WO2015111343A1 - Panneau de cristaux liquides et dispositif d'affichage à cristaux liquides - Google Patents

Panneau de cristaux liquides et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2015111343A1
WO2015111343A1 PCT/JP2014/083882 JP2014083882W WO2015111343A1 WO 2015111343 A1 WO2015111343 A1 WO 2015111343A1 JP 2014083882 W JP2014083882 W JP 2014083882W WO 2015111343 A1 WO2015111343 A1 WO 2015111343A1
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liquid crystal
domain
region
light
pixel
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PCT/JP2014/083882
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English (en)
Japanese (ja)
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篤吉 粟
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堺ディスプレイプロダクト株式会社
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Publication of WO2015111343A1 publication Critical patent/WO2015111343A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells

Definitions

  • the present invention relates to a liquid crystal panel and a liquid crystal display device including a pixel region having a plurality of domains.
  • the liquid crystal display device includes a liquid crystal panel and a backlight unit.
  • the liquid crystal panel includes a color filter and a TFT substrate.
  • the liquid crystal is sealed between the color filter and the TFT substrate.
  • the color filter includes a light-transmitting glass substrate and a BM (black matrix) formed on one surface of the glass substrate.
  • the BM is a light shielding layer provided with a large number of openings.
  • a liquid crystal panel including a multi-pixel having a plurality of sub-pixels has been proposed.
  • Each subpixel is provided with a plurality of domains by orientation division (see Patent Document 1).
  • a plurality of domains may be provided by orientation division.
  • one pixel corresponds to one opening.
  • one subpixel and one opening in the BM correspond to each other, or one subpixel and one part obtained by dividing one opening into a plurality correspond to each other.
  • a case where one normal pixel or sub-pixel and one opening correspond to each other will be exemplified.
  • an area corresponding to the opening in the liquid crystal panel is referred to as a pixel area.
  • the boundary region of the domain is a so-called dark line, and has lower translucency than the inner region of the domain. For this reason, it is desirable that the light shielding member is disposed on the dark line or outside the pixel region. However, the light shielding member may be disposed in the inner region of the domain. This is because, for example, in the case of the liquid crystal display device described in Patent Document 1, a low-luminance area (“domain line” in the text) in the internal area of each domain is blinded by a light-shielding member.
  • the pixel area has a rectangular shape, and each domain has a rectangular shape in which the pixel area is divided into two or four.
  • the translucent region of the domain is a region excluding the region shielded by the light shielding member in the inner region of the domain.
  • the present invention has been made in view of such circumstances, and a main object thereof is to provide a liquid crystal panel and a liquid crystal display device capable of improving viewing angle characteristics.
  • the liquid crystal panel according to the present invention is a liquid crystal panel including a pixel region having a plurality of domains in which liquid crystal alignment directions are different from each other, and a light shielding member disposed in the pixel region.
  • a wide range is shielded from a domain having a large area except for a region shielded by a light shielding member other than the one light shielding member, and a narrow range is shielded from a domain having a small area. It is arranged as follows.
  • the liquid crystal panel according to the present invention is characterized in that the one light shielding member is an auxiliary capacitance electrode.
  • colored layers of different colors are arranged in at least two of the pixel regions, and in a pixel region where a colored layer of one color is arranged, In a pixel region in which the area of the exclusion region is larger than the area of the exclusion region of another domain and a colored layer of another color is arranged, the area of the exclusion region of the domain corresponding to the one domain is It is characterized by being smaller than the area of the exclusion region of the domain corresponding to the domain.
  • the liquid crystal display device includes the liquid crystal panel according to the present invention and an illumination device that illuminates the liquid crystal panel from the back side.
  • the liquid crystal panel when the exclusion region of each domain is wide (or narrow), the liquid crystal panel is designed such that this domain is shielded from a wide (or narrow) range by one light shielding member.
  • the area of the light transmitting region of each domain is adjusted by one light shielding member.
  • region of each of the some domain in a pixel area becomes substantially equal.
  • the domain exclusion region is a region excluding a region shielded by a light-shielding member other than one light-shielding member in an internal region of the domain.
  • the designer of the liquid crystal panel adjusts the shape and / or arrangement position of one light-shielding member according to the size of the excluded area of each domain.
  • Such adjustment is simpler than adjusting the shapes and / or arrangement positions of all the light-shielding members according to the size of the exclusion region of each domain, for example. Therefore, there is no possibility that the burden on the designer is unnecessarily increased.
