasses 30 along the outer periphery of the liquid crystal shutter 50, and the spiral primary coil is placed on the cradle 12 at a position facing the secondary coil 60. By providing 20, it becomes possible to receive a magnetic flux in a wide area, it can charge efficiently and in a short time, and is convenient.
(6) Since the result detected by the remaining amount detection unit 76 is displayed on the remaining amount display unit 78 provided on the glasses 30, the remaining battery level can be easily grasped, the timing of charging, and other charged It is possible to appropriately grasp the timing of replacement with the glasses 30.
(7) Since the battery can be charged simply by placing the glasses 30 on the cradle 12, the charging work does not take time. Further, since the convex portion 18 for preventing misalignment is provided on the cradle 12 side, charging by electromagnetic induction can be performed efficiently and in a short time.

  Next, Embodiment 2 of the present invention will be described with reference to FIGS. In addition, the same code | symbol shall be used for the component which is the same as that of Example 1 mentioned above, or respond | corresponds (it is the same also about a following example). FIG. 3A is a diagram showing the overall configuration of the present embodiment, and FIG. 3B is a cross-sectional view of (A) taken along line # B- # B and viewed in the direction of the arrow. 4A is a cross-sectional view of FIG. 3A taken along line # C- # C and viewed in the direction of the arrow, and FIG. 4B is a partially enlarged view of FIG. 4A. FIG. FIG. 5A is a diagram showing the overall configuration of a modification of the present embodiment, and FIG. 5B is a cross-sectional view taken along the line # D- # D and viewed in the direction of the arrow. . The first embodiment described above is an example in which the secondary coil is formed by the coated conductor on the inner side of the frame 32 of the spectacles 30. However, in this embodiment, the secondary coil is formed on the liquid crystal shutter 50 of the spectacles 30. It has become. As shown in FIGS. 3 (A) and 3 (B), the power feeding structure 80 of this embodiment includes a cradle 12B and glasses 30A. The cradle 12B has the same configuration as that of the cradle 12 of the first embodiment except that the primary coil 20 is spirally formed on almost the entire surface near the lens placement surface 16A. Alternatively, if necessary, a magnetic body 26 may be disposed in the vicinity of the primary coil 20 of the cradle 12B to reduce the magnetic resistance and facilitate the passage of the magnetic flux.

  On the other hand, in the eyeglasses 30A, the secondary coil 60 is formed by a spiral coil pattern made of a transparent electrode material on almost the entire surface of the liquid crystal shutter 50 (the side not in contact with the eyes). FIG. 4B shows an example of the laminated structure of the liquid crystal shutter 50. In the illustrated example, the liquid crystal shutter 50 is provided with alignment films 54A and 54B on both surfaces of the liquid crystal 52. The alignment films 54A and 54B have transparent electrodes 56A and 56B and glass substrates 58A and 58B, respectively. They are stacked in order. Then, the secondary coil 60 is formed in a spiral shape on one glass substrate 58A using a transparent electrode material such as indium tin oxide, tin oxide, or zinc oxide. Polarizing filters 62A and 62B are provided on the secondary coil 60 and the glass substrate 58B. For this reason, the secondary coil 60 is not exposed to the surface of the liquid crystal shutter 50. The illustrated structure of the liquid crystal shutter 50 is an example, and the internal structure of the liquid crystal shutter is not limited to the illustrated example, and various known liquid crystal panel structures are applicable.

