LED display backlight structure with fixed light-emitting angle

• Main Authors: YUAN JIANZHONG, WEI WEI, JIANG ZHIRONG
• Format: Patent
• Language: Chinese; English
• Published: 12.04.2022
• 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 relates to an LED display backlight structure with a fixed light-emitting angle, which comprises a PCB lamp panel, a plurality of LED lamp beads are uniformly distributed on the PCB lamp panel, an LENS optical lens is arranged above each LED lamp bead, so that light emitted by the LED lamp beads is emitted by the LENS optical lenses at a fixed angle, a diffusion sheet is arranged above the LENS optical lenses, and the LED lamp beads are arranged on the diffusion sheet. The diffusion sheet is arranged on the base and used for uniformly scattering light emitted from a fixed angle, the brightness enhancement sheet is arranged above the diffusion sheet and used for gathering the uniformly scattered light to the fixed angle, and the liquid crystal glass is arranged above the brightness enhancement sheet and used for emitting the light gathered to the fixed angle to the screen to enable the brightness of the screen to be uniform at the fixed angle. According to the structure, the brightness of an unne