JP2008070508A - Liquid crystal device and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal device for preventing orientation from being disturbed by reflection of an ultraviolet ray from a reflection film while processing an orientation layer by light orientation. <P>SOLUTION: The liquid crystal device 100 includes: a pair of substrates 10 and 25 for holding a liquid crystal layer 50; metal wirings 6a and 3a provided on the side of the liquid crystal layer of at least one substrate 10 out of the pair of the substrates; and the orientation layer 16 provided on the side of the liquid crystal layer of the metal wirings 6a and 3a. The orientation layer 16 is subjected to orientation processing with irradiation of the ultraviolet ray UV, and is provided with an ultraviolet absorption film 41 for absorbing the ultraviolet ray on a part overlapped planarly with of the metal wirings 6a and 3a on the side of the liquid crystal layer of the metal wirings 6a and 3a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid crystal device and an electronic apparatus, and more particularly to an alignment processing technique for an alignment film that performs alignment processing by ultraviolet irradiation.

  In the liquid crystal device, the state of the molecular arrangement of the liquid crystal is changed by the action of an electric field or the like, and the change in the optical characteristics accompanying this is used for display. In many cases, the liquid crystal is used in a state where it is sandwiched between two substrates. Here, in order to align the liquid crystal in a specific direction, an alignment process is performed on the inside of the substrate. Usually, the alignment treatment is performed by a method called rubbing, in which a polymer film such as polyimide is provided on a substrate such as glass and is rubbed with a cloth or the like in one direction.

  However, although the rubbing method has an advantage that the manufacturing apparatus is simple, static electricity and dust are generated in the manufacturing process, and thus a cleaning process is required after the alignment treatment. In addition, the TFT element or the like provided in advance on the substrate due to static electricity is destroyed, which causes a reduction in manufacturing yield.

  On the other hand, in recent years, an orientation control technique that does not perform rubbing has attracted attention. In particular, a photo-alignment method that performs alignment treatment by irradiating polarized ultraviolet rays onto an alignment film is actively researched because it is non-contact, does not generate static electricity, and does not require cleaning (for example, patent documents). 1).

The photo-alignment method is a photo-alignment group that develops a photo-alignment function in organic molecules, for example, by photoisomerization of an azo group, by photodimerization of a cinnamoyl group, a coumarin group, a chalcone group, a benzophenone group The thing by photodecomposition of photocrosslinking or polyimide resin has been reported. As photo-alignment film materials using photoisomerization, photodimerization and photo-crosslinking, photo-alignment as described above is applied to the side chain and main chain so that a uniform film can be obtained when coated on a substrate such as glass. A polymer material into which a group is introduced is often used.
JP 2000-356767 A

  However, a liquid crystal device using a photo-alignment film, particularly a reflective or transflective liquid crystal device, has a problem that sufficient contrast cannot be obtained. The following can be considered as the cause. In other words, when an alignment film is formed on the metal wiring and electrodes constituting the circuit section and the alignment film is irradiated with polarized ultraviolet rays, a part of the light is reflected on the surface of the metal wiring and electrodes and again enters the alignment film. A phenomenon occurs. If the polarization direction of light incident again on the alignment film is different from the original polarization direction (the polarization direction of the light when directly illuminating the alignment film), the applied alignment is disturbed, resulting in the alignment film. There is a problem that the initial orientation of the image is disturbed, the orientation becomes insufficient and the orientation becomes non-uniform, and the contrast of the image is lowered. In particular, in a reflective or transflective liquid crystal device, since a reflective film for performing reflective display is formed in a large area in one pixel, disorder of alignment becomes large.

  In order to solve this problem, Patent Document 1 discloses a method of adjusting the inclination angle of the taper portion of the metal wiring, the wiring area of the metal wiring, and the like, and controlling the intensity of light incident again on the alignment film to a predetermined value or less. Proposed. However, this method has a problem that although reflection from a metal wiring having a narrow wiring width can be suppressed, reflection from a reflection film formed in a large area cannot be prevented. Further, even if the taper angle of the metal wiring is controlled, it is not a sufficient measure when the alignment treatment is performed with light incident obliquely on the substrate. For example, it is known that a specific azobenzene derivative can be aligned with a high order parameter by irradiation with non-polarized ultraviolet light, and further, the pretilt angle of the liquid crystal can be controlled by adjusting the incident angle of the ultraviolet light to the substrate. When such an alignment film is used, the light incident angle, that is, the relationship between the taper portion of the metal wiring and the light incident angle changes according to the pretilt angle of the liquid crystal. The formation method of the metal wiring has to be changed and is not practical.

