Electronic display device

• US 20050253505A1
• Filed: 02/25/2003
• Published: 11/17/2005
• Est. Priority Date: 03/06/2002
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Bron, Marco Jan Reinder, Braak, Rogier Johannes, Mclachlan, Scott Dale
• Application Number:
  US10/506,285
• Publication Number:
  US 20050253505A1
• Time in Patent Office: Days
• US Class Current: 313/506
• CPC Class Codes: G02B 5/22 Absorbing filters G02B5/201 - G02B5/208 take precedence
• CPC Class Codes: G02B 5/26 Reflecting filters G02B5/28 takes precedence
• CPC Class Codes: G02B 5/3033 in the form of a thin sheet or foil, e.g. Polaroid
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/875 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers

Abstract

An electronic display (2) device comprising: a polymer LED display (8); a filter layer (11); a semi-transparent reflective layer (12) covering said filter layer (11) for transmitting light (14) emanating from said polymer LED display and for reflecting ambient light (13) incident on said semi-transparent reflective layer so as to obscure electrical connections for exciting said polymer-LEDs. Due to the reflective properties of the semi-transparent reflective layer (12), graphics of the polymer LED are hidden while the brightness of the display is maintained to a sufficient degree.

Claims

1. An electronic display device comprising:

a polymer LED display comprising a geometrical arrangement of individually excitable polymer LEDs for forming an image and comprising electrical connections for exciting said polymer LEDs; and

a light-absorbing filter layer covering said display;

the display device further comprising;

a semi-transparent reflective layer covering said filter layer for transmitting light emanating from said polymer LED display and for reflecting ambient light incident on said semi-transparent reflective layer, so as to obscure said electrical connections for exciting said polymer LEDs.

2. An electronic display device as claimed in claim 1, characterized in that said semi-transparent reflective layer is a reflective polarizing layer.

3. An electronic display device as claimed in claim 1, characterized in that said polymer LED display, said light-absorbing filter, and/or said semi-transparent reflective layer are coupled via an anti-reflective coating.

4. An electronic display device as claimed in claim 1, characterized in that the semi-transparent reflective layer is a brightness-enhancing layer manufactured by 3M Company of St. Paul, Minn. under the trade designation “

DUAL BRIGHTNESS ENHANCEMENT FILM”

.

5. An electronic appliance comprising an electronic display as claimed in claim 1.

6. An electronic appliance as claimed in claim 5, characterized in that it comprises an electric shaver.