  • the area of the translucent region of each domain is adjusted by adjusting the shape and / or arrangement position of the auxiliary capacitance electrode.
  • the auxiliary capacitance electrode has a high degree of freedom in terms of shape, arrangement position, etc., compared to other light shielding members to be arranged in the pixel region. For this reason, the various characteristics regarding the video display of a liquid crystal display device can be improved simply. Even if the viewing angle characteristics of the liquid crystal display device are improved when the area of the light-transmitting region of each domain is adjusted by adjusting the shape and / or arrangement position of other light-shielding members, There is a possibility that the characteristics of the above deteriorate.
  • the area of the light transmitting region of each domain is adjusted by one light shielding member for each pixel region having a different color of the colored layer. For this reason, the areas of the light-transmitting regions of the plurality of domains in the pixel region are substantially equal regardless of the color of the colored layer.
  • the area of the light-transmitting region of each domain is adjusted by one light-shielding member. For this reason, the viewing angle characteristic of a liquid crystal display device can be improved.
  • FIG. 1 is a cross-sectional view schematically showing the configuration of the liquid crystal display device 4 according to Embodiment 1 of the present invention.
  • a hatched portion is a portion having non-translucency.
  • a portion indicated by cross hatching is a non-pixel region 52 in each TFT layer 12 described later.
  • the liquid crystal display device 4 of the present embodiment is configured as a television receiver or a display.
  • the liquid crystal display device 4 displays a color image using RGB three primary colors.
  • the liquid crystal display device 4 includes a liquid crystal panel 41 and a backlight unit (illumination device) 42.
  • the backlight unit 42 is a direct type or edge light type lighting device.
  • the backlight unit 42 constitutes the rear side of the liquid crystal display device 4.
  • the backlight unit 42 illuminates the front side of itself.
  • FIG. 2 is a plan view schematically showing the configuration of the liquid crystal panel 41 included in the liquid crystal display device 4.
  • hatched portions are shaded portions. However, hatching for the non-pixel region 52 is omitted.
  • the liquid crystal panel 41 will be described with reference to FIGS. 1 and 2.
  • the liquid crystal panel 41 constitutes the front side of the liquid crystal display device 4.
  • the liquid crystal panel 41 has a rectangular display area and a rectangular frame-shaped frame area surrounding the display area.
  • the display area of the liquid crystal panel 41 is provided with a large number of multi-pixels having two sub-pixels.
  • FIG. 2 shows multi-pixel RGB 3 pixels (that is, one picture element of multi-pixel).
  • the liquid crystal panel 41 includes a TFT substrate 1, a color filter 2, a diffusion plate 31, polarizing plates 32 and 34, a liquid crystal 33, a protective glass 35, and a sealing portion 36.
  • the diffusion plate 31, the polarizing plate 32, the TFT substrate 1, the liquid crystal 33, the color filter 2, the polarizing plate 34, and the protective glass 35 are arranged in this order from the back side to the front side in front of the backlight unit 42.
  • Each of the diffusion plate 31 and the polarizing plate 32 has translucency and has a rectangular shape.
  • the polarizing plate 32 is laminated on the rear surface of the glass substrate 11 described later of the TFT substrate 1.
  • the diffusion plate 31 is laminated on the rear surface of the polarizing plate 32.
  • the TFT substrate 1 includes a glass substrate 11, a TFT layer 12, and an alignment film 13.
  • the glass substrate 11, the TFT layer 12, and the alignment film 13 are arranged in this order from the back side to the front side.
  • the glass substrate 11 has translucency and has a rectangular shape.
  • a TFT layer 12 is laminated on the front surface of the glass substrate 11. Details of the configuration of the TFT layer 12 will be described later.
  • an alignment film 13 having translucency is laminated.
  • the color filter 2 includes a glass substrate 21, a BM 22, RGB layers 23, 23,..., A transparent electrode portion 24, and an alignment film 25.
  • the glass substrate 21, the BM 22 and the RGB layers 23, 23,..., The transparent electrode part 24, and the alignment film 25 are arranged in this order from the front side to the rear side.
  • the glass substrate 21 has translucency and has a rectangular shape.
  • a BM 22 is laminated on the rear surface of the glass substrate 21.
  • each opening 26 is closed by the RGB layer 23.