  The present invention has been made in view of such circumstances, and when the alignment film is subjected to alignment treatment by ultraviolet irradiation, it is possible to prevent the alignment from being disturbed by the reflection of ultraviolet rays from the metal wiring or the reflection film. An object is to provide a liquid crystal device. It is another object of the present invention to provide an electronic apparatus that has such a liquid crystal device and has high contrast and excellent display quality.

  In order to solve the above problems, a liquid crystal device of the present invention includes a pair of substrates that hold a liquid crystal layer, a metal wiring provided on the liquid crystal layer side of at least one of the pair of substrates, An alignment film provided on the liquid crystal layer side of the metal wiring, and the alignment film is subjected to an alignment treatment by irradiating ultraviolet rays, and the metal wiring and the plane on the liquid crystal layer side of the metal wiring. The ultraviolet-absorbing film which absorbs the said ultraviolet-ray is provided in the part which overlaps automatically. According to this configuration, since the ultraviolet absorbing film is provided on the liquid crystal layer side of the metal wiring, the alignment film is not disturbed by the ultraviolet rays reflected by the metal wiring when the alignment film is subjected to the alignment treatment with the ultraviolet light. . Therefore, a good alignment state can be realized, and a liquid crystal device with high contrast can be provided.

  In the present invention, it is desirable that the ultraviolet absorbing film is provided so as to cover the surface of the metal wiring on the liquid crystal layer side. According to this configuration, it is possible to reliably prevent the ultraviolet rays from entering the metal wiring as compared with the case where the ultraviolet absorption film is provided in a layer different from the metal wiring. Further, since the configuration of the liquid crystal device can be simplified, the manufacture becomes easy.

  The liquid crystal device of the present invention includes a pair of substrates holding a liquid crystal layer, a light shielding film provided on the liquid crystal layer side of at least one of the pair of substrates, and a liquid crystal layer side of the light shielding film. An alignment film provided, and the alignment film is subjected to alignment treatment by irradiating ultraviolet rays, and the ultraviolet light is applied to a portion of the light shielding film that overlaps the light shielding film in a plane on the liquid crystal layer side. It is characterized in that an ultraviolet absorbing film that absorbs water is provided. According to this configuration, since the ultraviolet absorbing film is provided on the liquid crystal layer side of the light shielding film, the alignment film is not disturbed by the ultraviolet light reflected by the light shielding film when the alignment film is subjected to the alignment treatment with the ultraviolet light. . Therefore, a good alignment state can be realized, and a liquid crystal device with high contrast can be provided.

  In the present invention, the ultraviolet absorbing film is preferably provided so as to cover a surface of the light shielding film on the liquid crystal layer side. According to this configuration, it is possible to reliably prevent the ultraviolet light from entering the light shielding film as compared with the case where the ultraviolet light absorbing film is provided in a layer different from the light shielding film. Further, since the configuration of the liquid crystal device can be simplified, the manufacture becomes easy.

  In the present invention, it is preferable that a plurality of subpixels are provided, and the ultraviolet absorbing film is configured as a film that transmits visible light, and is provided on the entire substrate including the region in the subpixels. According to this configuration, the step of patterning the ultraviolet absorbing film can be omitted, and the manufacture becomes easy.

  The liquid crystal device of the present invention is a liquid crystal device that includes a plurality of sub-pixels and includes a reflective display region that performs reflective display in each sub-pixel, and includes a pair of substrates that hold a liquid crystal layer, A reflective film provided in the reflective display region; and an alignment film provided on the liquid crystal layer side of the reflective film, the alignment film is subjected to an alignment treatment by irradiating ultraviolet rays, An ultraviolet absorbing film that reflects visible light and absorbs the ultraviolet light is provided in a portion overlapping the reflective film on the liquid crystal layer side of the reflective film. According to this configuration, since the ultraviolet absorbing film is provided on the liquid crystal layer side of the reflective film, the alignment film is not disturbed by the ultraviolet light reflected by the reflective film when the alignment film is subjected to the alignment treatment with the ultraviolet light. . Therefore, a good alignment state can be realized, and a liquid crystal device with high contrast can be provided.

