Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Light guide film with multi-faceted light input edge

A light guide film and edge technology, applied in the field of light guide film, can solve the problem of reducing the efficiency of edge jagged features

Inactive Publication Date: 2013-05-08
SKC HAAS DISPLAY FILMS CO LTD
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a wider flat surface reduces the efficiency of the edge sawtooth feature because the flat surface does not spread the incident light to a large enough angle, such as the attached Figure 3A shown

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
  • Light guide film with multi-faceted light input edge
  • Light guide film with multi-faceted light input edge
  • Light guide film with multi-faceted light input edge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] Referring now to the accompanying drawings, the attached Figure 5A A light directing film 33 of the present invention is shown having a light input edge with a plurality of multi-faceted features 32 . attached Figure 5B An enlarged top view of the invention is shown. The light emitted by the point light source 31 is incident on the multi-faceted feature 32 . Each light source 31 covers at least one faceted feature.

[0048] Each multi-faceted feature includes a feature top and a feature recess. The feature top includes a flat surface. In addition, each multi-faced feature further includes at least two sets of ramps between the feature top and adjacent feature recesses. Each set of ramps includes two ramps on opposite sides of the top of the feature. Each flat or sloped surface has a planar surface area. The slope angle of each ramp tapers from the feature recess to the feature top. The set of ramps near the recess of the feature has a greater angle of inclinat...

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 invention provides a light guide film which is used for uniformly distributing lights from a point light source. The light guide film comprises a multi-faced edge which is used for receiving light of the point light source and which comprises at least a first group of slopes and a second group of slopes which have plane surfaces. The two groups of slopes respectively further comprise a first slope factor and a second slope factor, wherein the first slope factor does not exceed 85 DEG and the second slope factor is at least 5 DEG, and the first slope factor is at least 5 DEG larger than the second slope factor.

Description

technical field [0001] The present invention relates to a light directing film for a light emitting diode (LED) backlight unit, and more particularly, to a light directing film for an LED backlight unit having a plurality of faceted features cut into the entrance face of the light directing film by increasing light Transmits the angle of incidence through the light directing film, thereby evenly distributing light from point sources. Background technique [0002] A typical planar backlight in a TFT-LCD, as shown in FIG. 1 , mainly includes a light guide plate 11 , a reflection plate 12 , a plurality of diffusion films 13 and prism sheets 14 , and a light source 15 . As one of the most important components of the planar light source 1 , the light guide plate 11 receives, spreads and redirects the light emitted by the light source 15 . [0003] As shown in FIG. 2 , the light guide plate 11 is generally rectangular and has a light emitting surface 111 , a reflective surface 11...

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 & Authority Applications(China)
IPC IPC(8): F21V8/00F21Y101/02
CPCG02B6/0036G02B6/0038G02B6/004G02B6/0073G02F1/133524
Inventor X·朱J·P·汉尼根李柱贤
Owner SKC HAAS DISPLAY FILMS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com