CN102081241A - Light-controlled liquid crystal eyeglasses - Google Patents

Abstract

The invention discloses light-controlled liquid crystal eyeglasses, which comprises liquid crystal lenses (1) and a bracket (2) for fixing the lenses, wherein a control circuit is connected with the liquid crystal lenses and is connected in series with a power supply, a switch (5), a photo-resistor (6) and a sliding variable resistor (7); and one end of variable resistor is connected with one pole of each liquid crystal lens, and the other end of the variable resistor is connected with the other pole of the liquid crystal lens through a crystal diode (11). The light-controlled liquid crystal eyeglasses can automatically shade bright light to protect eyes of a user, can be taken as an eye protection device in aspects of electric welding, smelting, firing, military and the like, have low cost and are easy to make.

Description

The optically controlled liquid crystal glasses

Technical field

The present invention relates to a kind of human eye and protect apparatus, particularly a kind of optically controlled liquid crystal glasses.

Background technology

For avoiding the spread effect of moment high light generation to eyes; thereby produce unnecessary accident; people have invented out the device of various protection eyes; China's utility model patent; the patent No. 93221282.4; name is called " avoiding the moment liquid crystal protective glasses injected of high light "; a kind of liquid crystal protective glasses is disclosed; comprise the liquid crystal glasses sheet; reach the battery that therewith is fixed on the frame; photoelectric switching circuit and liquid crystal driver are formed; described photoelectric switching circuit is by the photoelectric sensor that is placed on before the lens, and current and voltage signals is regulated the switching amplifier of amplification, and LCD voltage controller and liquid crystal lcd driver are formed; this protective glasses structure is too complicated; only switching amplifier just is made up of three operational amplifiers, so the overall weight of glasses is inevitable overweight, causes people to wear these glasses and lacks comfort; and increased the production cost of glasses, so improved necessity is arranged.

Summary of the invention

The object of the present invention is to provide and a kind ofly can cover the moment high light, regulate the light and shade of eyeglass automatically, and can be as sunglasses, it is with low cost that ornamental sunglasses use, and is easy to make the optically controlled liquid crystal glasses of comfortable wearing.

For achieving the above object, the solution of the present invention is: a kind of optically controlled liquid crystal glasses, comprise liquid crystal lens, and the support of fixing len, there is control circuit to link to each other with described liquid crystal lens, its special feature is: described circuit is serially connected with power supply, switch, a photoresistance, a slip variable resistor, utmost point at a variable-resistance end and liquid crystal lens joins, and the other end joins by another utmost point of a crystal diode and liquid crystal lens.

Adopt such scheme, with the circuit that electronic component is seldom formed, photoresistance wherein plays automatic switch, and resistance is very little when high light, resistance became big when light was dark, the slip variable resistor is regulated size of current, regulates electric current by liquid crystal lens with this, when by electric current when big, the liquid crystal lens deepening, block high light, thereby regulated the bright, dark of liquid crystal lens automatically, realized purpose of the present invention.

Below in conjunction with diagram and embodiment scheme is described in more detail.

Description of drawings

Fig. 1 is the structural representation of optically controlled liquid crystal glasses;

Fig. 2 is optically controlled liquid crystal glasses chip architecture figure;

Fig. 3 is the circuit diagram of optically controlled liquid crystal glasses;

Fig. 4 is a slip variable resistor synoptic diagram among Fig. 3.

Embodiment

As Fig. 1 is the structural drawing of the application's optically controlled liquid crystal glasses, comprise liquid crystal lens 1, the support 2 of fixing len, attached integrated electron device in the inside and circuit, overarm brace 3, there is circuit the inside, join with liquid crystal lens, on the ear-hang of support, be provided with pushbutton switch 5 and button cell box 4, on support 2, also be provided with slide rheostat 7, the photoresistance 6 of optical sensor.Since handsome in appearance generous, ornamental sunglasses made, and sunglasses all can.

As shown in Figure 2, be the chip architecture figure of this optically controlled liquid crystal glasses, the surface is a glass mirror 8, intermediate course is an indium tin oxide 9, forms electrode X, Y, on the liquid crystal layer 10 in the middle of being added in, when by its electric current during greater than 0.1mA, liquid crystal is no longer transparent, becomes muddy.

In Fig. 3 circuit diagram, as described in scheme, circuit comprises the power supply that battery case 4 forms, the power supply of present embodiment is a button cell, and voltage is E=1.5V, pushbutton switch 5, photoresistance 6, the photoresistance model of present embodiment is uR-74A, dark resistance 1M Ω wherein, light resistance 0.7-1.2K Ω, slip variable resistor 7, above element all is connected in series, and the variable-resistance travelling arm that wherein slides links to each other and links to each other with a positive termination electrode of liquid crystal lens with an end wherein, is made as the Y end, the other end links to each other with another negative terminal electrode of liquid crystal lens by a crystal diode 11, be made as the X end, wherein crystal diode is the NPN type, cut-in voltage 0.7V.

