DE202014001058U1 - Window for a motor vehicle, in particular aircraft - Google Patents

Abstract

Window (30) for a motor vehicle, in particular an airplane, with • an LCD panel (16) arranged as a glare protection device; • a light sensor (18) for detecting a light intensity and / or light wavelength outside the motor vehicle, and • an energy source (26) for operating the glare protection device, • the LCD panel (16) darkening depending on the light intensity and / or light wavelength.

Description

The present invention relates to a window for a motor vehicle

Every day, 2-3 laser attacks are reported on aircraft pilots. Laser pointers are aimed at the attacked pilots during the flight to dazzle them. These attacks jeopardize the safety of aviation and thus the safety of human life. Such laser attacks are not limited to aviation, but also happen in other traffic areas.

As a countermeasure, it is conceivable to use goggles for the pilots or other drivers. A sunscreen glasses for general protection of the eyes against intense light influences, for example, in the DE 19714434 A1 described. Another protective eyewear for protecting the eyes against laser light is also in the WO 2006/073408 A2 described. However, a pair of goggles has the disadvantage that it generally restricts the driver's view and thus obstructs the view of instruments. A laser attack thus remains safety-critical.

It is an object of the invention to provide improved protection for drivers against glare, in particular by laser light.

The object is achieved by means of a device according to the main claim.

The subject of the main claim relates to a window for a motor vehicle, in particular aircraft, with an arranged as anti-glare device LCD panel; a light sensor for detecting a light intensity and / or wavelength outside the motor vehicle, and an energy source for operating the anti-glare device, wherein the LCD panel darkens depending on the light intensity and / or light wavelength.

Before describing embodiments of the invention in more detail below, it should first be noted that the invention is not limited to the described components or the described method steps. Furthermore, the terminology used is not a limitation, but has only exemplary character. Insofar as the singular is used below in the description and the claims, the plural is included in each case, unless the context explicitly excludes this.

The invention is thus based on the idea to provide a glare protection device which is part of the window of the respective motor vehicle. In particular, it is provided that the window is used as a windscreen of a motor vehicle, in particular a cockpit of an aircraft. Motor vehicles are understood to be air, water and land vehicles of all kinds.

The window continues to know a light sensor, which reacts in response to a light. If a corresponding safety-critical incidence of light from the light sensor is detected, then the anti-glare device is activated, so that at least in one area of the window an incidence of light is reduced or completely prevented. For this purpose, an LCD panel is used as a glare protection device, which is then acted upon by a voltage from the energy source when the light sensor responds to a corresponding incidence of light. The LCD panel can then darken as a countermeasure, which is understood as a reduction in its translucency. For this purpose, the window preferably has a polarizing filter which cooperates with the LCD panel.

If laser light now strikes the light sensor when it is aimed at the window, the LCD panel darkens automatically very quickly, which can typically take place in 1/25000 s. In a correspondingly rapid manner, a light transmission of the window is restored as soon as no more laser light hits the light sensor.

If the LCD panel is darkened, light, in particular laser light, can no longer, or at least attenuates, pass through the window and thus to the driver. The driver is not generally hampered in his view and thus sees all his instruments. Only the window is darkened.

It is particularly preferred if a multiplicity of light sensors are used. These can be arranged, for example, in a matrix.

It is further preferred if the at least one light sensor is arranged in the region of the LCD panel, preferably on or in the side of the LCD panel which faces away from the driver. For example, multiple light sensors can be operated in parallel so that the LCD panel darkens even when a single light sensor is responding. Such a parallel connection of light sensors requires no further regulations for darkening the LCD panel, whereby a very störungsunanfälliger and robust operation is achieved at the same time low production costs.

In one embodiment, the light sensor is a photodiode.

In this embodiment, a photodiode is used as a concrete light sensor. Photodiodes are known in the art. They are available in many different variants, so that a particularly good adaptation of the window to specific requirements, such as required angles of incidence or certain wavelengths of the laser light, is possible.

A typical photodiode reacts most effectively at an angle of incidence of the laser light of 0 °, ie at a frontal irradiation. Depending on the angle of incidence relative to the orientation of the photodiode, the sensitivity decreases. For example, photodiodes are known which no longer react at an angle of incidence of 90 °. Preference is therefore given to an arrangement which ensures an angle of incidence between 0 ° and 20 ° on the photodiode. Experiments have shown that this can be assumed that a very effective response of the photodiode. Particularly preferred are photodiodes with small dimensions in order to prevent optical impairment of the driver by the photodiodes when looking through the window. Particularly preferred are photodiodes with microscopic dimensions.

