JP4169067B2 - Liquid crystal display device and electronic device - Google Patents

Description

  The present invention relates to a liquid crystal display device, and more particularly to a so-called transflective liquid crystal display device capable of selectively displaying a reflective display and a transmissive display. Furthermore, the present invention relates to an electronic device including the liquid crystal display device.

  Conventionally, reflective liquid crystal devices have been used extensively in mobile devices and attached display parts of devices due to their low power consumption. However, since they are visible using external light, they can be displayed in dark places. There was a problem that it could not be read. For this reason, a liquid crystal device has been proposed in which outside light is used in a bright place in the same manner as a normal reflective liquid crystal device, but in a dark place, the display can be visually recognized by an internal light source. As described in JP-A-57-042771, a polarizing plate, a transflective plate, and a backlight are sequentially arranged on the outer surface opposite to the observation side of the liquid crystal cell. . In this liquid crystal device, when the surroundings are bright, external light is taken in and reflection type display is performed using the light reflected by the semi-transmissive reflecting plate. When the surrounding becomes dark, the backlight is turned on and the semi-transmissive reflecting plate is turned on. A transmissive display in which the display can be visually recognized by the light transmitted through is performed.

  However, such a configuration has a drawback that the display becomes dark because there is a polarizing plate between the liquid crystal cell and the transflective plate.

  In order to solve the above problems, the present inventors have provided a liquid crystal display device in which a line-shaped transflective film is formed on the inner surface side of the rear panel substrate, and a polarizing plate and a backlight are sequentially arranged on the outer surface side. Developed (PCT / JP99 / 00311). In this liquid crystal display device, when the surroundings are bright, the reflective display is performed by taking in the outside light and using the light reflected by the transflective film. And a transmissive display in which the display can be visually recognized by the light transmitted through the transflective reflector. With such a configuration, since there is no polarizing plate between the liquid crystal cell and the transflective plate, a reflective display brighter than the liquid crystal device described above can be obtained.

  However, in the liquid crystal display device in which the transflective film is formed on the inner surface side of the back side panel substrate, since the opening has a line shape, the liquid crystal layer is efficiently emitted due to the light diffraction phenomenon. The transmissive display with sufficient brightness could not be performed.

  Means taken by the present invention to solve the above problems are as follows.

The liquid crystal display device of the present invention is a liquid crystal display device that performs transmissive display and reflective display, a liquid crystal layer sandwiched between a pair of substrates, an illumination device that emits light toward the liquid crystal layer, A first polarizing plate disposed between the lighting device and the liquid crystal layer; and a second polarizing plate disposed on the opposite side of the liquid crystal layer from the side on which the first polarizing plate is disposed. The reflective layer disposed between the liquid crystal layer and the lighting device, the reflective layer is not disposed, and has a shape having a longitudinal direction and a lateral direction, and in the transmissive display A prism that includes a light transmitting region, a plurality of inclined surfaces that are located between the illumination device and the reflective layer, the surface on the reflective layer side has a mountain shape, and is formed by the mountain shape. A prism sheet having a structure, and the prism sheet has the mountain shape. A ridge line direction is formed I, wherein the longitudinal direction is characterized in that it is arranged so as to intersect.
The liquid crystal display device of the present invention is a liquid crystal display device that performs transmissive display and reflective display, a liquid crystal layer sandwiched between a pair of substrates, an illumination device that emits light toward the liquid crystal layer, A first polarizing plate disposed between the lighting device and the liquid crystal layer; and a second polarizing plate disposed on the opposite side of the liquid crystal layer from the side on which the first polarizing plate is disposed. The reflective layer disposed between the liquid crystal layer and the lighting device, the reflective layer is not disposed, and has a shape having a longitudinal direction and a lateral direction, and in the transmissive display A plurality of inclined surfaces that are located between the light transmitting region, the illumination device, and the reflective layer, and the surface on the reflective layer side has a mountain shape in a one-dimensional direction and is formed by the mountain shape. A prism sheet having a prism structure provided with the prism sheet, A ridge line direction is formed by the shape of the shape, the the longitudinal direction, characterized in that it is arranged so as to intersect.
The liquid crystal display device of the present invention is a liquid crystal display device that performs transmissive display and reflective display,
A liquid crystal layer sandwiched between a pair of substrates, an illumination device that emits light toward the liquid crystal layer, and
A first polarizing plate disposed between the lighting device and the liquid crystal layer; and a second polarizing plate disposed on the opposite side of the liquid crystal layer from the side on which the first polarizing plate is disposed. The film is disposed between the liquid crystal layer and the illuminating device, and is formed of a reflective conductive member, the film is not disposed, and has a shape having a longitudinal direction and a transverse direction, and the transmission A plurality of regions which are located between the illumination device and the film and have a chevron shape in a one-dimensional direction and are formed by the chevron shape. A prism sheet having a prism structure with an inclined surface, wherein the prism sheet is arranged so that a ridge line direction formed by the mountain shape intersects the longitudinal direction. Features.
The liquid crystal display device of the present invention is a liquid crystal display device that performs transmissive display and reflective display, a liquid crystal layer sandwiched between a pair of substrates, an illumination device that emits light toward the liquid crystal layer, A first polarizing plate disposed between the lighting device and the liquid crystal layer; and a second polarizing plate disposed on the opposite side of the liquid crystal layer from the side on which the first polarizing plate is disposed. And a film made of aluminum, arranged between the liquid crystal layer and the illumination device, the film is not arranged, and has a longitudinal direction and a lateral direction, and in the transmissive display. A plurality of inclined surfaces that are located between the illumination device and the film, the surface on the film side forms a mountain shape in a one-dimensional direction, and is formed by the shape of the mountain shape. A prism sheet having a prism structure, the prism sheet, Serial and ridge line formed by the chevron shape, the the longitudinal direction, characterized in that it is arranged so as to intersect.
The liquid crystal display device of the present invention further includes a pair of electrodes intersecting each other and a pixel portion defined by a region where the electrodes overlap, and the longitudinal direction is formed along the long side of the pixel portion. It is characterized by being.
The liquid crystal display device of the present invention further includes a signal line, a scanning line, and a pixel portion defined by the signal line and the scanning line, and the longitudinal direction is formed along the long side of the pixel portion. It is characterized by being.

