Pre-stacked optical films

a technology of optical films and stacked films, applied in the field of optical displays, can solve the problems of increasing assembly time and the possibility of damaging the film, increasing the difficulty of handling an individual optical film, and difficult processing and other issues

Inactive Publication Date: 2008-04-17
3M INNOVATIVE PROPERTIES CO
View PDF99 Cites 55 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach reduces assembly time and material waste, increases efficiency, and allows for a larger viewing area without increasing the device's overall size, while minimizing the risk of film damage and debris accumulation.

Problems solved by technology

This process is difficult and costly in terms of time and material.
Removing cover sheets from individual films increases assembly time and the possibility of damaging the films.
In addition, as optical films become thinner and thinner, it becomes increasingly difficult to handle an individual optical film.

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
  • Pre-stacked optical films
  • Pre-stacked optical films
  • Pre-stacked optical films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016]FIG. 1a shows a schematic diagram of optical display 10a, which is not drawn to scale. Optical display 10a includes chassis 12; backlight unit 14 with reflector 16, light guide 18, and light source 20; diffuser 22; prismatic films 24 and 26; diffuser 28; reflective polarizer 30; adhesive layer 32; display panel 34; optical film unit 36 (formed by elements 22-32); and optical film package 38 (formed by optical film unit 36 and light guide 18).

[0017] Chassis 12 is typically a plastic frame for supporting components of optical display 10. In this embodiment, backlight unit 14 includes one or more layers of reflector 16, along with light guide 18, and light source 20. Light guide 18 may include special features for directing light and can take the form of a slab as shown or other forms such as a wedge.

[0018] Light source 20 may be any suitable type of light source such as a fluorescent lamp, light emitting diodes, or direct lit. Light from light source 20 is directed toward disp...

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

PropertyMeasurementUnit
widthaaaaaaaaaa
widthaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

Pre-aligned optical layers are stacked and arranged such that an adhesive layer, which is stacked onto the optical layers, contacts at least the uppermost layer and lowermost layer. The resulting subassemblies can be assembled into an optical display without individual handling of the layers, which reduces installation time and manufacturing costs.

Description

RELATED APPLICATIONS [0001] This application is a continuation of U.S. application Ser. No. 11 / 036,521 filed Jan. 14, 2005.BACKGROUND [0002] The present invention relates to optical displays. In particular, the present invention relates to pre-stacked optical films for assembly into an optical display. [0003] Optical displays, such as backlit liquid crystal displays (LCDs), are used in a wide variety of applications including mobile telephones, personal digital assistants (PDAs), electronic games, laptop computers, monitors, and television screens. Optical films are stacked within an optical display in order to enhance brightness and improve display performance without sacrificing battery life. [0004] Presently, films used in displays are provided as individual films to display manufacturers. The films include tabs that are useful in orienting and positioning the films, and cover sheets to protect the surfaces of the films. During assembly of a display, the cover sheets of the films...

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(United States)
IPC IPC(8): C09K19/00B32B3/00B32B3/02
CPCB29C65/5042B29L2011/00G02B6/005G02B6/0056G02B6/0088G02F1/133606Y10T428/10G02F2202/28B29C65/4815B29C66/53461Y10T428/24612Y10T428/23G02F2001/133507B29C66/24244B29C66/61B29C66/1122B29C66/1222B29C66/1224B29C66/12461C09K2323/00G02F1/133507G02F1/1335G02B5/30
InventorFREKING, ANTHONYMARUSHIN, PATRICKKOTCHICK, KEITHRUEGSEGGER, MICHAEL
Owner3M INNOVATIVE PROPERTIES CO