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LED package, led display and method for manufacturing led package

A technology of LED display and LED packaging, which is applied in the direction of instruments, identification devices, semiconductor devices, etc., and can solve problems such as difficult to read text

Active Publication Date: 2020-06-26
CREE HUIZHOU SOLID STATE LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, consumers may find it difficult to read displayed text in the sun if the display reflects most of the sunlight

Method used

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  • LED package, led display and method for manufacturing led package
  • LED package, led display and method for manufacturing led package
  • LED package, led display and method for manufacturing led package

Examples

Experimental program
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Embodiment Construction

[0040] The present invention is directed to LED packages and LED displays employing them, wherein the LED packages contain different arrangements to increase the emission contrast between adjacent LED packages in the display and to reduce reflections caused by light outside the packages. These packages may include one or more LED chips mounted on a submount or in a package housing and conversion material. A portion of the exterior surface of the submount or housing may comprise a color that contrasts with the color of light emitted from the LED package. Part of the exterior surface of the submount may also include a matte surface to reduce reflections.

[0041] In some embodiments, the area of ​​the submount or housing immediately surrounding the LED chip may comprise a material that is substantially the same color as or reflects light from the LED chip. Such a reflective area may at least partially comprise a reflective cup. Areas of the submount outside such reflective are...

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Abstract

The invention discloses an LED package and an LED displayer using the LED package. The LED package is used for providing good contrast ratios between different pixels in the LED displayer without reducing perception luminous flux or brightness of the displayer at the same time. The LED package is further used for improving visibility by reducing reflection of light from the outer portion of the package. One embodiment of the LED package comprises an outer shell, and an LED chip is arranged in a cavity of the outer shell. The LED package further can comprise a reflection area around the LED chip, the reflection area basically reflects light of the package, a comparison area is arranged outside the reflection area, and the comparison area has colors contrastive with the light of the package. At least a part of the surface, facing viewers, of the package is used for eliminating light to reduce reflection. The LED displayer comprises a plurality of LED packages which are arranged oppositely to generate message or images. The package provides improved pixel ratios.

Description

technical field [0001] The present invention relates to light emitting diode (LED) packages and displays utilizing the light emitting diode packages as their light sources. Background technique [0002] Light-emitting diodes (LEDs) are solid-state devices that convert electrical energy into light, typically comprising one or more active layers of semiconductor material sandwiched between oppositely doped layers. When a bias voltage is applied across the aforementioned doped layers, holes and electrons are injected into the active layer where they recombine to generate light. Light is emitted from the active layer as well as all surfaces of the LED. [0003] In the last decade or more, technological advances have resulted in LEDs with smaller footprints, increased emission efficiencies, and reduced costs. LEDs also have an extended operating life compared to other emitters. For example, the operating life of LEDs can exceed 50,000 hours, while the operating life of incande...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L25/075H01L33/50H01L33/58G09F9/33
CPCH01L2224/32245H01L2224/48091H01L2224/48247H01L2224/73265H01L2924/00014H01L2924/00
Inventor 陈志强费翔钟振宇
Owner CREE HUIZHOU SOLID STATE LIGHTING