In one embodiment, the light sensor reacts to light wavelengths of 400 nm to 1100 nm.

In this embodiment, the light sensor responds particularly well to wavelengths that are typical for laser light. In this range, different laser colors are covered in an advantageous manner. There are also other areas conceivable, for example, from 400 nm to 1200 nm, to cover a larger range of laser light. Even smaller areas are conceivable which cover only one or a few laser light colors in order to increase the sensitivity of the light sensor to the corresponding laser light.

In one embodiment, the anti-glare device is arranged between two panes.

In this embodiment, the LCD panel is arranged in a sandwich construction between two panes, for example two window elements. This has the advantage that the LCD panel is protected against mechanical influences, which ensures a long service life and robustness. In addition, this results in a modular design, wherein conventional window components can be used, between which the anti-glare device is arranged.

It is particularly preferred if, in addition to the anti-glare device, the at least one light sensor and / or corresponding conductor tracks are also arranged between the panes. This results in a particularly simple and compact structure of the window, which does not affect the statics of the window.

In one embodiment, the anti-glare device interacts with at least two polarization filters.

In this embodiment, two polarization filters are associated with the LCD panel. In a preferred embodiment, the LCD panel is disposed between the two polarizing filters. In addition, the two polarization filters are preferably rotated by 90 ° in their polarization direction to each other. By using the two polarizing filters results for the anti-glare device, a similar operating principle as that of a welder protection screen, with infrared filters and / or heat shields are not required for this purpose.

Overall, the use of the polarizing filter is a particularly effective way to darken and thus protect the driver.

In one embodiment, the window has a plurality of LCD panels that can darken independently of each other.

In this embodiment, a plurality of anti-glare devices is provided, which can make areas of the window opaque to light. Thus it is possible to darken the window in segments, whereby the rest of the window can still be viewed. This results in a particularly effective protection of the driver while minimizing his visual restriction. In order to achieve this, it is particularly preferred if each of the antiglare devices is assigned a single or a group of its own photodiodes.

The experimental report of the inventor on which the invention is based is attached below:

Experiment description "Jugend forscht 2013"

1st goal of the experiment

In the media, I heard about a near miss. The pilots of an aircraft had been blinded during the landing approach of laser beams that have directed unknown to the cockpit disks. I wondered if there is no protection device that protects pilots from such light attacks and enables a safe landing approach.

2. What could be the result?

Such windows in the cockpit of an aircraft should darken in case of sudden, strong light incidence and thus ensure the desired protective function.

3. History

In physics lessons we discussed as a possible solution the application of the protective shield of an automatic welding helmet. However, the use in connection with a laser according to the operating instructions was excluded. After extensive research, I found solutions in the physics of liquid crystal and polarized light.

3.1 liquid crystals:

For the first time, the liquid crystal was described in 1888 by Friedrich Reinitzer, when he documented the colorful appearance of the solidification and melting of colesteryl benzoate. He found that the compound at 145 ° C, although in the liquid state, the milky-cloudy appearance but still up to 179 ° C persisted. As the temperature rises above 179 ° C, a crystal-clear liquid is formed. Otto Lehmann examined these and other substances in 1904 and spoke for the first time of "crystals that flow". In 1920, the French mineralogist Georges Friedel then gave the first chemist Daniel Vorlänger fundamental investigations on liquid crystals. Technical interest in liquid crystals only arose in 1964 through the discovery of electro-optical switchability by the American electrical engineer George Harry Heilmeier. [see. Source 9)]
http://de.wikipedia.org/wiki/Fl%C3%BCssigkristall

3.2 Polarization of light:

The Dutch naturalist Christian Huygens was the first to recognize the polarization of light in 1678. He provided the explanation for the birefringent calcite birefringence: "Since there are two different types of refraction, I concluded that there are also two different types of light waves." Since experiments by the French physicist Augustin-Jean Fresnel in 1817, we know that light in mutually perpendicular polarized components can be dismantled. [see. Sources 10) and 11)] http://de.wikipedia.org/wiki/Christiaan_Huygens
http://de.wikipedia.org/wiki/Augustin_Jean_Fresnel

4. Physical basics

4.1 The liquid crystals

Liquid crystals are found in liquid crystal displays (LCD stands for "liquid crystal display"), for example in watches, calculators, mobile phones, monitors and 3D glasses. The displays require a voltage to switch the display. Liquid crystals consist of long, thread-like molecules.

