Direct type backlight device and display equipment

• Main Authors: ZHANG XIAOQI, LIU ZHENG, LYU XIAOXIA, HUANG XIAOYUN
• Format: Patent
• Language: Chinese; English
• Published: 21.08.2020
• 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

The invention discloses a direct type backlight device. The direct type backlight device comprises a reflecting polarizer, an optical film set, an LED light source array and a PCB driving board whichare arranged from top to bottom. The direct type backlight device further comprises a perforated reflecting plate, wherein the perforated reflecting plate is arranged below the optical film set, and light penetrating through the perforated reflecting plate is partially reflected by the reflecting polarizer and partially penetrates through the reflecting polarizer; the perforated reflecting plate is of a double-layer structure, the reflecting structure of the perforated reflecting plate on the upper layer at least corresponds to one LED light source, and the holes of the perforated reflecting plate on the lower layer at least correspond to one LED light source. The invention provides a backlight device for improving uniform light emission of an area light source, and the utilization efficiency of light is improved.