JPS62157007A - Glasses - Google Patents

Abstract

PURPOSE:To prevent surely a user from forgetting to turn off a power source when he does not use glasses, by forming contact sensors in nose contacting parts formed on lens frames and turning on the power source automatically when the user puts on glasses. CONSTITUTION:Nose pad parts 6 and 6 corresponding to nose contacting parts are provided on lens frames 3 and 3, and contact sensors 7 and 7 are provided in parts, with which the nose part of the user is brought into contact, of nose pad parts 6 and 6. Electric signal processing means 8 are buried in temples 5 and include means which change focal lengths of variable focus liquid crystal lenses constituting lens parts. When the contact sensor 7 is brought into contact with the nose part of the user, the contact sensor 7 sends out a detection signal to a power source control means 9, and the power of a power source part 10 is supplied to the electric signal processing means 8 to drive this means 8. Thus, the power source is turned on automatically when the user puts on glasses, and unnecessary consumption of a battery is prevented because the user is prevented from forgetting to turn off the power source.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an energizing switch used in eyeglasses, and particularly in liquid crystal glasses and sunglasses comprising an element exhibiting EC (electrochromism). This relates to an energization switch that automatically turns on the power when it is attached.

[Conventional technology]

When the crystalline lens of the eyeball is removed due to an eye disease such as a cataract, conventional mirrors that use lenses with a fixed focal length can be used with focal lengths, 1. It is necessary to prepare several types of glasses with different χ distances and use them depending on the situation, which is a great inconvenience in real life. Therefore, it has been desired to develop a V&mirror lens that can freely change the focal and α distances. Further, the focal length of a variable focal length lens called a zoom lens used in an optical lens is controlled by varying the distance between lens groups made up of a plurality of single lenses. Therefore, a lens movable mechanism is essential to move the lens group, making it more compact and
Unable to fully satisfy the demand for low cost, we developed a focal length lens that allows the focal length and α distance to be changed freely without moving the lens.
It was hoped that a variable distance lens with y and ff11 would appear.

Liquid crystals generally have a thin rod-like molecular structure with a length of several tens of amps and a width of about a few amps (1), and also have yJ dielectric anisotropy, with a dielectric constant parallel to the axial direction of the liquid crystal molecules and a dielectric constant perpendicular to the axial direction of the liquid crystal molecules. generally do not match. A liquid crystal in which the former is larger than the latter is called a positive liquid crystal, and the opposite is called a negative liquid crystal.

When a field-effect liquid crystal with positive dielectric anisotropy is placed between two transparent electrode substrates and an AC voltage above a threshold is applied to the liquid crystal cell, in which the liquid crystal molecules are easily aligned so that they are parallel to the substrates,
The force acting on the dipole moment of the liquid crystal molecules causes the liquid crystal molecules to change the direction of the liquid crystal molecular axis in the direction of voltage application. Therefore, depending on the magnitude of the applied voltage, the orientation of the liquid crystal molecules, which were oriented parallel to the substrate, can be continuously changed in a direction perpendicular to the substrate. Therefore, the apparent refractive index of the liquid crystal cell for incident light polarized in the orientation direction of the liquid crystal molecules changes continuously from a value for extraordinary light to a value for ordinary light.

This so-called electric field-controlled birefringence effect is determined by the relative relationship between electrical energy and elastic energy, so
It is known that it does not depend on the thickness of the liquid crystal cell and changes depending on the applied voltage rather than the applied electric field. In other words,
The liquid crystal cell is shaped like a lens, and the I of the liquid crystal cell is
If the '7' differs from place to place, optically uniform changes in the refractive index can be obtained. That is,
Eleven liquid crystals with positive dielectric anisotropy are placed between lens-shaped substrates with liquid crystal molecules oriented in appropriate directions, and the direction of orientation of the liquid crystal molecules is controlled by applied voltage to create an apparent liquid crystal cell. By changing the refractive index, the focus of the liquid crystal lens can be adjusted.
α distance from the value Fe for extraordinary light to the value Fo for ordinary light
It can be changed continuously up to. When a vertically aligned liquid crystal with negative dielectric anisotropy is used, the change in focal length with respect to the applied voltage is reversed. Since the alignment state of liquid crystal molecules can be changed by applying a magnetic field instead of applying a voltage, it is also possible to create a variable focal length lens using a magnetic field.

There are also sunglasses that use liquid crystals or EC elements, but these use elements in the lens portion that change color or light transmittance upon application of an external voltage. Here, the electrochromism (EC) phenomenon is a phenomenon in which color or light transmittance changes reversibly due to oxidation/reduction reactions that occur at or near the electrode surface when a voltage is applied to a substance. It is. Examples of materials that significantly exhibit this phenomenon include biolodenate, tungsten oxide, and the like.

In particular, by using a material in which tungsten trioxide (WO'+) is mixed with molybdenum trioxide (MOOz) or vanadium pentoxide (V20q), elements exhibiting various colors can be provided. Furthermore, if an element is used in which a material that colors and a material that decolors when a voltage is applied is used, the color can be changed continuously. Furthermore, if colored glass or the like is used, the color of the entire lens portion can be changed.

[Problem that the invention seeks to solve, α]

However, in the case of a liquid crystal lens before adjustment, almost no current flows through the liquid crystal itself, but an applied voltage of approximately 10 V is required to change the focal length of the liquid crystal lens, so battery space and weight are reduced. It is desirable to adopt a booster circuit due to the following relationship. Since this booster circuit has relatively large power consumption, it is necessary to prevent unnecessary power consumption by preventing forgetting to turn off the power switch. Furthermore, in an EC element, since a certain amount of current flows through the element during operation, it is extremely important to prevent wasteful power consumption.

It is conceivable to install this power switch on the temple of the glasses body, but it is unavoidable to forget to turn it off when not in use, and it is also possible to provide the power switch in conjunction with the folding operation of the temple, but if the temple is unfolded. There was a problem that the power could not be turned off if it was placed on a desk.

[Means for solving problems]

The present invention has been devised in view of the above-mentioned problems, and provides eyeglasses comprising left and right lens frames connected at the center and temples connected to both ends of the lens frames. This is characterized in that a contact sensor is formed in the contact portion of the /-z.

[Effect]

The present invention is an energizing switch that utilizes the fact that when a wearer puts on glasses, the contact part of the eyeglass body contacts the Q part of the user, and contacts the contact part of the /- part. form a sensor, and when the sensor comes into contact with the user's nose, 6fi
Note: The electrical signal processing means formed in the main body is electrically connected to the power source, and the electrical signal processing means is activated.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained based on the drawings.
Reference numeral 1 denotes a main body of glasses, which consists of a liquid crystal lens section 2.2, lens frames 3, 3, a central connecting piece 4, and temples 5, 5. The liquid crystal lens portion 2.degree. 2 is composed of a variable focus liquid crystal lens, but in the case of sunglasses, it may be a guest host liquid crystal or an element exhibiting EC (electrochromism). The lens frames 3, 3 are provided with nose pad portions 6, 6 corresponding to the 7-zu contact portions, respectively. A contact sensor 7.7 is provided. The contact sensor 7.7 may be constituted by a pressure-sensitive element such as a pressure-sensitive transistor or a piezoresistive type, or may be a pressure sensor or a pressure-sensitive sensor. That is, any device that can detect contact with the user's nose is sufficient. Inside Temple 5, there is an X
T,'; (A signal processing means 8 is embedded, and includes means for changing the focus and distance of the variable focus liquid crystal lens formed by the lens portion k(!).In the case of sunglasses, The electric signal processing means 8 has built-in means for changing the color or light transmittance of the lens portions 2.2.The electric signal processing means 8 has a built-in function that not only controls the liquid crystal lens portions 2. , a hearing aid 2t, a lantern, etc.Also, in this embodiment, the electrical signal processing means 8 is embedded in the temple 5, but it is not limited to the temple 5, but may be located anywhere on the glasses body 1. Good too.

When a user wears the glasses, the contact sensor 7 provided on the nose pad 6 comes into contact with the user's nose, the contact sensor 7 sends out a detection signal, and the power control means 9
Output to. When the power supply control means 9 receives the detection signal from the contact sensor, the power of the power supply section 10 is transferred to the electric signal processing means 8.
and drives the electric signal processing means 8. Note that at least one of the two contact sensors 7.7 may be configured to drive the electrical signal processing means when it comes into contact with the user's nose, and one of the two 7-pan F sections 6. The contact sensor 7 may be provided only on the butt portion 6 of the 7'. Furthermore, the power may be turned off after a certain period of time after the user's nose moves away from the contact sensor 7. In addition, it is desirable that the Hondori mis-in unit consisting of the contact sensor 7 and the Sit source control means 9 have a function not only for turning on the power but also as an external pressure and stabilizing power source. Further, the power supply section 10 may be a primary battery such as a lithium battery, a secondary battery such as a di-quad battery, or a solar battery. It is desirable that the Iffff rod body 1 can be stored at any location within the rod body 1.

In this embodiment configured as described above, the user can
When the liquid crystal lens is attached, the Si source is automatically turned on and the applied voltage variable means of the variable one-party liquid crystal lens is driven. If the power is turned off after a certain period of time after the user's nose separates from the contact sensor 7, the applied voltage variable means will be continuously driven even if the user's nose leaves the contact sensor 7 for a moment during exercise such as sports. can be done. Furthermore, in this embodiment, since there is no need to forget to turn off the power, the battery is not wasted.

It goes without saying that the present invention can be applied not only to variable focus liquid crystal lenses and sunglasses, but also to electronic bifocal glasses, supplementary glasses, eyeglasses with lanterns, glasses with wireless communication (3FI), and the like.

〔effect〕

In the present invention configured as described above, a contact sensor is formed in the contact portion of the lens frame r&, and when the S portion of the user comes into contact with the sensor, the electric signal processing means is activated. Since it is electrically connected to the power supply, the power is automatically turned on when the user puts on the glasses.

Therefore, forgetting to turn off the power when not in use can be completely prevented. Further, since there is no mechanical switch, there is an effect that it is possible to provide an extremely reliable energizing switch for eyeglasses without causing contact failure or the like.

Furthermore, the power switch etc. are not exposed from the glasses body, so
This has the advantage of not detracting from the beauty of the glasses themselves.

[Brief explanation of drawings]

The figures are diagrams showing an embodiment of the present invention, and FIG. 1 is a perspective view;
Figure f52 is a block diagram showing the configuration.

Claims (4)

[Claims] (1) Eyeglasses consisting of left and right lens frames connected at the center and temples connected to both ends of the lens frames, in which a contact sensor is formed on the nose contact portion formed on the lens frames. Glasses characterized by: (2) The glasses according to claim 1, wherein the electrical signal processing means is electrically connected to the power supply section when the contact sensor formed on the nose contact section contacts the user's nose. (3) The glasses according to claim 2, wherein the electrical signal processing means is applied voltage variable means for changing the focal length of the variable focus liquid crystal lens. (4) The glasses according to claim 2, wherein the electrical signal processing means is an applied voltage variable means for sunglasses having an element whose color or light transmittance changes upon application of an external voltage.