JP2018189707A - 液晶表示装置 - Google Patents
液晶表示装置 Download PDFInfo
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- JP2018189707A JP2018189707A JP2017089663A JP2017089663A JP2018189707A JP 2018189707 A JP2018189707 A JP 2018189707A JP 2017089663 A JP2017089663 A JP 2017089663A JP 2017089663 A JP2017089663 A JP 2017089663A JP 2018189707 A JP2018189707 A JP 2018189707A
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Abstract
Description
VR等では、動画を視ることが多いので、液晶の応答速度を速める必要があるが、このためには、液晶材料が限定される。
コンタクトホールCHは隣り合う2本の映像信号線SLの間の中央に形成されており、映像信号線SLが図中左右(第1方向X)に蛇行しており、映像信号線SLの蛇行に合わせてコンタクトホールCHの位置も左右に移動し、第2方向Yに対して左側に移動したコンタクトホールCHと右側に移動したコンタクトホールCHとが形成されている。以下、左側に移動したコンタクトホールCHを左移動コンタクトホールCHLと呼び、右側に移動したコンタクトホールCHを右移動コンタクトホールCHRと呼ぶ。
スリット構造は右側のスリット境界E3Rと左側のスリット境界E3Lを有しており、スリット構造の第1方向Xの幅を最も広くし、かつコンタクトホールCHとスリット境界が重ならないためには、左移動コンタクトホールCHLの右側の縁に近接して右側のスリット境界E3Rが形成され、右移動コンタクトホールCHRの左側の縁に近接して左側のスリット境界E3Lが形成される。
図14Cでは、図14A同様に隣合う2つの映像信号線SLの間に、スリット構造が形成され、スリット構造の内部に第二の電極E2を形成されている。さらには、図14Aよりもスリット境界が隣接画素から離間している。
図14Cに示すように、図中上側から左移動コンタクトホールCHLに近接する右側のスリット境界E3Rは、左移動コンタクトホールCHLの右側の縁を避けるように、第2方向Yに対して第2角度−θの方向から第2方向Yに沿うように方向を変え(右側のスリット境界E3Rの第2方向Yに対する角度の絶対値が小さくなり、スリット構造の第1方向Xの幅が広がる)、左移動コンタクトホールCHLを越えると一旦第2角度−θ方向にもどり、走査線GL近傍で映像信号線SLに対して第1の角度θよりも大きな角度に向きを変え、ブラックマトリクスBMの開口に近接すると映像信号線SLに対して第1の角度θで傾き、第二の電極E2に沿って右移動コンタクトホールCHRを越えるまで、第1の角度θの方向に進む。さらに走査線GL近傍で、映像信号線SLに対して第2の角度−θよりも大きな角度に向きを変え、ブラックマトリクスBMの開口に近接すると映像信号線SLに対して第2の角度−θで傾く。なお、スリット境界が第1の角度θよりも大きな角度で傾く部分に対向する第二の電極E2も第1の角度θよりも大きな角度で傾いている。
さらに、図中上側から左移動コンタクトホールCHLに近接する左側のスリット境界E3Lは、左移動コンタクトホールCHLを越えるまで、第2の角度−θの方向に進み、走査線GL近傍で、映像信号線SLに対して第1の角度θよりも大きな角度に向きを変え、ブラックマトリクスBMの開口に近接すると映像信号線SLに対して第1の角度θで傾き第二の電極E2に沿って、右移動コンタクトホールCHRに向かい、右移動コンタクトホールCHRに近接すると、右移動コンタクトホールCHRの左側の縁を避けるように、第2方向Yに対して第1角度θの方向から第2方向Yに沿うように方向を変え(左側のスリット境界E3Lの第2方向Yに対する角度の絶対値が小さくなり、スリット構造の第1方向Xの幅が広がる)、右移動コンタクトホールCHRを越えると一旦第1角度θ方向にもどり、走査線GL近傍で映像信号線SLに対して第2の角度−θよりも大きな角度に向きを変え、ブラックマトリクスBMの開口に近接すると映像信号線SLに対して第2の角度−θで傾く。
図14Cの構成とすることで、スリット構造の内部に第二の電極E2を形成し、スリット境界を隣接する第二の電極E2から十分に離間して形成することが可能になる。
Claims (20)
- 第1の方向に延在する複数の走査線と、前記第1の方向に交差する第2の方向に延在する複数の映像信号線を有し、前記映像信号線と前記走査線とで囲まれた領域に画素が形成された液晶表示装置であって、
前記画素は薄膜トランジスタ、前記薄膜トランジスタを覆う平坦化膜、前記平坦化膜の上に形成された第1の電極、絶縁膜を介して前記第1の電極の上に形成された第2の電極、前記平坦化膜に形成された前記第1の電極と前記薄膜トランジスタを接続するためのコンタクトホールを有し、
前記第2の電極は複数の画素について共通に形成され、かつ、隣接する2本の前記映像信号線間にスリットを有し、
前記スリットは、前記第2の方向に配列する複数の前記画素に対して連続して形成されていることを特徴とする液晶表示装置。 - 前記スリットは、前記第2の方向と第1の角度をなす方向に延在し、前記走査線と交差した後、前記第2の方向と第2の角度をなす方向に延在することを特徴とする請求項1に記載の液晶表示装置。
- 前記スリットの前記コンタクトホール付近における前記第1の方向の幅は、前記映像信号線と平行に延在する部分における前記スリットの前記第1の方向の幅よりも大きいことを特徴とする請求項1に記載の液晶表示装置。
- 前記コンタクトホールは前記スリット内に存在していることを特徴とする請求項1に記載の液晶表示装置。
- 前記コンタクトホールは深さDEPを有し、前記コンタクトホールの底から前記DEP/2の位置における前記コンタクトホールの幅は、前記スリットの前記コンタクトホール付近における幅よりも小さいことを特徴とする請求項1に記載の液晶表示装置。
- 前記スリットは、前記コンタクトホールを迂回して形成されていることを特徴とする請求項1に記載の液晶表示装置。
- 前記コンタクトホールは深さDEPを有し、前記スリットは、前記コンタクトホールの底から前記DEP/2の位置におけるコンタクトホールの内壁よりも前記第1の方向において外側に形成されていることを特徴とする請求項1に記載の液晶表示装置。
- 前記コンタクトホールの前記第1の方向の中心は前記画素の前記第1の方向の中心と一致していることを特徴とする請求項1に記載の液晶表示装置。
- 前記コンタクトホールの前記第1の方向の中心は前記画素の前記第1の方向の中心に対して1μm以上ずれていることを特徴とする請求項1に記載の液晶表示装置。
- 前記画素は、前記第1の電極よりも下層にカラーフィルタを含むことを特徴とする請求項1に記載の液晶表示装置。
- 前記第1の電極は前記TFTと導電体である台座層を介して接続し、前記映像信号線と前記台座層は別層に形成されていることを特徴とする請求項1に記載の液晶表示装置。
- 前記スリットは前記画素内に1個形成されていることを特徴とする請求項1に記載の液晶表示装置。
- 前記液晶表示装置に使用される液晶は正の誘電率異方性を有することを特徴とする請求項1に記載の液晶表示装置。
- 第1の方向に延在する走査線と、前記第1の方向と直角な方向である第2の方向と角度θ1をなす方向に延在し、前記走査線と交差した後、前記第2の方向と角度−θ1をなす方向に延在する映像信号線を有し、前記映像信号線と前記走査線とで囲まれた領域に画素が形成された液晶表示装置であって、
前記画素は薄膜トランジスタ(TFT)、前記TFTを覆う平坦化膜、前記平坦化膜の上に形成された第1の電極、第1の絶縁膜を介して前記第1の電極の上に形成された第2の電極、第2の絶縁膜を介して前記第2の電極の上に第3の電極と、前記平坦化膜に形成された前記第2の電極と前記TFTを接続するためのコンタクトホールを有し、
前記第1の電極は複数の画素について共通に形成され、
前記第3の電極は複数の画素について共通に形成され、かつ、前記映像信号線と平行に延在するスリットを有し、
前記スリットは、前記第2の方向に配列する複数の前記画素に対して連続して形成されていることを特徴とする液晶表示装置。 - 前記第1の電極と前記第3の電極はコモン電極であり、前記第2の電極は画素電極であることを特徴とする請求項14に記載の液晶表示装置。
- 前記第1の電極は前記コンタクトホール内には形成されていないことを特徴とする請求項14に記載の液晶表示装置。
- 前記スリットは、前記走査線の付近において前記第2の方向に対して、前記θ1よりも角度が大きくなるように屈曲していることを特徴とする請求項14に記載の液晶表示装置。
- 前記スリットの前記コンタクトホール付近における前記第1の方向の幅は、前記映像信号線と平行に延在する部分における前記スリットの前記第1の方向の幅よりも大きいことを特徴とする請求項14に記載の液晶表示装置。
- 前記コンタクトホールは前記スリット内に存在していることを特徴とする請求項14に記載の液晶表示装置。
- 前記スリットは、前記コンタクトホールを迂回して形成されていることを特徴とする請求項14に記載の液晶表示装置。
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