  • Each RGB layer 23 is a translucent colored layer having any one of the three primary colors RGB. Note that the liquid crystal display device 4 may have a configuration in which each opening 26 is closed with a translucent colored layer having any one color of RGBY4 color or RGBW4 color instead of the RGB layer 23.
  • Each opening 26 constitutes one sub-pixel having any one of RGB three primary colors.
  • a set of two openings 26 and 26 adjacent to each other in the vertical direction (hereinafter simply referred to as a set of openings 26 and 26) constitutes one multi-pixel.
  • a region corresponding to each opening 26 in the liquid crystal panel 41 is referred to as a pixel region 51, and portions other than the pixel regions 51, 51,... In the liquid crystal panel 41 are referred to as non-pixel regions 52. That is, each pixel region 51 includes an opening 26 and portions located on the front side and the back side of the opening 26.
  • the non-pixel region 52 includes a light shielding layer portion other than the openings 26, 26,... Of the BM 22 and portions located on the front side and the rear side of the light shielding layer portion.
  • the pixel areas 51, 51,... And the non-pixel area 52 in the TFT layer 12 are indicated by lead lines.
  • the openings 26, 26,... are not completely rectangular and are not congruent with each other.
  • the pair of openings 26 and 26 are mirror images of each other.
  • the pair of openings 26, 26 located on the leftmost side shown in FIG. 2 is a rectangular shape in which the upper opening 26 is cut out in a rectangular shape at the upper right corner, and the lower opening 26 is It is a rectangular shape with the lower right corner cut out into a rectangular shape.
  • the leftmost opening 26 shown in FIG. 2 is shorter in the vertical direction than the openings 26 and 26 located in the second and third positions from the left side, but is longer in the left-right direction. It's long.
  • each opening 26 is appropriately designed for each pair of openings 26 and 26 so as to satisfy a predetermined design condition.
  • the pixel region 51 corresponding to the leftmost opening 26 illustrated in FIG. 2 is referred to as a pixel region 51 r when distinguished from other pixel regions 51.
  • the pixel areas 51 and 51 corresponding to the openings 26 and 26 located second and third from the left are referred to as pixel areas 51g and 51b, respectively.
  • the RGB layer 23 arranged in the pixel region 51r has an R color.
  • the RGB layer 23 arranged in the pixel region 51g (or the pixel region 51b) has G color (or B color).
  • the transparent electrode portion 24 functions as a common electrode facing a pixel electrode (described later) of the TFT substrate 1.
  • an alignment film 25 having translucency is laminated on the rear surface of the transparent electrode portion 24.
  • a rectangular polarizing plate 34 is stacked on the front surface of the glass substrate 21.
  • a rectangular protective glass 35 is laminated on the front surface of the polarizing plate 34.
  • the polarizing plates 32 and 34 transmit linearly polarized light orthogonal to each other.
  • the TFT substrate 1 and the color filter 2 are arranged to face each other so that the alignment film 13 of the TFT substrate 1 and the alignment film 25 of the color filter 2 face each other.
  • the sealing portion 36 has a rectangular frame shape having a light shielding property.
  • the sealing portion 36 is bonded to the frame regions of the TFT substrate 1 and the color filter 2 between the TFT substrate 1 and the color filter 2. Since the sealing portion 36 is interposed between the TFT substrate 1 and the color filter 2, the TFT substrate 1 and the color filter 2 are bonded via the sealing portion 36.
  • the liquid crystal 33 has translucency and is disposed between the TFT substrate 1 and the color filter 2 and in a space surrounded by the sealing portion 36. In other words, the liquid crystal 33 is sealed between the TFT substrate 1 and the color filter 2 by the sealing portion 36.
  • the arrangement of liquid crystal molecules constituting the liquid crystal 33 is determined by the surface shape of the alignment films 13 and 25. At this time, alignment division is performed so that each pixel region 51 has four regions (that is, domains) having different alignment directions of liquid crystal molecules.
  • the four domains are referred to as a first domain 531, a second domain 532, a third domain 533, and a fourth domain 534, respectively.
  • the first domain 531, the second domain 532, the third domain 533, and the fourth domain 534 are individual regions obtained by dividing the pixel region 51 into two in the vertical and horizontal directions, and the alignment directions of the liquid crystals are different from each other.
  • the first domain 531 constitutes the upper left portion of the pixel region 51.
  • the second domain 532 (the third domain 533 or the fourth domain 534) constitutes the lower left portion (lower right portion or upper right portion) of the pixel region 51.
