JP2006323280A - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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JP2006323280A
JP2006323280A JP2005148197A JP2005148197A JP2006323280A JP 2006323280 A JP2006323280 A JP 2006323280A JP 2005148197 A JP2005148197 A JP 2005148197A JP 2005148197 A JP2005148197 A JP 2005148197A JP 2006323280 A JP2006323280 A JP 2006323280A
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liquid crystal
crystal display
electrode
substrate
display element
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JP2005148197A
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JP5017677B2 (en
Inventor
Norihiro Arai
Kunpei Kobayashi
Toshiharu Nishino
君平 小林
則博 荒井
利晴 西野
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Casio Comput Co Ltd
カシオ計算機株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device of variable viewing angle capable of controlling the viewing angle into sufficient broadness and sufficient narrowness. <P>SOLUTION: The liquid crystal display device is provided with: a liquid crystal display element 10 in which a liquid crystal layer 13 having liquid crystal molecules subjected to homogeneous alignment so as to align molecular long axes in one direction is disposed between a pair of substrates 11, 12, a plurality of pixel parts (A) formed in an elongated shape along the direction intersecting at a predetermined angle with respect to the molecular long axes of the liquid crystal molecules subjected to homogeneous alignment and formed by a plurality of electrode pairs composed of first and second electrodes 14a, 14b adjacent to each other are disposed as a matrix array on the inner surface of one side substrate 12, and a counter electrode 24 facing the first and second electrodes 14a, 14b of the plurality of electrode pairs is disposed on the inner surface of the other substrate 11; and a display drive means selectively applying a drive voltage in accordance with an image data either between the first and second electrodes 14a, 14b of the respective electrode pairs of the liquid crystal display element 10 or between the first and second electrodes 14a, 14b of the respective electrode pairs, and the counter electrode 24 thereof. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device with a variable viewing angle.

  As a liquid crystal display device of variable viewing angle type, conventionally, a liquid crystal layer in which liquid crystal molecules are homogeneously aligned with their molecular long axes aligned in one direction is provided between a pair of substrates facing each other with a gap between them. A pixel in which a plurality of electrode pairs each composed of a first elongate electrode and a second elongate electrode, which are adjacent to each other at an interval, are arranged on the inner surface of one substrate among the inner surfaces facing each other in a row direction and a column. A plurality of liquid crystal display elements are provided which are arranged in a matrix in the direction and provided with a third electrode facing the one of the first and second electrodes on the inner surface of the other substrate (Patent Document). 1).

  In the liquid crystal display device, the first voltage is applied between the first and second electrodes of each pair of electrodes provided on the inner surface of one substrate of the liquid crystal display element, whereby the first voltage is applied. An image is displayed by changing the orientation direction (direction of molecular long axis) of liquid crystal molecules in a plane parallel to the substrate surface by a horizontal electric field generated between the electrode and the second electrode. Yes, it has a wide viewing angle.

In this liquid crystal display device, since the third electrode is provided on the inner surface of the other substrate of the liquid crystal display element, the liquid crystal display device is provided between one of the first and second electrodes and the third electrode. By applying a voltage, an electric field is formed in an oblique direction with respect to the substrate surface, and liquid crystal molecules respond in an oblique direction with respect to the substrate surface, so that the viewing angle can be narrowed.
Japanese Patent Laid-Open No. 11-30783

  However, the above conventional viewing angle variable liquid crystal display device has a liquid crystal layer in which liquid crystal molecules are aligned homogeneously with the molecular long axis aligned in one direction, and a lateral electric field between electrode pairs provided on one substrate. An image is displayed by changing the alignment direction of the liquid crystal molecules in a direction along the substrate surface, and between the third electrode provided on the opposing substrate and the electrode facing the third electrode of the electrode pair, Since a voltage corresponding to the voltage applied to the opposing electrodes is applied, it is difficult to control the viewing angle range sufficiently large.

  An object of the present invention is to provide a variable viewing angle type liquid crystal display device capable of controlling and controlling a sufficiently wide viewing angle range.

