JP2007137986A - Liquid crystal composition, method for producing liquid crystal composition, liquid crystal device and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal composition stabilizing liquid crystal molecules even when the liquid crystal molecules are activated by radical formation, etc., resulting from receiving of irradiation of light and preventing or suppressing an intermolecular reaction or a reaction with other materials and to provide a method for producing the same. <P>SOLUTION: The liquid crystal composition comprises a liquid crystal material and a radical scavenger. A liquid crystal layer 50 of a liquid crystal device is composed of the liquid crystal composition. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid crystal composition, a method for producing the liquid crystal composition, a liquid crystal device, and a projector.

Conventionally, there are liquid crystal compositions mainly composed of a liquid crystal compound containing a halogen element such as fluorine element. Since such a liquid crystal composition has a low viscosity and a high specific resistance value, it is particularly suitable for a liquid crystal device for driving an active matrix. Specifically, for a liquid crystal device in which the liquid crystal layer is sandwiched between a pair of substrates, the liquid crystal layer is composed of the liquid crystal composition, and the liquid crystal device is mounted on a liquid crystal projector. It is used as a direct-view display device mounted on a mobile phone or the like (see, for example, Patent Document 1).
JP 2005-49894 A

  However, a liquid crystal composition mainly composed of a liquid crystal compound containing a halogen element such as fluorine element is radicalized by, for example, excessive light irradiation (particularly, short-wavelength blue light irradiation), causing a reaction between molecules, Reaction between the two. When such a reaction occurs, a liquid crystal alignment defect occurs, and a display defect may occur in the liquid crystal projector or the direct-view display device. Under the situation where the brightness and the size are reduced and the light intensity per unit area is increasing as in the case of the liquid crystal projector, the problem of the display defect due to the radicalization of the liquid crystal molecules is more serious. It has become a thing.

  The present invention has been made in view of the above problems, and even when liquid crystal molecules are activated by radicalization or the like due to light irradiation, the liquid crystal molecules are stabilized, and intermolecular reactions and other materials can be obtained. An object of the present invention is to provide a liquid crystal composition capable of preventing or suppressing the reaction and a method for producing the same. Another object of the present invention is to provide a liquid crystal device in which alignment defects of liquid crystals are hardly caused by using the liquid crystal composition, and thus display defects are hardly caused, and a projector including the liquid crystal device.

  In order to solve the above problems, a liquid crystal composition of the present invention includes a liquid crystal material, a radical scavenger that stabilizes the radicalized liquid crystal molecules when the liquid crystal molecules constituting the liquid crystal material are radicalized, It is characterized by comprising. Such a liquid crystal composition can stabilize the liquid crystal molecules by capturing the radicals even when the liquid crystal molecules constituting the liquid crystal material are radicalized by, for example, light irradiation. As a result, a problem that a reaction occurs between liquid crystal molecules or a reaction occurs between molecules constituting other materials hardly occurs.

It is particularly preferable to use fullerene as the radical scavenger. Fullerene is preferably dispersed in the liquid crystal material and has a strong trapping action, so that the stabilizing effect of the liquid crystal material can be more remarkably exhibited. In addition, since fullerene exhibits a trapping action in a stable state, the fullerene hardly causes a problem in the orientation of the liquid crystal material. Of the fullerenes, C ₆₀ is particularly preferred. This is because the dispersibility in the liquid crystal material is particularly high.

  Further, the liquid crystal composition of the present invention may contain an organic component having a conjugated molecular structure in addition to the liquid crystal material and the radical scavenger. In addition, the organic component having a cyclic molecular structure may be included, and the organic component having the cyclic molecular structure may have a conjugated molecular structure. Such an organic component contributes as a dispersion medium between the liquid crystal material and the radical scavenger, and the dispersibility of the radical scavenger in the liquid crystal material is further improved.

  Next, in order to solve the above-mentioned problem, a method for producing a liquid crystal composition of the present invention is a method for producing a liquid crystal composition comprising a liquid crystal material and a radical scavenger, wherein the radical scavenger is dispersed in an organic liquid. Or a step of dissolving, and a step of mixing a liquid crystal material with an organic liquid in which the radical scavenger is dispersed or dissolved. By employing such a production method, the radical scavenger can be suitably dispersed in the liquid crystal material. As a result, problems such as occurrence of coloring due to aggregation of the radical scavenger and insufficient capture are hardly caused.

