JP2008268632A - Liquid crystal device and electronic device - Google Patents

Abstract

An object of the present invention is to provide a liquid crystal device capable of preventing a disturbance of an electric field caused by unevenness of a surface of a reflective layer and performing a good reflective display.
A liquid crystal device according to the present invention includes a pair of substrates that sandwich a liquid crystal layer, and a first electrode and a first electrode on the liquid crystal layer side of one of the pair of substrates. The second electrode 19 is provided, and the liquid crystal layer 50 is driven by an electric field generated between the first electrode 9 and the second electrode 19, and the other substrate 10 of the pair of substrates is driven. A reflective layer 29 is provided on the liquid crystal layer 50 side, and irregularities are provided on the surface of the reflective layer 29.
[Selection] Figure 3

Description

  The present invention relates to a liquid crystal device and an electronic apparatus.

As one form of the liquid crystal device, there is known a method of controlling the alignment of liquid crystal molecules by applying an electric field in the direction of the substrate surface to the liquid crystal layer (hereinafter referred to as a transverse electric field method), which generates the electric field. There are known what is called an IPS (In-Plane Switching) system, an FFS (Fringe-Field Switching) system, etc., depending on the form of the electrodes. For example, Patent Document 1 below discloses a transflective liquid crystal device of a transverse electric field method (FFS method) in which comb-like electrodes are provided on upper and lower layers via a dielectric film.
JP 2005-338256 A

  In a transflective liquid crystal device, in order to obtain a good reflective display, a resin layer having irregularities formed between the reflective layer and the substrate is provided, and the light scattering property is imparted to the reflective layer by the resin layer. It has been known. However, when irregularities are formed on the surface of the reflective layer, irregularities are formed on the electrodes formed on the reflective layer, and the direction of the electric field that drives the liquid crystal may be disturbed.

  The present invention has been made in view of such circumstances, and provides a liquid crystal device and an electronic apparatus that can prevent electric field disturbance due to unevenness on the surface of a reflective layer and can perform good reflective display. For the purpose.

  In order to solve the above problems, a liquid crystal device of the present invention includes a pair of substrates that sandwich a liquid crystal layer, and a first electrode and a second electrode on one side of the pair of substrates on the liquid crystal layer side. The liquid crystal layer is driven by an electric field generated between the first electrode and the second electrode, and a reflective layer is provided on the liquid crystal layer side of the other of the pair of substrates. The surface of the reflective layer is uneven. According to this configuration, since the first electrode, the second electrode, and the reflective layer are formed on different substrates, the electric field generated between the electrodes is not disturbed by the irregularities on the surface of the reflective layer. As a result, a good reflective display can be realized.

  In the present invention, a reflective display region in which the reflective layer is formed in one sub-pixel region and a transmissive display region in which the reflective layer is not formed are provided, and a retardation layer is provided on the liquid crystal layer side of the reflective layer. Provided, the reflective display region and the transmissive display region have the same liquid crystal layer thickness, and the main direction of the electric field generated between the first electrode and the second electrode in the reflective display region is Different from the main direction of the electric field generated between the first electrode and the second electrode in the transmissive display region, the initial alignment does not generate an electric field between the first electrode and the second electrode in the reflective display region. The alignment direction of the liquid crystal layer in a state is preferably different from the alignment direction of the liquid crystal layer in an initial alignment state in which an electric field is not generated between the first electrode and the second electrode in the transmissive display region. According to this configuration, since the main direction of the electric field in the transmissive display region is different from the main direction of the electric field in the reflective display region, the alignment state of the liquid crystal when the voltage is applied in the transmissive display region and the liquid crystal when the voltage is applied in the reflective display region. The orientation state can be made different. In this case, the phase difference that the liquid crystal layer gives to the light transmitted through the liquid crystal layer can be made different between the transmissive display area and the reflective display area, so that the polarization of the display light can be changed without changing the thickness of the liquid crystal layer. The difference in state can be resolved. Therefore, according to the present invention, it is possible to obtain good display in both transmissive display and reflective display without using a multi-gap structure.

