TN TYPE LIQUID CRYSTAL DISPLAY ELEMENT,申请号JP19900278748-传众专利搜索

TN TYPE LIQUID CRYSTAL DISPLAY ELEMENT

申请公布号：JPH04153622(A)

申请号：JP19900278748

申请日期：1990.10.17

申请公布日期：1992.05.27

申请人：

JAPAN AVIATION ELECTRON IND LTD

发明人：KAWAHARA YUKIO

分类号：G02F1/137;G02F1/1335;G02F1/139

主分类号：G02F1/137

摘要：PURPOSE:To obtain a good visual angle characteristic which fewer phase plates by interposing one sheet of the phase plate having the optical axis in the direction nearly equal to the transmission axis direction of a 1st polarizing plate between the 1st polarizing plate and a TN type liquid crystal cell. CONSTITUTION:One sheet of the phase plate 22 having the optical axis 24 nearly equal to the transmission axis direction of the 1st polarizing plate 12 is interposed between the 1st polarizing plate 12 and the TN type liquid crystal cell 11. A retardation arises between the vibration (1st light) of the light in the optical axis 24 direction of the phase plate 22 and the vibration (2nd light) of the light in the direction orthogonal therewith and the polarization state of the light changes if incident light passes the phase plate 22. Only the 1st light vibrating in the optical axis 24 direction of the phase plate 22 is, however, transmitted, if the transmission axis directions 16, 17 of the polarizing plates 12, 13 are parallel with the optical axis 24 direction of the phase plate 22 and, therefore, the transmission quantity of the light is constant regardless of the presence or absence of the retardation. The reduction of the phase plate 22 to one sheet is possible in this way and the stage for sticking films is simplified. The production is facilitated and this initial cost is reduced.