  Next, in order to solve the above problems, a liquid crystal device of the present invention is a liquid crystal device having a configuration in which a liquid crystal layer is sandwiched between a pair of substrates facing each other, wherein the liquid crystal layer is the liquid crystal composition described above. It is characterized by providing. According to such a liquid crystal device, even when high-energy light is incident on the liquid crystal layer and the liquid crystal molecules in the liquid crystal layer are radicalized, the radicalized liquid crystal molecules can be stabilized by the radical scavenger. Therefore, the reaction between liquid crystal molecules and the reaction with the alignment film are unlikely to occur, and the alignment defect associated therewith is unlikely to occur. As a result, display defects based on liquid crystal alignment defects are less likely to occur.

  Next, in order to solve the above-described problem, a projector according to the present invention includes a light source, a light modulation unit including a liquid crystal device that modulates light from the light source, and a projection that projects light modulated by the light modulation unit. The liquid crystal device includes a configuration in which a liquid crystal layer is sandwiched between a pair of substrates facing each other, and the liquid crystal layer includes the liquid crystal composition described above. According to such a projector, even when the luminance of the light source is increased, the liquid crystal device serving as the light modulation means contains the radical scavenger, so that display failure is unlikely to occur. That is, even when high energy light is incident on the liquid crystal layer of the liquid crystal device and the liquid crystal molecules in the liquid crystal layer are radicalized, the liquid crystal molecules radicalized by the radical scavenger can be stabilized. Reaction between molecules and reaction with the alignment film are unlikely to occur, and alignment defects associated therewith are unlikely to occur. As a result, display defects based on liquid crystal alignment defects are less likely to occur.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In addition, in each figure, in order to make each layer and each member the size which can be recognized on drawing, the scale is varied for every layer and each member.

[Liquid Crystal Device]
The liquid crystal device of the present embodiment described below is an active matrix transmissive liquid crystal device using a TFT (Thin-Film Transistor) element as a switching element. Further, the liquid crystal device of the present embodiment has a liquid crystal layer provided with the liquid crystal composition according to the present invention.

  FIG. 1 is an equivalent circuit diagram of switching elements, signal lines, and the like in a plurality of pixels arranged in a matrix that constitutes an image display region of the transmissive liquid crystal device of this embodiment. FIG. 2 is a plan view showing the structure of a plurality of pixel groups adjacent to each other on a TFT array substrate on which data lines, scanning lines, pixel electrodes and the like are formed. FIG. 3 is a cross-sectional view of the element region of the transmissive liquid crystal device of this embodiment, and is a cross-sectional view taken along the line A-A ′ of FIG. 2. FIG. 4 is a cross-sectional view schematically showing a plurality of pixel regions in the transmissive liquid crystal device of this embodiment. 3 and 4, the upper side in the drawing is the light incident side, and the lower side in the drawing is the viewing side (observer side).

  In the transmissive liquid crystal device according to the present embodiment, as shown in FIG. 1, a plurality of pixels arranged in a matrix that constitutes an image display region are subjected to energization control for the pixel electrode 9 and the pixel electrode 9. TFT elements 30 as the switching elements are formed, and the data line 6 a to which an image signal is supplied is electrically connected to the source of the TFT element 30. Image signals S1, S2,..., Sn to be written to the data line 6a are supplied line-sequentially in this order, or are supplied for each group to a plurality of adjacent data lines 6a.

  In addition, the scanning line 3a is electrically connected to the gate of the TFT element 30, and scanning signals G1, G2,..., Gm are applied to the plurality of scanning lines 3a in a pulse-sequential manner at predetermined timing. The Further, the pixel electrode 9 is electrically connected to the drain of the TFT element 30, and the image signal S1, S2,... Supplied from the data line 6a is turned on by turning on the TFT element 30 as a switching element for a certain period. , Sn is written at a predetermined timing.

  A predetermined level of image signals S1, S2,..., Sn written to the liquid crystal via the pixel electrode 9 is held for a certain period with the common electrode described later. The liquid crystal modulates light by changing the orientation and order of the molecular assembly according to the applied voltage level, thereby enabling gradation display. Here, in order to prevent the held image signal from leaking, a storage capacitor 70 is added in parallel with the liquid crystal capacitor formed between the pixel electrode 9 and the common electrode.

  Next, the planar structure of the transmissive liquid crystal device of this embodiment will be described with reference to FIG. As shown in FIG. 2, a rectangular pixel electrode 9 (outlined by a dotted line portion 9A) made of a transparent conductive material such as indium tin oxide (hereinafter abbreviated as “ITO”) is formed on the TFT array substrate. A plurality of pixels are provided in a matrix, and data lines 6 a, scanning lines 3 a, and capacitor lines 3 b are provided along the vertical and horizontal boundaries of the pixel electrode 9. In the present embodiment, each pixel electrode 9 and the area where the data line 6a, the scanning line 3a, the capacitor line 3b, etc. are arranged so as to surround each pixel electrode 9 are pixels, and are arranged in a matrix. The display can be displayed for each pixel.

  The data line 6a is electrically connected to a source region (described later) through a contact hole 5 in the semiconductor layer 1a made of, for example, a polysilicon film constituting the TFT element 30, and the pixel electrode 9 is connected to the semiconductor layer 1a. Among these, it is electrically connected to a drain region described later via a contact hole 8. In addition, the scanning line 3a is disposed so as to face a channel region (a region with a diagonal line rising to the left in the figure), which will be described later, in the semiconductor layer 1a, and the scanning line 3a serves as a gate electrode at a portion facing the channel region. Function.

  The capacitor line 3b is formed from a main line portion extending in a substantially straight line along the scanning line 3a (that is, a first region formed along the scanning line 3a in a plan view) and a portion intersecting the data line 6a. And a protruding portion (that is, a second region extending along the data line 6 a when viewed in a plan view) protruding toward the previous stage (upward in the drawing) along the data line 6 a. In FIG. 2, a plurality of first light shielding films 11 a are provided in a region indicated by a diagonal line rising to the right.

  Next, a cross-sectional structure of the transmissive liquid crystal device of this embodiment will be described with reference to FIGS. In FIG. 4, some components such as switching elements are omitted in view of the visibility of the drawing. As shown in FIGS. 3 and 4, in the transmissive liquid crystal device of this embodiment, a liquid crystal layer 50 is sandwiched between the TFT array substrate 10 and a counter substrate 20 disposed to face the TFT array substrate 10. The TFT array substrate 10 is mainly composed of a substrate body 10A made of a light-transmitting material such as quartz, a pixel electrode 9 formed on the surface of the liquid crystal layer 50, and an alignment film 40. The counter substrate 20 is made of glass or The substrate main body 20A made of a translucent material such as quartz, the common electrode 21 formed on the liquid crystal layer 50 side surface, and the alignment film 60 are mainly configured.

  As shown in FIG. 3, in the TFT array substrate 10, pixel electrodes 9 are provided on the surface of the substrate body 10 </ b> A on the liquid crystal layer 50 side, and each pixel electrode 9 is controlled to be switched to a position adjacent to each pixel electrode 9. A pixel switching TFT element 30 is provided. The pixel switching TFT element 30 has an LDD (Lightly Doped Drain) structure, and includes a scanning line 3a, a channel region 1a ′ of the semiconductor layer 1a in which a channel is formed by an electric field from the scanning line 3a, and the scanning line 3a. A gate insulating film 2 that insulates the semiconductor layer 1a, a data line 6a, a low concentration source region 1b and a low concentration drain region 1c of the semiconductor layer 1a, and a high concentration source region 1d and a high concentration drain region 1e of the semiconductor layer 1a. ing.

  Further, a second contact hole 5 leading to the high concentration source region 1d and a contact hole 8 leading to the high concentration drain region 1e are formed on the substrate main body 10A including the scanning line 3a and the gate insulating film 2. An interlayer insulating film 4 is formed. That is, the data line 6 a is electrically connected to the high concentration source region 1 d through the contact hole 5 that penetrates the second interlayer insulating film 4. Further, on the data line 6a and the second interlayer insulating film 4, a third interlayer insulating film 7 having a contact hole 8 leading to the high concentration drain region 1e is formed. That is, the high concentration drain region 1 e is electrically connected to the pixel electrode 9 through the contact hole 8 that penetrates the second interlayer insulating film 4 and the third interlayer insulating film 7.

  In the present embodiment, the gate insulating film 2 is extended from a position facing the scanning line 3a and used as a dielectric film, the semiconductor film 1a is extended to form the first storage capacitor electrode 1f, and further opposed thereto. The storage capacitor 70 is configured by using a part of the capacitor line 3b to be a second storage capacitor electrode.