  The liquid crystal display device of the present invention has a liquid crystal layer having a positive dielectric anisotropy between a pair of substrates facing each other with a gap therebetween, and liquid crystal molecules are homogeneously aligned with their molecular long axes aligned in one direction. The inner surface of one of the pair of substrates facing each other is formed in an elongated shape along the direction intersecting at a predetermined angle with respect to the molecular long axis of the homogeneously aligned liquid crystal molecules. In addition, a plurality of electrode pairs composed of first and second electrodes adjacent to each other are provided, and a counter electrode facing the first and second electrodes of the plurality of electrode pairs is provided on the inner surface of the other substrate. Image data is displayed between the liquid crystal display element, between the first and second electrodes of each electrode pair of the liquid crystal display element, and between the first and second electrodes of the electrode pair and the counter electrode. Display driving means for selectively applying a driving voltage according to the And it said that there were pictures.

  The liquid crystal display device according to the present invention provides a liquid crystal display element having a liquid crystal layer in which liquid crystal molecules are aligned homogeneously with their molecular long axes aligned in one direction, and the first and first electrode pairs provided on the inner surface of one substrate. An image is displayed by applying a driving voltage according to image data between the two electrodes, and between the first and second electrodes of each electrode pair and the counter electrode provided on the inner surface of the other substrate. Image display by applying a driving voltage according to data is selectively performed, and by applying a driving voltage between the first and second electrodes of each of the electrode pairs, An image can be obtained by changing the orientation direction (the direction of the molecular long axis) of the liquid crystal molecules in a plane parallel to the substrate surface by a lateral electric field generated between the first electrode and the second electrode. The first and second electrodes of each electrode pair and the By applying a driving voltage between the counter electrode, the vertical electric field to orient the rising of the liquid crystal molecules to the substrate surface to display an image generated between these electrodes.

  When the liquid crystal display device displays an image by changing the alignment direction of the liquid crystal molecules in a direction along the substrate surface by the horizontal electric field, the liquid crystal display element exhibits a wide viewing angle characteristic, and the vertical direction The liquid crystal display element exhibits narrow viewing angle characteristics when the liquid crystal molecules are raised and aligned with respect to the substrate surface by the electric field of the liquid crystal, so that the viewing angle is controlled to be sufficiently wide and narrow. can do.

(First embodiment)
1 to 7 show a first embodiment of the present invention. FIG. 1 is a front view of an electronic apparatus equipped with a liquid crystal display device, and FIG. 2 is a view of one substrate of a liquid crystal display element of the liquid crystal display device. FIG. 3 is a sectional view of a part of the liquid crystal display element.

  First, the electronic device shown in FIG. 1 will be described. The electronic device has a telephone body 1 and a base end pivotally supported by the distal end of the telephone body 1 and extends outward from the telephone body 1 as shown in the figure. A foldable mobile phone comprising a lid 2 that is opened and closed and rotated in a closed state overlaid on the telephone body 1, and the front surface of the telephone body 1 (the overlapping surface of the lid 2). ), A keyboard unit 3 and a microphone unit 4 are provided, and a display unit 5 and a speaker unit 6 are provided on the front surface of the lid 2 (the surface facing the front surface of the telephone body 1 when folded).

  Next, the liquid crystal display device will be described. The liquid crystal display device of this embodiment includes a liquid crystal display element 10 disposed in the lid body 2 of the cellular phone so as to face the display section 5, and the inside of the lid body 2. Are provided with a surface light source 31 (see FIG. 3) disposed opposite to the side opposite to the viewing side of the liquid crystal display element 10 and display driving means 32 for driving the liquid crystal display element 10.

  The liquid crystal display element 10 has a positive dielectric anisotropy between a pair of transparent substrates 11 and 12 facing each other with a gap, and the liquid crystal molecules are aligned in a single direction in the molecular long axis in a non-twisted state. A homogeneously aligned nematic liquid crystal layer 13 is provided. Of the inner surfaces of the pair of substrates 11 and 12 facing each other, one substrate, for example, the substrate 12 opposite to the observation side (upper side in FIG. 3). A plurality of first and second electrodes 14a and 14b adjacent to each other formed in an elongated shape along a direction intersecting at a predetermined angle with respect to the molecular long axis of the homogeneously aligned liquid crystal molecules. An electrode pair is provided, and a counter electrode 24 facing the first and second electrodes 14a and 14b of the plurality of electrode pairs is provided on the inner surface of the other substrate, that is, the observation-side substrate 11.