In liquid crystal displays, the interaction between the elongated molecules and electrical voltage is utilized. The interaction depends on whether the electric field of the light wave is oriented along the molecular axis or transversely thereto. The electrons in the molecule can move more easily parallel to the axis. Because of this, there is another interaction and, accordingly, another refraction of light.

This is exploited in a liquid crystal display, cf. 1 and 2 :
Between two glass plates 3 . 5 ; 9 . 11 is the liquid crystal 4 . 10 , The glass plates have a directional coating along which the molecules can align. The glass plates are rotated by 90 ° (with respect to the orientation of their coatings) against each other, thereby turning the orientation of the molecules. This is called a TN cell (T for "twisted" 4 - twisted and N for "nematic" 10 - threadlike). Outside on the glass panes are polarizing filters 2 . 6 ; 8th . 12 attached, which were also rotated by 90 °.

If now according to 1 When light comes from below, the first polarization filter passes only one plane of oscillation of the light, which is oriented parallel to the molecules. Now, the twisted molecules have the property of interacting with the light by rotating the plane of vibration of the light so that the light above has rotated its polarization by 90 °. Thus it can pass also the upper filter and the cell appears brightly ( 1 ).

But if you apply an electrical voltage, the molecules orient themselves around. Then you do not turn the polarization plane of the light and the cell appears dark ( 2 ).

When the tension is removed, the molecules rearrange in the twisted orientation. But this takes a moment, so you will always find information on switching times with LCD monitors. There are also temperature-, light- and pressure-sensitive liquid crystals.

4.2 The polarization of light

Light coming from an optically thinner medium onto glass or a reflective material is split into two parts, the reflected and the refracted. This is because the light is never completely reflected, but only part of the light beam. The rest of the light is broken. This is called polarization.

However, this polarization can only be explained if we assume that light propagates in transverse waves. If light waves hit glass, the electrons on the glass surface are excited to vibrate. The vibrating electrons emit waves again and produce the reflected and the refracted light wave.

If this light wave strikes a polarizing film (polarizer), the wave is only transmitted in a specific direction, as in the case of a mask. Another direction would stop the polarizer.

Light reflected from transparent materials (polarizer) is completely polarized when the propagation directions of reflected and refracted light are perpendicular to each other. With two polarizing filters you can determine the angle of rotation and thus influence the passage of the light.

5. Structure of the test series

5.1 terms

5.1.1 Automatic welding helmet

It is also referred to as an automatic welder protection filter. This helmet darkens the welder's shield during welding by itself within 25000ths of a second of arc creation. He becomes bright again when no dazzling, very bright light is recognized. The helmet can therefore remain in front of the face during the entire welding process.

5.1.2 Welding protection screen

This disc is the most important thing about the automatic welding helmet. Through them, the welder sees through during the welding process. It contains liquid crystals that cause the glass to darken during the welding process, protecting the eyes from the bright light. The disk is controlled by light-sensitive sensors (photodiodes).

5.2 parts

• Experiment 1: Protective screen, cable, power source, tripod material
• Experiment 2: Protective screen, cable, power source, tripod material, photodiode, laser
• Trial 3: Protective screen, cable, power source, tripod material, photodiodes, laser

6. Carrying out the test series

The use of the protective shield of an automatic welding helmet is excluded in the context of a laser according to the operating instructions. After extensive research and experimentation as well as familiarization with the physics of liquid crystal and polarized light, I developed a structure that darkens in the event of sudden, strong light incidence and thus represents the desired protective function. By rebuilding the welding shield, it now reacted even when using a laser and darkened.

6.1 Description of Experiment 1:

Connect welder helmet disk to circuit. I would like to test whether the disc can be made to darken outside of my welding helmet device. For this I took out the disc from the original version and connected it to another power source.

test description

The welding helmet disk is connected to a circuit. I want to find out if I can darken the disc permanently with the help of current flow and if so, if the dark disc can stop laser light.