  According to the first liquid crystal display device of the present invention, transmissive display can be performed using light from the illumination device that has passed through the opening of the reflective layer. At that time, the light emitted from the illumination device is collected by the light collecting means. The condensing means has a condensing direction in which light emitted from the illumination device at a wide angle is emitted toward the liquid crystal element at a relatively narrow angle. According to the experiment of the present inventor, this condensing direction and the short side direction of the line-shaped opening are not coincident, that is, as long as the condensing direction and the direction orthogonal to the longitudinal direction of the opening are shifted. The effect of brightening the transmissive display is obtained, and it has been confirmed that the transmissive display is brightest when the condensing direction and the longitudinal direction of the line opening are parallel. If the angle θ formed with the longitudinal direction of the opening is −30 ° or more and 30 ° or less, a bright transmissive display that can be sufficiently differentiated as a product can be obtained. It has been confirmed that the highest brightness is obtained which is the same as when the light direction and the longitudinal direction of the line opening are parallel.

  The effect of the present invention is that the unnecessary diffraction phenomenon that occurs when the light emitted from the illumination device attempts to pass through the line-shaped opening is divided into the light collecting direction of the light collecting means and the length of the line-shaped opening. It can be inferred that it can be obtained by setting the relationship with the direction as in the present invention as much as possible.

  A second liquid crystal device of the present invention is a liquid crystal display device that performs transmissive display and reflective display, and includes a liquid crystal layer sandwiched between a pair of substrates, and an illumination device that emits light toward the liquid crystal layer A first polarizing plate disposed between the lighting device and the liquid crystal layer, and a second polarizing plate disposed on the opposite side of the liquid crystal layer from the side on which the first polarizing plate is disposed. The plate is disposed between the liquid crystal layer and the lighting device, a film made of aluminum or a reflective conductive member, the film is not disposed, and has a shape including a longitudinal direction and a lateral direction, In addition, a plurality of regions in which light is transmitted in the transmissive display, the illumination device, and the film are positioned, and the film side surface has a chevron shape and is formed by the chevron shape. A prism sheet having a prism structure with an inclined surface, and the prism Over DOO, said ridge line direction is formed by a chevron shape, the the longitudinal direction, characterized in that it is arranged so as to intersect.

  According to the second liquid crystal display device of the present invention, transmissive display can be performed using light from an illumination device that has passed through an opening of a film made of aluminum or a reflective conductive member. At that time, the light emitted from the illumination device enters the prism sheet. The prism sheet has a chevron-shaped surface on the liquid crystal element side, and the light from the direction perpendicular to the ridge line direction formed by the chevron shape of the light from the illumination device is set at a relatively narrow angle. The light is emitted toward the element. According to the inventor's experiment, the effect of brightening the transmissive display is obtained as long as the ridge line direction and the longitudinal direction of the opening are shifted, and the ridge line direction and the longitudinal direction of the opening are orthogonal to each other. In this case, it is confirmed that the transmissive display is brightest, but if the angle formed between the direction perpendicular to the ridge line direction and the longitudinal direction of the line opening is -30 ° to 30 °, the product A bright transmissive display that can be sufficiently differentiated is obtained, and the maximum brightness that is almost the same as when the ridgeline direction and the longitudinal direction of the opening are orthogonal is obtained by setting it to −10 ° to 10 °. Has been confirmed.

  The effect of the present invention is that the unnecessary diffraction phenomenon that occurs when the light emitted from the illumination device attempts to pass through the line-shaped opening is divided into the ridgeline direction of the prism sheet and the longitudinal direction of the line-shaped opening. It can be inferred that this relationship can be obtained by setting the above relationship as in the present invention.

  Further, if another prism sheet is used and the ridge lines are shifted and overlapped with each other, the transmissive display becomes brighter. In that case, it is preferable that the two prism sheets are stacked so that the ridge line directions are orthogonal to each other, and further, the prism sheet closer to the liquid crystal element is arranged with the ridge line direction and the longitudinal direction of the opening. It has been found that the brightest transmissive display can be obtained if they are arranged so as to be orthogonal.

  In addition, such a prism sheet is marketed as BEF-90 (trade name) by 3M Corporation in the United States, and is generally available.

  Moreover, it is preferable that the reflective layer also serves as an electrode to which a signal for driving the liquid crystal layer is supplied.

  In this aspect, since the reflective layer has both a function of reflecting external light and a function of applying a voltage to the liquid crystal layer, it is manufactured in terms of the device configuration as compared with the configuration in which the reflective layer and the electrode are separately formed. This is advantageous in terms of process or design, and can reduce costs.

  Further, it is preferable that a transparent electrode is provided on the reflective layer, and a signal for driving the liquid crystal layer is supplied to the transparent electrode.

  In this embodiment, a transparent electrode is provided separately from the reflective layer, and the liquid crystal layer is driven by a voltage applied between the transparent electrode and the transparent electrode provided on the upper substrate. According to this aspect, there is an effect that the flicker is reduced as compared with the case where the liquid crystal is driven by applying a voltage between the reflective layer and the transparent electrode. This is because, since the ionization tendency is different between the reflective layer and the transparent electrode, a polarity difference occurs between the electrodes. In this case, an interlayer insulating film such as an acrylic resin, silicon oxide, titanium oxide, or zirconium oxide may be disposed between the reflective layer or the reflective layer and the transparent electrode.

  The reflective layer may be any reflective member, but Al (aluminum), Ag (silver), Cr (chromium), or the like may be used in order to achieve high reflectivity. Needless to say, when the reflective layer or the reflective layer is used as an electrode, the reflective layer must be formed of a conductive material.

  Further, if irregularities are formed in the reflective layer, the light reflected by the reflective layer can be made scattered light. If the reflection layer is a mirror surface, it becomes a mirror-like reflection-type display, and the display becomes dark depending on the viewing angle. Therefore, it is effective to make the reflection layer uneven. Even if a forward scattering plate that scatters outgoing light in the forward direction is arranged on the front side of the liquid crystal element, it is possible to display with scattered light. In this case, not only reflective display but also transmissive display Is also displayed by scattered light.

  The electronic apparatus according to the present invention includes the first or second liquid crystal display device as a display unit thereof, and includes an input unit for operating ON / OFF of the lighting device.

  According to the electronic apparatus of the present invention, since ON / OFF of the lighting device can be controlled by the input unit according to the brightness of the surroundings, there is an electronic apparatus in which the user can arbitrarily select either transmissive display or reflective display. Realize. In addition, since the first or second liquid crystal device is used as a display portion, a liquid crystal display device having a bright transmissive display is realized.

