Luminescent device and backlight source

Abstract

The embodiment of the invention provides a luminescent device and a backlight source, relates to the technical field of display, and aims to solve the problems of small light emitting angle of a luminescent device and non-uniform brightness in application of the luminescent device to a backlight source display screen in the prior art. The luminescent device comprises a light emitting diode and an optical lens, wherein the optical lens comprises light incidence surfaces and light exit surfaces; the light incidence surfaces comprise a first light incidence surface and a second light incidence surface; the proportions of the smallest distance values of distances from all points on the first light incidence surface and the second light incidence surface to a central point of a luminescent surface to the biggest distance values belong to [0.5, 0.7] and [0.683, 0.695] respectively; the light exit surfaces comprise a first light exit surface and a second light exit surface; the proportions of the smallest values of distances from all points on the first light exit surface and the second light exit surface to the central point of the luminescent surface to the biggest distance values belong to [0.771, 0.913] and [0.883, 0.921] respectively.

Description

technical field [0001] The invention relates to the display field, in particular to a light emitting device and a backlight source. Background technique [0002] Liquid Crystal Displays (LCDs) have been widely used in electronic products with display functions such as mobile phones, computers, and televisions. As we all know, liquid crystal displays need a backlight source to achieve display. The light emitting diode (Light Emitting Diode, LED) has the characteristics of small size, low power consumption, long service life, wide color gamut, etc., and has become the mainstream light source of the backlight source of the liquid crystal display. However, due to the inherent disadvantages of light-emitting diodes such as small light-emitting angles and poor uniformity, the backlight source formed by using light-emitting diodes has problems such as uneven display brightness. [0003] In order to solve the inherent disadvantages of small light-emitting angle and poor uniformity...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a light-emitting device and a backlight, which solves the problems in the prior art that the light emitting angle of the light-emitting device is small, and when the light-emitting device is applied to a backlight, the brightness of the display screen is uneven such as bright spots and bright rings.

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