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LED device having tilted peak emission and LED display including such devices

A technology for LED packages and displays, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of expensive installation hardware, waste, pollution, etc.

Active Publication Date: 2013-05-01
CREE HUIZHOU SOLID STATE LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, the wasted light can lead to light pollution by creating unwanted light reflections and / or glare
One way to reduce the amount of wasted light is by mounting the display at an angle to better match the viewer's line of sight, but this requires complex and expensive mounting hardware which is difficult to apply, especially for installations at high heights very large display

Method used

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  • LED device having tilted peak emission and LED display including such devices
  • LED device having tilted peak emission and LED display including such devices
  • LED device having tilted peak emission and LED display including such devices

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Embodiment Construction

[0031] The following description presents preferred embodiments of the disclosure, showing the best mode contemplated for carrying out the disclosure. This description is not for purposes of limitation, but merely for the purpose of describing the general principles of the disclosure, the scope of which is defined by the appended claims.

[0032] Embodiments of the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout.

[0033] It will be understood that, although the terms first, second, etc. may be used herein to des...

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Abstract

An LED package and a lead frame include a reflector cup having a bottom surface with an LED asymmetrically positioned on the bottom surface and a wall surface inclined relative to the bottom surface and defining an opening at an upper end thereof. The bottom surface of the reflector cup has a first axial dimension along a first axis and second axial dimension along a second axis, orthogonal to the first axis. A display having an asymmetrical FFP and asymmetrical screen curve includes an array of the LED modules including a plurality of LED packages. At least some of the LED packages include a dome-shaped lens asymmetrically positioned with respect to a geometric center of the bottom surface of the reflector cup.

Description

technical field [0001] The present disclosure relates generally to light emitting diodes (LEDs), and more particularly, to LED devices having sloped peak emission, and to LED displays including such devices. Background technique [0002] In recent years, LED technology has advanced significantly, so that LEDs with enhanced brightness and color fidelity have been adopted. Thanks to these improved LEDs and improved image processing techniques, large-size, full-color LED video screens have become available and are now commonly used. Large format LED displays typically comprise a combination of individual LED panels, providing an image resolution determined by the distance between adjacent pixels, or "pixel pitch." [0003] Outdoor displays, which are intended to be viewed from greater distances, have relatively large pixel pitches and typically include discrete arrays of LEDs. In discrete LED arrays, groups of individually mounted red, green, and blue LEDs are driven to form ...

Claims

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Application Information

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IPC IPC(8): H01L33/00
CPCH01L33/483H01L33/60
Inventor C·K·陈张志宽Y·K·刘X·费H·刘J·Z·圣D·T·埃默森
Owner CREE HUIZHOU SOLID STATE LIGHTING