  Next, details of the liquid crystal display device according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic longitudinal sectional view showing the structure of a liquid crystal device according to the present invention. Although this liquid crystal display device is basically related to a simple matrix type liquid crystal display device, it can be applied to an active matrix type device, other segment type devices, and other liquid crystal display devices with the same configuration. It is.

  In this embodiment, a liquid crystal element in which a liquid crystal layer 103 is sealed with a frame-shaped sealing material 104 is formed between two transparent substrates 101 and 102. The liquid crystal layer 103 is composed of nematic liquid crystal having a predetermined twist angle. A color filter 109 is formed on the inner surface of the upper transparent substrate 101, and colored layers of R (red), G (green), and B (blue) are arranged in a predetermined pattern on the color filter 109. ing. A transparent protective film 110 is coated on the surface of the color filter, and a plurality of line-shaped transparent electrodes 111 are formed on the surface of the protective film 110 from ITO (indium, titanium, oxide) or the like. An alignment film 112 made of polyimide is formed on the surface of the transparent electrode 111, and the surface on the liquid crystal layer side is rubbed.

  On the other hand, a transflective film 114 containing aluminum as a main component is formed for each colored layer of the color filter 109 on the inner surface side of the lower transparent substrate 102. As shown in FIG. 2A, a line-shaped opening 203 is formed in the transflective film 114 so that light emitted from the illumination device can be transmitted into the liquid crystal layer 103. The transflective film 114 also serves as an electrode to which a signal for driving the liquid crystal layer 103 is supplied. The liquid crystal layer 103 is applied between the transparent electrode 111 provided on the substrate 101 and the transflective film 114. Driven by the applied voltage. The transflective film is not limited to aluminum, and a reflective conductive member such as silver or chromium can be substituted.

  An alignment film 113 made of polyimide is formed on the transflective film 114 in the same manner as on the surface of the transparent electrode 111, and the surface on the liquid crystal layer side is rubbed.

  A polarizing plate 105 is disposed on the outer surface of the upper transparent substrate 101, and a retardation plate 106 is disposed between the polarizing plate 105 and the transparent substrate 101. A retardation plate 108 is disposed behind the transparent substrate 102 below the liquid crystal element, and a polarizing plate 107 is disposed behind the retardation plate 108.

  A backlight having a fluorescent tube that emits white light and a light guide plate 115 having an incident end surface along the fluorescent tube is disposed below the polarizing plate 107. The light guide plate 115 is a transparent body such as an acrylic resin plate in which a rough surface for scattering is formed on the entire back surface or a printed layer for scattering is formed, and receives light from a fluorescent tube as a light source at an end surface. Nearly uniform light is emitted from the upper surface of the figure.

  The backlight may be an LED (light emitting diode) or EL (electroluminescence) instead of a fluorescent tube.

  A prism sheet 116 as a light collecting means is disposed between the backlight and the polarizing plate. This prism sheet is formed of a translucent member, and has a prism shape in which the lower surface is flat and the upper surface has a mountain shape, as shown in FIGS. 3 (a) and 3 (b). This prism sheet has a function of diffracting light incident from a lower surface of the prism sheet at a certain angle with respect to the BB direction in the drawing and emitting the light from the upper surface at an angle smaller than the incident angle. That is, the incident light having an angle with respect to the BB direction is condensed and emitted. The prism sheet 116 is arranged so that the BB direction thereof substantially coincides with the longitudinal direction SS of the opening, that is, the ridge line formed by the mountain shape is the longitudinal direction SS of the line-shaped opening 203 of the semi-transmissive reflective film. It is almost orthogonal. When the positional relationship between the prism sheet and the opening is set as described above, a bright transmissive display is realized because unnecessary light diffraction does not occur in the opening of the transflective film.

  Table 1 shows the change in transmittance when the angle θ formed by BB and SS is changed. According to this table, it can be seen that the transmittance increases as the angle θ between BB and SS decreases. According to the inventor's visual evaluation, if θ is −30 ° or more and 30 ° or less, a bright transmissive display that can be sufficiently differentiated as a product can be obtained. It has been confirmed that the same brightness can be obtained as when θ is 0 ° (BB and SS are parallel).

  Next, the display operation of this liquid crystal display device will be described.

