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Molded LED light sheet

A light plate and mold technology, which is applied to light sources, parts of lighting devices, semiconductor devices of light-emitting elements, etc., can solve the problems of limited use of flexible light plates

Inactive Publication Date: 2016-01-13
NTHDEGREE TECH WORLDWIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The disclosed uses of the above-cited flexible light sheets are still limited due to the inability to make good 3-dimensional shapes using the disclosed techniques

Method used

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  • Molded LED light sheet
  • Molded LED light sheet
  • Molded LED light sheet

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0037] In one embodiment of the invention, a thin light plate containing microscopic LED dies is molded to have any type of 3D features, such as an array of bumps for increased light extraction and / or for creating a desired light emission profile . In another embodiment, the light panel is molded to correspond to alphanumeric characters or any other design. In another embodiment, the light board forms the backlight of the thin touch sensor, and the backlit touch sensor is molded to convey alphanumeric characters or any other design. By using microscopic LEDs, the LEDs will not detach from their conductor layers when the light plate is bent by molding. Other embodiments are disclosed.

[0038] exist figure 1 Among them, the starting substrate 10 may be a polycarbonate, PET (polyester), PMMA, Mylar or other type of polymer plate or even a thin metal film. In one embodiment, substrate 10 is about 25 to 50 microns thick.

[0039] A conductor layer 12 is then deposited over t...

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PUM

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Abstract

An initially flat light sheet is formed by printing conductor layers and microscopic LEDs over a flexible substrate to connect the LEDs in parallel. The light sheet is then subjected to a molding process which forms 3-dimensional features in the light sheet, such as bumps of any shape. The features may be designed to create a desired light emission profile, increase light extraction, and / or create graphical images. In one embodiment, an integrated light sheet and touch sensor is formed, where the molded features convey touch positions of the sensor. In one embodiment, a curable resin is applied to the light sheet to fix the molded features. In another embodiment, optical features are molded over the flat light sheet. In another embodiment, each molded portion of the light sheet forms a separate part that is then singulated from the light sheet.

Description

[0001] Cross References to Related Applications [0002] This application is based on U.S. Application No. 14 / 292,069 filed May 30, 2014 by Eric William Kahrs et al., which is based on Eric William Kahrs et al. filed June 2013. US Provisional Application No. 61 / 830,861, filed April 4, assigned to the present assignee and incorporated herein by reference. technical field [0003] The present invention relates to forming light emitting diode (LED) lights, and in particular, to forming thin, flat panels of LED lights and then molding the panels to have 3-dimensional features. Background technique [0004] LED lights greatly reduce operating costs compared to incandescent lights, are more pleasing to the eye than fluorescent lights and have a very long life. [0005] The present assignee has previously invented flat light panels by printing microscopic vertical LED dies over a conductive layer on a flexible substrate to electrically contact the bottom electrodes of the LEDs, f...

Claims

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Application Information

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IPC IPC(8): H01L25/075
CPCH01L25/0753H01L2224/32245H01L2924/0002F21K9/65F21V33/0052H01L33/58H01L2924/00
Inventor 埃里克·威廉·卡尔斯布拉德利·史蒂文·奥拉韦
Owner NTHDEGREE TECH WORLDWIDE