Experimental Procedure

• a) Without tension, the disc is transparent. I hold the laser on it to test whether the disc lets the laser light through.
• b) When the voltage is applied (2 V) the disc is dark. I hold the laser on it to see if the disk lets the laser light through.

experimental observation

• a) The greenish disk passes the laser light when no voltage is present.
• b) The disc darkens more and more with increasing tension. At 2V she is completely black. I point the laser at the glass and the laser light does not get through. The disc stops the laser light.

Result

The disc darkens permanently when the voltage is applied, and the laser can then no longer shine through.

So the disk can stop laser light. But I want to make the laser light cause the dimming (V2).

6.2 Description of Experiment 2:

Darkening of the welding helmet disk (connected to circuit) by laser light with the help of a photodiode After the experiment 1 is successful, I want to bring in experiment 2 by the laser pointer the disc to darken. For this I have extended the device by a photodiode in the circuit.

test description

The disk is part of a circuit in which there is also a photodiode. The resistance in the photodiode drops abruptly as soon as laser light falls on the photodiode and the window would have to darken.

Experimental Procedure

I turn on the power (2V) and put the laser light on the photodiode.

experimental observation

When I turn on the power, the disk remains transparent. But as soon as the laser light falls on the photodiode, the disc darkens.

Result

The disc now darkens through the laser light. For the structural implementation, however, the photodiode (s) would have to be on the disk (V3), as is aimed at the glare of pilots on the discs.

6.3 Description of Experiment 3:

• Welder helmet disk connected to circuit, with photodiodes in front of the disk

In the consequence that attempt 2 is also succeeded, I want now photodiodes according to 3 in front of the anti-glare device 16 , here in this case the welder protection screen described above, position so that the anti-dazzle device darkens when laser light is on it or on the photodiodes in front of it 18 falls.

The anti-glare device 16 is part of a circuit with a high resistance. In front of the LCD panel are photodiodes 18 placed, which have the high resistance in the unlit condition. The resistance drops as soon as laser light falls on a photodiode and the anti-glare device 16 would have to darken.

Experimental Procedure

I turn off the power to a power source 26 on (2 V) and place the laser light on one of the photodiodes 18 in front of the anti-glare device 16 ,

experimental observation

When I turn on the power, the anti-glare device stays on 16 transparent. But as soon as the laser light on one of the photodiodes 18 falls, darkens the anti-glare device 16 from.

The anti-glare device 16 So now darkens when laser light on her or on the front of her positioned photodiodes 18 falls.

I would have achieved my goal.

7. Evaluation / conclusion

7.1 Evaluation of the test series

I wanted to find a protective device for pilots that would protect against light attacks and enable a safe landing.

I have basically achieved my goal. However, the technical production of the disc still involves various difficulties [cf. 8.2.2].

7.2 Use in an airplane

Since an aircraft cockpit generally has four or more discs, a disc hit by laser beam can darken without significantly affecting the pilot's vision. Thus, the safety of the pilots and the aircraft would be guaranteed.

8. Error determination

8.1 Inaccuracies in the devices

Unfortunately, the data sheet of the welding shield used does not give any information on the reaction conditions of the windscreen. Only welding methods are described for which the protective screen may be used. Therefore, I was dependent on my experiments.

8.2 Technical problems

8.2.1 Separation of the disc layers

I wanted to find out what different layers the welder's helmet shield is made by separating them with a glazier. The glazier gave me to understand that this is only possible with heat.

He separated the individual disks, but the liquid crystal layer was destroyed. In addition, the disc discolored yellowish.

8.2.2 Drilling the disc

To make experiment 3 easier, I wanted to drill holes in the disk so that the photodiodes are in the disk plane. That failed, however. The glazier has drilled a hole, but again the liquid crystal layer has been destroyed. The liquid crystals had leaked out of position and the disk was unusable. A cutting laser for the attachment of the extinguishers was not available to me. But even here it is doubtful whether the liquid crystal layer could have been obtained.

8.3 The wavelength of the laser light

I have not studied the direct relationship between the wavelength and the response of the photodiode. I relied on the device information.

8.4 The color of the laser light

I have not yet investigated the direct relationship between the laser color and the photodiode response.

