§
Luxuse
Patent Intelligence
Sign In
Patent EP0707232A1 successfully refreshed from Google Patents.
← Back to Patent Explorer
EP0707232A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Color liquid-crystal display panel

Assignee: Japan Display Central Inc
•
Filing: 1995-10-10
•
Granted: —
•
Expires: 2015-10-10
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A color liquid-crystal display panel comprising switching elements, pixel electrodes (2), and feed wirings (46) made of plural thinfilm layers deposited on the internal surface of one of the substrates, a color filter (8) having an unevenness of more than 0.3 µm, a black mask, and a liquid-crystal layer disposed between said two substrates, wherein the length of overlap of the black-mask (7) over the color filter for every pixel is slightly different at least in a direction within a plane parallel to said substrate in order to prevent the generation of inverse tilt domain in the rub-down area became by an application if rubbing, attaining a high image quality without light leakage.

Inventors

  • 👤 Nobuyasu Yamagishi
  • 👤 Yoshitaka Yamamoto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 14:25
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/1337; G02F1/13373; G02F1/136; G02F1/1362; G02F1/136213

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 105 words
A color liquid-crystal display panel comprising; switching elements, pixel electrodes, feed wirings made of thinfilm disposed on an internal surface of a first substrate, and a color-filter having an unevenness of more than 0.3 µm and a black-mask disposed on an internal surface of a second substrate facing to said first substrate, and a liquid-crystal molecule layer sandwiched between said two substrates; wherein the lengths of overlap of said black-mask over said color filter for each pixel in a crosssectional view perpendicular to the substrate surface are different at least in one direction of left-right and up-down direction within a plane parallel to said substrate.
Claim 2
Dependent Claim 62 words
A color liquid-crystal display panel according to Claim 1 comprising: pixels disposed in an arrangement of delta, and charge storage capacitors connected to switching elements and pixel electrodes disposed on an internal surface of said first substrate; and a dot-patterned color filter disposed on an internal surface of said second substrate: wherein said storage capacitors are faced to said dot-patterned color filters.
Claim 3
Dependent Claim 92 words
A color liquid-crystal display panel according to Claim 1 provided with orientation layers disposed on each of said internal surfaces of said two substrates; wherein said liquid-crystal molecules are oriented along a predetermined direction by applying a rubbing on said orientation layers, and the length of overlap of said black-mask over said color filter in a crosssectional view perpendicular to substrate surface facing to the protruded part where the rubbing is performed downwardly is made longer than the length of overlap facing to the protruded part where the rubbing is performed upwardly.
Claim 4
Dependent Claim 36 words
A color liquid-crystal display panel according to Claim 3 wherein the length of overlap of said black-mask over said color-filter facing to the protruded part where the rubbing is performed downwardly is longer than 10 µm.
Claim 5
Dependent Claim 33 words
A color liquid-crystal display panel according to Claim 1 provided with a color filter pattened by a photolithographic process with no flattening over-coating layer disposed on an internal surface of said second substrate.

References Cited (Backward Citations)

EP0328329A2 Cited
JPH01266512A Cited
JPH0634965A Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag