A kind of lens, backlight assembly and display device
A lens and light source technology, applied in the field of display equipment, can solve problems such as easy to produce bright edges and dark frames, and poor uniformity, and achieve the effects of ensuring uniformity, reducing light intensity, and increasing light intensity
Active Publication Date: 2019-10-11
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to provide a lens, a backlight assembly and a display device, which can solve the technical problems of poor uniformity and easy generation of bright edges and dark frames in the direct display device in the prior art
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[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0029] This embodiment provides a lens, such as image 3 As shown, the inner surface of the lens 1 is recessed to form an accommodating cavity 11, and the accommodating cavity 11 is used to accommodate the light source 2; Figure 4 As shown, an inner cavity 12 is arranged between the inner surface and the outer surface of the lens 1, and the inner cavity 12 is filled with fluorescent powder; as Figure 5 As shown, the change of the width D of the inner cavity 12 along the light radiation direction of the light source is opposite to the change of the light intensity of the light distribution curve of the light source 2, so that the light intensity emitted from the lens 1 remains consistent...
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The invention relates to a lens, a backlight module and display equipment, and belongs to the technical field of backlight sources. The lens is provided with an inner cavity; fluorescent powder is used for filling the inner cavity, is suffered from exciting light of a light source to emit light, and is equivalent to a scattering light source; and the fluorescent powder is used for filling the lens to greatly increase the light emitting angle of the lens so as to prevent bad visual effect of nonuniform lightness. In addition, the width change of the inner cavity in the light radiation direction of the light source is opposite to the light intensity change of a light distribution curve of the light source, so that more fluorescent powder is in an area with lower light intensity of light emitted by the light source, and the light intensity of the excited light is improved; and less fluorescent powder is in an area with higher light intensity of the light emitted by the light source, so that the light intensity of the excited light is reduced, the energy of the light emitted by the lens from each angle is kept consistent, and the uniformity of the light emitted by the lens is guaranteed.
Description
technical field [0001] The invention relates to the field of display equipment, in particular to a lens, a backlight assembly and a display equipment. Background technique [0002] The traditional direct-type LED light bar is composed of three parts: PCB, LED and optical lens, such as figure 1 As shown, the light-emitting angle of LEDs currently used in the display industry is about 120° in the plane and the distribution of light energy at each angle is uneven. Matching lenses must be used to obtain uniform visual effects for direct-lit display devices. When using lenses Due to the limitation of design technology, long revision cycle and high processing precision requirements, LEDs can not achieve uniform visual effects with traditional lenses, and often need to use additional high-cost reflectors, diffusers and diaphragms to cover bad visual effects, and Traditional lenses need to ensure a height of 5-7mm to ensure good optical effects, which will take up more light mixing...
Claims
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IPC IPC(8): F21V5/04F21V7/00F21V7/04F21V9/40F21S8/00F21Y115/10
Inventor 刘欣王博沈思宽王玉年邹文聪徐军熊圣锴
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD