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1. (WO2017065745) PRIVACY BACKLIGHT MODULE

Pub. No.:    WO/2017/065745    International Application No.:    PCT/US2015/055256
Publication Date: Fri Apr 21 01:59:59 CEST 2017 International Filing Date: Wed Oct 14 01:59:59 CEST 2015
IPC: G02B 6/10
G02B 5/04
G02F 1/1335
Applicants: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventors: CHU, Wei-kuang
WU, Kuan-ting
CHANG, Chi-hao (james)
Title: PRIVACY BACKLIGHT MODULE
Abstract:
In one example, a privacy backlight module is described which includes a first light guide plate having first prismatic structures formed on a first bottom surface. Each first prismatic structure includes a first inclined surface and a second inclined surface connected to the first inclined surface. The privacy backlight module includes a second light guide plate disposed above or below the first light guide plate and having second prismatic structures formed on a second bottom surface. Each second prismatic structure includes a third inclined surface and a fourth inclined surface connected to the third inclined surface. The privacy backlight module includes a first light source disposed along a left surface of the first light guide plate and a second light source disposed along a right surface of the second light guide plate.