  In the present invention, it is desirable that a planarizing resin layer is provided between the reflective layer and the retardation layer. According to this configuration, since the unevenness on the surface of the reflective layer can be flattened, a retardation layer having a uniform layer thickness can be formed.

  In the present invention, it is desirable that the phase difference of the liquid crystal layer in the reflective display region is ½ wavelength, and the phase difference of the retardation layer is ¼ wavelength. According to this structure, the laminated body of a liquid crystal layer and a phase difference layer can be functioned as a broadband 1/4 phase difference plate. Further, since the retardation of the retardation layer is ¼ wavelength, the thickness of the retardation layer can be reduced, and the optical characteristics of the entire retardation layer can be precisely controlled. That is, when the layer thickness of the retardation layer is large, the layer thickness of the retardation layer may be non-uniform when it is formed by a single coating process. In addition, since the retardation layer is formed by a method in which a liquid crystal material is applied onto the alignment film and is dried and solidified, the retardation layer is aligned in a predetermined direction. The liquid crystal material is not sufficiently aligned, and precise optical design cannot be performed. However, in the liquid crystal device of the present invention, since the layer thickness of the retardation layer is small, problems such as non-uniform layer thickness and insufficient orientation of the entire retardation layer are unlikely to occur. Overall, good optical properties can be obtained.

  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 having excellent display quality can be provided.

  Embodiments of the present invention will be described below with reference to the drawings. Such an embodiment shows one aspect of the present invention and does not limit the present invention. In the following embodiments, various shapes, combinations, and the like of the constituent members are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention. Moreover, in the following drawings, in order to make each structure easy to understand, an actual structure and a scale, a number, and the like in each structure are different.

[First Embodiment]
FIG. 1 is a circuit configuration diagram of a plurality of sub-pixels formed in a matrix that constitutes the liquid crystal device 100 according to the first embodiment of the present invention. The liquid crystal device 100 according to the present embodiment includes an FFS (Fringe Field Switching) method among horizontal electric field methods that display an image by applying an electric field (transverse electric field) in the direction of the substrate surface to the liquid crystal and controlling the alignment. This is a liquid crystal device that employs a so-called method. In addition, a color liquid crystal device having a color filter on a substrate, in which one pixel is composed of three sub-pixels that emit light of each color of R (red), G (green), and B (blue). It has become. Therefore, a display area which is a minimum unit constituting display is referred to as a “sub-pixel area”, and a display area including a set of (R, G, B) sub-pixels is referred to as a “pixel area”.

  As shown in FIG. 1, a plurality of sub-pixel areas formed in a matrix that form an image display area of the liquid crystal device 100 are respectively connected to a pixel electrode 9 and a pixel electrode 9. The TFT 30 for switching control is formed, and the data line 6 a extending from the data line driving circuit 101 is electrically connected to the source of the TFT 30. The data line driving circuit 101 supplies the image signals S1, S2,..., Sn to each pixel via the data line 6a. The image signals S1 to Sn may be supplied line-sequentially in this order, or may be supplied for each group to a plurality of adjacent data lines 6a.

A scanning line 3 a extending from the scanning line driving circuit 102 is electrically connected to the gate of the TFT 30, and scanning signals G 1 and G 2 supplied in a pulsed manner from the scanning line driving circuit 102 to the scanning line 3 a at a predetermined timing. ,..., Gm are applied to the gate of the TFT 30 in line order in this order. The pixel electrode 9 is electrically connected to the drain of the TFT 30.
Then, the TFT 30 as a switching element is turned on for a certain period by the input of the scanning signals G1, G2,..., Gm, so that the image signals S1, S2,. The pixel electrode 9 is written with timing.

  Image signals S1, S2,..., Sn written to the liquid crystal via the pixel electrode 9 are held for a certain period between the common electrode facing the pixel electrode 9 via the liquid crystal. Here, in order to prevent the held image signal from leaking, a storage capacitor 70 is connected in parallel with the liquid crystal capacitor formed between the pixel electrode 9 and the common electrode. The storage capacitor 70 is provided between the drain of the TFT 30 and the capacitor line 3b.

