LED backlight

A LED array and backlight technology, applied in the field of LED backlight, can solve the problems of limited durability and increased manufacturing cost

Active Publication Date: 2021-01-12
PLESSEY CO LTD
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the large number of individual parts of known devices increases manufacturing costs and may limit durability

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
  • LED backlight
  • LED backlight
  • LED backlight

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0076] figure 1 An exploded view of a backlight (100) comprising a monolithic LED array (110) with a plurality of micro LEDs (115); a monolithic collimator array (120) with a plurality of collimator channels (125); a monolithic collimator array (120) with a plurality of a microlens array (130) of lenslets (135); and a relay lens (140).

[0077] In use, light emitted from the plurality of micro LEDs (115) is collimated through the collimator channels (125) of the monolithic collimator array (120). Light from each channel (125) enters the lenslets (135) of the microlens array (130). This focuses the light to infinity. The light then passes to a relay lens (140). The relay lens then directs the light toward the display ( figure 1 not shown) focus.

[0078] Figure 2AA prior art projection optics system comprising a green LED (216) and a combined red / blue LED (217), a collimator (220, 221 ) associated with each of these LEDs (216, 217), Dichroic mirror (245), fly-eye lens a...

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 present invention provides an LED backlight for use with a display panel, the backlight comprising a monolithic LED array having a surface and comprising a plurality of LEDs for emitting light from the surface of the array; a monolithic collimator array comprising a plurality of collimating channels, and being aligned so that each of the collimating channels is aligned with one or more of theplurality of LEDs, wherein the collimating channels are configured to collimate emitted light emitted from the LEDs to angles in the range of about + / -50 degrees from a line substantially normal to the surface of the LED array; a microlens array for focusing the collimated light to infinity, the microlens array comprising a plurality of lenslets, each lenslet aligned with a collimating channel ofthe monolithic collimator array; and a relay lens for focusing the light from the microlens array on a display panel.

Description

technical field [0001] The present disclosure relates to an optical lighting device, and in particular, to an LED backlight for use with a display panel having fewer optical components, reduced size and reduced weight, and the use of the backlight in a digital display device. Furthermore, the device of the invention allows splitting or tiling of the illuminated area, allowing energy savings when only a fraction of the entire display area is required. Background technique [0002] In many applications such as digital projectors, optical lighting devices must convert a structured light source, such as from an LED or LEDs, and convert it into a homogeneous or uniform light source in order to illuminate the display panel. The display panel may be an LCoS (Liquid Crystal on Silicon), a MEMS device such as a DMD (Digital Mirror Device), or an LC (Liquid Crystal) panel. Conventional systems use fly-eye lenses or homogenizing rods in order to homogenize the light. In many applicat...

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
Patent Type & AuthorityApplications(China)
IPC IPC(8): H04N9/31H04N5/74
CPCH04N9/315G02F1/133603G02F1/136277G02F1/133605G02F1/133621H01L27/156G03B21/10G02F1/133601G02F1/133607G02B6/0023G02B6/003G02B6/0066G02F1/1335G02F1/13362G03B21/006G03B21/2033G03B21/2073
Inventor萨米尔·迈祖阿里艾哈迈德·玛卡维基思·斯特里克兰
OwnerPLESSEY CO LTD