LIQUID CRYSTAL DISPLAY DEVICE

• Main Authors: TSUNEKAWA TAKEYUKI, TOGAWA HITOMI, IWATA YOSHIAKI
• Format: Patent
• Language: English; Japanese
• Published: 21.09.2017
• Subjects: ADVERTISING; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; DISPLAYING; EDUCATION; FREQUENCY-CHANGING; LABELS OR NAME-PLATES; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a liquid crystal display device having an injection-molded panel on a viewing side of a polarizing plate, in which visibility of the device is ensured even when the device is observed through polarizing sunglasses.SOLUTION: The liquid crystal display device has an image display region when viewed from a viewing side, and the device includes a liquid crystal cell A, a polarizing plate B disposed on the viewing side of the liquid crystal cell A, and a backlight light source C having a continuous emission spectrum. An injection-molded panel D is disposed on the viewing side of the polarizing plate B, and a retardation film E is disposed between the polarizing plate B and the injection-molded panel D, in which the retardation film E has an in-plane retardation ReE (nm) satisfying 3000<ReE≤100000, and the retardation film is disposed in such a manner that an angle formed by a slow axis of the retardation film E and an absorption axis of the polarizing plate B ranges from 35 to 55°. The in-plane retardation ReE of the retardation film E and an in-plane retardation maximum ReD (nm) of the injection-molded panel D in the image display region satisfy a relationship of ReE-ReD≥3000.SELECTED DRAWING: Figure 2 【課題】偏光板の視認側に射出成形パネルを備えた液晶表示装置に関し、偏光サングラスを装着して観察した場合でも、視認性を確保することができる液晶表示装置を提供する。【解決手段】視認側から見た際に画像表示領域を備えており、液晶セルＡと、液晶セルＡの視認側に配された偏光板Ｂと、連続的な発光スペクトルを有するバックライト光源Ｃと、を備えた液晶表示装置において、偏光板Ｂの視認側に射出成形パネルＤを配すると共に、偏光板Ｂと射出成形パネルＤとの間に位相差フィルムＥを配し、位相差フィルムＥは、３０００ｎｍ＜ＲｅＥ≦１０００００ｎｍを満たす面内位相差ＲｅＥを有し、且つ、位相差フィルムＥの遅相軸と偏光板Ｂの吸収軸とのなす角度が３５〜５５°となるように配し、且つ、画像表示領域における位相差フィルムＥの面内位相差ＲｅＥと射出成形パネルＤの面内位相差最大値ＲｅＤとがＲｅＥ−ＲｅＤ≧３０００ｎｍの関係にある。【選択図】図２