  FIG. 2 is a plan configuration diagram of an arbitrary one subpixel of the liquid crystal device 100. In the sub-pixel region of the liquid crystal device 100, a pixel electrode (first electrode) 9 that is long in the Y-axis direction, which has a substantially ladder shape in plan view, and a substantially flat solid surface that is arranged to overlap the pixel electrode 9 in a planar manner. A common electrode (second electrode) 19 is provided. Columnar spacers 40 for holding the first substrate 10 and the second substrate 20 at a predetermined interval are provided at corners (or gaps between the subpixel regions) at the upper left end of the subpixel region in the figure. It is erected.

  The pixel electrode 9 includes a plurality of (in the drawing, 14) strip electrodes 228 and 229 formed by a plurality of opening slits 209s, and a plan view connected to both end portions of these strip electrodes 228 and 229 in the horizontal direction in the drawing. A frame body portion 9a having a substantially rectangular frame shape is provided. In the portion of the pixel electrode 9 located in the reflective display region R, a plurality of (seven in the figure) strip-like electrodes 228 formed by the opening slits 209s are arranged in the upper right direction (in the direction of 5 ° with respect to the X axis). The plurality of strip electrodes 228 are arranged in parallel with each other at equal intervals. In the portion of the pixel electrode 9 positioned in the transmissive display region T, a plurality of (seven in the drawing) strip-shaped electrodes 229 formed by the opening slits 209 s are 45 ° with respect to the extending direction of the strip-shaped electrode 228. Extending in a direction (a direction of −40 ° with respect to the X axis), and the plurality of strip electrodes 229 are arranged in parallel with each other at equal intervals.

The common electrode 19 is formed so as to cover the reflective layer 29 partially provided in the sub-pixel region. In this embodiment, the common electrode 19 is a conductive film made of a transparent conductive material such as ITO (indium tin oxide), and the reflective layer 29 is a light reflective metal film such as aluminum or silver, or a refractive index. It is composed of a dielectric laminated film (dielectric mirror) in which different dielectric films (SiO ₂ and TiO ₂ or the like) are laminated. The liquid crystal device 100 preferably has a function of scattering the reflected light from the reflective layer 29. With this configuration, the visibility of the reflective display can be improved.

  The common electrode 19 has a configuration in which the transparent electrode made of a transparent conductive material and a reflective electrode made of a light-reflective metal material are planar in addition to the structure formed so as to cover the reflective layer 29 as in the present embodiment. A transparent electrode arranged corresponding to the reflective display area, and a reflective electrode arranged corresponding to the reflective display area, both electrodes being a transmissive display area and a reflective display area Those that are electrically connected to each other (boundary portion) can also be adopted. In this case, the transparent electrode and the reflective electrode constitute a common electrode that generates an electric field between the pixel electrode 9 and the reflective electrode also functions as a reflective layer in the sub-pixel region.

  In the sub-pixel region, a data line 6a extending in the X-axis direction, a scanning line 3a extending in the Y-axis direction, and a capacitor line 3b extending in parallel with the scanning line 3a adjacent to the scanning line 3a are formed. A TFT 30 is provided in the vicinity of the intersection of the data line 6a and the scanning line 3a. The TFT 30 includes a semiconductor layer 35 made of an island-shaped amorphous silicon film partially formed in the planar region of the scanning line 3a, a source electrode 6b formed partially overlapping the semiconductor layer 35, and a drain electrode. 32. The scanning line 3 a functions as a gate electrode of the TFT 30 at a position overlapping the semiconductor layer 35 in plan view.

  The source electrode 6b of the TFT 30 has a substantially L shape in plan view extending from the data line 6a and extending to the semiconductor layer 35, and the drain electrode 32 extends from the semiconductor layer 35 to the −Y side and substantially rectangular in plan view. The capacitor electrode 31 is electrically connected. A contact portion of the pixel electrode 9 is disposed on the capacitor electrode 31, and the capacitor electrode 31 and the pixel electrode 9 are electrically connected via a pixel contact hole 45 provided at a position where they overlap in a plane. Has been. Further, the capacitor electrode 31 is disposed in the plane region of the capacitor line 3b, and a storage capacitor 70 having the capacitor electrode 31 and the capacitor line 3b facing each other in the thickness direction is formed at the position.

  FIG. 3 is a partial cross-sectional configuration diagram taken along the line AA ′ in FIG. 2. The liquid crystal device 100 includes a configuration in which a liquid crystal layer 50 is sandwiched between a first substrate 10 and a second substrate 20 that are arranged to face each other, and the liquid crystal layer 50 includes the first substrate 10 and the second substrate 20. Are sealed between the substrates 10 and 20 by a sealing material (not shown) provided along the edge of the region facing each other. A polarizing plate 14 is provided on the outer surface side of the first substrate 10 (the side opposite to the liquid crystal layer), and a polarizing plate 24 is provided on the outer surface side of the second substrate 20. A backlight (illuminating device) 90 including a light source, a light guide plate 91, and a reflection plate 92 is provided on the back side (the lower side in the drawing) of the first substrate 10.

  The first substrate 10 has a substrate body 10A made of glass, quartz, plastic, or the like as a base, and an interlayer insulating film 60 such as an acrylic resin is formed on the inner surface side (the liquid crystal layer 50 side) of the substrate body 10A. . Concavities and convexities 60a are formed in a part of the interlayer insulating film 60, and a reflective layer 29 is formed to cover the concavities and convexities 60a. The surface of the reflective layer 29 is provided with a concavo-convex shape following the concavo-convex 60a, and the reflective layer 29 constitutes a light scattering reflecting means by the concavo-convex shape.

  As described above, in the liquid crystal device 100 according to this embodiment in which the reflective layer 29 is partially formed in the sub-pixel region, the formation region of the reflective layer 29 in the one sub-pixel region shown in FIG. This is a reflective display region R that reflects and modulates light that enters from the outside 20 and passes through the liquid crystal layer 50 to display. In addition, a light transmission region outside the formation region of the reflective layer 29 is a transmission display region T that performs display by modulating light incident from the backlight 90 and transmitted through the liquid crystal layer 50.

  A first planarizing resin layer 61 such as an acrylic resin is formed on the reflective layer 29. The first flattening resin layer 61 is for flattening the unevenness imparted to the surface of the reflective layer 29. A retardation layer 62 is formed on the first planarizing resin layer 61. The first planarizing resin layer 61 and the retardation layer 62 are formed in a region excluding the transmissive display region T. A second planarizing resin layer 63 such as an acrylic resin is formed around the first planarizing resin layer 61 and the retardation layer 62, and is formed on the substrate formed by the first planarizing resin layer 61 and the retardation layer 62. The step is flattened. An alignment film 18 made of polyimide or the like is formed so as to cover the retardation layer 62 and the second planarizing resin layer 63.

  In the case of the present embodiment, the phase difference layer 62 gives a phase difference of approximately ¼ wavelength (λ / 4) to light having a vibration direction parallel to the optical axis direction. It is a so-called inner surface retardation layer provided on the inner surface side. The retardation layer 62 is formed by a method in which a solution containing a liquid crystal material (a liquid crystal monomer or a liquid crystal oligomer) is applied on an alignment film (not shown) and is aligned in a predetermined direction when dried and solidified. In addition, the liquid crystal layer 50 is made of a liquid crystal having positive dielectric anisotropy, and the retardation Δnd of the liquid crystal layer 50 in the reflective display region R is approximately ½ wavelength (λ / 2) in an initial alignment state where no voltage is applied. A phase difference is imparted. For this reason, the laminated body of the liquid crystal layer 50 and the retardation layer 62 functions as a broadband quarter retardation plate, the reflectance is reduced over the entire visible light region, and a low reflectance and achromatic reflective display is obtained. It is supposed to be.