  Further, on the surface of the TFT array substrate 10 on the liquid crystal layer 50 side of the substrate main body 10A, the region where the pixel switching TFT elements 30 are formed is transmitted through the TFT array substrate 10, and the lower surface (TFT) of the TFT array substrate 10 is illustrated. The return light reflected by the interface between the array substrate 10 and air and returning to the liquid crystal layer 50 side is prevented from entering at least the channel region 1a ′ and the low concentration source / drain regions 1b and 1c of the semiconductor layer 1a. For this purpose, a first light shielding film 11a is provided. Further, a first interlayer insulation for electrically insulating the semiconductor layer 1a constituting the pixel switching TFT element 30 from the first light shielding film 11a is provided between the first light shielding film 11a and the pixel switching TFT element 30. A film 12 is formed. Further, as shown in FIG. 2, in addition to providing the first light-shielding film 11a on the TFT array substrate 10, the first light-shielding film 11a is electrically connected to the capacitor line 3b at the preceding stage or the subsequent stage through the contact hole 13. Configured to connect to.

  An alignment film 40 for controlling the alignment of the liquid crystal molecules in the liquid crystal layer 50 when no voltage is applied is provided on the outermost surface of the TFT array substrate 10 on the liquid crystal layer 50 side, that is, on the pixel electrode 9 and the third interlayer insulating film 7. Is formed.

  On the other hand, the counter substrate 20 has a surface on the liquid crystal layer 50 side of the substrate body 20A, which is a region facing the formation region of the data line 6a, the scanning line 3a, and the pixel switching TFT element 30, that is, an opening region of each pixel unit. The second light-shielding film 23 for preventing incident light from entering the channel region 1a ′, the low-concentration source region 1b, and the low-concentration drain region 1c of the semiconductor layer 1a of the pixel switching TFT element 30 in the other regions. Is provided. Further, a common electrode 21 made of ITO or the like is formed on almost the entire surface of the substrate body 20A on which the second light-shielding film 23 is formed, and no voltage is applied to the liquid crystal layer 50 side. An alignment film 60 for controlling the alignment of the liquid crystal molecules in the liquid crystal layer 50 during heating is formed.

  Next, the liquid crystal layer 50 is composed of a liquid crystal composition including a liquid crystal material and a radical scavenger. Specifically, the liquid crystal material is mainly composed of an organic component containing a halogen element and forms a liquid crystal phase. As the radical scavenger, the liquid crystal molecules are radicalized by light irradiation. In some cases, those that capture the radical and stabilize the liquid crystal molecules were used.

As an example of the liquid crystal material, for example, a liquid crystal mixture for TFT (manufactured by Merck & Co., MLC-6849-00) can be used. On the other hand, To illustrate a radical scavenger, for example fullerenes, specifically 5-membered ring, a 6-membered ring ones, yet those specifically represented by _{C 60,} Other _{C 70,} C _{76, C 78} , C ₈₀ , C ₈₂ , C ₈₄ , C ₈₆ , C ₈₈ , C ₉₀ , C ₉₂ , C ₉₄ , C _{96 and the} like can be used. When the liquid crystal layer 50 is composed of a liquid crystal composition in which such a radical scavenger is dispersed in a liquid crystal material, even when high energy light is incident on the liquid crystal layer 50 and the liquid crystal molecules are radicalized, the radical scavenger Due to the action, the liquid crystal molecules do not react between molecules or react with the alignment films 40, 60, etc., and the alignment disorder hardly occurs in the liquid crystal layer 50. As a result, display defects due to radicalization of liquid crystal molecules hardly occur in the liquid crystal device, and a highly reliable display can be provided.

Of the fullerenes used as radical scavengers, C ₆₀ is most preferably used. This is because the dispersibility with respect to the liquid crystal material is particularly high and the radical scavenging action can be surely exhibited. Moreover, the content rate of the radical scavenger in a liquid-crystal composition can be 0.01 wt%-0.1 wt%. When the amount is less than 0.01 wt%, the trapping action may be hardly exhibited. On the other hand, when the amount exceeds 0.1 wt%, the transmittance of the liquid crystal layer 50 may be reduced and display characteristics may be affected.