  In the present invention, it is preferable that the ultraviolet absorbing film is provided on the entire substrate including a region in the sub-pixel. According to this configuration, the step of patterning the ultraviolet absorbing film can be omitted, and the manufacture becomes easy.

  In the present invention, it is desirable that the ultraviolet absorbing film has a spectral transmittance characteristic that compensates for coloring of light transmitted through the liquid crystal layer. According to this configuration, the color of the reflective display can be adjusted, and the display characteristics can be improved.

  In the present invention, it is desirable that an ultraviolet protective film that transmits visible light and reflects or absorbs ultraviolet light is provided on the opposite side of the display surface side of the pair of substrates from the liquid crystal layer. . According to this configuration, even when the liquid crystal device is used outdoors, the alignment film is not disturbed by the outdoor ultraviolet rays. For example, when an alignment film that performs alignment treatment using cis-trans isomerization of a dichroic dye is used as the alignment film, the alignment characteristics are reversibly changed by re-irradiation with ultraviolet rays. When the alignment film is irradiated with ultraviolet rays, the alignment characteristics of the liquid crystal device may be changed afterwards. However, in the liquid crystal device of the present invention, since outdoor ultraviolet rays do not enter the alignment film in the panel, the alignment characteristics are not changed even when such an alignment film is used, and a stable alignment state is maintained. Is done.

  In the present invention, it is desirable that the ultraviolet protective film has a spectral transmittance characteristic that compensates for coloring of light transmitted through the liquid crystal layer. According to this configuration, the color of the reflective display can be adjusted, and the display characteristics can be improved.

  An electronic apparatus according to the present invention includes the above-described liquid crystal device according to the present invention. According to this configuration, an electronic device with high contrast and excellent display quality is provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, each layer or each member has a different scale so that each layer and each member can be recognized on the drawing. In the following description, the liquid crystal layer side in each component of the liquid crystal device is referred to as the inner side, and the opposite side is referred to as the outer side. An area serving as a minimum unit of image display is referred to as a “sub-pixel area”, and a set of a plurality of sub-pixel areas including each color filter is referred to as a “display area”. In addition, an area in the sub-pixel area where display using light incident from the display surface side of the liquid crystal device is possible is referred to as a “reflective display region”, and from the back side of the liquid crystal device (the side opposite to the display surface). An area capable of display using incident light is referred to as a “transmissive display area”.
[First Embodiment]
FIG. 1 is an equivalent circuit diagram of a plurality of sub-pixel areas arranged in a matrix constituting the image display area of the liquid crystal device 100 according to the first embodiment of the present invention. As shown in the figure, a pixel electrode 9 and a TFT 30 which is a switching element for controlling the pixel electrode 9 are formed in a plurality of subpixel regions of the liquid crystal device 100, and an image signal is supplied thereto. The data line 6 a is electrically connected to the source of the TFT 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. Further, the scanning line 3a is electrically connected to the gate of the TFT 30, and the scanning signals G1, G2,..., Gm are applied to the plurality of scanning lines 3a in a pulse-sequential manner at a predetermined timing. Further, the pixel electrode 9 is electrically connected to the drain of the TFT 30, and the image signals S1, S2,..., Sn supplied from the data line 6a are predetermined by turning on the TFT 30 as a switching element for a predetermined period. It is written at the 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. Reference numeral 3b denotes a capacity line.