Change as the resistance of slip variable resistor in circuit among Fig. 3, as indicating among the figure, dotted line 12 left side bearing resistance are low, dotted line 13 right side bearing resistance height, resistance range O-R _7-12-R _7-13-R _7-14Corresponding numeral is O Ω-0.61K Ω-0.875K Ω-1M Ω, wherein R _7-12Be dotted line 12 place's resistance, R _7-13Be dotted line 13 place's resistance, R _7-14Be the slide rheostat maximum resistance, satisfy:

$\frac{R_{7-12}}{R_{7-12}+R_{6-1}}\≈\frac{0.7}{1.5}---\left(1\right)$

$\frac{R_{7-13}}{R_{7-13}+R_{6-2}}\≈\frac{0.7}{1.5}---\left(2\right)$

R wherein _6-1Be photoresistance 6 (in the electric welding environment) resistance value under high light, R _6-2Be the resistance value of photoresistance 6 in dark surrounds or common photoenvironment, in general, the resistance value R of photoresistance 6 ₆Scope is

R _6-1＜R ₆＜R _6-2……(3)

Be photoresistance 6 resistance minimum under the high light environment, resistance maximum under dark surrounds or common illumination condition.

Its resistance value is R when slip variable resistor 7 is in a certain state ₇, the resistance value of photoresistance is R ₆, then the terminal voltage of X, Y is:

$u_{x\·y}=\frac{R_7}{R_6+R_7}E---\left(4\right)$

Work as u _Xy＞0.7 liquid crystal deepening, u _XyBig more, dark more, u _Xy≤ 0.7 liquid crystal is transparent, and slide rheostat slide plate change in location situation is discussed below:

A, slide plate are in dotted line 12 positions, promptly

O＜R ₇＜R _7-12……(5)

By formula (1), (2), (3), (4), (5) as can be known

u _xy＜0.7………(6)

So no matter have or not illumination X, Y section voltage is all the time less than 0.7V, and diode 11 is in cut-off state, and no current flows through LCD panel, and LCD panel is transparent all the time.

B, slide plate are in zone between 12,13 liang of dotted lines, have

R _7-12＜R ₇＜R _7-13……(7)

By formula (1), (2), (3), (4) and (7) as can be known:

(b ₁) there be not under illumination or the common light conditions u _XyAll the time less than 0.7, promptly diode 11 is in cut-off state all the time.

(b ₂) when illumination is in photoresistance 6, its resistance reduces, cause the slide rheostat dividing potential drop to increase, when greater than 0.7v, diode 11 is breakdown, because the resistance of liquid crystal shell and diode 11 is little, can be considered slide rheostat by short circuit, thereby bigger electric current makes the liquid crystal deepening through LCD panel, realizes having stopped automatically the purpose of light.

(b ₃) in this interval, slide plate moves to right, the slide rheostat resistance R ₇Increase, dividing potential drop increases, thus photoresistance by small illumination, resistance diminishes a little, will cause slide rheostat R ₇Top dividing potential drop reaches 0.7V, diode 11 is hit logical, makes the liquid crystal deepening, so slide plate moves to right in this 12,13 zone, to the illumination reaction sensitivity, it is blunt to illumination reaction to move to left.

(b ₄) can obtain by formula (4), after diode 11 was breakdown, when intensity of illumination changed, the photoresistance resistance also changed, and light is strong more, and the photoresistance resistance is more little, and even the slide plate position is motionless, circuital current is big more, liquid crystal is dark more, plays effect with an automatic light meter.

C, right slide plate are in zone, dotted line 13 the right, promptly

R _7-13＜R ₇＜R _7-14……(8)

By formula (2), (3), (4) and (8) are u as can be known _Xy＞0.7V.

So no matter how to slide u at this regional slide plate _XyAll greater than 0.7V, diode 11 hits logical, and 7 short circuits of slip variable resistor are so liquid crystal is in conducting state always, liquid crystal lens is in dark always, and light is strong more, and the resistance of photoresistance is more little, electric current is big more, and eyeglass is dark more, so also light is played autoregulation.

The optically controlled liquid crystal glasses of this programme can reach and block high light automatically, and the protection eyes can be used as electric welding, smelting, burning stove, and the eye protection device of aspects such as military affairs is with low cost, be easy to make, and be a kind of device of practicality.

Claims (6)

1. optically controlled liquid crystal glasses, comprise liquid crystal lens (1), and the support (2) of fixing len, have control circuit to link to each other with described liquid crystal lens, it is characterized in that: described circuit is serially connected with power supply, switch (5), a photoresistance (6), a slip variable resistor (7) joins at the utmost point of a variable-resistance end and liquid crystal lens, and the other end joins by a crystal diode (11) another utmost point with liquid crystal lens.

2. a kind of optically controlled liquid crystal glasses according to claim 1, it is characterized in that: the structure of described liquid crystal glasses comprises liquid crystal lens (1), the support of fixing len (2), attached integrated electron device in the inside and circuit, overarm brace (3), there is circuit the inside, join with liquid crystal lens, on the ear-hang of support, be provided with pushbutton switch (5) and button cell box (4), on support (2), also be provided with slide rheostat (7), the photoresistance of optical sensor (6).

3. a kind of optically controlled liquid crystal glasses according to claim 1 and 2 is characterized in that: the chip architecture of liquid crystal glasses comprises that the surface is glass mirror (8), and intermediate course is indium tin oxide (9), forms electrode X, Y, on the liquid crystal layer (10) in the middle of being added in.

4. a kind of optically controlled liquid crystal glasses according to claim 1 is characterized in that: described power supply is a button cell.

5. a kind of optically controlled liquid crystal glasses according to claim 1 is characterized in that: photoresistance (6) model is uR-74A.

6. a kind of optically controlled liquid crystal glasses according to claim 1, it is characterized in that: the travelling arm of slip variable resistor (7) links to each other and links to each other with a positive termination electrode of liquid crystal lens with an end wherein, and the other end links to each other with another negative terminal electrode of liquid crystal lens by a crystal diode (11).

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