8.5 The characteristics of the detector diodes

I used Siemens silicon PIN photodiodes with very short switching time (SFH 203). The following information and diagrams are taken from the Siemens data sheet [cf. Source 8)] http://produktinfo.conrad.com/datenblaetter/150000-174999/154002-da-01-ml-Fotoiode_Pin_SFH203_de_en.pdf

Main features:

• • E Especially suitable for applications in the range of 400 nm to 1100 nm, cf. 6
• • short switching time (about 5 ns)
• • 5 mm plastic design in LED housing

Relative spectral sensitivity SFH 203 S _rel = f (λ)

This type of diode has its highest sensitivity at a wavelength of about 850 nm. The laser pointer used by us has a wavelength of 532 nm ± 10, so it is not optimally matched to this type of diode.

This diode type has according to 7 its greatest sensitivity when the light is in club shape (<20 °) centrally around the 0 ° axis.

9. Safety

The green laser used in the test series corresponds to the hand lasers available abroad, one of which was used to dazzle the pilots. The wavelength is 532 nm ± 10. It has an output power of 100 mW and thus corresponds to laser class 3b. When working with the laser, safety regulations must be observed. In particular, the direct view into the laser beam or its reflection is to be avoided.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. Show it:

1 a schematic representation of an LCD panel in a first operating state,

2 a schematic representation of an LCD panel in a second operating state,

3 an embodiment of a module for glare protection,

4 an arrangement of a plurality of modules 3 .

5 a window with the arrangement off 4 .

6 a first diagram of an exemplary photodiode, and

7 a second diagram of an exemplary photodiode.

1 shows a schematic representation of a structure of an LCD panel in a first operating state in which the LCD panel is translucent. This operating state is also called Operating status "bright". The LCD panel is behind a pane in the form of a protective glass 1 and between a first polarizing filter 2 and a second polarizing filter 6 arranged. It has a first glass plate 3 and a second glass plate 5 on. Between the first glass plate 3 and the second glass plate 5 is liquid crystal 4 arranged. The representation symbolizes the molecular orientation of the liquid crystal 4 , As shown here, this is twisted, so "twistet". The polarization filters 2 and 6 are rotated in their polarization direction by 90 ° to each other.

If light is passed through the arrangement shown, it is first on the first polarizing filter 2 polarized, by the liquid crystal 4 changed in its polarization and finally by the polarizing filter 6 guided. Due to the changed polarization of the light, it allows all polarized light to pass through.

2 shows a schematic representation of a structure of an LCD panel in a second operating state in which the LCD panel is darkened, that is opaque, is. This operating state is also referred to as operating state "dark". The LCD panel is behind a pane in the form of a protective glass 7 and between a first polarizing filter 8th and a second polarizing filter 12 arranged. It has a first glass plate 9 and a second glass plate 11 on. Between the first glass plate 9 and the second glass plate 11 is liquid crystal 10 arranged. The representation symbolizes the molecular orientation of the liquid crystal 11 , As shown here, this is undirected, so "nematic". The polarization filters 8th and 12 are rotated in their polarization direction by 90 ° to each other.

If light is passed through the arrangement shown, it is first on the first polarizing filter 8th polarized, by the liquid crystal 10 unchanged in its polarization and finally through the polarizing filter 12 guided. It blocks all polarized light due to the unchanged polarization of the light.

In the following explanations, like reference numerals are used to avoid unnecessary repetitions for like assemblies.

3 shows a module 14 that can serve for glare protection. The module 14 has an LCD panel 16 on, on the nine photodiodes 18 are arranged in a matrix. In preferred embodiments, the LCD panel acts 16 with two polarizing filters together, as related to the 1 and 2 has been described. The photodiodes 18 are to a first power line 20 connected. The LCD panel 16 is with a utility line 22 electrically connected. The photodiodes 18 are also over a line 24 with the LCD panel 16 connected. The supply line 22 as well as the power line 20 are also with different poles of an energy source 26 connected.

The photodiodes 18 serve as switching elements, which then create a circuit between the power source 26 and the LCD panel 16 close when light falls on them. In this case, the LCD panel 16 supplied with sufficient electrical voltage to completely change its state of translucency, regardless of which or how many of the photodiodes 18 close the circuit. Overall, the modular design offers the possibility of the photodiodes 18 in the area of the LCD panel 16 to arrange. It is particularly preferred if the photodiodes 18 from the LCD panel 16 being held.

4 shows a module assembly 28 of five modules 14 , The module arrangement 28 illustrates the advantage of the compact design of the module 14 out 3 , By using a shared power line 20 ' and supply line 22 ' is it possible a common source of energy 26 ' for all modules 14 use. This will ensure that the window overall by saving energy sources 26 very compact and modular.