  Next, the planar structure of one pixel of the liquid crystal device 100 will be described with reference to FIG. FIG. 2 is a plan configuration diagram of one pixel of the liquid crystal device 100. As shown in the figure, in the pixel region of the liquid crystal device 100, a plurality of data lines 6a extending in the vertical direction in the figure and a plurality of scanning lines 3a extending in the horizontal direction in the figure are wired in a grid pattern. The rectangular area surrounded by the data lines 6a and the scanning lines 3a constitutes the sub-pixels D1 to D3 which are the minimum display units, and a plurality of the sub-pixels are arranged in a matrix so that the entire image display area Is configured. A color filter (coloring layer) of one of the three primary colors is arranged in one subpixel region, and three color filters 22R, 22G, and 22B are included by the three subpixel regions D1 to D3. One pixel region is configured. The colored layers 22R, 22G, and 22B are each formed in a stripe shape extending in the vertical direction in the figure, and are formed across the plurality of sub-pixel regions in the extending direction, and periodically in the horizontal direction in the figure. It is arranged.

  A rectangular pixel electrode 9 having substantially the same planar shape as the sub pixel region is provided at the center of the sub pixel regions D1 to D3. In addition, a TFT 30 that is a pixel switching element is interposed between the pixel electrode 9 and the scanning line 3a and the data line 6a. The TFT 30 includes a semiconductor layer 33, a gate electrode portion 36 provided on the lower layer side of the semiconductor layer 33, a source electrode portion 34 provided on the upper layer side of the semiconductor layer 33, and a drain electrode portion 35. A channel region of the TFT 30 is formed in a region facing the gate electrode portion 36 of the semiconductor layer 33, and a source region and a drain region are formed in the semiconductor layer 33 on both sides thereof.

  The gate electrode portion 36 is formed by branching a part of the scanning line 3a in the extending direction of the data line 6a, and is opposed to the semiconductor layer 33 via an insulating film (not shown) on the tip side. The source electrode portion 34 is formed by branching a part of the data line 6a in the extending direction of the scanning line 3a, and is electrically connected to the source region of the semiconductor layer 33 through a contact hole (not shown). Has been. One end side of the drain electrode portion 35 is electrically connected to the drain region via a contact hole (not shown), and the other end side of the drain electrode portion 35 is directly or via the contact hole C to the pixel electrode 9. And are electrically connected. The TFT 30 is turned on for a predetermined period by the gate signal input via the scanning line 3a, so that the image signal supplied via the data line 6a can be written to the liquid crystal at a predetermined timing. It has become.

  Next, a cross-sectional structure of one pixel of the liquid crystal device 100 will be described with reference to FIG. FIG. 3 is a cross-sectional configuration diagram of one pixel of the liquid crystal device 100. As shown in the figure, the liquid crystal device 100 includes an element substrate 10 and a counter substrate 25 disposed so as to face the element substrate 10. The element substrate 10 and the counter substrate 20 are held at a constant interval by a gap material (not shown), and a cell gap is formed by a space held by the gap material. Nematic liquid crystal is sealed in the cell gap, and the liquid crystal layer 50 is formed by the nematic liquid crystal. A backlight BL having a light source, a reflector, a light guide plate, and the like is installed as illumination means outside the liquid crystal cell corresponding to the outer surface side of the element substrate 10.

  The element substrate 10 has a substrate body 10A made of a translucent material such as quartz or glass as a base. A scanning line 3a is formed on the inner surface side (liquid crystal layer side) of the substrate body 10A, and a gate insulating film 14 is formed to cover the scanning line 3a. A semiconductor layer 33 is formed on the gate insulating film 14 so as to face the scanning line 3a, and a channel region is formed in a portion of the semiconductor layer 33 facing the scanning line 3a (gate electrode portion 36). A source region and a drain region are formed on both sides. A source electrode portion 34 (data line 6a) and a drain electrode portion 35 are stacked in the source region and the drain region of the semiconductor layer 33, respectively, and an ultraviolet absorption film 41 is formed to cover the source electrode portion 34 and the drain electrode portion 35. Further, an interlayer insulating film 15 is formed so as to cover the ultraviolet absorbing film 41. A pixel electrode 9 made of a light-transmitting conductive film such as ITO is formed on the interlayer insulating film 15, and an alignment film 16 is formed so as to cover the pixel electrode 9. In addition, the interlayer insulating film 15 and the ultraviolet absorbing film 41 are formed with a contact hole C leading to the drain electrode portion 35, and the pixel electrode 9 and the drain electrode portion 35 are electrically connected via the contact hole C. Has been. A polarizing plate 17 is disposed on the outer surface side of the substrate body 10A.

  Here, the ultraviolet absorbing film 41 is formed on the entire substrate including the region in the sub-pixel covering the surface (upper surface) and the side surface of the source electrode portion 34 and the drain electrode portion 35 on the liquid crystal layer side. The ultraviolet absorbing film 41 transmits ultraviolet rays that transmit visible light, such as an ultraviolet-absorbing polyester film produced by coating an ultraviolet absorbent on the film, or a titanium oxide thin film that acts to absorb ultraviolet rays. Various thin film members that can be absorbed can be used. FIG. 4 is a diagram illustrating an example of the spectral transmittance characteristics of the ultraviolet absorbing film 41.

  The alignment film 16 is made of an organic thin film having photoreactivity. The alignment film 16 is subjected to an alignment process by irradiating polarized ultraviolet rays or the like, so that the liquid crystal molecules of the liquid crystal layer 50 are aligned substantially horizontally with respect to the substrate surface. As photo-alignment treatment, photo-alignment groups that develop the photo-alignment function in alignment film materials, such as photodimerization of cinnamoyl group, coumarin group, chalcone group, benzophenone group, etc., photoisomerization of azo group, etc. In addition, a photo-decomposed material such as polyimide resin can be used. Further, as disclosed in JP-A-2006-018106, JP-A-2002-250924, JP-A-11-12242, or JP-A-2005-173548, an alignment film material is irradiated by irradiating non-polarized ultraviolet rays. It is also possible to use a known alignment film material for performing rearrangement and photo-alignment treatment.

  The counter substrate 25 has a substrate body 25A made of a translucent material such as quartz or glass as a base. A color filter layer 22 is provided across the reflective display region R and the transmissive display region T on the inner surface side of the substrate body 25A. The color filter layer 22 includes a plurality of types of colored layers 22R, 22G, and 22B having different colors, and a light shielding layer made of a black resin or the like is disposed between the colored layers 22R to 22B as necessary. A phase difference layer 340 is selectively formed on the inner surface side of the color filter layer 22 corresponding to the reflective display region R. A counter electrode 31 is formed on the inner surface side of the retardation layer 340 and the color filter layer 22, and an alignment film 19 is formed to cover the counter electrode 31. A polarizing plate 37 is disposed on the outer surface side of the substrate body 25A.

  The alignment film 19 is made of an organic thin film having photoreactivity. The alignment film 19 is subjected to alignment treatment by irradiating polarized ultraviolet rays or the like, and aligns the liquid crystal molecules of the liquid crystal layer 50 substantially horizontally with respect to the substrate surface. The material of the alignment film 19 and the method of optical alignment treatment are the same as those of the alignment film 16. The alignment direction of the alignment film 19 is orthogonal to the alignment direction of the alignment film 16 in plan view, so that a twisted nematic (TN) liquid crystal layer in which liquid crystal molecules are twisted by 90 ° is formed between the substrates 10 and 25. It has become.

  As described above, according to the liquid crystal device 100 of the present embodiment, since the ultraviolet absorbing film 41 is provided on the liquid crystal layer 50 side of the metal wiring such as the data line 6a, the scanning line 3a, and the capacitor line 3b, the alignment film When the alignment process is performed by irradiating ultraviolet rays from the upper surface side of 16 (the side opposite to the substrate body 10A), the alignment of the alignment film 16 in the sub-pixel is not disturbed by the ultraviolet rays reflected by the metal wiring. Therefore, a good alignment state can be realized in the entire sub-pixel region, and a liquid crystal device with high contrast can be provided.

  In the present embodiment, the transmissive liquid crystal device including only the transmissive display region that impairs the transmissive display in one pixel region has been described. However, the liquid crystal device of the present invention is not necessarily limited to such a device. For example, a reflective liquid crystal device having only a reflective display area for performing reflective display within one pixel area, or a semi-transmissive with a reflective display area for performing reflective display and a transmissive display area for performing transmissive display within one pixel area. The present invention can also be applied to a reflective liquid crystal device. In this embodiment, the TN liquid crystal device has been described. However, the liquid crystal device of the present invention is not necessarily limited to such a liquid crystal device, and may be an ECB liquid crystal device or a lateral electric field liquid crystal device such as an IPS method. The present invention can also be applied.

