LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To realize a full color reflective display and a full color transmissive display without lowering reflectance and transmittance by using Bragg reflection. SOLUTION: The liquid crystal display device is provided with: a first polarizing plate 16a; a color filter layer 6 formed with a color filter substrate 15 disposed on the upper layer side; a liquid crystal layer 1 formed on a glass 18, a second polarizing plate 16b; a laminated HPDLC(holographic polymer dispersed liquid crystal) 17 consisting of three layers which is a reflection structure layer whose reflectance can be electrically switched and which is disposed on the lower layer side than the liquid crystal layer 1; and a backlight unit 3 as the lowermost layer. The individual layers of the laminated HPDLC 17 consisting of the three layers are composed of liquid drop layers of the liquid crystal and polymer layers and reflect blue, green and red light by Bragg reflection. Voltage application to the laminated HPDLC layer 17 consisting of the three layers results in variation of the refractive indexes of the liquid drop layers of the liquid crystal in the individual layers. A transparent state is attained by making refractive indexes of the liquid drop layer of the liquid crystal and the polymer layer coincide with each other.