  In this embodiment, each electrode pair on the inner surface of one substrate (hereinafter referred to as an electrode substrate) 12 of the liquid crystal display element 10 is formed in parallel at a predetermined interval and connected to each other at one end. The two first electrodes 14a, one side of one of the first electrodes 14a, and one side of the other first electrode 14a are each spaced by a half of the distance between the two first electrodes 14a. And two second electrodes 14b that are formed in parallel and connected to each other at one end. The two first electrodes 14a and the two second electrodes 14b constitute one pixel portion A. These pixel portions A are arranged in a matrix in the row direction and the column direction.

  The two first electrodes 14a are composed of a first comb-shaped conductive film formed in a comb shape having two comb teeth portions, and the two second electrodes 14b are comb shapes having two comb teeth portions. A second comb-shaped conductive film formed in a shape and arranged in a direction opposite to the first comb-shaped conductive film and shifted by a 1/2 pitch with respect to the comb-tooth portion of the first comb-shaped conductive film. Yes.

  The liquid crystal display element 10 is an active matrix liquid crystal display element having a TFT (thin film transistor) as an active element, and the two first electrodes 14a of each electrode pair are formed at one end of the first comb-shaped conductive film. The first TFTs 15a provided on the inner surface of the electrode substrate 12 so as to correspond to the electrode pairs, respectively, and the two second electrodes 14b of the electrode pairs are connected to one end of the second comb-shaped conductive film. In this section, the electrode substrate 12 is connected to a second TFT 15b provided on the inner surface of the electrode substrate 12 so as to correspond to each electrode pair.

  The first and second TFTs 15 a and 15 b include a gate electrode 16 formed on the substrate surface of the electrode substrate 12, and a transparent gate insulation formed on substantially the entire surface of the electrode substrate 12 so as to cover the gate electrode 16. A film 17; an i-type semiconductor film 18 formed on the gate insulating film 17 so as to face the gate electrode 16; and an n-type semiconductor film (not shown) on both sides of the i-type semiconductor film 18. ), The first TFT 15a is disposed on one side of each of the electrode pairs, and the second TFT 15b includes the electrode pairs. It is arranged on the opposite side.

  Further, on the inner surface of the electrode substrate 12, a plurality of first and second gate wirings 21a and 21b for supplying gate signals to the first TFT 15a and the second TFT 15b in each row, respectively, A plurality of first and second data lines 22a and 22b are provided for supplying data signals to the TFTs 15a and 15b, respectively.

  The first and second gate lines 21a and 21b are formed integrally with the gate electrode 16 of the TFTs 15a and 15b on the substrate surface of the electrode substrate 12, and the first and second data lines 22a. , 22b are formed on the gate insulating film 17 and connected to the drain electrodes 20 of the TFTs 15a, 15b.

  Further, the first transparent conductive film forming the two first electrodes 14a is formed on the gate insulating film 17 and connected to the source electrode 19 of the first TFT 15a. The second transparent conductive film forming the second electrode 14b is a transparent interlayer insulating film 23 formed on substantially the entire surface of the electrode substrate 12 so as to cover the TFTs 15a and 15b, the data wirings 22a and 22b, and the first electrode 14a. Is connected to the source electrode 19 of the second TFT 15b in a contact hole (not shown) provided in the interlayer insulating film 23.

  On the other hand, the counter electrode 24 provided on the inner surface of the observation-side substrate (hereinafter referred to as counter substrate) 11 is a single-layer transparent conductive film facing the entire array region of each electrode pair of the electrode substrate 12. Vertical regions generated between the first electrode 14 a and the second electrode 14 b of the electrode pair and the counter electrode 24, respectively, due to regions where the electrode pairs forming the pixels and the counter electrode 24 face each other. A plurality of pixel portions when an image is displayed by an electric field in the direction are formed.

  The liquid crystal display element 10 is a color image display element including three color filters 25R, 25G, and 25B of red, green, and blue corresponding to each of the plurality of pixel portions A, and the color filters 25R and 25G. 25B are formed on the substrate surface of the counter substrate 11, and the counter electrode 24 is formed thereon.