  Since the step generated in the formation region of the first planarizing resin layer 61 and the retardation layer 62 is planarized by the second planarizing resin layer 63, the liquid crystal layer 50 of the reflective display region R and the transmissive display region T The layer thickness is equal. For this reason, it is a single gap structure that does not have a multi-gap structure, and alignment failure is unlikely to occur at the boundary between the reflective display region R and the transmissive display region T.

  On the other hand, the second substrate 20 has a substrate body 20A made of glass, quartz, plastic, or the like as a base, and a color filter that transmits different colored light for each sub-pixel on the inner surface side (liquid crystal layer 50 side) of the substrate body 20A. A CF layer 22 is formed. The color filter is preferably configured to be divided into two types of color material regions having different chromaticities in the sub-pixel. Specifically, a first color material region is provided corresponding to the planar region of the transmissive display region T, and a second color material region is provided corresponding to the planar region of the reflective display region R. A configuration in which the chromaticity of one color material region is larger than the chromaticity of the second color material region can be employed. Moreover, it is good also as a structure which provides a non-colored area | region in a part of reflective display area | region R. FIG. By adopting such a configuration, it is possible to prevent the chromaticity of the display light from being different between the transmissive display region T in which the display light is transmitted only once through the color filter and the reflective display region R in which the display light is transmitted twice. The display quality can be improved by aligning the appearance of the reflective display and the transmissive display. The CF layer 22 can also be formed on the first substrate 10 side.

  On the liquid crystal layer 50 side of the CF layer 22, scanning lines 3a and capacitance lines 3b are formed, and a gate insulating film 11 is formed to cover the scanning lines 3a and capacitance lines 3b. An amorphous silicon semiconductor layer 35 is formed on the gate insulating film 11, and a source electrode 6 b and a drain electrode 32 are formed so as to partially run over the semiconductor layer 35. A capacitive electrode 31 is integrally formed on the right side of the drain electrode 32 in the figure. The semiconductor layer 35 is disposed to face the scanning line 3 a via the gate insulating film 11, and the scanning line 3 a constitutes the gate electrode of the TFT 30 in the facing region. The capacitor electrode 31 is disposed opposite to the capacitor line 3b through the gate insulating film 11, and a storage capacitor 70 having the gate insulating film 11 as a dielectric film is formed in a region where the capacitor electrode 31 and the capacitor line 3b are opposed. Has been.

  A first interlayer insulating film 12 is formed so as to cover the semiconductor layer 35, the source electrode 6 b, the drain electrode 32, and the capacitor electrode 31. A common electrode 19 made of a transparent conductive material such as ITO is formed so as to cover the first interlayer insulating film 12. A second interlayer insulating film 13 made of silicon oxide or the like is formed so as to cover the common electrode 19. A pixel electrode 9 made of a transparent conductive material such as ITO is formed on the surface of the second interlayer insulating film 13 on the liquid crystal layer side. An alignment film 28 made of polyimide or the like is formed so as to cover the pixel electrode 9 and the second interlayer insulating film 13.

  A pixel contact hole 45 penetrating the first interlayer insulating film 12 and the second interlayer insulating film 13 and reaching the capacitor electrode 31 is formed, and a part (contact portion) of the pixel electrode 9 is formed in the pixel contact hole 45. The pixel electrode 9 and the capacitor electrode 31 are electrically connected by being embedded. The common electrode 19 has an opening corresponding to the region where the pixel contact hole 45 is formed, and the pixel electrode 9 and the capacitor electrode 31 are electrically connected through the opening, and the common electrode 19 19 and the pixel electrode 9 are configured not to be short-circuited.