5 shows a window 30 with the module arrangement 28 out 4 , It becomes clear that a module-wise darkening of the window 30 is possible. The independence of the individual modules 14 within the module arrangement 28 thus leading to a protection of the driver, at the same time not attacked areas of the window 30 stay transparent. In 5 For reasons of clarity, only one module arrangement is an example 28 shown. In preferred embodiments, further parts of the window are 30 or the entire window 30 with modules 14 , Modular arrangements 28 and / or modules or module arrangements of other sizes and dimensions.

6 shows a diagram in the form of a Cartesian coordinate system with an abscissa with respect to a wavelength of light in [nm]. Further, the diagram has an ordinate with respect to a sensitivity in [%] of an exemplary photodiode. Within the coordinate system, an approximately mountain-shaped curve is depicted, which describes the characteristics of the exemplary photodiode. It can be seen clearly from this graph that the photodiode has its highest sensitivity at a wavelength of approximately 850 nm.

7 shows a two-part diagram. Here, the first part is arranged in the right area and also represents a Cartesian It has an abscissa with respect to an incident angle of light on the photodiode in [degrees]. In addition, the coordinate system has a dimensionless ordinate with respect to the sensitivity of the photodiode. Within the Cartesian coordinate system is shown an almost L-shaped curve describing the characteristics of the exemplary photodiode. It can be seen clearly from this curve that the photodiode has its highest sensitivity at an angle of incidence of 0 ° and a very good sensitivity between 0 and 20 °.

The second part is arranged in the left area and represents the same information as the first part, with the representation in polar coordinates to clarify the information.

Although the invention has been described in detail in the drawings and the foregoing description, the illustrations are illustrative and exemplary and not limiting. In particular, the choice of the proportions of the individual elements shown in the drawing should not be construed as necessary or restrictive. Furthermore, the invention is not limited in particular to the illustrated embodiments. Other variants of the invention and their execution will become apparent to those skilled in the art from the foregoing disclosure, the drawings and the claims.

Terms used in the claims, such as "comprising," "having," "including," "containing," and the like, do not exclude other elements or steps. The use of the indefinite article does not exclude a majority. A single device can perform the functions of several units or devices mentioned in the protection claims.

LIST OF REFERENCE NUMBERS

1

protective glass

2

polarizing filter

3

glass plate

4

liquid crystal

5

glass plate

6

polarizing filter

7

protective glass

8th

polarizing filter

9

glass plate

10

liquid crystal

11

glass plate

12

polarizing filter

14

module

16

LCD panel

18

photodiode

20

power line

22

supply line

24

management

26

energy

28

module assembly

30

window

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19714434 A1 [0003]
• WO 2006/073408 A2 [0003]

Cited non-patent literature

• http://en.wikipedia.org/wiki/Fluid_Crystal [0031]
• http://en.wikipedia.org/wiki/Christiaan_Huygens [0032]
• http://en.wikipedia.org/wiki/Augustin_Jean_Fresnel [0032]
• http://produktinfo.conrad.com/datenblaetter/150000-174999/154002-da-01-ml-Fotoiode_Pin_SFH203_de_en.pdf [0070]

Claims (6)

Window ( 30 ) for a motor vehicle, in particular an aircraft, with an LCD panel arranged as an antiglare device ( 16 ); • a light sensor ( 18 ) for detecting a light intensity and / or light wavelength outside the motor vehicle, and • an energy source ( 26 ) for operating the anti-glare device, wherein the LCD panel ( 16 ) darkens depending on the light intensity and / or light wavelength. Window ( 30 ) according to claim 1, characterized in that the light sensor ( 18 ) a photodiode ( 18 ). Window ( 30 ) according to one of claims 1 or 2, characterized in that the light sensor ( 18 ) reacted to light wavelengths from 400 nm to 1100 nm. Window ( 30 ) according to one of the preceding claims, characterized in that the anti-glare device between two panes ( 1 . 7 ) is arranged. Window ( 30 ) according to one of the preceding claims, characterized in that the anti-glare device with at least two polarization filters ( 2 . 6 ; 8th . 12 ) interacts. Window ( 30 ) according to one of the preceding claims, characterized by a plurality of LCD panels ( 16 ), which can darken independently of each other.

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