  Transparent horizontal alignment films 26 and 27 are provided on the inner surface of the counter substrate 11 and the inner surface of the electrode substrate 12 so as to cover the counter electrode 24 and the second electrode 14b of each electrode pair. The alignment films 26 and 27 are rubbed in parallel and in opposite directions.

  The pair of counter substrates 11 and the electrode substrate 12 are joined together via a frame-shaped sealing material (not shown) surrounding the array region of the electrode pairs, that is, the screen region of the liquid crystal display element 10.

  The liquid crystal layer 13 is sealed in a region surrounded by the sealing material between the counter substrate 11 and the electrode substrate 12, and the liquid crystal molecules of the liquid crystal layer 13 are aligned with the alignment films 26 and 27. It is homogeneously oriented with the molecular long axis aligned in the rubbing direction.

  The electrode substrate 12 is formed with a driver mounting portion extending outward from the counter substrate 11. The first and second gate wirings 21 a and 21 b provided on the electrode substrate 12 and the first And the second data wirings 22a and 22b and the counter electrode 24 provided on the electrode substrate 11 are driver elements 33 made of LSI mounted on the driver mounting portion via lead wirings (not shown) (see FIG. 1). It is connected to the.

  Further, polarizing plates 28 and 29 are disposed on the outer surfaces of the counter substrate 11 and the electrode substrate 12, respectively. Further, between the counter substrate 11 and the polarizing plate 28 disposed on the outer surface thereof, an external surface is provided. A single film-like transparent conductive film 30 is provided to block static electricity from the substrate.

  4 shows the rubbing directions 11a and 12a of the horizontal alignment films 26 and 27 provided on the inner surfaces of the counter substrate 11 and the electrode substrate 12 of the liquid crystal display element 10 and the transmission axes 28a and 29a of the polarizing plates 28 and 29, respectively. In this embodiment, the rubbing directions 11a and 12a of the alignment films 26 and 27 are predetermined in a clockwise direction with respect to the vertical axis O of the screen of the liquid crystal display element 10 as viewed from the observation side, for example. The direction is set to a direction shifted by the angle θ, and the direction of the transmission axis 28a of the polarizing plate 28 on the observation side is substantially 90 ° + θ shifted in the clockwise direction when viewed from the observation side with respect to the vertical axis O of the screen. That is, the orientation films 26 and 27 are set to a direction substantially shifted by 45 ° with respect to the rubbing directions 11a and 12a, and the direction of the transmission axis 29a of the polarizing plate 29 on the opposite side is set to the vertical axis O of the screen. On the right when viewed from the observation side The liquid crystal display element 10 is set as a normally white mode display element in a direction substantially shifted by 90 ° -θ, that is, in a direction substantially perpendicular to the transmission axis 28a of the observation-side polarizing plate 28. Yes.

  Further, the surface light source 31 disposed to face the opposite side of the liquid crystal display element 10 from the observation side is not shown in its configuration, but for example, a plate having an area facing the screen region of the liquid crystal display element 10. An incident end surface for allowing light to enter is formed on one end surface of the transparent member, and an exit end surface for light incident from the incident end surface is formed on one of the two plate surfaces, and incident on the other plate surface from the incident end surface A light guide plate formed with a reflection surface that reflects light toward the emission surface, and an LED (light emitting diode) that is disposed to face the incident end surface of the light guide plate and emits light toward the incident end surface It consists of a plurality of solid state light emitting devices.

  On the other hand, the display driving means 32 shown in FIG. 1 includes a driver element 33 mounted on the driver mounting section of the liquid crystal display element 10 and a control section (not shown). A viewing angle selection key 35 for selecting a viewing angle and a narrow viewing angle is provided. In this embodiment, the viewing angle selection key 35 is provided on the front surface of the lid 2, but the viewing angle selection key 35 may be provided on the telephone body 1.

  The display driving means 32 is arranged between the first and second electrodes 14a and 14b of each electrode pair of the liquid crystal display element 10 in accordance with the wide viewing by the viewing angle selection key 35 or the selection of the angle and the narrow viewing angle. The driving voltage corresponding to the image data is selectively applied to any of the first and second electrodes 14a, 14b and the counter electrode 24 of each electrode pair.

