Apple wins patent for edge-lit backlight unit with thin profile
TweetFollow Us on Twitter

Apple wins patent for edge-lit backlight unit with thin profile



Apple has been granted a patent (number 8248554) by the U.S. Patent & Trademark Office for an edge-lit backlight unit with a thin profile.

In one embodiment, the backlight unit may include a light guide configured to receive light from a source and emit such light in a broad distribution to a turning film disposed over the light guide. The turning film may be configured to redirect light received from the light guide toward a normal of the turning film.

In one embodiment, the light guide may be configured such that peak light distribution therefrom occurs at an incident angle of approximately sixty degrees, with broad light distribution substantially occurring over an angular range between incident angles of thirty-five and eighty-five degrees. Additionally, in one embodiment, the turning film may include multiple prisms that receive and redirect the light emitted from the light guide, and that include apex angles of less than or about 60 degrees. Additional edge-lit backlight units and methods are also disclosed.

Here's Apple's background and summary of the invention: "Liquid crystal displays (LCDs) are commonly used as screens or displays for a wide variety of electronic devices, including such consumer electronics as televisions, computers, and handheld devices (e.g., cellular telephones, audio and video players, gaming systems, and so forth). Such LCD devices typically provide a flat display in a relatively thin package that is suitable for use in a variety of electronic goods. In addition, such LCD devices typically use less power than comparable display technologies, making them suitable for use in battery-powered devices or in other contexts where it is desirable to minimize power usage.

"LCDs typically include an LCD panel having, among other things, a liquid crystal layer and various circuitry for controlling orientation of liquid crystals within the layer to modulate an amount of light passing through the LCD panel. Further, while certain LCDs may operate by reflecting and modulating passage of light from a source positioned in front of the LCD panel (e.g., ambient light), many LCDs include a light source, such as an internal light source, that illuminates the LCD panel from behind.

"For example, in a direct-lit backlight configuration, a light source (e.g., a lamp or light emitting diodes) is provided behind, and directs light to, an LCD panel. To reduce the thickness of the LCD, an edge-lit backlight configuration may instead be used, in which the light source is oriented to illuminate an edge of a light guide, which in turn distributes such light to the LCD panel. While edge-lit backlights are generally thinner than direct-lit backlights, various conventional edge-lit backlights may exhibit certain disadvantages, such as reduced brightness and/or narrow acceptable viewing angles.

"Certain aspects of embodiments disclosed herein by way of example are summarized below. It should be understood that these aspects are presented merely to provide the reader with a brief summary of certain forms an invention disclosed and/or claimed herein might take, and that these aspects are not intended to limit the scope of any invention disclosed and/or claimed herein. Indeed, any invention disclosed and/or claimed herein may encompass a variety of aspects that may not be set forth below.

'The present disclosure generally relates to an edge-lit backlight unit for a display. In one embodiment, the edge-lit backlight unit includes a light guide that receives light from a light source, and emits this light in a broad distribution to a turning film. In one embodiment, the light guide includes anisotropic optical elements that refract light such that the light emitted to the turning film falls within a broad distribution, such as over a range of approximately fifty degrees.

"Additionally, the turning film may be configured to redirect this broad distribution of light toward a normal direction with respect to the backlight unit. In one embodiment, an edge-lit backlight unit may exhibit increased luminance, improved viewing angles, or both when compared to conventional edge-lit backlight units. Additionally, in one embodiment, the edge-lit backlight unit may be thinner than certain conventional edge-lit backlight units.

'Various refinements of the features noted above may exist in relation to various aspects of the present invention. Further features may also be incorporated in these various aspects as well. These refinements and additional features may exist individually or in any combination. For instance, various features discussed below in relation to one or more of the illustrated embodiments may be incorporated into any of the above-described aspects of the present invention alone or in any combination. Again, the brief summary presented above is intended only to familiarize the reader with certain aspects and contexts of embodiments of the present invention without limitation to the claimed subject matter."

The inventors are Jun Qi, Victor H. Yin, John Z. Zhong and Wei Chen.

 
AAPL
$132.05
Apple Inc.
+2.43
GOOG
$539.79
Google Inc.
+7.47
MSFT
$47.61
Microsoft Corporation
+1.02
MacNews Search:
Community Search:
view counter

view counter
view counter
view counter
view counter
view counter
view counter

Crossy Road Devs Hipster Whale are Bring...
Hipster Whale, the minds behind the rather popular (and rather great) Crossy Road, have teamed-up with Bandai Namco to create PAC-MAN 256: an absolutely bonkers looking maze runner chaser thing. | Read more »
Meet the New Spotify Music
Spotify Music  has a lot going on. They're introducing 3 new modes to serve all your musical needs, with the "Now" start page  gives you curated playlists based on your particular tastes. As you listen the app will learn more about your tastes and adapt to choose better music for you. [Read more] | Read more »
What the Apple Watch Gets Right, and Wha...
| Read more »
Celebrate PAC-MAN's 35th Birthday W...
BANDAI NAMCO Entertainment America is celebrating PAC-MAN's 35th anniversary by releasing updates for PAC-MAN and PAC-MAN Lite for iOS. [Read more] | Read more »
Strike Wing Episode 2 has Landed on the...
Strike Wing: Raptor Rising is an exciting space combat simulator by Crescent Moon Games, which was recently updated to continue the story with Episode 2. [Read more] | Read more »
Kiqplan Expands its Interactive Coaching...
The makers of Fitbug have been hard at work on their Kiqplan lineup, and have added four new summer themed plans to help you get the most out of your workout. [Read more] | Read more »
Make a Photobook in Minutes with Pictyea...
What happens when you can't stop taking photos and have an urge to create a photobook? Pictyear saves the day. [Read more] | Read more »
This Week at 148Apps: May 18-22, 2015
May Days at 148Apps How do you know what apps are worth your time and money? Just look to the review team at 148Apps. We sort through the chaos and find the apps you're looking for. The ones we love become Editor’s Choice, standing out above the many good apps and games with something just a little bit more to offer. Take a look at what we've been... | Read more »
Biz Builder Delux (Games)
Biz Builder Delux 1.0.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.0 (iTunes) Description: Ah, there's nothing like the rhythmic bustle of a burgeoning business burg... especially when you're the one building it! That's right, from a video game store to the corner fast food joint, run what YOU want as the town... | Read more »
Auroch Digital is Bringing Back Games Wo...
| Read more »
All contents are Copyright 1984-2010 by Xplain Corporation. All rights reserved. Theme designed by Icreon.