  According to the present embodiment, the secondary coil 60 is provided on almost the entire surface side of the liquid crystal shutter 50, and the primary coil 20 is provided on almost the entire surface in the vicinity of the lens mounting portion surface 16A of the cradle 12B. Compared with the configuration of the first embodiment, the magnetic flux can be received in a wider area, and the charging efficiency can be improved. Other effects are the same as in the first embodiment. When the magnetic body 26 is disposed in the vicinity of the primary coil 20, further efficiency improvement is expected. In the example shown in FIGS. 3 and 4, the secondary coil 60 is provided on almost the entire surface of the liquid crystal shutter 50. However, as in the power supply structure 80A of the modification shown in FIGS. 5 (A) and 5 (B). The secondary coil 60 is formed by a spiral coil pattern made of a transparent electrode material only at the portion near the outer periphery of the liquid crystal shutter 50 of the glasses 30B, and only on the cradle 12C side at a position corresponding to the secondary coil 60. The primary coil 20 may be formed. Also in this example, the magnetic body 26 may be disposed near the primary coil 60 as necessary.

  Next, Embodiment 3 of the present invention will be described with reference to FIG. 6A is a diagram showing the overall configuration of this embodiment, FIG. 6B is an external perspective view showing glasses, and FIG. 6C is a perspective view showing an application example. The power supply structure 90 of the present embodiment includes a power supply pad 92 and glasses 30C. As shown in FIG. 6B, the eyeglass 30C incorporates a secondary coil 60A in the front upper portion (the upper portion of the rim 34 and the bridge 36) of the frame 32 by a covered conductor or the like, and a pair of temples 38 of the frame 32. In addition, except for the structure in which the other secondary coils 60B and 60C are incorporated, the configuration is the same as that of the glasses 30 of the first embodiment described above. In addition, you may make it provide the magnetic body cores 26A-26C inside the said secondary coils 60A-60C as needed. On the other hand, as shown in FIG. 6C, the power supply pad 92 is formed with a large number of primary coils 94 on a flexible substrate 92A, and the primary coils 94 are covered with an appropriate cover 96 for protection. It has become the composition. Such a power supply pad 92 is connected to an AC power source (not shown) by a cord 98.

  In the embodiment of FIG. 6 (A), no positioning means for fixing the position of the glasses 30C is provided on the power supply pad 92 side, but a large number of primary coils 94 are provided on the entire surface of the power supply pad 92. Therefore, charging using electromagnetic induction is possible no matter where the glasses 30C are placed on the power supply pad 92. In this embodiment, since the secondary coils 60A to 60C are provided in the upper front portion of the frame 32 and inside the temple 38, the liquid crystal shutter 50 is placed so that the liquid crystal shutter 50 faces upward as shown in FIG. Then, it can charge efficiently. In the application example shown in FIG. 6C, the power supply pad 92 is formed to be large so that a plurality of glasses 30C can be charged simultaneously. The glasses 30C may be placed on the power supply pad 92 in the same state as in FIG. 6A, or may be placed with the liquid crystal shutter 50 side facing down as shown in FIG. 6C. Alternatively, charging can be performed even when the temple 38 is not folded in the state shown in FIG.

  Next, Embodiment 4 of the present invention will be described with reference to FIG. In the first and second embodiments described above, power is supplied from the cradle, and in the third embodiment, power is supplied from the power supply pad. In either case, the glasses are placed on the cradle or the power supply pad and charged. Yes. On the other hand, this embodiment is an example in which power is supplied using a power supply box that can store a large number of glasses at a time. As shown in FIG. 7, the power supply structure 100 of the present embodiment includes a large number of glasses 30, 30 </ b> A to 30 </ b> C and a power supply box 102. The spectacles 30, 30A to 30C are as described in the first to third embodiments. The power supply box 102 has a structure in which a large number of primary coils 108 are formed on the entire inner surface of the bottom surface 104 and the side surface 106, and can be connected to an AC power source via a cord (not shown). When the glasses 30, 30A to 30C are randomly stored in such a power supply box 102, the primary coil and the secondary coil are not necessarily arranged in an optimal state, and thus some charging unevenness occurs. A large number of glasses 30, 30A to 30C can be charged simultaneously. For this reason, there is an effect that the trouble of charging one by one can be saved in a place where many people use such as a movie theater.