  That is, when the wide viewing angle is selected by the viewing angle selection key 35, the display driving unit 32 sequentially selects each pixel row of the liquid crystal display element 10 and first and second gates of the selected row. A gate signal is simultaneously supplied to the wirings 21a and 21b, and in synchronization therewith, a data signal corresponding to the image data is supplied to one of the first and second data wirings 22a and 22b, for example, the first data wiring 22a, By supplying a predetermined reference potential signal to the other data wiring, that is, the second data wiring 22b, a driving voltage corresponding to the image data between the first and second electrodes 14a and 14b of each electrode pair. Apply.

  Further, the display driving means 32 sequentially selects each pixel row of the liquid crystal display element 10 when a narrow viewing angle is selected by the viewing angle selection key 35, and first and second gates of the selected row. A gate signal is simultaneously supplied to the wirings 21a and 21b, and in synchronization therewith, a data signal corresponding to the image data is supplied to both the first and second data wirings 22a and 22b, and a predetermined reference is applied to the counter electrode 24. By supplying a potential signal, a driving voltage corresponding to the image data is applied between the first and second electrodes 14a and 14b and the counter electrode 24 of each electrode pair.

  5 to 7 are diagrams schematically showing the concept of the operation state of one pixel portion A of the liquid crystal display element 10 by the display driving means 32 and the alignment state of liquid crystal molecules at that time, 5 shows a state in which no voltage is applied, FIG. 6 shows a state in which a driving voltage is applied between the first and second electrodes 14a and 14b of each electrode pair, and FIG. 7 shows the first and second electrodes of each electrode pair. The drive voltage is applied between 14a, 14b and the counter electrode 24. 5-7, (a) is the alignment state of the liquid crystal molecules in the cross-sectional direction of the liquid crystal display element 10, (b) is the alignment state of the liquid crystal molecules viewed from the observation side of the liquid crystal display element 10, The orientation direction of the liquid crystal molecules (the direction of the molecular major axis) viewed from the normal direction of the substrates 11 and 12 is shown.

  As shown in FIGS. 5 to 7, the display driving means 32 includes a signal source 34 that generates a voltage signal corresponding to image data, and a voltage signal from the signal source 34 as a first electrode of each electrode pair. First and second electrodes 14a and 14b for selective application between the first electrode 14a and the second electrode 14b, and between the first and second electrodes 14a and 14b of each electrode pair and the counter electrode 24. A second switch S1, S2 is used.

  The liquid crystal molecules 13a of the pixel portions A of the liquid crystal display element 10 are aligned in one direction as shown in FIG. 5 when no voltage is applied with the first and second switches S1 and S2 open. To make homogeneous orientation. In this embodiment, since the liquid crystal display element 10 is a normally white mode display element, the display of the pixel portion A to which no voltage is applied is a bright display.

  Then, when the second switch S2 is closed and a driving voltage is applied between the first and second electrodes 14a and 14b of each of the electrode pairs, the liquid crystal molecules 13a are displaced from the homogeneous orientation of FIG. As shown in FIG. 6, the horizontal electric field generated between the first electrode 14a and the second electrode 14b changes the orientation in a plane parallel to the surface of the electrode substrate 12, and the pixel portion is aligned. The display of A becomes dark.

  When the first switch S1 is closed and a driving voltage is applied between the first and second electrodes 14a and 14b of the electrode pairs and the counter electrode 24, the liquid crystal molecules 13a are 5, the vertical electric field generated between the first and second electrodes 14a and 14b of each electrode pair and the counter electrode 24 causes the substrate 11 and 12 surfaces to be in contact with each other as shown in FIG. As a result, the pixel portion A is darkly displayed.

