REFLECTION TYPE LIQUID CRYSTAL DISPLAY ELEMENT

• Main Author: YAMADA YUMIKO
• Format: Patent
• Language: English
• Published: 19.09.1997
• Edition: 6
• Subjects: 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; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a reflection type liquid crystal display element having high reflectivity, a wide visual field angle and high reliability. SOLUTION: This reflection type liquid crystal display element is constituted by disposing an array substrate formed with pixel electrodes 2 having an oriented film 5a on the surface and a counter substrate formed with counter electrodes 7 having an oriented film 5b on the surface opposite to each other via prescribed spacings and sealing liquid crystals 5 into the spacing therebetween. The pixel electrodes 2 of the element described above are formed of metals. Many microprojections 8 are regularly arranged at the boundaries between the pixel electrodes 2 and the oriented film 5a. The pretilt angles of the liquid crystals are adjusted by the directions and angles of the ridge lies of these microprojections 8. The microprojections 8 are formed to pyramidal shapes and the average angle of inclination of the gentlest ridge lines thereof is specified to >=6 to <=11 deg., by which the high reflectivity is embodied.