# US 8,570,477 B2 · Liquid crystal display device and substrate for liquid crystal display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,570,477 B2 - Document ID: US8570477B2 - Status: Granted - Kind: B2 - Application number: 13/613,836 - Filed: 2012-09-13 - Published: 2013-06-27 - Granted: 2013-10-29 - Earliest claimed: 2000-09-27 - Assignees: Sharp Kabushiki Kaisha - Applicants: Shingo Kataoka; Arihiro Takeda; Takahiro Sasaki; Tsutomu Seino; Yoshio Koike; Hidefumi Yoshida; Yuichi Inoue; Kazutaka Hanaoka; Seiji Tanuma; Takatoshi Mayama; Kimiaki Nakamura; Hideo Chida; Seiji Doi; Tetsuya Fujikawa; Takashi Takagi; Hiroyasu Inoue - Inventors: Shingo Kataoka; Arihiro Takeda; Takahiro Sasaki; Tsutomu Seino; Yoshio Koike; Hidefumi Yoshida; Yuichi Inoue; Kazutaka Hanaoka; Seiji Tanuma; Takatoshi Mayama; Kimiaki Nakamura; Hideo Chida; Seiji Doi; Tetsuya Fujikawa; Takashi Takagi; Hiroyasu Inoue - Web page: https://patentgrep.com/patent/US8570477B2 ## CPC - G02F 1/134309: {characterised by their geometrical arrangement} - G02F 1/133528: {Polarisers} - G02F 1/1337: Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers - G02F 1/133707: {Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes} - G02F 1/1362: Active matrix addressed cells {(G02F1/134336, G02F1/134363 take precedence)} - G02F 1/139: based on orientation effects in which the liquid crystal remains transparent - G02F 1/1393: {the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells (G02F1/1396, G02F1/141 take precedence)} - 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 ## Abstract A substrate for a liquid crystal display device, including a pixel electrode formed on the substrate, wherein the pixel electrode includes a micro-cutout pattern defined by a plurality of micro-cutouts extending in four different directions with respect to an extension direction of a rough structural pattern. The substrate also includes a first electrode extending in a first direction, a second electrode extending in a second direction that is approximately perpendicular to the first direction, and a contact hole that electrically connects the pixel electrode and the first electrode. A portion of the rough structural pattern and/or a portion of the micro-cutout pattern overlap the first electrode. Also disclosed is a liquid crystal display device including such a substrate. ## Claims ### Claim 1 A liquid crystal display device comprising: a first substrate; a second substrate facing said first substrate; a liquid crystal layer sealed between said first substrate and said second substrate; a pixel electrode formed on said first substrate, wherein said pixel electrode includes a micro-cutout pattern defined by a plurality of micro-cutouts extending in four different directions with respect to an extension direction of a rough structural pattern; a first electrode extending in a first direction; a second electrode extending in a second direction, wherein said second direction is approximately perpendicular to the first direction; and a contact hole that electrically connects said pixel electrode and said first electrode, and wherein a portion of the rough structural pattern of said pixel electrode overlaps said first electrode. ### Claim 2 (depends on 1) The liquid crystal display device according to claim 1, wherein said first electrode comprises a scan electrode or an auxiliary capacitance electrode. ### Claim 3 (depends on 2) The liquid crystal display device according to claim 2, wherein said second electrode comprises a signal electrode. ### Claim 4 (depends on 1) The liquid crystal display device according to claim 1, further comprising: a plurality of said first electrodes extending in said first direction, wherein said first electrodes comprise scan electrodes; a plurality of said second electrodes extending in said second direction, wherein said second electrodes comprise signal electrodes; and a plurality of first electrode pads formed at ends of said first electrodes, wherein said first electrode pads are located outside of a perimeter defined by said plurality of said first electrodes and said plurality of said second electrodes. ### Claim 5 (depends on 4) The liquid crystal display device according to claim 4, further comprising a plurality of second electrode pads formed at ends of said second electrodes, wherein said second electrode pads are located outside of the perimeter defined by said plurality of said first electrodes and said plurality of said second electrodes. ### Claim 6 (depends on 1) The liquid crystal display device according to claim 1, wherein said rough structural pattern is generally cross-shaped. ### Claim 7 (depends on 1) The liquid crystal display device according to claim 1, further comprising: a facing electrode formed on said second substrate; a first molecule orientation film formed on said first substrate so as to cover said pixel electrode; a second molecule orientation film formed on said second substrate so as to cover said facing electrode; a polarizer provided outside of said first substrate, said polarizer having a light absorption axis P; an analyzer provided outside of said second substrate, said analyzer having a light absorption axis A, wherein the light absorption axis A of said analyzer crosses the light absorption axis P of said polarizer. ### Claim 8 (depends on 1) The liquid crystal display device according to claim 1, wherein in a non-driving state in which a driving voltage is not applied between said first electrode and said facing electrode, liquid crystal molecules are oriented in a vertical direction to surfaces of said first and second substrates by said first molecule orientation film and said second molecule orientation film, respectively. ### Claim 9 (depends on 1) The liquid crystal display device according to claim 1, wherein a tilt direction of liquid crystal molecules in the presence of an applied voltage is controlled by an optical hardened material within said liquid crystal layer. ### Claim 10 (depends on 1) The liquid crystal display device according to claim 1, wherein said micro-cutouts extending in four different directions define four different domains, respectively, and further wherein said micro-cutouts within each domain are generally parallel to each other. ### Claim 11 (depends on 1) The liquid crystal display device as claimed in claim 1, wherein said liquid crystal layer comprises liquid crystal with negative inductive factor anisotropy. ### Claim 12 A liquid crystal display device comprising: a first substrate; a second substrate facing said first substrate; a liquid crystal layer sealed between said first substrate and said second substrate; a pixel electrode formed on said first substrate, wherein said pixel electrode includes a micro-cutout pattern comprising a plurality of micro-cutouts extending in four different directions with respect to an extension direction of a rough structural pattern; a first electrode extending in a first direction; a second electrode extending in a second direction, wherein said second direction is approximately perpendicular to the first direction; and a contact hole that electrically connects said pixel electrode and said first electrode, and wherein a portion of said micro-cutout pattern of said pixel electrode overlaps said first electrode. ### Claim 13 (depends on 12) The liquid crystal display device according to claim 12, wherein said first electrode comprises a scan electrode or an auxiliary capacitance electrode. ### Claim 14 (depends on 12) The liquid crystal display device according to claim 12, wherein said rough structural pattern is generally cross-shaped. ### Claim 15 (depends on 12) The liquid crystal display device according to claim 12, further comprising: a facing electrode formed on said second substrate; a first molecule orientation film formed on said first substrate so as to cover said pixel electrode; a second molecule orientation film formed on said second substrate so as to cover said facing electrode; a polarizer provided outside of said first substrate, said polarizer having a light absorption axis P; an analyzer provided outside of said second substrate, said analyzer having a light absorption axis A, wherein the light absorption axis A of said analyzer crosses the light absorption axis P of said polarizer. ### Claim 16 (depends on 12) The liquid crystal display device according to claim 12, wherein in a non-driving state in which a driving voltage is not applied between said first electrode and said facing electrode, liquid crystal molecules are oriented in a vertical direction to surfaces of said first and second substrates by said first molecule orientation film and said second molecule orientation film, respectively. ### Claim 17 (depends on 12) The liquid crystal display device according to claim 12, wherein a tilt direction of liquid crystal molecules in the presence of an applied voltage is controlled by an optical hardened material within said liquid crystal layer. ### Claim 18 (depends on 12) The liquid crystal display device according to claim 12, wherein said micro-cutouts extending in four different directions define four different domains, respectively, and further wherein said micro-cutouts within each domain are generally parallel to each other. ### Claim 19 A substrate for a liquid crystal display device, comprising: a pixel electrode formed on said substrate, wherein said pixel electrode includes a micro-cutout pattern defined by a plurality of micro-cutouts extending in four different directions with respect to an extension direction of a rough structural pattern; a first electrode extending in a first direction; a second electrode extending in a second direction, wherein said second direction is approximately perpendicular to the first direction; and a contact hole that electrically connects said pixel electrode and said first electrode, and wherein a portion of the rough structural pattern of said pixel electrode overlaps said first electrode. ### Claim 20 (depends on 19) The substrate for a liquid crystal display device according to claim 19, further comprising: a plurality of said first electrodes extending in said first direction, wherein said first electrodes comprise scan electrodes; a plurality of said second electrodes extending in said second direction, wherein said second electrodes comprise signal electrodes; and a plurality of first electrode pads formed at ends of said first electrodes, wherein said first electrode pads are located outside of a perimeter defined by said plurality of said first electrodes and said plurality of said second electrodes.