# US 11,079,624 B2 · Liquid crystal display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,624 B2 - Document ID: US11079624B2 - Status: Granted - Kind: B2 - Application number: 15/766,084 - Filed: 2017-04-10 - Published: 2018-10-11 - Granted: 2021-08-03 - Earliest claimed: 2016-04-18 - Assignees: Nitto Denko Corporation - Applicants: Nitto Denko Corporation - Inventors: Katsunori Takada; Eiko Suefusa; Yoshitsugu Kitamura; Keisuke Kimura; Seiji Umemoto - Web page: https://patentgrep.com/patent/US11079624B2 ## CPC - G02F 1/133528: {Polarisers} - G02F 1/133308: {Support structures for LCD panels, e.g. frames or bezels} - G02F 1/13363: Birefringent elements, e.g. for optical compensation - G02F 1/134309: {characterised by their geometrical arrangement} - G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00) - G02F 1/133331: {Cover glasses} - G02F 1/133541: {Circular polarisers} - G02F 1/133562: {on the viewer side} - G02F 1/133637: {characterised by the wavelength dispersion} - G02F 1/133638: {Waveplates, i.e. plates with a retardation value of lambda/n} - G02F 2201/38: Anti-reflection arrangements - G02F 2202/28: Adhesive materials or arrangements - G02F 2413/06: Two plates on one side of the LC cell - 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 - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract There is provided a liquid crystal display apparatus having the following feature: although the liquid crystal display apparatus has a step between its display screen and outermost surface, the step is hardly recognized; and the liquid crystal display apparatus can achieve bright display. A liquid crystal display apparatus according to the present invention includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a cover sheet arranged on a viewer side of the liquid crystal cell, the cover sheet having a transmission portion at a position corresponding to a display region of the liquid crystal cell; and a second polarizer arranged on a viewer side of the cover sheet to cover the transmission portion, wherein an absorption axis direction of the first polarizer and an absorption axis direction of the second polarizer are substantially perpendicular to each other. ## Claims ### Claim 1 A liquid crystal display apparatus, comprising: a liquid crystal cell having a viewer side without a polarizer directly disposed on the viewer side; a first polarizer arranged on a back surface side of the liquid crystal cell; a cover sheet arranged on the viewer side of the liquid crystal cell, the cover sheet having a transmission portion at a position corresponding to a display region of the liquid crystal cell; and a second polarizer arranged on a viewer side of the cover sheet to cover the transmission portion, wherein an absorption axis direction of the first polarizer and an absorption axis direction of the second polarizer are substantially perpendicular to each other, wherein the transmission portion does not have polarizing properties, wherein the second polarizer is a polarizer which is nearest to the liquid crystal cell, on the viewer side of the liquid crystal cell, and wherein the cover sheet is formed of a resin sheet having a thickness of 0.1 mm to 5 mm. ### Claim 2 (depends on 1) The liquid crystal display apparatus according to claim 1, further comprising: a first optical compensation layer having an Re(550) of from 100 nm to 180 nm between the cover sheet and the second polarizer; and a second optical compensation layer having an Re(550) of from 100 nm to 180 nm between the cover sheet and the liquid crystal cell. ### Claim 3 (depends on 2) The liquid crystal display apparatus according to claim 2, wherein: an angle formed by a slow axis direction of the first optical compensation layer and the absorption axis direction of the second polarizer is from 35° to 55° or from 125° to 145°; and the slow axis direction of the first optical compensation layer and a slow axis direction of the second optical compensation layer are substantially perpendicular to each other. ### Claim 4 (depends on 2) The liquid crystal display apparatus according to claim 2, wherein the first optical compensation layer and the second optical compensation layer each satisfy a relationship of Re(450)