(1) Reflective display The external light transmitted through the polarizing plate 105 and the retardation plate 106 passes through the color filter 109 and the liquid crystal layer 103, is reflected by the semi-transmissive reflective film 114, and is emitted from the polarizing plate 105 again. . At this time, since the polarization action of the liquid crystal layer changes depending on the voltage applied to the liquid crystal layer 103, the bright state and the dark state, and the brightness between them are controlled.

(2) Transmission type display The light from the backlight is condensed by the prism sheet, and then becomes a predetermined polarization by the polarizing plate 107 and the phase difference plate 108, and the liquid crystal is emitted from the opening 203 provided in the transflective film 114. Introduced into layer 103.
Here, the light introduced into the liquid crystal layer 103 is modulated in the liquid crystal layer 103 according to a voltage applied between the transflective film 114 and the transparent electrode 111. Then, after passing through the color filter 109, it passes through the phase difference plate 106. At this time, according to the voltage applied to the liquid crystal layer 103, a state of transmitting (bright) the polarizing plate 105, a state of absorbing (dark), and an intermediate state (brightness) can be controlled.

  In this example, a simple matrix type liquid crystal display device has been described. Of course, an active matrix in which a transflective film is connected to a two-terminal element typified by a TFD element or a TFT element typified by a TFT element. The technical idea of the present invention can also be applied to a liquid crystal display device of a type.

  FIG. 2B shows an example in which the transflective film in this embodiment is connected to the TFT element. In FIG. 2B, 204 indicates a data line, 205 indicates a gate line, and 206 indicates a transflective film. The transflective film 206 is formed of a conductive material such as aluminum, and is supplied with a signal for driving the liquid crystal and is provided with a line-shaped opening 208. As in this example, even in a liquid crystal display device configured by connecting a transflective film to an active element, the prism sheet is arranged so as to substantially coincide with the BB direction of the prism sheet and the longitudinal direction SS of the line-shaped opening. Then, unnecessary light diffraction phenomenon does not occur in the opening of the transflective film, so that a bright transmissive display is realized. The relationship between the angle θ formed by BB and SS shown in Table 1 and the transmittance is also substantially the same. Therefore, if θ is set to −30 ° to 30 °, it is bright enough to be sufficiently differentiated as a product. A transmissive display is obtained, and the brightness that is almost the same as when θ is 0 ° (BB and SS are parallel) can be obtained by setting it to −10 ° to 10 °.

  In this example, the transflective film 114 also serves as an electrode for driving the liquid crystal layer 114. However, a separate transparent electrode is provided on the transflective film, and the liquid crystal layer is driven on the transparent electrode. A signal may be supplied.

(Example of electronic equipment)
Three examples of the electronic device of the present invention are shown in FIGS.

  The liquid crystal device of the present invention is suitable for portable devices that are used in various environments and require low power consumption.

  FIG. 5A shows a mobile phone, in which a display unit is provided at the upper front part of the main body. The liquid crystal display device of the present invention described above is mounted on the display unit. The main body portion is provided with an operation unit for controlling ON / OFF of the illumination device (backlight).

  Mobile phones are used in all environments, indoors and outdoors. Although it is often used in automobiles, it is very dark at night. Therefore, it is desirable that the display device used for the mobile phone is a transflective liquid crystal device capable of performing transmissive display using auxiliary light as necessary, mainly reflective display with low power consumption. The liquid crystal device of the present invention has a brighter transmissive display and a higher contrast ratio.

  FIG. 5B shows a watch, and a display unit is provided in the center of the main body. The liquid crystal display device of the present invention described above is mounted on the display unit. The main body portion is provided with an operation unit for controlling ON / OFF of the illumination device (backlight).

  FIG. 5C shows a portable information device typified by an electronic notebook, and a display unit is provided on the upper side of the main body. The liquid crystal display device of the present invention described above is mounted on the display unit. The keyboard of the main body is provided with an operation unit for controlling ON / OFF of the lighting device (backlight). A key used for character input or the like may be assigned as a soft switch for ON / OFF control of the lighting device (backlight).

