LED long-afterglow composite light-emitting lens and light-emitting device comprising LED long-afterglow composite light-emitting lens structure

Abstract

An LED long-afterglow composite light-emitting lens comprises a lens body structure (1) and a long-afterglow light-emitting forming body (2), the lens body structure (1) at least comprises a light distribution optical main body part (11), and the lens body structure (1) is provided with a containing groove (1B) or a wedging structure (1D); the center of the bottom of the lens body structure (1) is recessed inwards to form a center containing cavity (1A), the long-afterglow light-emitting forming body (2) is combined on the lens body structure (1) through the containing groove (1B) or the wedging structure (1D), and a transparent light guide medium (3) is arranged on the combination face of the long-afterglow light-emitting forming body (2) and the lens body structure (1) to form a light guide coupling face (1e); the universal light-emitting lens structure can be suitable for LED long-afterglow light-emitting forming bodies of various types and specifications and can be combined with LEDs to be manufactured into various light-emitting devices; the light energy distribution proportion can be adjusted, light distribution is conducted on an emergent light field, the light coupling effect with the long-afterglow light-emitting forming body (2) is achieved, and at least part of emergent light of an LED light-emitting body can be emitted according to the light path design while the advantages of afterglow light emitting are reserved.

Description

technical field [0001] The invention relates to the field of light-emitting optical devices and light-emitting equipment, in particular to an LED long-persistence composite light-emitting lens and a light-emitting device comprising the LED long-persistence composite light-emitting lens structure. Background technique [0002] Long afterglow luminescent material is referred to as long afterglow material, also known as luminous material. It is a kind of photoluminescent material: under the excitation of the light source, it emits visible light, and stores part of the obtained light energy. The energy is slowly released, and its luminous brightness is related to the performance of the luminescent material itself, as well as the thickness of the long afterglow luminescent layer and the concentration of the long afterglow luminescent powder. Brightness has been greatly improved. In recent years, it has gradually been paid attention to, and has been applied to various lighting equ...

AI Technical Summary

Problems solved by technology

[0007] As mentioned above, the long afterglow photoelectric products in the prior art, the long afterglow material combined with the LED basically adopts a planar covering arrangement, and is mainly formed by liquid pouring and leveling, mainly in a layered form, and the long afterglow material is provided below or inside. LED, LED, only SMD type (SMD) LED has a better luminous effect, and the luminous effect of LEDs in other packaging methods is not ideal, and some products also have a light-transmitting protective panel above the long-lasting light-emitting layer; especially long-lasting materials The luminous effect of the setting method in contact with the LED is the main one. When the LED emits light, part of the light energy excites the long afterglow, and part of the unconverted light energy diffuses and emits light after passing through the long afterglow light-emitting layer. Therefore, the prior art products must have the following defects:

[0008] 1. The long afterglow light-emitting layer is mainly excited by transmission. At present, LEDs mainly include SMD type (chip type), COB type (integrated type), LAMP type (in-line type) or imitation lumen lamp beads. The packaging method and product shape , size specifications, luminous performance, welding methods are different, and the focus of use is also different. Some LEDs have their own primary packaging, especially the height (thickness) between the top of the LED luminous body and the circuit board layer. 1. Therefore, the thickness of the long afterglow luminescent layer on the top of the LED and on the sides of the LED is uneven. Generally, the thickness of the long afterglow luminescent layer on the top of the LED is smaller than the thickness of the long afterglow luminescent layer on the side of the LED, which is easy to cause the long afterglow luminescent layer above the LED. The thickness is too thin, resulting in insufficient afterglow brightness, or the thickness of the long afterglow luminescent layer around the LED side is too thick, resulting in insufficient excitation of the long afterglow luminescent layer, resulting in waste of light energy; and the long afterglow material of the existing LED long afterglow luminous body It is difficult to make various three-dimensional shapes, and the three-dimensional luminous effect is not good, so that the luminous viewing angle, especially the luminous viewing angle of the side light, is limited; in short, the utilization rate of LED light energy is low, and the luminous effect and LED light distribution and output effect are poor.

[0009] 2. Since the long afterglow luminescent layer is set above the LED luminous body, the LED light will be absorbed and scattered by the long afterglow powder when it exits the long afterglow layer, which will lead to excessive loss of light intensity and poor directivity of the LED exit light (the exit light loses directionality ), it is difficult to achieve output according to the design of the optical path [it is convenient to realize parameters such as luminous angle, beam angle or light intensity distribution, such as concentrating or diverging or polarized (the outgoing main beam exits at an acute angle with the luminous axis) or, polarized light (sometimes called side Light, the outgoing light energy distribution on one side is greater than the outgoing light energy distribution on the other side), etc.], especially for fixed-point (area) projection that requires lighting purposes or directional (angle) projection requirements that require indication purposes The luminous equipment cannot meet the requirements at all, and the existing products have a short luminous range and a short viewing distance, which is especially unfavorable for traffic, security, emergency and other purposes.

[0010] 3. The long afterglow luminescent layer covers the top of the LED luminous body, and the light emitted by the LED luminous body through the long afterglow luminescent material is a mixed-color luminescence with the excited light of the long afterglow, resulting in impure luminous color and shifted chromaticity, resulting in long afterglow Excessive influence and interference on the luminous spectrum of LED light-emitting devices such as chromaticity or color temperature when excited by light affects the luminous spectrum of the original LED: when white LEDs corresponding to lighting purposes are used as excitation light sources, the quality of the white light spectrum is seriously affected , when the excitation light source of other colors is used, it will affect the luminous chromaticity, resulting in limited application range

[0011] In short, the long-afterglow light-emitting products of the prior art have the above-mentioned fatal defects and other shortcomings, which restrict their development and become an urgent problem to be solved in the industry.

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