  FIG. 4 is an explanatory diagram of the arrangement of the optical axes of the respective optical members of the liquid crystal device 100. The transmission axis 153 of the polarizing plate 14 and the transmission axis 155 of the polarizing plate 24 are orthogonal to each other. The transmission axis 155 of the polarizing plate 24 is parallel to the main direction 156 of the electric field generated between the pixel electrode 9 and the common electrode 19 in the reflective display region R (the direction orthogonal to the extending direction of the strip electrode 229 shown in FIG. 2). It is. The optical axis 160 (slow axis) of the retardation layer 62 is orthogonal to the transmission axis 155 of the polarizing plate 24. The rubbing direction 161 of the alignment films 18 and 28 in the reflective display region R is arranged in a direction that forms 22.5 ° with the transmission axis 155 of the polarizing plate 24. The rubbing direction 162 of the alignment films 18 and 28 in the transmissive display region T is parallel to the transmission axis 155 of the polarizing plate 24. The rubbing direction of the alignment films 18 and 28 is not limited to this, but is a direction intersecting with the main direction of the electric field generated between the pixel electrode 9 and the common electrode 19. In the initial state, the liquid crystal aligned in parallel along the rubbing direction is rotated and aligned toward the main direction side of the electric field by applying a voltage between the pixel electrode 9 and the common electrode 19. Bright and dark display is performed based on the difference between the initial alignment state and the alignment state when a voltage is applied.

  As described above, according to the liquid crystal device 100 of the present embodiment, the pixel electrode 9 and the common electrode 19 and the reflective layer 29 are formed on different substrates. It is not disturbed by surface irregularities. As a result, a good reflective display can be realized. Further, since the main direction of the electric field in the transmissive display region T and the main direction of the electric field in the reflective display region R are different, the alignment state of the liquid crystal when the voltage is applied in the transmissive display region T and the liquid crystal when the voltage is applied in the reflective display region R. The orientation state can be made different. In this case, the phase difference that the liquid crystal layer 50 gives to the light transmitted through the liquid crystal layer 50 can be made different between the transmissive display region T and the reflective display region R, so that the layer thickness of the liquid crystal layer 50 is not changed. The difference in the polarization state of the display light can be eliminated. Therefore, good display can be obtained in both transmissive display and reflective display without using a multi-gap structure. Furthermore, since the first planarizing resin layer 61 is provided between the reflective layer 29 and the retardation layer 62, the retardation layer 62 having a uniform layer thickness can be formed.

  In addition, since the retardation of the liquid crystal layer 50 in the reflective display region R is ½ wavelength and the retardation of the retardation layer 64 is ¼ wavelength, the laminate of the liquid crystal layer 50 and the retardation layer 62 is formed. It can function as a broadband 1/4 phase difference plate. Further, since the retardation of the retardation layer 62 is ¼ wavelength, the thickness of the retardation layer 62 can be reduced, and the optical characteristics of the entire retardation layer can be precisely controlled. That is, when the layer thickness of the retardation layer 62 is large, the layer thickness of the retardation layer 62 may be non-uniform when it is formed by a single coating process. The retardation layer 62 is formed by a method in which a liquid crystal material is applied onto the alignment film and is oriented in a predetermined direction when dried and solidified. Therefore, if the retardation layer 62 is thick, it is far from the alignment film. The liquid crystal material in the portion is not sufficiently aligned, and precise optical design cannot be performed. However, in the liquid crystal device 100 of the present embodiment, since the layer thickness of the retardation layer 62 is small, problems such as non-uniform layer thickness and insufficient alignment of the entire retardation layer hardly occur. Good optical characteristics can be obtained in the entire retardation layer.

  In the present embodiment, a method called an FFS method is adopted. However, the above configuration can also be applied to an IPS (In Plane Switching) method that operates a liquid crystal with an electric field in the substrate surface direction. Further, the technical scope of the present invention is not limited to a lateral electric field drive type liquid crystal device typified by an FFS mode or an IPS mode, but includes a TN mode or VAN mode liquid crystal and is positioned on the liquid crystal layer side of one substrate. The present invention can also be applied to a liquid crystal device provided with a phase difference layer.