  In this embodiment, the ultraviolet absorption film 41 is provided on the surface of the metal wiring such as the data line 6a. However, the ultraviolet absorption film 41 is not necessarily provided on the surface of the metal wiring. For example, the ultraviolet absorbing film 41 may be provided on the liquid crystal layer side of the metal wiring via an interlayer insulating film. Further, when a light shielding film (black matrix) is provided in the region between the sub-pixels, it is desirable to provide an ultraviolet absorbing film on the surface of the light shielding film. Thereby, it is possible to prevent the alignment between the sub-pixels from being disturbed by the reflection of ultraviolet rays from the light shielding film. In this case as well, the ultraviolet absorbing film may be provided in a region overlapping the light shielding film on the liquid crystal layer side of the light shielding film, and is not necessarily provided on the surface of the light shielding film. For example, an ultraviolet absorbing film can be provided on the liquid crystal layer side of the light shielding film via an interlayer insulating film or the like. This ultraviolet absorbing film is desirably provided on the entire substrate including the region in the sub-pixel, whereby the step of patterning the ultraviolet absorbing film can be omitted and the manufacture becomes easy.

Further, in the present embodiment, the ultraviolet absorbing film 41 is configured to absorb only ultraviolet light and transmit visible light, but the ultraviolet absorbing film 41 may be configured to absorb both ultraviolet light and visible light. In this case, the ultraviolet absorbing film 41 can be used as a light shielding film (black matrix) by forming the ultraviolet absorbing film 41 in a region excluding the region in the sub-pixel, and a high-contrast liquid crystal device is provided.
[Second Embodiment]
5 and 6 are a plane configuration diagram and a cross-sectional configuration diagram of the liquid crystal device 110 according to the second embodiment of the present invention. Since the basic configuration of the liquid crystal device 110 of the present embodiment is the same as that of the liquid crystal device 100 of the first embodiment, common constituent elements are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 5, in the upper half of the subpixel regions D1 to D3 of the liquid crystal device 110, a reflective film 40 extending in the left-right direction is striped across the three subpixel regions D1 to D3. Is provided. The upper half area in the figure where the reflective film 40 is provided in one sub-pixel area is the reflective display area R, and the lower area in the figure where the reflective film 40 is not provided is the transmissive display area T. Irregular irregularities are provided on the surface of the reflective film 40, and reflected light is scattered by the irregularities, so that reflection from the outside is prevented.

  As shown in FIG. 6, on the inner surface side (liquid crystal layer side) of the substrate body 10 </ b> A of the element substrate 10, the TFT 30 including the scanning line 3 a, the gate insulating film 14, the semiconductor layer 33, the source electrode portion 34 and the drain electrode portion 35. The interlayer insulating film 15 is formed on the gate insulating film 14 so as to cover the semiconductor layer 33, the source electrode portion 34, and the drain electrode portion 35. The interlayer insulating film 15 includes a first interlayer insulating film 15a and a second interlayer insulating film 15b. On the surface of the second interlayer insulating film 15b, an uneven portion 15A having a random uneven shape is formed corresponding to the reflective display region R. An ultraviolet absorbing film 42 and a reflective film 40 are formed on the uneven portion 15A, and a random uneven surface corresponding to the underlying uneven portion 15A is formed on the surface of the reflective film 40. On the interlayer insulating film 15, a pixel electrode 9 made of a light-transmitting conductive film such as ITO is formed so as to cover the ultraviolet absorption film 42. Further, the pixel electrode 9 and the ultraviolet absorption film 42 are covered and oriented. A film 16 is formed. Further, a contact hole C leading to the drain electrode portion 35 is formed in the interlayer insulating film 15, and the pixel electrode 9 and the drain electrode portion 35 are electrically connected through the contact hole C.