  • the pixel region 51 includes a linear dark line 541 extending in the vertical direction and a linear dark line 542 extending in the left-right direction (illustrated by a two-dot chain line in FIG. 2).
  • the dark lines 541 and 542 are boundary regions of the first domain 531, the second domain 532, the third domain 533, and the fourth domain 534, and are cross-like lines that divide the pixel region 51 into four equal parts in the vertical and horizontal directions. It is arranged in.
  • the TFT layer 12 includes a plurality of TFTs and pixel electrodes (not shown). Each TFT has a light shielding property, and each pixel electrode has a light transmitting property. Each of the TFT and the pixel electrode has a one-to-one correspondence with the pixel region 51.
  • the TFT is arranged so as to overlap the gate wiring portion 17 described later in the non-pixel region 52 in the vicinity of the pixel region 51. That is, the front side of the TFT is shielded from light by the light shielding layer portion of the BM 22, and the rear side is shielded from light by the gate wiring portion 17.
  • the pixel electrode is disposed in the pixel region 51 and faces the opening 26 of the color filter 2 (and thus the RGB layer 23 closing the opening 26).
  • the drain electrode and the pixel electrode of the TFT for each pixel region 51 are electrically connected in a one-to-one correspondence via the drain wiring portion 18 described later.
  • the TFT layer 12 includes a plurality of Cs electrode portions (auxiliary capacitance electrodes) 14, 14,..., A plurality of first Cs wiring portions 151, 151,..., A second Cs wiring portion 152, 152,. , 4Cs wiring portions 154, 154,..., 5Cs wiring portions 155, 155,..., Source wiring portions 16, 16,..., And gate wiring portions 17, 17,. .. Are provided.
  • Each Cs electrode section 14, first Cs wiring section 151, second Cs wiring section 152, third Cs wiring section 153, fourth Cs wiring section 154, fifth Cs wiring section 155, source wiring section 16, gate wiring section 17, and drain wiring section 18 is a light-shielding member. It is desirable that the light shielding member is disposed in the non-pixel region 52 or on the dark lines 541 and 542. This is because if a light shielding member is disposed in the non-pixel region 52, there is no possibility that the light shielding member inhibits light transmission in the pixel region 51. In addition, if a light shielding member is provided on the dark lines 541 and 542 having low translucency, the adverse effects of the light shielding member can be ignored.
  • the Cs electrode unit 14 is for keeping the voltage applied to the liquid crystal 33 constant, and therefore it does not make sense to arrange it in the non-pixel region 52.
  • the length in the left-right direction of the Cs electrode portion 14 is longer than the width of the dark line 541, and the length in the vertical direction of the Cs electrode portion 14 needs to be longer than the width of the dark line 542. At least a part must be arranged in the pixel region 51 other than the dark lines 541 and 542. As described above, there is a case where a light shielding member has to be disposed in the pixel region 51 other than the dark lines 541 and 542.
  • the regions other than the region shielded by the light-shielding member are translucent. It is called an area. Further, the areas of the light transmitting regions of the first domain 531 to the fourth domain 534 are represented by Sa1 to Sa4. Further, of the internal regions of each of the first domain 531 to the fourth domain 534, the region excluding the region shielded by the light shielding member other than the Cs electrode portion 14 is referred to as an exclusion region. Furthermore, the areas of the excluded regions of the first domain 531 to the fourth domain 534 are represented by Sb1 to Sb4.
  • the liquid crystal panel 41 is designed such that the areas Sa1 to Sa4 of the light transmitting regions of the first domain 531 to the fourth domain 534 are as large as possible. Further, as will be described later, the liquid crystal panel 41 is designed so that the difference between the areas Sa1 to Sa4 of the first domain 531 to the fourth domain 534 falls within a predetermined range.
  • each source wiring portion 16 is arranged from the display region to the frame region in the non-pixel region 52 between the two pixel regions 51, 51 adjacent in the left-right direction. It is not arranged in the pixel regions 51, 51,.
  • the source electrode of the TFT in each pixel region 51 is electrically connected to any one of the source wiring portions 16, 16,.
  • each gate wiring portion 17 is provided between two pixel areas 51 and 51 related to a multi-pixel (between the pixel areas 51r and 51r, between the pixel areas 51g and 51g in FIG. In the non-pixel region 52 (between the regions 51b and 51b), the region extends from the display region to the frame region.