  Further, the liquid crystal composition constituting the liquid crystal layer 50 contains an organic dispersion medium in addition to the liquid crystal material and the radical scavenger. This dispersion medium is for dispersing a radical scavenger in a liquid crystal material. For example, an organic liquid having a conjugated molecular structure (organic component) or an organic liquid having a cyclic molecular structure (organic component) can be used. .

  Examples of the organic liquid having a conjugated molecular structure include octatriene, octadiene, benzene, toluene, and xylene. Examples of the organic liquid having a cyclic molecular structure include tetrahydrofuran, cyclohexane, crown ether, cyclodextrin, benzene, toluene, Xylene or the like can be used.

  The liquid crystal composition constituting the liquid crystal layer 50 as described above can be manufactured by the following method. That is, first, a radical scavenger such as fullerene is mixed with the organic liquid to form a mixed liquid of 10 wt%, and the radical scavenger is sufficiently dispersed by stirring. Thereafter, the liquid crystal material and the mixed liquid are mixed (1 vol% of the mixed liquid with respect to the liquid crystal material), and this is irradiated with ultrasonic waves of 40 KHz. Then, since an excess radical scavenger precipitates, it can be removed and a supernatant liquid crystal composition can be obtained.

Hereinafter, the results of the durability acceleration test using the liquid crystal device will be described.
Specifically, with respect to durability when a Hg lamp having a wavelength of 385 nm is used as a light source and the light is irradiated to a liquid crystal device (Example) containing 0.1 wt% of a radical scavenger with respect to the liquid crystal material, light When the irradiation was continued, the irradiation time at which the alignment disorder started to occur was tested. As the alignment films 40 and 60, a polyimide film that has been rubbed is used, and a liquid crystal device (comparative example) in which a liquid crystal material that does not contain a radical scavenger is used as a comparison is also subjected to the same durability test. It was. As a result, the durability of the liquid crystal device of the comparative example was 2 minutes, whereas the durability of the liquid crystal device of the example was improved to 6 minutes.

  The liquid crystal device as one embodiment of the present invention has been described above, but the present invention is not limited to this, and is not limited to the wording of each claim unless departing from the scope described in each claim. In addition, it is possible to appropriately add improvements based on the knowledge that a person skilled in the art normally has, and to the extent that those skilled in the art can easily replace them. For example, in the present embodiment, only an active matrix liquid crystal device using TFT elements has been described. However, the present invention is not limited to this, and the active matrix liquid crystal using TFD (Thin-Film Diode) elements is used. The present invention can also be applied to a device, a passive matrix liquid crystal device, and the like. In the present embodiment, only the transmissive liquid crystal device has been described. However, the present invention is not limited to this, and can be applied to a reflective or transflective liquid crystal device. Thus, the present invention can be applied to a liquid crystal device having any structure.

[Electronics]
Examples of electronic devices including the liquid crystal device of the above embodiment will be described.
FIG. 5A is a perspective view showing an example of a mobile phone. In FIG. 5A, reference numeral 500 denotes a mobile phone body, and reference numeral 501 denotes a liquid crystal display unit using the liquid crystal device of the above embodiment.

  FIG. 5B is a perspective view showing an example of a portable information processing apparatus such as a word processor or a personal computer. In FIG. 5B, reference numeral 600 denotes an information processing apparatus, reference numeral 601 denotes an input unit such as a keyboard, reference numeral 603 denotes an information processing apparatus body, and reference numeral 602 denotes a liquid crystal display unit using the liquid crystal device of the above embodiment. .

  FIG. 5C is a perspective view showing an example of a wristwatch type electronic device. In FIG. 5C, reference numeral 700 denotes a watch body, and reference numeral 701 denotes a liquid crystal display unit using the liquid crystal device of the above embodiment.

  As described above, since the electronic apparatus shown in FIG. 5 uses the above-described liquid crystal device as an example of the present invention for the display portion, for example, alignment defects in the liquid crystal layer due to excessive light irradiation are hardly generated, and the display quality is reduced. Can be maintained over a long period of time.

[Projection type display device]
Next, a configuration of a projection display device (projector) including the liquid crystal device of the above embodiment as a light modulation unit will be described with reference to FIG. FIG. 6 is a schematic configuration diagram showing a main part of a projection display device using the liquid crystal device of the above embodiment as a light modulation device. 6, 810 is a light source, 813 and 814 are dichroic mirrors, 815, 816 and 817 are reflection mirrors, 818 is an incident lens, 819 is a relay lens, 820 is an exit lens, 822, 823 and 824 are liquid crystal light modulators, Reference numeral 825 denotes a cross dichroic prism, and reference numeral 826 denotes a projection lens.

