Luminescent device and backlight source

Abstract

The invention provides a luminescent device and a backlight source in one embodiment, relates to the technical field of display and aims at solving the problem of a small light emergent angel of a luminescent device in the prior art and the problem of non-uniform brightness like light spots and light rings on a display screen if the luminescent device is applied to a backlight source. The luminescent device comprises an LED and an optical lens, wherein the optical lens comprises a light incident surface and a light emergent surface; the light incident surface comprises a concave free-form surface, while the light emergent surface comprises a convex free-form surface; the connection line of the center point of a light-emitting surface and any point of the light incident surface forms a first included angle with an axis of symmetry, and the curvature of the light incident surface is reduced as the first included angle is increased; the connection line of the center point of the light-emitting surface and any point of the light emergent surface forms a second included angle with the axis of symmetry, and the curvature of the light emergent surface is increased as the second included angle is increased; the first included angle and the second included angle are not greater than 90 degrees. The luminescent device is applied to the manufacture of the luminescent device and the backlight source comprising the luminescent device.

Description

technical field [0001] The invention relates to the field of display technology, 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 p...

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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