  • the gate wiring part 17 may be arranged also at the upper end part or the lower end part of the two pixel areas 51, 51 related to the multi-pixel.
  • a gate wiring portion is arranged at the upper end portion or the lower end portion of each of the pixel regions 51g and 51b. Therefore, in the upper pixel regions 51g and 51b, the lower end portions of the second domains 532 and the lower end portions of the third domains 533 are shielded from light by the gate wiring portion 17, and the lower pixel regions 51g and 51b are respectively The upper end portion of the first domain 531 and the upper end portion of the fourth domain 534 are shielded from light by the gate wiring portion 17.
  • the gate electrode of the TFT in each pixel region 51 is electrically connected to any one of the gate wiring portions 17, 17,.
  • Each of the drain wiring portions 18, 18,... is electrically connected to the drain electrode of the TFT in the non-pixel region 52, and the other end portion is electrically connected to the pixel electrode in the pixel region 51. ing.
  • the portion disposed in the pixel region 51 related to the drain wiring portion 18 is disposed on the dark line 541.
  • the portion disposed in the pixel region 51 related to the drain wiring portion 18 is mainly disposed on the dark line 541, but partially in the first domain 531 to the fourth domain 534. Of at least one of them.
  • each first Cs wiring portion 151 is located between the two pixel regions 51, 51 related to the multi-pixel (above and below the upper pixel regions 51r, 51g, 51b in FIG. 2). In the non-pixel area 52 below the pixel areas 51r, 51g, and 51b, the non-pixel area 52 extends from the display area to the frame area.
  • the second Cs wiring portions 152, 152,... are arranged on the dark line 541 of the pixel region 51r or the pixel region 51g, one for each of the pixel regions 51r, 51g.
  • One end of each second Cs wiring part 152 is electrically connected to the first Cs wiring part 151.
  • the other end of the second Cs wiring part 152 is electrically connected to the Cs electrode part 14.
  • the third Cs wiring parts 153, 153,... And the fourth Cs wiring parts 154, 154,... are arranged on the dark line 542, one for each pixel region 51.
  • the right end portion of each third Cs wiring portion 153 is electrically connected to the Cs electrode portion 14.
  • the left end of each fourth Cs wiring part 154 is electrically connected to the Cs electrode part 14.
  • Two fifth Cs wiring portions 155, 155,... are provided for each of the two pixel regions 51b, 51b related to the multi-pixel, on the dark line 542 of each pixel region 51b and in the first domain 531 to the fourth domain 534. It is arranged over at least two.
  • One Cs electrode portion 14, 14,... Is arranged for each pixel region 51. More specifically, the Cs electrode portion 14 of each pixel region 51 is disposed on the intersection of the dark lines 541 and 542. For this reason, the first domain 531 is partially shielded by the upper left portion of the Cs electrode portion 14. Similarly, the second domain 532, the third domain 533, and the fourth domain 534 are partially shielded by the lower left portion, the lower right portion, and the lower left portion of the Cs electrode portion 14. At this time, the Cs electrode portion 14 is arranged so that the areas Sa1 to Sa4 of the light transmission regions of the first domain 531 to the fourth domain 534 are equal.
  • FIG. 3 is a schematic plan view for explaining the arrangement of the Cs electrode portions 14 in the pixel region 51 provided in the liquid crystal panel 41.
  • FIG. 4 is a schematic plan view for explaining the arrangement of the Cs electrode portions 14 in the pixel region 51 provided in the conventional liquid crystal panel. In FIGS. 3 and 4, hatched portions are shaded portions.
  • the configuration of the conventional liquid crystal panel shown in FIG. 4 is substantially the same as the configuration of the liquid crystal panel 41.
  • the conventional liquid crystal panel and the liquid crystal panel 41 are different in the arrangement position of the Cs electrode portion 14.
  • 3 and 4 show the upper pixel region 51r.
  • the shapes of the first domain 531 to the fourth domain 534 and the Cs electrode portion 14 are simplified. 3 and 4 do not show a light shielding member other than the Cs electrode portion 14.
  • the areas Sb1 to Sb4 of the excluded regions of the first domain 531 to the fourth domain 534 have a relationship of Sb1 ⁇ Sb4> Sb2 ⁇ Sb3. That is, the areas Sb1 to Sb4 of the excluded regions are unequal.
  • the Cs electrode unit 14 is arranged so that the centroid of the Cs electrode unit 14 and the intersections of the dark lines 541 and 542 coincide. Accordingly, the areas Sa1 to Sa4 of the light transmitting regions of the first domain 531 to the fourth domain 534 have a relationship of Sa1 ⁇ Sa4> Sa2 ⁇ Sa3. That is, the areas Sa1 to Sa4 of the light-transmitting regions are not uniform.
  • the non-uniformity of the areas Sa1 to Sa4 of the light-transmitting regions is the non-uniformity to the extent that the difference in area between the areas Sa1 to Sa4 of the light-transmitting regions adversely affects the viewing angle characteristics.
  • the Cs electrode portion 14 related to the upper pixel region 51r is disposed above the position where the Cs electrode portion 14 illustrated in FIG. 4 is disposed, as illustrated in FIG.
  • the arrangement position of the Cs electrode portion 14 is shifted upward as compared with the conventional case.
  • the first domain 531 and the fourth domain 534 in which the areas Sb1 and Sb4 of the exclusion region are large are shielded from a relatively wide range by the Cs electrode unit 14, and the second domain 532 in which the areas Sb2 and Sb3 of the exclusion region are small.
  • each of the third domains 533 is shielded from light in a relatively narrow range by the Cs electrode unit 14.
  • the first domain 531 and the fourth domain 534 shown in FIG. 3 each have a light-transmitting region narrower than the first domain 531 and the fourth domain 534 shown in FIG. 4, and the second domain 532 shown in FIG.
  • Each of the third domains 533 has a wider light-transmitting region than each of the second domain 532 and the fourth domain 534 shown in FIG.
  • the areas Sa1 to Sa4 of the first domain 531 to the fourth domain 534 related to the upper pixel region 51r have a relationship of Sa1 ⁇ Sa2 ⁇ Sa3 ⁇ Sa4. That is, the areas Sa1 to Sa4 of the light transmitting region are substantially equal.
  • the uniformity of the areas Sa1 to Sa4 of the light-transmitting regions is equal to the extent that the difference in area between the areas Sa1 to Sa4 of the light-transmitting regions does not adversely affect the viewing angle characteristics.
  • the areas Sb1 to Sb4 of the first domain 531 to the fourth domain 534 are Sb1 ⁇ Sb4 ⁇ Sb2 ⁇ It has a relationship of Sb3. That is, the areas Sb1 to Sb4 of the excluded regions are unequal.
  • the Cs electrode portion 14 related to the upper pixel region 51g (or the lower pixel region 51r) is disposed below the conventional arrangement position.
  • the arrangement position of the Cs electrode portion 14 is shifted downward as compared with the conventional case.
  • the first domain 531 and the fourth domain 534 each having a small area Sb1 and Sb4 of the excluded region are shielded from a relatively narrow range by the Cs electrode unit 14, and the second domain 532 having a large area Sb2 and Sb3 of the excluded region.
  • each of the third domains 533 is shielded from light in a relatively wide range by the Cs electrode portion 14.
  • the areas Sa1 to Sa4 of the first domain 531 to the fourth domain 534 relating to the upper pixel area 51g (or the lower pixel area 51r) have the relationship of Sa1 ⁇ Sa2 ⁇ Sa3 ⁇ Sa4. Have. That is, the areas Sa1 to Sa4 of the light transmitting region are substantially equal.
  • the non-uniformity of the areas Sb1 to Sb4 of the excluded regions differs for each pixel region 51 (Sb1 ⁇ Sb4 ⁇ Sb2 ⁇ Sb3 in the upper pixel region 51r, but the upper pixel region 51g And Sb1 ⁇ Sb4> Sb2 ⁇ Sb3 in each of the lower pixel regions 51r). If the arrangement position of the Cs electrode portion 14 is designed as in the prior art, the non-uniformity of the areas Sa1 to Sa4 of the translucent region cannot be eliminated.
  • the arrangement positions of the Cs electrode portions 14 are designed so that the areas Sa1 to Sa4 of the light-transmitting regions are equal for each pixel region 51. For this reason, in any pixel region 51, the difference in area between the areas Sa1 to Sa4 of the light transmitting region is suppressed from adversely affecting the viewing angle characteristics.
  • the Cs electrode part 14 is a capacitor having two electrode parts arranged opposite to each other in the front-rear direction.
