REFLECTING PLATE, REFLECTION TYPE DISPLAY ELEMENT, REFLECTION TYPE DISPLAY DEVICE, AND MANUFACTURE OF REFLECTION TYPE DISPLAY ELEMENT

• Main Authors: YAMAMOTO SHIGERU, HIJI NAOKI, NINOMIYA MASANOBU, SUZUKI SADAICHI, HIKIJI TAKETO, SAGAWA SHIMIZU
• Format: Patent
• Language: English
• Published: 31.03.2000
• Edition: 7
• 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 make obtainable sufficient brightness and whiteness and to make enhancible the withstant voltage of a reflection film by widening the reflection spectrum half-value width in a reflecting plate, a reflection type display element or a reflection type display device using multiplex interference reflection. SOLUTION: A mixed soln. 13 of a photo setting polymer material and a liquid crystal is applied on a substrate 11 and is irradiated with laser beams 31, 32 from both sides, thereby forming the reflection film 14 of a volume hologram type PDLC structure on the substrate 11. A mixed soln. 23 of the photo setting polymer material and the liquid crystal is applied on a substrate 21 and is irradiated with the laser beams 31, 32 from both sides, thereby forming the reflection film 24 of the volume hologram type PDLC structure on the substrate 21. Reflection peak wavelengths of the reflection films 14 and 24 are made to be close to each other within a wavelength band of the same color to a degree that the wavelength regions of the reflection spectrum half-value widths of the reflection films 14 and 24 partially overlap by changing the incident angles or the wavelengths of the laser beams 31 and 32 when the reflection film 14 is formed and when the reflection film 24 is formed. Next, the reflection films 14 and 24 are made to butt against each other, are heated under vacuum and the substrates 11 and 21 are stuck to each other.