  As described above, the liquid crystal display device includes the liquid crystal display element 10 having the liquid crystal layer 13 in which the liquid crystal molecules 13a are aligned homogeneously with the molecular long axis aligned in one direction. Image display by applying a drive voltage according to image data between the first and second electrodes 14a, 14b of the electrode pair, the first and second electrodes 14a, 14b of each electrode pair and the other substrate 11 Image display by selectively applying a driving voltage according to image data between the counter electrode 24 provided on the inner surface of the first electrode and the first electrode of each of the electrode pairs. By applying a driving voltage between the second electrodes 14a and 14b, the alignment direction of the liquid crystal molecules 13a is changed by the lateral electric field generated between the first electrode 14a and the second electrode 14b. Along 12 sides The image is displayed by changing the direction, and a drive voltage is applied between the first and second electrodes 14a and 14b of each electrode pair and the counter electrode 24, thereby generating a vertical direction between these electrodes. The liquid crystal molecules 13a are raised and aligned with respect to the surfaces of the substrates 11 and 12 by the electric field to display an image.

  In the liquid crystal display device, the liquid crystal display element 10 has a wide viewing angle characteristic when the image is displayed by changing the alignment direction of the liquid crystal molecules 13a in the direction along the surfaces of the substrates 11 and 12 by the horizontal electric field. The liquid crystal display element 10 exhibits a narrow viewing angle characteristic when the liquid crystal molecules 13a are raised and aligned with respect to the surfaces of the substrates 11 and 12 by the vertical electric field to display an image.

  That is, this liquid crystal display device displays an image by changing the alignment state of the liquid crystal molecules 13a of the liquid crystal display element 10 from the homogeneous alignment state in a plane parallel to the surfaces of the substrates 11 and 12 by application of a lateral electric field. A wide viewing angle display, and a narrow viewing angle display in which the liquid crystal molecules 13a of the liquid crystal display element 10 are raised and changed from the homogeneous alignment state by applying a vertical electric field to display an image. Therefore, the viewing angle can be controlled to be sufficiently wide and narrow.

  Therefore, the mobile phone of FIG. 1 equipped with this liquid crystal display device displays an address display such as a telephone number of the display unit 5 and an e-mail display with a wide viewing angle so that it can be viewed by a plurality of people, It can be displayed with a narrow viewing angle so that it cannot be seen.

  Note that the liquid crystal display device can be used not only for mobile phones but also for electronic devices having other display units.

  In the liquid crystal display device of the above embodiment, the liquid crystal display element 10 is a normally white mode display element in which the transmission axes 28a and 29a of the pair of polarizing plates 28 and 29 are substantially orthogonal to each other. The display element 10 may be a normally black mode display element in which the transmission axes 28a and 29a of the polarizing plates 28 and 29 are substantially parallel.

(Second Embodiment)
8 and 9 show a second embodiment of the present invention. FIG. 8 is a plan view of a part of one substrate of a liquid crystal display element of a liquid crystal display device, and FIG. 9 is a cross section of a part of the liquid crystal display element. FIG. In this embodiment, parts corresponding to those of the first embodiment described above are given the same reference numerals in the drawings, and the description of the same parts is omitted.

  In the liquid crystal display device of this embodiment, the first and second electrodes 14a and 14b constituting the electrode pairs on the inner surface of the electrode substrate 12 (for example, the substrate opposite to the observation side) of the liquid crystal display element 10 are as follows: The first electrode 14a on the substrate surface is formed in a shape corresponding to the entire pixel portion A, and the second electrode 14b on the interlayer insulating film 23 is formed in a comb-shaped conductive film having a smaller pitch than that of the first embodiment. For example, it is formed of a comb-shaped conductive film having four comb teeth, and the other configuration is the same as that of the first embodiment.

  In this liquid crystal display device, each electrode pair on the inner surface of the electrode substrate 12 of the liquid crystal display element 10 is formed with a first electrode 14a having a shape corresponding to the entire pixel portion A and a pitch smaller than that of the first embodiment. And a plurality of (four in this embodiment) second electrodes 14b adjacent to each other in the horizontal direction by applying a drive voltage between the first and second electrodes 14a and 14b of each electrode pair. An electric field is generated at a small pitch, and liquid crystal molecules in most regions of the pixel portion A are aligned along the surfaces of the substrates 11 and 12 to obtain a high contrast display, and the first and second electrodes of each of the electrode pairs. By applying a driving voltage between the electrodes 14a and 14b and the counter electrode 24, a vertical electric field is generated in the entire pixel portion A, and liquid crystal molecules are uniformly raised and aligned over the entire pixel portion A to display high contrast. Can get .