1 is a schematic cross-sectional view of a liquid crystal display device according to the present invention. It is a figure which shows the example of the opening provided in a transflective film, (a) is a figure which shows the example of a simple matrix type | mold, (b) is an example of an active matrix type liquid crystal display device. It is a figure which shows a prism sheet, (a) is the BB direction sectional drawing, (b) is a perspective view. It is a figure which shows angle (theta) which the opening part SS provided in a semi-transmissive reflective film and the condensing direction BB of a prism sheet make. It is an example of the electronic device of this invention, (a) is a mobile phone, (b) is a timepiece, (c) is a small information device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 101,102 ... Transparent substrate, 103 ... Liquid crystal layer, 104 ... Sealing material, 105, 107 ... Polarizing plate, 106 ... Phase difference plate, 109 ... Color filter, 110 ... Protective film, 111 ... Transparent electrode, 112, 113 ... Orientation Membrane 114, transflective film 115 illumination device (backlight) 116 prism sheet 201 transparent electrode on inner surface of upper substrate 202, 207 transflective film 203, 208 opening 204, 204 Data line 205... Gate line 206. TFT element AA... Perpendicular direction to prism sheet condensing direction BB. Prism sheet condensing direction SS SS opening longitudinal direction.

Claims (6)

A liquid crystal display device that performs transmissive display and reflective display,
A liquid crystal layer sandwiched between a pair of substrates;
An illumination device that emits light toward the liquid crystal layer;
A first polarizing plate disposed between the lighting device and the liquid crystal layer;
A second polarizing plate disposed on the opposite side of the liquid crystal layer from the side on which the first polarizing plate is disposed;
A reflective layer disposed between the liquid crystal layer and the lighting device;
The reflective layer is not disposed, is a shape having a longitudinal direction and a lateral direction, and a region through which light is transmitted in the transmissive display,
The prism structure is provided between the illumination device and the reflective layer, and the surface on the reflective layer side has a mountain shape in a one-dimensional direction and includes a plurality of inclined surfaces formed by the mountain shape. A prism sheet,
The liquid crystal display device, wherein the prism sheet is arranged so that a ridge line direction formed by the mountain shape intersects the longitudinal direction. A liquid crystal display device that performs transmissive display and reflective display,
A liquid crystal layer sandwiched between a pair of substrates;
An illumination device that emits light toward the liquid crystal layer;
A first polarizing plate disposed between the lighting device and the liquid crystal layer;
A second polarizing plate disposed on the opposite side of the liquid crystal layer from the side on which the first polarizing plate is disposed;
A film that is disposed between the liquid crystal layer and the lighting device and made of a reflective conductive member;
The film is not disposed, has a shape having a longitudinal direction and a short direction, and a region through which light is transmitted in the transmissive display,
A prism sheet having a prism structure located between the illumination device and the film, wherein the film side surface has a mountain shape in a one-dimensional direction and includes a plurality of inclined surfaces formed by the mountain shape. And having
The liquid crystal display device, wherein the prism sheet is arranged so that a ridge line direction formed by the mountain shape intersects the longitudinal direction. A liquid crystal display device that performs transmissive display and reflective display,
A liquid crystal layer sandwiched between a pair of substrates;
An illumination device that emits light toward the liquid crystal layer;
A first polarizing plate disposed between the lighting device and the liquid crystal layer;
A second polarizing plate disposed on the opposite side of the liquid crystal layer from the side on which the first polarizing plate is disposed;
A film made of aluminum, disposed between the liquid crystal layer and the lighting device;
The film is not disposed, has a shape having a longitudinal direction and a short direction, and a region through which light is transmitted in the transmissive display,
A prism sheet having a prism structure located between the illumination device and the film, wherein the film side surface has a mountain shape in a one-dimensional direction and includes a plurality of inclined surfaces formed by the mountain shape. And having
The liquid crystal display device, wherein the prism sheet is arranged so that a ridge line direction formed by the mountain shape intersects the longitudinal direction.   A liquid crystal display device according to any one of claims 1 to 3,
  A pair of intersecting electrodes;
  A pixel portion defined by a region where the electrodes overlap,
  The liquid crystal display device, wherein the longitudinal direction is formed along a long side of the pixel portion.   A liquid crystal display device according to any one of claims 1 to 3,
  A signal line;
  Scanning lines;
  A pixel portion partitioned by the signal line and the scanning line;
  The liquid crystal display device, wherein the longitudinal direction is formed along a long side of the pixel portion. An electronic device liquid crystal display device according to any one of claims 1 to 5, characterized in that it comprises a display unit.

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