Wide-angle LED light source

An LED light source and wide-angle technology, which is applied in the field of wide-angle LED light sources, can solve the problems of LED loss, regional dynamic control, unfavorable energy-saving contrast, and reduced light efficiency, and achieve the effects of improving light utilization, energy-saving contrast, and improving refraction effects

Inactive Publication Date: 2009-10-21
上海广电光电子有限公司
View PDF0 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to increase the astigmatism angle of the reflective part, the reflective part should be as large as possible, but if the reflective part is too large, the reflected light angle will be too large or even change the propagation direction by more than 90 degrees. At this time, the reflected light must pas

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wide-angle LED light source
  • Wide-angle LED light source
  • Wide-angle LED light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and typical embodiments.

[0040] figure 2 It is a schematic diagram of the LED light source and its light path of the present invention.

[0041] See figure 2 , the LED light source of the present invention comprises a base 21, an LED light-emitting chip 22 and a lens, the LED light-emitting chip 22 is wrapped with an encapsulation material 23, the LED light-emitting chip 22 and the lens have the same central axis 19, and the lens includes The lower lens 24 and the upper lens 25; the upper surface 242 of the lower lens is a plane, and the lower surface is hollowed out along the central axis 19 to form a first cavity 20 with a concave spherical surface; the outer surface 251 of the upper lens is a curved surface, and The angle θ between the tangent line of each point of the curved surface and the incident light at this point is less than or equal to 90°, and the middl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a wide-angle LED light source, comprising a base, an LED light-emitting chip and a lens. The LED light-emitting chip and the lens have the same central axis. The lens comprises a lower lens and an upper lens. The upper surface of the lower lens is a plane, and the lower surface thereof is hollowly formed to be a first cavity with a concave spherical surface along the central axis. The external surface of the upper lens is a curved surface, the included angle between the target line of each point on the curved surface and the incident ray of the point is smaller than or equal to 90 degrees. The middle of the upper lens is hollowly formed to be a semi-ellipsoidal second cavity along the central axis. A first ray diffusing surface is formed at the joint of the lower lens and the second cavity. The inner surface of the upper lens is a second ray diffusing surface, and the external surface of the upper lens is a third ray diffusing surface. The lens of the wide-angle LED light source provided in the invention has three ray diffusing surfaces so as to greatly improve refraction effect and light utilisation rate.

Description

technical field [0001] The invention relates to a light emitting diode (LED) light source, in particular to a wide-angle LED light source. Background technique [0002] Light-emitting diode backlight has many advantages: all-solid structure, good mechanical strength; low working voltage, long life; strong color performance, green environmental protection; short switching time, has been widely used as the back of mobile phones, LCD monitors and LCD TVs light source. Especially in the field of large-size LCD TVs, LED backlights have given full play to their characteristics: solid-state light sources are not as fragile as cold-cathode lamps (CCFLs); strong color expression can significantly enhance image quality; most importantly, because they are Point light source, easy to control the dynamic area drive to achieve energy saving and improve contrast. Due to the above advantages of LED itself, the future development trend is that LED backlights will replace CCFL backlights an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F21S2/00F21V5/04H01L33/00F21Y101/02F21K9/66F21Y115/10
Inventor 邢亮
Owner 上海广电光电子有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap