JPS6161128A - Liquid crystal spectacles - Google Patents

Abstract

PURPOSE:To remove a trouble to store a bulky battery box in a breast pocket or the like by using a solar battery for the charge of a power supply for a liquid crystal temperature detecting means or an applied voltage control means variably controlling a voltage applied to liquid crystal. CONSTITUTION:A pair of liquid crystal spectacles 1 are constituted with a spectacle part 2 and a control part 3 for compensating the change of a focal distance due to the change of a refractive index based upon the temperature change of liquid crystal of the spectacle part 2. The spectacle part 2 is constituted with right and left lens parts 5, 4 and a frame 6. In the lens parts 5, 4, focal distance variable lenses 12a, 12b are formed by sealing liquid crystal 11a, 11b between a common transparent plate 8 and projected surface-like transparent plates 10a, 10b through spacers 9a, 9b respectively. The output of a variable voltage output circuit 21 in the control part 3 is controlled by a detecting temperature from a temperature sensor 16 and a DC power supply V for supplying electric power to the circuit 21 is formed by a solar battery and fitted to the front or the like of the lens frame part of the frame 6. Thus, a trouble to store a bulky battery box can be removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention provides a '1. I Pressure's ``1. As a god, I will put 15.1 on the liquid crystal glasses with a pond.''.

[Technical weight of the invention and the distance between i + 'rj, dj) As in presbyopia, the rays in the 11μ sphere, the throat 1 in the 6-distance nf
``Second 1: When my ability deteriorates, I try to use glasses with different focal points, one for close distances and one for far distances, but depending on the situation. It is inconvenient to have to replace the 411. My father, a single eyeglass lens (1 part) [by providing regions with different focal lengths, it can cover appropriate ranges at near and far distances (-1) But it's in focus G
It is difficult to see because the - of the work field is shaded.

When my father had his crystalline lens removed due to a disease such as cataracts, he had to wear several types of glasses with different focal distances, which caused the inconvenience of having to use one depending on the situation. One.

For this reason, as disclosed in Japanese Patent Publication No. 58-50339, the liquid crystal is turned on to control the vehicle pressure. There are some methods that can deal with this problem by using a variable focal length lens.

The conventional example is very convenient because it can be driven with low power consumption and low power consumption, but when used as eyeglasses, it requires a lot of voltage to be applied to the liquid crystal.

The power box containing the power supply must be stored in the chest pocket, which is very awkward.

Furthermore, in the above conventional example, the ambient temperature changes greatly depending on the season, and
Outdoor in K and E4 for cooling and heating. The conductivity also changes depending on the inside of r.

Therefore, due to temperature changes, the refractive index of the liquid crystal changes, causing the focal length to deviate from a preset value, resulting in the inconvenience that it becomes impossible to see clearly.

Therefore, the conventional example described above has a drawback in that it may be necessary to adjust the applied voltage by 4 degrees each time there is a change in the Y island degree of the surrounding area. In order to overcome this drawback, a power source is required that detects the temperature of the liquid crystal and adjusts the applied voltage, resulting in the same inconsistency as described above.

[Purpose of the invention]

The present invention has been developed in view of the above-mentioned problems, and uses a solar battery as a power source for the voltage applied to the liquid crystal, thereby eliminating the hassle of having to store a bulky power supply box in a breast pocket or the like. The purpose is to provide glasses.

[A chest of inventions]

The present invention uses a solar cell as the source of the voltage applied to the liquid crystal, and variably controls the voltage applied to the liquid crystal based on this battery, and adjusts the refractive index of the liquid crystal due to temperature changes to a set value as necessary. I try to maintain it.

[Embodiments of the invention]

Hereinafter, the present invention will be specifically explained with reference to the drawings.

FIGS. 1 to 4 relate to a first embodiment of the present invention.
The figure shows the configuration of the first embodiment, FIG. 2 shows the appearance of the first embodiment, FIG. 3 shows a plan view of FIG. 2, and FIG. 4 shows the voltage output from the applied Ichikawa control circuit. This figure shows how the focal length of liquid crystal glasses, which exhibits temperature dependence, is maintained at a constant value by applying an electric current.

The liquid crystal glasses 1 of the first embodiment having the appearance shown in FIG. 2 include a glasses section 2 and a control section 3 that compensates for changes in focal length due to changes in refractive index accompanying temperature changes of the liquid crystal in the glasses section 2.
It consists of

The above-mentioned glasses part 2 includes, for example, a left lens 1qlS4 and a right lens part 5 having the structure shown in FIG.
The lens parts 4 and 5 are housed and fixed in the hollow parts of the left and right lens frames, respectively, and the left and right ear hooks are rotatable at both ends of the lens frames. Part 3 is provided, for example, on the upper side of one lens.

The left lens portion 4 or the right lens portion 5 has, for example, a structure shown enlarged in FIG. 1.

A common transparent plate 8 formed of a glass plate or the like fixed to the frame 6, and spacers 9a on both sides thereof.

For example, convex transparent n & 10a, 10b with 9b interposed
Liquid crystals 11 a and '11 b of the same time are sealed between the two lenses to form variable lenses 12 a and 12 b.

In each of the lenses 12a and 12b, when no voltage is applied, the liquid crystal molecules are aligned parallel to the transparent plate 8, and the director (coinciding with the optical axis) indicating the average alignment direction of the liquid crystal is the lens 12a. and 12b are orthogonal to each other, that is, the orientation directions of the liquid crystal molecules in each lens 12a and 12hK are the direction A of the arrow 1.1' Processing such as n-mounting has been performed to ensure that each orientation direction A
, H are perpendicular to the direction of the incident light.

Both sides of the common transparent plate 80 are coated with S n 02 or the like and provided with transparent electrodes 13a and 13b, and each transparent plate 10a formed of a glass plate or the like facing the transparent plate 8
, 10b are also provided with transparent electrodes 14a and 14b.

The two outer electrodes 14a and 14b are electrically connected to each other through a lead twill or the like and are connected to a ground terminal.

Both inner cities 113a and 13b are also connected to each other.

The inner variable focal length lenses 12a and 12b having the above structure constitute a variable focal length lens that does not require the use of a polarizing plate, as described below.

The incident light can be decomposed into two mutually orthogonal polarized components, namely, the orientation direction of the arrow A in the lens 12a in FIG. 1 and the orientation direction of the arrow B in the lens 12b [FIG. 1]. First, arrow A of the lens 12a, which is one component of the incident light.
When a polarized light component parallel to the orientation direction of the light beam enters the lens 128, this light beam component becomes an extraordinary light beam for the lens 12a.

Therefore, when IICW pressure is applied to the lens 12a in this state, the liquid crystal molecules gradually change their orientation in the direction perpendicular to the polar plane in response to the heavy pressure, so that the apparent change in the lens 12a for the extraordinary ray component The refractive index changes continuously from the value for extraordinary light to the value for ordinary light, and is affected by the variable focal length.

The extraordinary light component for this lens 12aK is the lens 12b.
Since it becomes an ordinary light component, the apparent refractive index does not change and it is not affected by the effect of changing the focal length. Therefore, as it is [
Decimalize. On the other hand, the other incident light component, that is, the component corresponding to the ordinary light for the lens 12a, has no change in its apparent refractive index and is not affected by the variable focal length effect, but it becomes the ordinary light for the lens 12b. Since these components become equivalent components, the apparent refractive index changes, similar to when extraordinary light enters the lens 12a (described above), resulting in the effect of varying the focal length. Lens 12a and lens 12b
Since the same voltage is applied to each polarization component, the same effect of varying the usage point distance is exerted on each polarization component. Therefore, by focusing the two lenses, it will work as a single focal length variable lens for polarized light in any direction, and the focus will be focused regardless of the polarization direction of the incident light without using a single optical plate. There is a lens that can change the distance (;Y), and a polarizing plate can be used.
＜ 11.4 A bright lens is constructed that has high light utilization efficiency even for natural light that is not in the form of straight lines.

Is each of the above possible? r lenses 12a, 12h are liquid crystal 11a,
When llb is divided between the center t'r1'+ and the periphery, and a certain ii pressure is applied, the electric field is different between the center and the periphery, but its refractive index depends on the applied voltage. do,
It is known that the applied m field does not depend on the field.
By controlling the Ml'Ili pressure, it is generally possible to realize a lens with a refractive index of one lateral t.

The periphery Kl (K is) J of one of the above lens parts (for example 4)
--A temperature +ff sensor 16 such as a mister, a heat/direct couple, and a side resistor is attached to detect the temperature of one lens 12h.

Above, when a thermistor is used as the degree sensor 16,
The detection voltage No. 1d, which is connected in series with the reference resistor and whose resistance value changes depending on the temperature, can be taken out from the voltage gap (of course, a Wheatstone bridge structure is also possible). In addition, when the temperature sensor 16 is formed of a thermocouple, the difference signal output from the compensation cold junction (7) of the temperature detection processing section 17 corresponds to the width range.

Signal outputs corresponding to these temperatures are output from the temperature Iff detection processing unit 17, and electric signals F)', Vs corresponding to the reference temperature when the focal length is set in advance to a predetermined focal length are output.
The comparator 18 compares the completed signal voltage with the comparator 18, and the comparator 18 outputs a completed signal voltage as a comparison output. This comparison output is the deviation tVC from the predetermined temperature when the 1 point distance is set in advance.
In response to this, the island is man-powered by 1 pressure control roller 1 and 19.

The applied pressure control circuit 19 is composed of a characteristic correction circuit 20 and a variable voltage output circuit 21. The output of this variable voltage output "I-" path 21 is
Ward poles 13a and 13bvC are applied.

The above-mentioned variable "city pressure output circuit 21" outputs power from the O/AC converter 22 (or energizer) according to the control voltage level applied to its sub-side 1 end (to convert the DC of the DC power source 2 to AC). The AC output is output by varying the pressure level (amplitude).By outputting a predetermined voltage for a predetermined temperature and applying it to each liquid crystal 11a, llb, its refractive index can be controlled. so that each lens part 4.5 becomes a lens with a set focal length, and y7
A signal based on the detection signal level of the A degree sensor 16 compensates for the change in focal length due to the change in each refractive index due to the 7''11 change in each liquid crystal 11a, llb by controlling the orientation of liquid crystal molecules ( For example, if a nematic liquid crystal PCB is used as the liquid crystals 11a and 11b, the temperature depletion becomes sharp in the temperature range around room temperature, and the refractive index changes! ￥
Since vc' is made smaller tc with respect to the crystal-dependent "k" ordinary ray, the distance becomes large.This hood 18
By reducing the focal length (I) and the impact pressure to a small value, the refractive index is reduced and the focal length changes due to changes in the γ-crystal plane are suppressed. Since the above-mentioned temperature change usually varies over several 1011 times, it is easy to
A characteristic correction circuit 20 is provided in order to accurately compensate for the change in the point distance due to the + change.

For example, leakage 113''? By becoming a'! Broken 1i of Figure 4
When the prefecture/town/city distance changes as shown by iLda, the output signal of the comparator 18 can be used to compensate for this change. 114 force applied to the pressure output circuit 21; In order to fully compensate for the 7 degree change, ψ(() is required. In the first embodiment, by interposing a characteristic correction circuit 20 that compensates for this deviation by 1'
As shown by the solid line C in the figure, the influence of temperature changes can be compensated for (or eliminated).

When the first embodiment constructed in this way was used in an environment where the surrounding temperature 1 changes, the refractive index of the liquid crystal forming each lens portion 4°5 is as follows. Even if the temperature changes, the temperature is detected by the temperature sensor 16, and the applied pressure control circuit 19 is controlled based on this detection signal, and the applied voltage is automatically changed to F1 to eliminate the focal length change due to the temperature change. Be controlled.

Therefore, those who use the first example for one insect, the degree of manufacture is 6.
Even when the 1M node function is degraded, it is possible to eliminate the problem of inability to focus due to temperature changes.

FIG. 5 shows a second embodiment of the invention. In this example, a pair of variable focal length lenses 32a and 32h in left and right lens sections 31K (only one is shown in the figure) are formed using plano-convex lenses 33a and 33h.

In other words, point 4 in FIG. 1 is the Kosaki variable lens 12a.
, 12h, the transparent plates 10a, 10b are plano-convex lenses 33a, 33+), and the liquid crystal 34''+
34 b is housed in a parallel plate, and the refractive index is
) is changed to 61, the liquid crystals 34a, 34b and the biconvex lens 33
R! 33h and the attack point distance i [variable lens 32a,
31l-2b is formed.

The rest of the structure is the same as that of the first embodiment described in Section 2, and its operation and effect are similar to that of Rima.

According to this embodiment, even if the convex lens-shaped liquid crystal 11a, 1"lb in the first embodiment is not only voltage dependent,
In cases where the liquid crystal 34 shows electric field dependence (
A, 34h Each part is placed equally, so that there will be no inconvenience.

FIG. 6 shows a third embodiment.

In this third embodiment, it is possible to manually select and set the preset focal length in the first embodiment, and for example, it is possible to set each focal length to cover short distance, medium distance, and long distance. (The number that can be selected is not limited to the above three.)

The above-mentioned focal length can be set by switching a switch SW, and by switching the switch SW, the applied voltage output from the variable voltage output circuit 21 at a predetermined temperature is set to be different.

Further, when the temperature changes, the characteristic correction circuit 20f/i' is also switched in conjunction with it so that the set vertical distance can be maintained.

This third embodiment is suitable for use by people who have had their crystalline lenses removed due to cataracts, for example, and can be used without having to worry about wearing glasses.
It has the advantage that only one piece is required. It is also different when used by a person with reduced dioptric power.

FIG. 7 shows a fourth embodiment of the invention. In this embodiment, in the lens portion 4 (or 5) of the first example V, the liquid crystal 41 inlet 35 leading to each liquid crystal housing portion is provided in the frame 6 as shown in FIG. By inserting the liquid crystal from the end of the filling channel 35 that opens on the side surface of the frame 6, etc., and then closing this end,
This allows liquid crystal to be easily encapsulated.

The temperature change sensor 16 is designed to detect the temperature near the enclosure path 35. In FIG. 7, a substantially circular broken line indicates a boundary when liquid crystal is sealed.

The Sen 1 is the same as the 1st fruit IJ mountain 1ri 11 above.

FIG. 8 shows a fifth embodiment of the invention.

This embodiment 1+11 is the one shown in Figures 1, 5 and 6, with the cold V and the width of the crystal glasses 1 and 5 of the crystal glasses shown in Figures 1, 5 and 6.

For example, the AiI surface of the lens frame portion of the frame 6 ('i,
++, Amorphous solar frost pond 41 is attached to the amorphous oil (61 shown by the rule in Fig.
Therefore, the power source of the whole control section 3 is light weighted.

This charge; ba, weight, force]・:Kacharge'rR'rii',
If it is larger than 4, it will be charged through the backflow prevention Ichikawa diode (which is good.Also, the incident light intensity is weak,
If it is smaller than the charging power supply, it will be lowered and oscillates at the battery +10
/The voltage boosted by the AO converter should be rectified.
/i7 It's fine. Manually vIIIi these! Even if I tried to do it, it would still be white, and I would use the electromotive force E as a metaphor to detect whether the gravitational force E is greater than the military version of the military one.
The detection signal can be used to automatically switch (C).Also, if the control unit can be driven one time by the bait box or corner, the feed button source and the seven buttons can be automatically switched to directly drive the controller. 1
4@Eni) like] - But 1, In addition, the present invention VC4;)i/1 of each lens part on the right AF
The structure is not limited to those that are small in size.
For example, the +1η structure shown in Figure 9 may be used.

In FIG. 9, the left and right lenses 51 (only one is shown) have transparent plates 10a and 10b in FIG. ) and a concave lens-shaped liquid crystal 53a, 5
3b is enclosed and functions as a concave lens.

father,? 4'': In FIG. 9, the liquid crystals 53a and 53b may be shaped like flat plates, and the transparent plates 52a and Fi 3b may be shaped like concave lenses.

In addition, since there is a crystalline lens (lens), for focus correction, parallel plate-shaped transparent plates 8+55a and 8,55b0')l''+i are arranged in a square shape as shown in Figure 10. It has liquid crystals 56a and 5fib enclosed.
,.

But I'm lazy. In addition, in each of the above-mentioned lens parts, it is also possible to use a Fresnel structure having a serrated concavo-convex portion on one of the lens parts.For example, in the lens part shown in FIG. Each transparent plate 55a, 55h of A 1111
On the inner surface of Sl, Ii, there are a number of concave and convex grooves in the south shape, and one transparent mountain pole is cut out on the curve, respectively, to form crystals 56a and 5.
Is there an uneven surface f? g l+7 Fresnel structure (by doing so, it is possible to improve the responsiveness of the liquid crystal molecule orientation σ due to the application of i1 pressure i/C).

If this III%l is shown in Figure 5,
3a.

The inside of 33b is made into a concave 1f-n shape to form a liquid crystal 34a',
By combining 34 bllll as a concave lens, it can be made to function as both a concave lens and a convex lens as a composite lens.

In addition, by combining the above-mentioned lenses by 1F, it may be 3')-), or by combining the above-mentioned lenses by 1F, a variable focal length lens having both convex and concave lenses can be realized. It's a monkey.

Father, the above-mentioned Fresnel plum pickle was shaped not only on one frost' pole surface but also on the other market surface, and +1 ('0). Yo VC
(It can also be made into a single building.

In addition, a variable focal length lens can be constructed using a polarizer.
v. You can also.

Father, as shown in Fig. 10, in the flat glasses part, electrodes are provided concentrically, and the voltage is applied to the center side and the peripheral side.
By variably controlling the pressure so that it gradually becomes 9 - 1, it is possible to create a convex lens combination (it can be used as a doma lens, or a variable focal distance lens that serves both functions can be made into 8). can.

The configuration of the control unit 3 is not limited to that shown in FIG. 1 or FIG. 6, and may have a different configuration.For example, in FIG. The present invention also includes a simplified method in which the voltage is directly applied to the kidney control circuit 19 by human power.

Note that the transparent plates, convex lenses, etc. that form each lens part are not limited to glass. You can Also, the Q of the liquid crystal
It can also be made of a material that can cover 1[5g llll+ (heat shrinkage).

〔Effect of the invention〕

As described above, according to the present invention, a liquid crystal is used to configure a 1 point variable lens that can change the focal point h'1'I distance depending on the applied pressure, and the focal point distance due to temperature lf changes is constructed. Since there is a means for controlling the applied pressure based on the signal output of the temperature detecting means to compensate for the temperature change in distance,
Even if the temperature of the M area changes, this can prevent the focus from shifting due to the change in the amount, making it impossible to see clearly.

Furthermore, a single pair of glasses can cover multiple focal lengths, eliminating the need to carry multiple pairs of glasses at all times, and eliminating the hassle of changing glasses.

[Brief explanation of the drawing]

FIGS. 1 to 4 relate to a first embodiment of the present invention.
The figure is a configuration diagram showing the configuration of the first embodiment, FIG. 2 is a perspective view showing the appearance of the first embodiment, and FIG. 3 is a plan view of the first embodiment.
FIG. 4 is a characteristic diagram for explaining the vrh operation of the first embodiment, FIG. 5 is a block diagram showing the second embodiment of the present invention, FIG. 6 is a block diagram showing the third embodiment of the present invention, and FIG. FIG. 7 is a front view showing a part of the fourth embodiment of the present invention, FIG. 8 is a perspective view of the fifth embodiment of the present invention, and FIG. 9 is a diagram showing another example of the structure of the lens portion in the present invention. 10 is a cross-sectional view showing still another example of the structure of the lens portion in the present invention. 1...Liquid crystal glasses 2...Glasses section 3...Control section 4, 5...Lens section 6...Frame 8.10a, 10b-...Transparent plate 11a, llb@crystal 12a, 12b ...Variable focal length lens 16...Temperature sensor -7...Temperature detection processing section 18...Comparator 19...Ipplication, pressure control circuit 20...Characteristic correction circuit 21... Variable military output circuit 22...D
O/AC converter 41... Taiyo's heavy oil

Claims (1)

[Claims] (1) In liquid crystal glasses using a liquid crystal whose refractive index changes by changing the alignment state of liquid crystal molecules by applying an external voltage, applied voltage control that variably controls the temperature detection means of the liquid crystal or the voltage applied to the liquid crystal. Liquid crystal glasses characterized by being equipped with a solar cell for charging the power source of the device.