  The light source 810 includes a lamp 811 such as a metal halide and a reflector 812 that reflects the light of the lamp. The dichroic mirror 813 that reflects blue light and green light transmits red light out of the light flux from the light source 810 and reflects blue light and green light. The transmitted red light is reflected by the reflection mirror 817 and is incident on the red light liquid crystal light modulation device 822 including the liquid crystal device as an example of the present invention.

  On the other hand, of the color light reflected by the dichroic mirror 813, the green light is reflected by the dichroic mirror 814 that reflects green light, and enters the liquid crystal light modulator 823 for green light that includes the above-described liquid crystal device according to the present invention. . Note that the blue light also passes through the second dichroic mirror 814. For blue light, light guide means 821 comprising a relay lens system including an incident lens 818, a relay lens 819, and an exit lens 820 is provided in order to compensate for the difference in optical path length from green light and red light. Through this, the blue light is incident on the liquid crystal light modulation device 824 for blue light provided with the liquid crystal device as an example of the present invention.

  The three color lights modulated by the respective light modulation devices are incident on the cross dichroic prism 825. In this prism, four right-angle prisms are bonded together, and a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in a cross shape on the inner surface. These dielectric multilayer films combine the three color lights to form light representing a color image. The synthesized light is projected onto the screen 827 by the projection lens 826 which is a projection optical system, and the image is enlarged and displayed.

  Since the projection display device having the above-described structure includes the above-described liquid crystal device as an example of the present invention, for example, alignment failure due to excessive light irradiation hardly occurs, and display quality is maintained over a long period of time. It becomes a display device capable of. Especially, since the liquid crystal light modulation device 824 for blue light is irradiated with light having a short wavelength, the effect of suppressing the occurrence of display defects due to light irradiation can be most remarkable by adopting the liquid crystal device of this embodiment.

1 is an equivalent circuit diagram of switching elements, signal lines, etc. in a liquid crystal device according to an embodiment of the present invention. FIG. 2 is a plan view showing a structure of a plurality of pixel groups adjacent to each other on a TFT array substrate in the liquid crystal device of FIG. 1. Sectional drawing which shows the element structure about the liquid crystal device of FIG. FIG. 2 is a cross-sectional view schematically showing a configuration of a pixel region of the liquid crystal device of FIG. FIG. 14 is a perspective view illustrating some examples of the electronic apparatus according to the invention. The figure which shows an example about the projection type display apparatus which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... TFT array substrate, 20 ... Counter substrate, 10A, 20A ... Substrate body, 50 ... Liquid crystal layer

Claims (8)

Liquid crystal material,
A liquid crystal composition comprising: a radical scavenger that stabilizes the radicalized liquid crystal molecules when the liquid crystal molecules constituting the liquid crystal material are radicalized.   The liquid crystal composition according to claim 1, wherein the radical scavenger is fullerene. The liquid crystal composition according to claim 2, wherein the fullerene is C _60.   The liquid crystal composition according to any one of claims 1 to 3, further comprising an organic component having a conjugated molecular structure in addition to the liquid crystal material and the radical scavenger.   5. The liquid crystal composition according to claim 1, further comprising an organic component having a cyclic molecular structure in addition to the liquid crystal material and the radical scavenger. A method for producing a liquid crystal composition comprising a liquid crystal material and a radical scavenger,
Dispersing or dissolving a radical scavenger in an organic liquid;
A method for producing a liquid crystal composition comprising the step of mixing an organic liquid in which the radical scavenger is dispersed or dissolved and a liquid crystal material. A liquid crystal device having a configuration in which a liquid crystal layer is sandwiched between a pair of substrates facing each other,
A liquid crystal device, wherein the liquid crystal layer comprises the liquid crystal composition according to claim 1. A projector comprising: a light source; a light modulation unit including a liquid crystal device that modulates light from the light source; and a projection unit that projects light modulated by the light modulation unit.
The liquid crystal device includes a configuration in which a liquid crystal layer is sandwiched between a pair of substrates facing each other, and the liquid crystal layer includes the liquid crystal composition according to any one of claims 1 to 5. projector.

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