  Therefore, according to the liquid crystal display device of this embodiment, the viewing angle can be controlled to a sufficient width and a sufficient narrowness as in the first embodiment, and the narrow viewing field can also be displayed in the wide viewing angle display. High contrast can be obtained even in the case of corner display.

The front view of the electronic device provided with the liquid crystal display device. 1 is a plan view of a part of one substrate of a liquid crystal display element of a liquid crystal display device according to a first embodiment of the present invention. FIG. 3 is a cross-sectional view of a part of the liquid crystal display element. The figure which shows the rubbing direction of the horizontal alignment film | membrane provided in the inner surface of a pair of board | substrate of the said liquid crystal display element, respectively, and the direction of the transmission axis of a polarizing plate. The figure which shows typically the concept of the operation state of one pixel part of the liquid crystal display element by the display drive means in a no-voltage application state, and the orientation state of the liquid crystal molecule at that time. The concept of the operation state of one pixel portion of the liquid crystal display element by the display driving means in a state where the drive voltage is applied between the first and second electrodes of each electrode pair, and the alignment state of the liquid crystal molecules at that time are schematically shown. FIG. The concept of the operating state of one pixel portion of the liquid crystal display element by the display driving means in a state where a driving voltage is applied between the first and second electrodes and the counter electrode of each electrode pair, and the liquid crystal molecules at that time The figure which shows an orientation state typically. The top view of a part of one board | substrate of the liquid crystal display element of the liquid crystal display device which shows 2nd Example of this invention. Sectional drawing of a part of liquid crystal display element of a 2nd Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display element 11, 12 ... Board | substrate, 13 ... Liquid crystal layer, 13a ... Liquid crystal molecule, 14a ... 1st electrode, 14b ... 2nd electrode, 15a, 15b ... TFT, 21a, 21b ... Gate wiring, 22a , 22b ... data wiring, 23 ... interlayer insulating film, 24 ... counter electrode, 25R. 25G, 25B: Color filter, 26, 27 orientation film, 28, 29 ... Polarizing plate, 30 ... Electrostatic shielding conductive film, 31 ... Surface light source, 32 ... Display drive means, 33 ... Driver element, 34 ... Signal source, 35 ... View angle selection key.

Claims (1)

  1. A liquid crystal layer having a positive dielectric anisotropy between the pair of substrates facing each other with a gap and liquid crystal molecules aligned homogeneously with their molecular long axes aligned in one direction is provided. Of the inner surfaces facing each other, the first and second adjacent ones formed in an elongated shape along the direction intersecting at a predetermined angle with respect to the molecular long axis of the homogeneously aligned liquid crystal molecules on the inner surface of one substrate. A liquid crystal display element in which a plurality of electrode pairs each including two electrodes are provided, and a counter electrode facing the first and second electrodes of the plurality of electrode pairs is provided on the inner surface of the other substrate;
    A drive voltage corresponding to image data between the first and second electrodes of each electrode pair of the liquid crystal display element and between the first and second electrodes of each electrode pair and the counter electrode. A liquid crystal display device comprising: a display driving means for selectively applying a voltage.
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JP2009301010A (en) * 2008-06-16 2009-12-24 Samsung Electronics Co Ltd Liquid crystal display device
JP2010002504A (en) * 2008-06-18 2010-01-07 Toshiba Mobile Display Co Ltd Liquid crystal display device
JP2012103725A (en) * 2007-10-30 2012-05-31 Sharp Corp Liquid crystal device

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US8896507B2 (en) 2007-10-30 2014-11-25 Sharp Kabushiki Kaisha Liquid crystal device
JP2009301010A (en) * 2008-06-16 2009-12-24 Samsung Electronics Co Ltd Liquid crystal display device
US8760479B2 (en) 2008-06-16 2014-06-24 Samsung Display Co., Ltd. Liquid crystal display
US9348188B2 (en) 2008-06-16 2016-05-24 Samsung Display Co., Ltd. Liquid crystal display
JP2010002504A (en) * 2008-06-18 2010-01-07 Toshiba Mobile Display Co Ltd Liquid crystal display device

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