A kind of LED lighting device and its secondary lens structure

Abstract

The invention discloses a secondary lens structure for an LED light-emitting device. The secondary lens structure comprises a base body. The base body is provided with an incident plane and an exit plane. The incident plane is a curved surface formed in the manner that a first bus rotates around a rotating shaft, the first bus is a curve, an end point of one side of the first bus is a fixing pointarranged on the rotating shaft, the incident plane is in a shaft symmetry structure with the rotating shaft as the axis, and a semi-transparent and semi-reflecting film is evaporated on the incidentplane, so that the proportion of reflection light of the incident plane is larger than that of projection light. The exit plane is an aspheric surface. The invention further discloses an LED light-emitting device with the secondary lens structure. By the implementation of the LED light-emitting device and the secondary lens structure thereof, forming of the manufacturing process technology is easy, and the difference between a product obtained by the manufacturing process and a design model is reduced. The number of LEDs is smaller under the same light mixing height state, the lens height is reduced, and the secondary lens structure is more suitable for lens products with the low light mixing height.

Description

technical field [0001] The invention relates to the field of optics, in particular to an LED lighting device and a secondary lens structure thereof. Background technique [0002] As a communication interface between people and information, liquid crystal display is the current mainstream display method. It has superior characteristics such as high space utilization, low power consumption, no radiation, and low electromagnetic interference, and is widely used in information communication tools such as TVs, mobile phones, and tablet computers. [0003] With the further expansion of the application field of the liquid crystal display, in order to further improve the display effect of the display, the industry proposes the concept of HDR. The concept is to achieve greater display details and improve the display effect. In order to achieve a higher contrast ratio, local dimming is required for the backlight; the industry has also proposed their own HDR concept specifications fo...

AI Technical Summary

Problems solved by technology

The central area is the main structure of the lens light control, so the lens structure with superior optical performance obtained in optical design is not likely to fail to achieve the expected effect after actual injection molding

Images