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Optical lens assembly having fluorescent layer

a technology of optical lenses and fluorescent layers, applied in the field of optical lens assemblies, can solve the problems of deterioration of light emission properties, direct contact of fluorescent layers above led chips with moisture in the air, and gradual decay of white light levels, so as to achieve the effect of maintaining the optical performance of fluorescent layers over a long period

Inactive Publication Date: 2012-08-30
GEM WELTRONICS TWN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution effectively maintains the optical performance of the fluorescent layer over a long period, reduces manufacturing costs, and enables pre-optical testing of LED packages with enhanced heat dissipation and packaging efficiency.

Problems solved by technology

However, one disadvantage of the prior art is that the fluorescent layer formed above the LED chips is directly in contact with moisture in the air.
It is known that a fluorescent material can absorb moisture from the air, and would result in the deterioration in light emission properties, and the level of white light would gradually decay.
Moreover, if a fluorescent material is formed on an LED chip by filling or coating method, an extra amount of the fluorescent material have to be provided for ensuring that the fluorescent material will form substantially uniformly on the LED chip, which will increase the manufacturing cost.
Furthermore, if the fluorescent layer has flaws, the LED chip can not be reused.

Method used

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  • Optical lens assembly having fluorescent layer
  • Optical lens assembly having fluorescent layer
  • Optical lens assembly having fluorescent layer

Examples

Experimental program
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Effect test

first embodiment

[0026]FIG. 5 is a schematic view showing the partition frame according to the present invention. FIG. 5a is a schematic view showing the partition frame of FIG. 5 assembled with the fluorescent layer 7, the top optical lens 3, and the bottom optical lens 5. At least two slots 115 can be located diametrically opposite to each other in the partition frame 1. The at least two slots 115 are formed through the partition ring 11 to communicate the interior and exterior of the partition frame 1, and the fluorescent material can be filled in the slot space through one of the at least two slots 115 so as to form a fluorescent layer 7 in the slot space.

[0027]A filling material is used to seal the at least two slots, 115 (not shown), and the filling material includes a nail member, and an adhesive. The adhesive includes at least one of UV-curable adhesive, silicone, epoxy resin and polyimide, and the material of the nail member includes at least one of plastic and metal. The slot space is evac...

second embodiment

[0028]Referring to FIG. 6, which is a schematic view showing the partition frame according to the present invention. FIG. 6a is a schematic view showing the partition frame of FIG. 6 assembled with the fluorescent layer 7, the top optical lens 3, and the bottom optical lens 5. The two slots 115 are formed on the surfaces of the L-shaped structure or the reverse L-shaped structure, and one opening end of each of two slots 115 is arranged on the inner surface of the partition ring 11, and the other opening end of each of the two slots is arranged on the top surface of the partition frame 1. The adhesive 8 is used to seal the at least two slots 115. The adhesive 8 includes at least one of UV-curable adhesive, silicone, epoxy resin, and polyimide. The slot space is evacuated through the at least two slots 115, and then a fluorescent material is filled in the slot space so as to form a fluorescent layer.

[0029]Referring to FIG. 7, which is a schematic view showing an array-type LED accord...

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PUM

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Abstract

An optical lens assembly having a fluorescent layer is disclosed, which includes a partition frame with a partition ring protruding inwardly from an inner wall surface of the partition frame, two optical lenses, and a fluorescent layer, wherein a slot space is defined by the two optical lenses and the partition ring of the partition frame, and the fluorescent layer is accommodated within the slot space. The top optical lens can be a flat slab lens, or a convex lens. When the optical lens assembly having a fluorescent layer is used in the optical device, the moisture can be prevented from entering the fluorescent layer, and thus the optical performance of the fluorescent layer can be maintained over a long period.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates an optical lens assembly, and especially to an optical lens assembly having a fluorescent layer for preventing the moisture from entering the fluorescent layer formed therein, and thereby the optical performance of the fluorescent layer can be maintained over a long period, and thus the optical lens assembly of the present invention can be applied to the array-type LED packaging.[0003]2. The Prior Arts[0004]An LED is a semiconductor light source, which operates based on the recombination of carriers (electrons and holes) in a semiconductor. When an electron carrier in the conduction band combines with a hole in the valence band, it loses energy equal to the bandgap in the form of an emitted photon; i.e., light. The LEDs have the advantages of compact size, fast start-up time, and high efficiency so that they can be applied to various applications especially in the field of solid-state light...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G02B13/14
CPCG02B7/021G02B7/026G02B27/1006G02B27/123
Inventor HWU, JON-FWUWU, YUNG-FULIU, KUI-CHIANG
Owner GEM WELTRONICS TWN CORP