Optical device capable of realizing high-color-gamut backlight

Abstract

The invention relates to the field of display backlights, in particular to an optical device capable of realizing a high-color-gamut backlight. The optical device capable of realizing the high-color-gamut backlight comprises an optical lens and an LED light source placed in a groove of the bottom of the optical lens, wherein the LED light source is formed by packaging a single chip which does not contain fluorescent powder, quantum dot fluorescent powder is arranged in the optical lens in a sealing mode, and the LED chip is a blue-light LED chip. By arranging the quantum dot fluorescent powder in the optical lens in the sealing mode, the quantum dot fluorescent powder can be effectively prevented from being oxidized, and meanwhile the problem that luminous efficiency is low because the quantum dot fluorescent powder makes contact with air is solved. The optical device can expand the color gamut range of the backlight greatly, is applied to the lighting field, and can realize lighting with a high color-rendering index and avoid the phenomena of luminescence unevenness and color rings.

Description

technical field [0001] The invention relates to the field of display backlight sources, in particular to an optical device capable of realizing a high color gamut backlight source. Background technique [0002] In the field of display backlight, there are two main types of LCD backlight: one is the side-in type using CCFL or LED with a light guide plate; the other is the direct type with LED and a secondary optical lens. [0003] The color gamut, as an index to measure the color performance of liquid crystal displays in the field of backlight, has attracted more and more attention. Since CCFL and LED are limited by the emission spectrum range, the color gamut range has certain limitations. At present, the color gamut range of CCFL or LED backlight is basically between 68% and 72%, which cannot meet higher color gamut requirements. [0004] The existing edge-lit CCFL backlight cannot meet higher color gamut requirements due to the limitation of its emission spectrum range. ...

AI Technical Summary

Problems solved by technology

[0007] Although the above-mentioned quantum dot phosphors for light-emitting devices can improve the color gamut to a certain extent, in the past direct-type or side-type backlights using quantum dot phosphors, quantum dot phosphors are coated on light guide plates or diffusion films. The surface of the material causes the quantum dots to oxidize directly in contact with the air, which will reduce the use effect of quantum dot phosphors

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