  In the present embodiment, the second planarizing resin layer 63 and the interlayer insulating film 60 are formed as separate members. However, they can be formed integrally. FIG. 5 shows an example in which a concave portion is formed in the reflective display region R of the interlayer insulating film 64, and the reflective layer 29, the planarizing resin layer 61, and the retardation layer 62 are formed in the concave portion. The interlayer insulating film 64 can be formed, for example, by applying a photosensitive resin on the substrate and using the gradation mask to vary the exposure amounts of the reflective display region R and the transmissive display region T. The unevenness 64a can be formed by varying the exposure amount in the reflective display region R when performing exposure using the gradation mask.

[Electronics]
FIG. 6 is a schematic diagram of a mobile phone which is an example of an electronic apparatus according to the present invention. A cellular phone 1300 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. Thus, a mobile phone 1300 provided with a display unit that is configured by the liquid crystal device of the present invention and has excellent display quality can be provided.

  The liquid crystal display device of each of the above embodiments is not limited to the above mobile phone, but an electronic book, personal computer, digital still camera, liquid crystal television, viewfinder type or monitor direct view type video tape recorder, car navigation device, pager, electronic It can be suitably used as an image display means for devices such as notebooks, calculators, word processors, workstations, videophones, POS terminals, touch panels, etc., and any electronic device can display with high contrast and wide viewing angle. It has become.

It is an equivalent circuit diagram of the liquid crystal device of the first embodiment. It is a plane block diagram of 1 sub pixel of the liquid crystal device. FIG. 3 is a cross-sectional configuration diagram taken along line A-A ′ of FIG. 2. It is explanatory drawing of arrangement | positioning of the optical axis of the optical member of the liquid crystal device. It is a cross-sectional block diagram of the other structural example of the liquid crystal device. It is a schematic block diagram of the mobile telephone which is an example of an electronic device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 ... Pixel electrode (1st electrode), 10 ... 1st board | substrate, 19 ... Common electrode (2nd electrode), 20 ... 2nd board | substrate, 29 ... Reflective layer, 50 ... Liquid crystal layer, 61 ... 1st planarization resin layer , 62 ... retardation layer, 63 ... second planarizing resin layer, 100 ... liquid crystal device, 156 ... main direction of horizontal electric field in reflective display region, 157 ... main direction of horizontal electric field in transmissive display region, 161 ... reflective display region Rubbing direction (the orientation direction of the liquid crystal layer in the initial alignment state of the reflective display region), 162... The rubbing direction of the transmissive display region (the orientation direction of the liquid crystal layer in the initial alignment state of the transmissive display region), 1300. ), R ... reflective display area, T ... transmissive display area

Claims (5)

A pair of substrates sandwiching a liquid crystal layer, wherein a first electrode and a second electrode are provided on the liquid crystal layer side of one of the pair of substrates, and the first electrode and the second electrode The liquid crystal layer is driven by an electric field generated therebetween,
A liquid crystal device, wherein a reflective layer is provided on the liquid crystal layer side of the other substrate of the pair of substrates, and the surface of the reflective layer is provided with irregularities. A reflective display region in which the reflective layer is formed in one sub-pixel region and a transmissive display region in which the reflective layer is not formed;
A retardation layer is provided on the liquid crystal layer side of the reflective layer,
Layer thickness of the liquid crystal layer in the reflective display area and the transmissive display area is equal,
The main direction of the electric field generated between the first electrode and the second electrode in the reflective display region is the main direction of the electric field generated between the first electrode and the second electrode in the transmissive display region. Unlike
The alignment direction of the liquid crystal layer in an initial alignment state that does not generate an electric field between the first electrode and the second electrode in the reflective display region is such that the first electrode and the second electrode are aligned in the transmissive display region. 2. The liquid crystal device according to claim 1, wherein the liquid crystal device is different from the alignment direction of the liquid crystal layer in an initial alignment state in which no electric field is generated therebetween.   The liquid crystal device according to claim 2, wherein a planarizing resin layer is provided between the reflective layer and the retardation layer.   4. The liquid crystal device according to claim 2, wherein a phase difference of the liquid crystal layer in the reflective display region is ½ wavelength, and a phase difference of the retardation layer is ¼ wavelength.   An electronic apparatus comprising the liquid crystal device according to claim 1.

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