Image display device

• Main Authors: HOJO, ATSUMASA, OKUNO, DAICHI, SAIKI, ATSUSHI, TODA, MASATOSHI, MATSUMOTO, HIROKI, MURAYAMA, YOSHIAKI
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2011
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; 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; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

The image display device includes a light guide body, a prism sheet, a primary light source, and a display panel. A reflection surface 44 of the light guide body includes first prism rows 44a. The first prism rows 44a are arranged almost parallel to each other and extend along a direction substantially perpendicular to a light incident surface 41. Convex structures 45 are scatteredly disposed on the reflection surface 44. The height of each convex structure 45 protruding from the reflection surface 44 is more than 2 m. On the refection surface 44, more than two other convex structures 45 exist inside a range of a circle taking any convex structure 45 as a center, and having a radius which is one hundred times of the height of the convex structure 45.