  Here, the ultraviolet absorbing film 42 is formed on the entire substrate including the region in the sub-pixel so as to cover the uneven portion 15A. Examples of the ultraviolet absorbing film 42 are ultraviolet ray absorbing polyester film manufactured by coating an ultraviolet absorbent on the film, and a titanium oxide thin film having an action of absorbing ultraviolet rays. Various thin film members that can be absorbed can be used. The spectral transmittance characteristics of the ultraviolet absorbing film 42 are the same as those shown in FIG.

According to the liquid crystal device 110, since the ultraviolet absorption film 42 is provided on the liquid crystal layer 50 side of the reflective film 40, the alignment is performed by irradiating ultraviolet rays from the upper surface side (the side opposite to the substrate body 10A) of the alignment film 16. When the treatment is performed, the orientation of the alignment film 16 is not disturbed by the ultraviolet rays reflected by the reflective film 40. Further, since the ultraviolet absorbing film 42 is provided on the entire substrate, the alignment of the alignment film 16 in the sub-pixel is not disturbed by reflection from the metal wiring such as the data line 6a, the scanning line 3a, and the capacitor line 3b. Therefore, a good alignment state can be realized in the entire sub-pixel region, and a liquid crystal device with high contrast can be provided. Moreover, when the thing with the spectral transmittance characteristic which compensates the coloring of the light which permeate | transmitted the liquid-crystal layer 50 is used as the ultraviolet-ray absorption film | membrane 42, the color of a display can be adjusted and a display characteristic can be improved.
[Third Embodiment]
FIG. 7 is a cross-sectional configuration diagram of one pixel of the liquid crystal device 120 according to the third embodiment of the present invention. The basic structure of the liquid crystal device 120 shown in the figure is the same as that of the liquid crystal device 100 of the first embodiment. The difference is that the alignment films 16 and 19 are protected from the ultraviolet rays on the display side of the liquid crystal device 120 from the outdoor ultraviolet rays. The ultraviolet protective film 38 is provided. In the liquid crystal device 120, an ultraviolet protective film 38 that transmits visible light and reflects or absorbs ultraviolet light is provided on the surface of the counter substrate 25 opposite to the liquid crystal layer 50 of the substrate body 25 </ b> A. The ultraviolet protective film 38 reflects or absorbs ultraviolet light having a wavelength used for the alignment treatment of the alignment films 16 and 19. FIG. 8 shows an example of the spectral transmittance characteristics of the ultraviolet protective film 38.

According to the liquid crystal device 120, the alignment films 16 and 19 are protected from ultraviolet rays by the ultraviolet protective film 38. Therefore, even when the liquid crystal device 120 is used outdoors, the alignment films 16 and 19 are disturbed by the outdoor ultraviolet rays. It will not be done. For example, when an alignment film that performs alignment treatment using cis-trans isomerization of a dichroic dye is used as the alignment films 16 and 19, the alignment characteristics reversibly change due to re-irradiation with ultraviolet rays, so that When the alignment films 16 and 19 are irradiated with ultraviolet light by natural light, the alignment characteristics of the liquid crystal device may change afterwards. However, in the liquid crystal device 120 of this embodiment, since outdoor ultraviolet rays are not incident on the alignment films 16 and 19 in the panel, the alignment characteristics are not changed even when such an alignment film is used, and stable. The aligned state is maintained. Further, when the ultraviolet protective film 38 having a spectral transmittance characteristic that compensates for coloring of the light transmitted through the liquid crystal layer 50 is used, the color of the reflective display can be adjusted and the display characteristics can be improved. .
[Electronics]
FIG. 9 is a perspective view showing an example of an electronic apparatus according to the present invention. A cellular phone 1300 in the figure includes the liquid crystal device of the present invention as a small-sized display portion 1301, and includes a plurality of operation buttons 1302, an earpiece 1303, and a mouthpiece 1304. The display device of each of the above embodiments is not limited to the mobile phone, but is an electronic book, a personal computer, a digital still camera, a liquid crystal television, a viewfinder type or a monitor direct view type video tape recorder, a car navigation device, a pager, and an electronic notebook. , Calculators, word processors, workstations, video phones, POS terminals, devices equipped with touch panels, etc., and can be suitably used as image display means. In any electronic device, it is bright, has high contrast, and has a wide viewing angle. Image display is possible.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