  Next, Embodiment 5 of the present invention will be described with reference to FIG. FIG. 8A is a diagram showing the overall configuration of this embodiment, and FIG. 8B is a diagram showing a modification of this embodiment. The present embodiment is an application example of a cradle type power supply, and the glasses to be charged may be any of the glasses of Embodiments 1 to 3. However, in the illustrated example, the glasses 30 of Embodiment 1 are used as an example. Are listed. First, in the cradle 110 shown in FIG. 8A, a plurality of spectacle placement surfaces 112A to 112E are connected by a step 114, and a positioning projection 116 is provided on each of the spectacle placement surfaces 112A to 112E. It has a provided structure. Next, the cradle 120 shown in FIG. 8B has a structure in which concave lens storage portions 118A to 118E are provided on the spectacles mounting surfaces 112A to 112E of the cradle 110 shown in FIG. 8A. The projections 116 are also provided in the lens storage portions 118A to 118E. According to the present embodiment, the basic effect is the same as that of the first embodiment except that a plurality of glasses 30 can be charged simultaneously.

  Next, Embodiment 6 of the present invention will be described with reference to FIG. In the embodiment described above, as shown in FIG. 9 (A), the remaining amount detection unit 76 is provided, and the remaining battery level detected thereby is displayed on the remaining amount display unit 78. Various display modes of information regarding the battery 74 are possible.

  In the example of FIG. 9B, a voltage warning unit 200 that detects the voltage between the output terminals of the secondary battery 74 is provided in the constant voltage control unit 72 of FIG. In this example, the unit 202 is provided in the liquid crystal shutter 50 or the like. When the output voltage of the secondary battery 74 decreases due to long-term use and becomes a voltage that needs to be charged, this is detected by the voltage detection unit 200, and that fact is displayed on the charging warning display unit 202. By looking at this charging warning display, the user of the glasses 30 can know that the time for charging has come.

  The charging warning display unit 202 may be provided on the liquid crystal shutter 50 as in the above-described embodiment. For example, if the charging warning display unit 202 is formed on the modern 42 of the glasses 30 with an LED or the like, not only the user of the glasses 30 but also Others can easily know when to charge. The display form may be an appropriate form such as a graphic or symbol display such as expansion / contraction of a bar, or a display of characters / numbers. For example, if the liquid crystal shutter 50 is closed, it is very easy to understand.

  In the example of FIG. 9C, a charge amount detection unit 210 that detects the charge amount of the secondary battery 74 is provided in the constant voltage control unit 72 of FIG. 2, and a charge completion display unit 212 that displays that charging is complete is provided. In this example, the liquid crystal shutter 50 is provided. When the charging of the secondary battery 74 is completed, this is detected by the charge amount detection unit 210, and a message to that effect is displayed on the charge completion display unit 212. The display form may be an appropriate form such as a graphic or symbol display such as an expansion / contraction of a bar, or a character / number display. In particular, if the charging completion display unit 212 is provided by an LED or the like at a position where it can be seen from the outside, such as the modern 42 of the glasses 30, for example, in the charging state shown in FIGS. It is convenient to easily know which glasses are fully charged.

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) The shapes and dimensions shown in the above embodiments are examples, and may be appropriately changed as necessary. As for the material, various known materials may be used as long as the same effect can be obtained.
(2) The frame 32 shown in the above embodiment is also an example, and frames of various known shapes and structures can be used in the present invention. For example, in the above-described embodiment, the temple 38 can be bent by the hinge 40, but the present invention can also be applied to a frame having no hinge and no temple bending.
(3) The primary coil and secondary coil forming portions shown in the above-described embodiments are also examples, and the design can be changed as appropriate within the range where the same effects are obtained.
(4) The above embodiments may be combined. For example, any two or more of the display modes shown in FIGS. 9A to 9C are combined.
(5) In the second embodiment, the magnetic body 26 is provided in the vicinity of the primary coil 20, but in other embodiments, a magnetic body may be disposed in the vicinity of the primary coil as necessary. .
(6) In the above embodiment, the present invention is applied to 3D (stereoscopic) glasses. However, other known glasses that require driving power (for example, glasses for correcting amblyopia, The present invention is also applicable to electronic glasses that can be switched over a long distance.

  According to the present invention, the primary coil for power transmission is provided inside the power feeder, and electromagnetic induction is performed between the secondary coil for supplying power to the liquid crystal driving mechanism and the primary coil on the glasses side. A secondary coil for receiving power and a charging circuit for charging the secondary battery are provided. And, since the glasses are placed or housed in the power feeder and the secondary battery is charged without contact using electromagnetic induction by the primary coil and the secondary coil, no battery replacement or dedicated battery is required. Thus, the present invention can be applied to a power supply structure for eyeglasses having a liquid crystal shutter and its driving mechanism. In particular, it is suitable for power supply of active 3D ornamental glasses.

10: Power feeding structure 12, 12A, 12B, 12C: Cradle (power feeder)
14A to 14D: Edge portion 16: Lens placement portion 16A: Surface 18: Convex portion 20: Primary coil 22: Code 24: AC power supply 26: Magnetic material 26A to 26C: Magnetic material core 30, 30A, 30B, 30C: Glasses 32: Frame 34: Rim 35: Satoshi 36: Bridge 38: Temple
40: Hinge 42: Modern 50: Liquid crystal shutter 52: Liquid crystal 54A, 54B: Alignment film 56A, 56B: Transparent electrode 58A, 58B: Glass substrate 60, 60A-60C: Secondary coil 62A, 62B: Polarizing filter 70: Rectification Unit 72: Constant voltage control unit 74: Secondary battery (load)
76: Remaining amount detection unit 78: Remaining amount display unit 80, 80A: Feeding structure 90: Feeding structure 92: Feeding pad (feeder)
92A: Substrate 94: Primary coil 96: Cover 98: Cord 100: Feed structure 102: Feed box (feeder)
104: bottom surface 106: side surface 108: primary coil 110: cradle 112A to 112E: glasses mounting surface 114: step 116: projection 118A to 118E: lens storage unit 120: cradle 200: voltage detection unit 202: charging warning display unit 210 : Charge amount detection unit 212: Charging completion display unit

Claims (11)

Glasses having a liquid crystal shutter and its driving mechanism,
A secondary battery for supplying power to the drive mechanism;
A secondary coil provided inside the glasses and receiving power by electromagnetic induction;
A charging circuit for charging the secondary battery based on the electric power obtained by the secondary coil;
Glasses characterized by comprising.   The spectacles according to claim 1, wherein the secondary battery is provided on a rear side with an ear as a fulcrum when a user wears the spectacles.   3. The spectacles according to claim 1, wherein the secondary coil is formed inside any part of the frame of the spectacles.   3. The spectacles according to claim 1, wherein the secondary coil is formed of a transparent electrode with respect to the liquid crystal shutter.   The spectacles according to claim 1, wherein a magnetic body is disposed in the vicinity of the secondary coil. A charging state detecting means provided in the charging circuit for detecting a charging state of the secondary battery;
Display means for displaying a result detected by the charge state detection means;
The eyeglasses according to claim 1, comprising:   The spectacles according to claim 6, wherein the charging state detecting means detects at least one of a remaining amount of electric power in the secondary battery, that charging is necessary, and that charging is completed. A power feeder for supplying power to the glasses according to any one of claims 1 to 7,
A power supply for spectacles, wherein at least one of the spectacles can be placed or stored, and a primary coil for power transmission is provided inside.   9. The eyeglass power feeder according to claim 8, wherein a magnetic material is disposed in the vicinity of the primary coil.   The eyeglass feeder according to claim 8 or 9, further comprising positioning means for positioning the primary coil and the secondary coil of the glasses to correspond to each other.   The box-like shape capable of storing a large number of eyeglasses, wherein a large number of primary coils are provided inside at least one of a bottom surface and a side surface thereof. Glasses power supply.

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