Strip-shaped lens for LED daylight lamp and large-angle LED daylight lamp

Abstract

The invention provides a strip-shaped lens for an LED daylight lamp and the large-angle LED daylight lamp. The strip-shaped lens comprises a strip-shaped body. The upper surface of the longitudinal section of the strip-shaped body protrudes outwards to form an emergent surface. The middle of the emergent surface is provided with a concave surface. The position, corresponding to the concave surface, of the lower surface of the longitudinal section of the strip-shaped body is sunken inwards to form an incident cavity, and the inner wall of the incident cavity serves as an incident surface. As the strip-shaped lens is arranged on an LED bulb of the LED daylight lamp, light emitted from a light source which is placed in the incident cavity of the lens passes through the incident surface and is emitted via the protruding emergence surface, a large light distribution angle larger than 120 degrees in the vertical direction can be easily achieved, and the light distribution angle can reach 150 degrees by the adoption of the scheme. Furthermore, the concave surface of the middle of the emergence surface can allow light which is originally concentrated in the middle of the light source to be refracted all around, and then the light-emitting angle and peripheral light intensity of the lens after light distribution of the light source are increased.

Description

technical field [0001] The invention relates to the field of lighting equipment, in particular to a strip lens for an LED fluorescent lamp and a large-angle LED fluorescent lamp. Background technique [0002] Compared with traditional fluorescent lamps, LED fluorescent lamps have many advantages, such as high luminous efficiency, high lamp efficiency, high power supply efficiency, long life, environmental protection and pollution-free, vibration resistance, impact resistance, etc. Therefore, it is imperative for LED fluorescent lamps to replace traditional fluorescent lamps. Among the existing fluorescent lamps, there are also some products with LED as the light source. [0003] For example, the Chinese patent CN201487650U disclosed on May 26, 2010 is a typical structure of a LED fluorescent lamp, including a lamp tube installed on a lamp holder, a PCB board in the lamp tube and an LED lamp on it. The semicircular transparent PC cover and the opaque mounting plate with a s...

AI Technical Summary

Problems solved by technology

As the current market pursues the thickness of the light box more and more light and thin, this means that the distance of the light emitted by the backlight source in the light box is compressed, resulting in that even the LED fluorescent lamp that can reach a 120-degree light-emitting angle as the above-mentioned patent will also emit light. Insufficient distance and according to the original setting density will cause the problem of uneven illumination

There are several ways to solve the above problems in the prior art, the simplest solution is to increase the installation density of LED fluorescent lamps in existing applications, but this will undoubtedly increase the cost

In addition, the edge-emitting structure of a small liquid crystal display can also be used, but the cost of this structure is relatively high, and its uniformity of illumination can only be used in small-area light boxes.

Another solution is to use the backlighting technology of a large LCD screen and fill the light box with LEDs, but this cost is undoubtedly very high and completely unnecessary for paper advertisements

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