  • the backlight unit 42 illuminates the liquid crystal panel 41 from the rear side (back side).
  • the light emitted from the backlight unit 42 is diffused by passing through the diffusion plate 31.
  • the diffused light passes through the polarizing plate 32 and then enters the TFT substrate 1.
  • the light incident on the TFT substrate 1 passes through the glass substrate 11, the pixel electrode, and the alignment film 13 in order, and then enters the liquid crystal 33.
  • the light incident on the liquid crystal 33 passes through the liquid crystal 33 as it is.
  • the light transmitted through the liquid crystal 33 enters the color filter 2.
  • the light incident on the color filter 2 passes through the alignment film 25, the transparent electrode portion 24, the RGB layers 23, 23,... Closing the openings 26, 26,.
  • the light transmitted through the liquid crystal 33 as it is is emitted from the color filter 2 and then blocked by the polarizing plate 34.
  • the light polarized by the liquid crystal 33 is emitted from the color filter 2, then sequentially passes through the polarizing plate 34 and the protective glass 35, and is emitted to the outside. As a result, a color image is displayed in the display area of the liquid crystal panel 41.
  • the liquid crystal panel 41 includes multi-pixels and the alignment is divided. Moreover, the areas Sa1 to Sa4 of the first domain 531 to the fourth domain 534 in each pixel region 51 are substantially equal. For this reason, the viewing angle characteristics are improved compared to the case where the pixel is not a multi-pixel, the alignment is not divided, or the areas Sa1 to Sa4 of the light-transmitting regions are not uniform.
  • the areas Sa1 to Sa4 of the light-transmitting regions are substantially equal for all the pixel regions 51, 51,..., But are not limited to this.
  • the areas Sa1 to Sa4 of the translucent regions may be uneven.
  • the number of subpixels is not limited to two.
  • the number of domains is not limited to four.
  • the liquid crystal panel 41 includes multi-pixels
  • the present invention is not limited to this, and the liquid crystal panel 41 may include normal pixels that are not multi-pixels.
  • the case where one subpixel of the multi-pixel and the opening 26 correspond to each other is illustrated, but the present invention is not limited to this.
  • a configuration in which one subpixel and a portion obtained by dividing one opening into a plurality of portions may correspond to each other.
  • boundaries between pixel regions related to a plurality of subpixels in one opening are set by a gap provided in the transparent electrode, for example.
  • the designer of the liquid crystal display device 4 adjusts the arrangement position of the dark lines 541 and 542 and the shape, area, and / or arrangement position of the Cs electrode portion 14 to thereby adjust the area of the light transmitting region.
  • Sa1 to Sa4 are made substantially equal. This is because the arrangement positions of the dark lines 541 and 542 and the shape and arrangement position of the Cs electrode portion 14 have a higher degree of design freedom than the other parts constituting the pixel region 51. Attempts have been made to make the areas Sa1 to Sa4 of the light-transmitting regions substantially equal by adjusting the arrangement positions of the dark lines 541 and 542. However, it may not be possible to equalize to the extent that the viewing angle characteristics are not adversely affected only by adjusting the arrangement positions of the dark lines 541 and 542.
  • the designer further adjusts the shape and / or arrangement position of the Cs electrode portion 14. It is easy to adjust the shape and / or arrangement position of the Cs electrode part 14, and even if the shape and / or arrangement position of the Cs electrode part 14 is adjusted in order to improve the viewing angle characteristic, the viewing angle characteristic is obtained. It is unlikely that other characteristics will deteriorate.
  • the Cs electrode portion 14 is a member that exists in the past. That is, it is not necessary to add a new light-shielding member only to make the areas Sa1 to Sa4 of the light-transmitting regions substantially equal.
  • FIG. FIG. 5 is a plan view schematically showing the configuration of the liquid crystal panel 41 provided in the liquid crystal display device 4 according to Embodiment 2 of the present invention.
  • FIG. 5 corresponds to FIG.
  • the first Cs wiring portion 151 and the gate wiring portion 17 are not shown in FIG.
  • the liquid crystal display device 4 of the present embodiment has substantially the same configuration as the liquid crystal display device 4 of the first embodiment.
  • differences from the first embodiment will be described, and other parts corresponding to those of the first embodiment are denoted by the same reference numerals and description thereof will be omitted.
  • Each source wiring portion 16 of the first embodiment is linear in the vertical direction and is arranged in the non-pixel area 52 between the pixel areas 51 and 51 adjacent in the horizontal direction.
