JPH02308214A - Spectacles with liquid crystal dimmer - Google Patents

Abstract

PURPOSE:To provide spectacles which have a dimming function according to whether an object is distant or close by forming transparent electrodes only on an upper half part and making the upper half part dark according to ambient light. CONSTITUTION:The transparent electrodes 12 and 12' are formed at parts corre sponding to the upper 2/3 parts of transparent film substrates 11 and 11' in the eye-ball shape of the spectacles and used partially as external lead-out electrode parts 12a. Then the transparent electrode parts of the substrates face each other across the gap of several mum, liquid crystal 14 is charged be tween them, and their peripheral parts are fixed with a sealing agent 13. Fur ther, polarizing plates 15 and 15' are stuck on their outside parts corresponding to the electrodes. A voltage is applied between the lead-out electrode parts 12a of the transparent electrodes 12 and 12' on both sides of a liquid crystal cell which is constituted as mentioned above, the electromotive force is generat ed corresponding to the intensity of light and the parts where the electrodes are formed so as to drive the liquid crystal according to the voltage vary in the light and shade of the liquid crystal with the quantity of external light to obtain the function of sunglasses.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to photochromic glasses that utilize liquid crystals to provide an n-eye dimmer, and are general sunglasses.

It can be applied to sunglasses for daily life and industrial use, such as pilot sunglasses and welding masks.

2. Description of the Related Art In general, there are glasses of this type as shown in FIGS. 3 and 4. As shown in Fig. 3, transparent electrodes 2, 2' are formed on the entire one side of transparent substrates 1, 1' made of glass or film, and the peripheral parts are sealed with the transparent electrode sides facing each other.
/Adhesive 3 and fill the gap with liquid crystal 4. Furthermore, polarizing plates 6 and 6' are pasted on both sides. However, this is not necessary if the polarizing plate and the substrate are integrated. Both electrodes 2.
By adjusting the applied voltage between 2' and 2', a full surface (C light shutter function is generated).By applying this function, a liquid crystal cell with the shape shown in Fig. 4 is formed, and by combining the left and right pairs, it can be used as photochromic glasses do.

Problems to be Solved by the Invention Conventional photochromic glasses change brightness and darkness as a whole depending on the brightness of the surrounding light in order to cut out strong light and glare. However, there was a practical problem in that when reading text under such conditions, the entire area was dark, making it difficult to read.

The present invention solves these problems and constitutes practical photochromic glasses that are effective and practical even when viewing near and far sides.

Means to solve the problem Fantastic Sight 1 Strong light is a distant view, and the object to be read is close to the distance of clear vision, so the lower half does not change and the upper half changes depending on the surrounding light. It is constructed by making it darker. That is, in the present invention, as a means for achieving this, a transparent electrode is not provided in the lower part, but is formed only in the upper part (shaded area).

Function As mentioned above, due to the extremely simple structure, it has the ability to function as sunglasses to cut out strong light when looking into the distance, and allows you to see directly in transparent and bright light when looking at your hands, making it practical. It is possible to obtain an immediate effect. The area that functions as sunglasses, that is, the area where the transparent electrodes are formed, can be selected from the practical optimum area, and it is effective to change the upper 1~- position and leave the remaining 111 or so unchanged. It is. Furthermore, in order to improve the practicality of photochromic glasses, it is also possible to affix a plastic sheet to at least one side of the glasses for the purpose of blocking ultraviolet rays or mechanically protecting them.

implementation row Next, a specific example will be shown and explained.

(Example 1) A transparent film in the shape of an eyeball for glasses as shown in Figure 2 (
For example, polyether sulfonate) substrates 11 , 11
Transparent electrode 12.12'
(a portion shown by a slanted line), a part of which is designated as the externally drawn-out solder pole portion 122L. Next, as shown in FIG. 1, the transparent electrode portions of this substrate are opposed to each other with a gap of several μm, and the inside thereof is filled with liquid crystal 14, and the peripheral portion thereof is fixed with sealant 13. Furthermore, a polarizing plate 15 is placed on the portion corresponding to the electrodes on both sides.
．． Paste 15'. However, if the loss of transmittance due to the polarizing plate is not a practical problem, it may be attached to the entire surface. Transparent electrodes 12 on both sides of the liquid crystal cell constructed in this way.
When a certain pressure is applied to each of the extraction electrode parts 12' by an AIC solar cell or the like, an electromotive force is generated depending on the intensity of light, and polarization is formed to drive the liquid crystal according to the pressure. The brightness of the liquid crystal changes depending on the amount of external light, functioning as sunglasses. However, in the area without electrodes, there is a transparent liquid crystal, but it does not operate, so it is not affected by ambient light and maintains a certain level of transmittance, so it always looks bright.

(Example 2) In the configuration shown in Example row 1, transparent film substrate 1
If you use a polarizing plate-integrated film with a light-spreading element sandwiched inside as 1.11', such as a film in which the polarizing element is sandwiched between PES (polyethersulfone) films, the polarizing plate 16° and 16' can be attached later. It can perform the same function without the need for it.

In this case, it is thinner by an amount equivalent to the thickness of the polarizing plates on both sides, making it even thinner and lighter than in the first row, and the step of temporarily pasting the polarizer by one inch is omitted, which is practically effective.

Effects of the Invention As described above, according to the present invention, the shape of the transparent electrode formed on the conventional glass or film substrate is partially changed, and the other parts are formed using the conventional method. As a result, when looking into the distance, you can use the upper part with a dimming function, and when looking at your hand, you can use the bright part that is always bright, thereby achieving the effect of two islands with one stone. The practical effect is a dog.

[Brief explanation of drawings]

FIGS. 1 and 2 are a cross-sectional view and a top view of a main part of photochromic glasses according to an embodiment of the present invention, and FIGS. 3 and 4 are a cross-sectional view and a top view of a conventional example. 11.11'...Transparent film substrate, 12.1
2'...Transparent electrode, 13...Sealing agent, 14...Liquid crystal, 15.15'...Polarizing plate.

Claims (4)

[Claims] (1) Liquid crystal dimming glasses in which liquid crystal is filled between opposing transparent substrates with transparent electrodes formed in the upper half. (2) The liquid crystal dimming glasses according to claim 1, wherein a polarizing plate is provided only in the portion corresponding to the transparent electrode. (3) The liquid crystal light control glasses according to claim 1, wherein a heat-resistant film sandwiching a polarizing element is used as the transparent substrate. (4) Liquid crystal light control glasses in which the composition according to claim 1 is held between a protective film, an ultraviolet cut film, or a combination of both.