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CN-116339002-B - Liquid crystal panel

CN116339002BCN 116339002 BCN116339002 BCN 116339002BCN-116339002-B

Abstract

The problem is to suppress defective display. The liquid crystal panel (11) is provided with an array substrate (21), an opposite substrate (20) arranged opposite to the array substrate (21), a liquid crystal layer (22) clamped between the array substrate (21) and the opposite substrate (20), a plurality of pixel electrodes (24) arranged at intervals in the surface of the array substrate (21), a common electrode (25) arranged to be overlapped with the plurality of pixel electrodes (24), an insulating film (37) arranged on the upper layer side of the common electrode (25), and an orientation film (33) arranged on the upper layer side of the insulating film (37), wherein a light shielding part (29) for separating the plurality of pixel electrodes (24) is arranged on the opposite substrate (20), and a separator (30) which is overlapped with the light shielding part (29) and protrudes from the opposite substrate (20) to the liquid crystal layer (22) side are arranged on the opposite substrate (20), the orientation film (33) is connected with the common electrode (25) through an opening (37A) arranged on the insulating film (37) directly or through other components, and the orientation film (33) is arranged on the insulating film (37) at a position which is not overlapped with the separator (30).

Inventors

  • JUNICHI MORINAGA
  • Ji Yeguang

Assignees

  • 夏普显示科技株式会社

Dates

Publication Date
20260508
Application Date
20221223
Priority Date
20211224

Claims (11)

  1. 1.A liquid crystal panel, comprising: An array substrate; an opposite substrate disposed opposite to the array substrate; a liquid crystal layer sandwiched between the array substrate and the counter substrate, The array substrate is provided with a plurality of pixel electrodes arranged at intervals in the surface of the array substrate, a common electrode overlapped with the plurality of pixel electrodes, an insulating film arranged on the upper layer side of the common electrode, and an orientation film arranged on the upper layer side of the insulating film, A light shielding portion for partitioning between the plurality of pixel electrodes is provided on at least one of the array substrate and the counter substrate, and a spacer is disposed so as to overlap the light shielding portion and protrudes from the liquid crystal layer side in at least one direction of the array substrate and the counter substrate, The orientation film is connected to the common electrode directly or via other members through an opening provided in the insulating film, In the insulating film, the opening is arranged at a position which is not overlapped with the spacer and is overlapped with the light shielding part, The pixel electrode is disposed on the lower layer side of the orientation film at the upper layer side of the insulation film, The pixel electrode is constituted by a part of a transparent electrode film, In the array substrate, a connection electrode is provided as the other member, the connection electrode being constituted by a portion of the transparent electrode film different from the pixel electrode, being in contact with the orientation film, and being connected to the common electrode through the opening, The array substrate is provided with: a plurality of thin film transistors, and A plurality of first wirings extending in a first direction, the first wirings being connected to respective gate electrodes of the plurality of thin film transistors, The pixel electrodes are arranged in a plurality of rows at intervals in the first direction and in a second direction intersecting the first direction, The connection electrode is positioned between two adjacent pixel electrodes in the second direction and is connected with the common electrode through the opening, The connection electrode has: an electrode body located between two adjacent pixel electrodes in one of the first and second directions, connected to the common electrode through the opening; and an extension portion extending from the electrode body between two of the pixel electrodes adjacent to the other of the first direction and the second direction.
  2. 2. The liquid crystal panel according to claim 1, wherein, The array substrate is provided with: a plurality of thin film transistors arranged at intervals in the first direction and the second direction, respectively; A plurality of first wirings arranged at intervals in the second direction, and A plurality of second wirings extending in the second direction and intersecting the first wirings, the second wirings being arranged at intervals in the first direction, A plurality of the pixel electrodes are connected to a plurality of the thin film transistors, The first wiring is connected to a plurality of the thin film transistors arranged in the first direction, The second wiring is connected to the plurality of thin film transistors arranged in the second direction, The spacers are arranged to overlap the crossing portions of the first wiring and the second wiring, the number of the spacers is smaller than the number of the crossing portions, The opening overlaps at least one of the first wiring and the second wiring, and is arranged in parallel with the spacer along at least one of the first direction and the second direction, and the number of the openings is equal to or less than the number obtained by subtracting the number of the spacers from the number of the intersecting portions.
  3. 3. The liquid crystal panel according to claim 2, wherein the number of the openings is a number obtained by subtracting the number of the spacers from the number of the intersecting portions.
  4. 4. A liquid crystal panel according to claim 2 or 3, wherein a plurality of the spacers are disposed one for each of a plurality of the intersecting portions arranged along the first direction, and a plurality of the spacers are disposed one for each of a plurality of the intersecting portions arranged along the second direction.
  5. 5. A liquid crystal panel according to claim 2 or 3, The light shielding portion includes: a first light shielding portion extending in the first direction and overlapping the thin film transistor, the first wiring, the spacer, and the opening; And a second light shielding portion extending along the second direction, overlapping the second wiring, and having a width narrower than the first light shielding portion.
  6. 6. The liquid crystal panel according to claim 1, wherein, As the opening, the insulating film includes: a first opening between two adjacent pixel electrodes in one of the first and second directions, and A second opening located between two of the pixel electrodes adjacent to the one of the first direction and the second direction, and arranged at a position spaced apart from the first opening in the one of the first direction and the second direction, As a result of the electrode body being provided, the connection electrode includes: a first electrode body arranged to overlap the first opening and connected to the common electrode through the first opening, and A second electrode body disposed to overlap the second electrode body and connected to the common electrode through the second opening, The extension portion is connected with the first electrode body and the second electrode body.
  7. 7. The liquid crystal panel according to claim 1 or 6, wherein, The spacers are provided protruding from the counter substrate toward the liquid crystal layer side, The array substrate is provided with: a first planarization film disposed on the lower layer side of the common electrode, and A second planarization film disposed on a lower layer side of the alignment film at an upper layer side of the pixel electrode and the connection electrode, The first planarization film has a film thickness larger than that of the insulating film, is disposed so as to overlap the spacers, the common electrode, and the pixel electrode, The second planarizing film has a film thickness larger than that of the insulating film, and is disposed so as to overlap the spacers and the extending portions.
  8. 8. The liquid crystal panel according to claim 1 or 6, wherein, The common electrode includes a plurality of position detection electrodes arranged at intervals in the first direction and the second direction, A first wiring which is located between two adjacent pixel electrodes in the second direction and extends along the first direction is provided on the array substrate, The first wiring is arranged on the lower layer side than the common electrode and is positioned between two position detection electrodes adjacent in the second direction, The extension portion is located between two of the position detection electrodes adjacent in the second direction, and is disposed so as to overlap the first wiring.
  9. 9. The liquid crystal panel according to claim 8, wherein the electrode body is arranged so as not to overlap one of the two position detection electrodes adjacent in the second direction, overlaps the other position detection electrode, and is connected to the other position detection electrode.
  10. 10. The liquid crystal panel according to claim 8, wherein, The spacers are provided protruding from the counter substrate toward the liquid crystal layer side, The array substrate is provided with: a first planarization film disposed on the lower layer side of the common electrode, and A second planarization film disposed on a lower layer side of the alignment film at an upper layer side of the pixel electrode and the connection electrode, The first planarization film has a film thickness larger than that of the insulating film, is disposed so as to overlap the spacers, the common electrode, and the pixel electrode, The second planarization film has a film thickness larger than that of the insulating film, is disposed so as to overlap the spacers and the extension portions, The first wiring is disposed on a lower layer side than the first planarizing film.
  11. 11. The liquid crystal panel according to any one of claim 1, 6 and 9, wherein, The spacers are provided protruding from the counter substrate toward the liquid crystal layer side, The array substrate is provided with: a first planarization film disposed on the lower layer side of the common electrode, and A second planarization film disposed on a lower layer side of the alignment film at an upper layer side of the pixel electrode, The first planarization film has a film thickness larger than that of the insulating film, is disposed so as to overlap the spacers, the common electrode, and the pixel electrode, The second planarizing film has a film thickness larger than that of the insulating film, and is disposed so as to overlap the spacers and the extending portions.

Description

Liquid crystal panel Technical Field The technology disclosed in this specification relates to a liquid crystal panel. Background As an example of a conventional liquid crystal display device, a liquid crystal display device described in patent document 1 is known. The liquid crystal display device described in patent document 1 includes a common wiring, a gate wiring, a source wiring, and an alignment film in an outer peripheral region of a liquid crystal cell. The alignment film is insulated from the gate wiring and the source wiring via an insulating film. The common wiring has a common potential exposure portion through an opening formed in the insulating film, and is electrically connected to the alignment film. Since the common potential close to the average potential of the cell is supplied to the alignment film, it is possible to prevent defective display or deterioration of the screen due to impurity ions remaining on the surface or inside of the alignment film. Prior art literature Patent literature Japanese patent application laid-open No. 2001-330841 Disclosure of Invention Problems to be solved by the invention In the liquid crystal display device described in patent document 1, an opening is formed in the insulating film so as to electrically connect the common potential exposure portion of the common wiring to the alignment film. The alignment film has a first portion in contact with the common potential exposure portion and a second portion laminated on the insulating film, and a step is generated between the first portion and the second portion. When such a step is generated in the alignment film, alignment failure occurs in the liquid crystal molecules, and there is a concern that display failure due to the alignment failure occurs. The technology described in the present specification is completed based on the above-described situation, and an object of the present invention is to suppress defective display. Solution for solving the problem (1) The liquid crystal panel of the present embodiment includes an array substrate, a counter substrate disposed so as to face the array substrate, a liquid crystal layer interposed between the array substrate and the counter substrate, wherein a plurality of pixel electrodes arranged at intervals in a plane of the array substrate, a common electrode disposed so as to overlap the plurality of pixel electrodes, an insulating film disposed on an upper layer side of the common electrode, and an alignment film disposed on an upper layer side of the insulating film, wherein a light shielding portion for partitioning the plurality of pixel electrodes is provided on at least one of the array substrate and the counter substrate, and a spacer disposed so as to overlap the light shielding portion and protrude from at least one of the array substrate and the counter substrate toward the liquid crystal layer side is provided on the array substrate, wherein the alignment film is connected to the common electrode directly or via another member through an opening provided in the insulating film, and wherein the opening is disposed in a position not overlapping the spacer but overlapping the light shielding portion in the insulating film. (2) In addition to the above (1), the array substrate may be provided with a plurality of thin film transistors arranged at intervals in a first direction and a second direction intersecting the first direction, a plurality of first wirings extending in the first direction and arranged at intervals in the second direction, a plurality of second wirings extending in the second direction and intersecting the first wirings, a plurality of pixel electrodes arranged at intervals in the first direction and connected to the plurality of thin film transistors, the first wirings being connected to the plurality of thin film transistors arranged in the first direction, the spacers being arranged at overlapping positions of the first and second wirings in the second direction, the number of the pixel electrodes being smaller than the number of the intersecting positions of the first and second wirings, the number of the pixel electrodes being arranged at least one of the first and second wirings in the first direction, the number of the pixel electrodes being smaller than the number of the intersecting positions of the first and second wirings, the number of the pixel electrodes being arranged at least one of the first and second wirings being smaller than the number of the first wirings. (3) In the liquid crystal panel according to (2), the number of the openings is a number obtained by subtracting the number of the spacers from the number of the intersecting portions. (4) In the liquid crystal panel according to the above (2) or (3), the spacers may be arranged in one of the intersecting portions arranged along the first direction, and the spacers may be arranged in one of the intersecting portions arranged along the second direction. (5) The