  • each source wiring portion 16 of the present embodiment is bent halfway, and is arranged across the third domain 533 of the left pixel region 51 and the first domain 531 of the right pixel region 51. .
  • This is because the capacitance between the drain electrode and source wiring portions 16 and 16 of the TFT in the pixel region 51 and the drain electrode and source wiring portion 16 of the TFT in the pixel regions 51 and 51 adjacent to the pixel region 51 in the left-right direction. This is because the capacities between the 16 are matched.
  • the areas Sb1 to Sb4 of the excluded regions of the first domain 531 to the fourth domain 534 shown in FIG. 5 have a relationship of Sb2>Sb4>Sb3> Sb1. That is, the areas Sb1 to Sb4 of the excluded regions are unequal. Therefore, a Cs electrode unit 141 is arranged in the pixel region 51 instead of the Cs electrode unit 14 of the first embodiment.
  • the arrangement position of the Cs electrode portion 141 is shifted downward as compared with the case where the complete rectangular Cs electrode portion is arranged so that the centroid and the intersections of the dark lines 541 and 542 coincide with each other. Further, the Cs electrode portion 141 has a shape as if the portion above the dark line 542 related to the complete rectangular Cs electrode portion is shifted to the right side and the portion below the dark line 542 is shifted to the left side. It is.
  • the areas Sa1 to Sa4 of the light transmission regions of the first domain 531 to the fourth domain 534 have a relationship of Sa1 ⁇ Sa2 ⁇ Sa3 ⁇ Sa4. That is, the areas Sa1 to Sa4 of the light transmitting region are substantially equal.
  • the liquid crystal display device 4 as described above has improved viewing angle characteristics like the liquid crystal display device 4 of the first embodiment.
  • the liquid crystal display device 4 or the liquid crystal panel 41 may include components that are not disclosed in the first and second embodiments.
  • the constituent elements (technical features) disclosed in each embodiment can be combined with each other, and a new technical feature can be formed by the combination.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Liquid Crystal (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)

Abstract

La présente invention porte sur un panneau de cristaux liquides et sur un dispositif d'affichage à cristaux liquides qui peuvent améliorer des caractéristiques de champ de vision. Dans un panneau de cristaux liquides (41), des différences de surface d'une région d'émission de lumière, qui est une région autre que des régions protégées de la lumière par des éléments de protection contre la lumière (partie d'électrode CS (14), seconde partie de câblage CS (152), et autre dans la FIG. 2), pour chacun d'un premier domaine (531) - quatrième domaine (534) dans une région de pixel (51) sont maintenues dans une plage prescrite. En d'autres termes, les surfaces des régions d'émission de lumière sont sensiblement égales. En effet, il s'avère que la surface de la région d'émission de lumière pour chaque domaine est réglée par un élément de protection contre la lumière (partie d'électrode CS (14) dans la FIG. 2). C'est-à-dire, lorsque la région exclue, qui est une région excluant les régions protégées par des éléments de protection contre la lumière autres que le premier élément de protection contre la lumière, de chaque domaine est grande (ou petite), ce domaine est protégé par le premier élément de protection contre la lumière sur une grande (ou petite) surface. Ainsi, dans le panneau de cristaux liquides (41), des caractéristiques d'angle de vision sont améliorées plus que lorsque les surfaces des régions d'émission de lumière sont inégales.
PCT/JP2014/083882 2014-01-27 2014-12-22 Panneau de cristaux liquides et dispositif d'affichage à cristaux liquides WO2015111343A1 (fr)

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JP2014012418 2014-01-27

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009109767A (ja) * 2007-10-30 2009-05-21 Sharp Corp 液晶表示装置
WO2009130908A1 (fr) * 2008-04-25 2009-10-29 シャープ株式会社 Dispositif d'affichage à cristaux liquides
WO2012093621A1 (fr) * 2011-01-06 2012-07-12 シャープ株式会社 Dispositif d'affichage à cristaux liquides

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009109767A (ja) * 2007-10-30 2009-05-21 Sharp Corp 液晶表示装置
WO2009130908A1 (fr) * 2008-04-25 2009-10-29 シャープ株式会社 Dispositif d'affichage à cristaux liquides
WO2012093621A1 (fr) * 2011-01-06 2012-07-12 シャープ株式会社 Dispositif d'affichage à cristaux liquides

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