1 is a circuit configuration diagram of a liquid crystal device according to a first embodiment of the present invention. It is a plane block diagram of 1 pixel of the liquid crystal device. It is a cross-sectional block diagram of 1 pixel of the liquid crystal device. It is an example of the spectral transmittance characteristic of the reflecting film with which the liquid crystal device is provided. It is a plane block diagram of 1 pixel of the liquid crystal device which concerns on 2nd Embodiment of this invention. It is a cross-sectional block diagram of 1 pixel of the liquid crystal device. It is a section lineblock diagram of one pixel of a liquid crystal device concerning a 3rd embodiment of the present invention. It is an example of the spectral transmittance characteristic of the ultraviolet protective film with which the same liquid crystal device is provided. 1 is a perspective configuration diagram of a mobile phone which is an example of an electronic apparatus of the present invention.

Explanation of symbols

3a ... scanning line (metal wiring), 3b ... capacitance line (metal wiring), 6a ... data line (metal wiring), 10 ... element substrate, 16, 19 ... alignment film, 25 ... counter substrate, 38 ... UV protective film, DESCRIPTION OF SYMBOLS 40 ... Reflective film, 41, 42 ... UV absorption film, 50 ... Liquid crystal layer, 100, 110, 120 ... Liquid crystal device, 1300 ... Mobile phone (electronic device), R ... Reflective display area, T ... Transparent display area

Claims (11)

A pair of substrates holding a liquid crystal layer;
Metal wiring provided on the liquid crystal layer side of at least one of the pair of substrates;
An alignment film provided on the liquid crystal layer side of the metal wiring,
The alignment film is subjected to an alignment treatment by irradiating ultraviolet rays,
A liquid crystal device, wherein an ultraviolet absorbing film that absorbs the ultraviolet rays is provided in a portion overlapping the metal wiring on the liquid crystal layer side of the metal wiring.   The liquid crystal device according to claim 1, wherein the ultraviolet absorbing film is provided so as to cover a surface of the metal wiring on the liquid crystal layer side. A pair of substrates holding a liquid crystal layer;
A light-shielding film provided on the liquid crystal layer side of at least one of the pair of substrates;
An alignment film provided on the liquid crystal layer side of the light shielding film,
The alignment film is subjected to an alignment treatment by irradiating ultraviolet rays,
A liquid crystal device, wherein an ultraviolet absorbing film that absorbs the ultraviolet rays is provided in a portion overlapping the light shielding film on the liquid crystal layer side of the light shielding film.   The liquid crystal device according to claim 3, wherein the ultraviolet absorbing film is provided so as to cover a surface of the light shielding film on the liquid crystal layer side. A plurality of sub-pixels,
The ultraviolet absorbing film is configured as a film that transmits visible light,
The liquid crystal device according to claim 1, wherein the liquid crystal device is provided over the entire substrate including a region in the sub-pixel. A liquid crystal device that includes a plurality of subpixels and includes a reflective display region that performs reflective display in each subpixel,
A pair of substrates holding a liquid crystal layer;
A reflective film provided in the reflective display region in the sub-pixel;
An alignment film provided on the liquid crystal layer side of the reflective film,
The alignment film is subjected to an alignment treatment by irradiating ultraviolet rays,
A liquid crystal device, wherein an ultraviolet absorbing film that reflects visible light and absorbs the ultraviolet light is provided in a portion overlapping the reflective film on the liquid crystal layer side of the reflective film.   The liquid crystal device according to claim 6, wherein the ultraviolet absorbing film is provided on the entire substrate including a region in the sub-pixel.   The liquid crystal device according to claim 6, wherein the ultraviolet absorbing film has a spectral transmittance characteristic that compensates for coloring of light transmitted through the liquid crystal layer.   2. An ultraviolet protective film that transmits visible light and reflects or absorbs ultraviolet rays is provided on the opposite side of the substrate on the display surface side of the pair of substrates from the liquid crystal layer. The liquid crystal device according to any one of items 8 to 8.   The liquid crystal device according to claim 9, wherein the ultraviolet protective film has a spectral transmittance characteristic that compensates for coloring of light transmitted through the liquid crystal layer.   An electronic apparatus comprising the liquid crystal device according to claim 1.

Images